Calculation of Duty, Surtax & VAT — The Four-Step Build-Up

This lesson sits a position that is structurally distinctive. Modules 1 to 4 each developed one of the four pillars of duty determination:

• tariff classification (the rate)
• customs valuation (the base)
• origin and preference (the rate adjustment for regional trade)
• rebates (the relief system)

The economic stakes of mastering this integrative skill are considerable. Every Bill of Entry lodged in ASYCUDA World: there are tens of thousands daily across Zimbabwe's ports of entry — is, at heart, the output of the calculation taught in this module. An error at any step of the chain produces an error in the duty assessment, which produces either fiscal loss to the State (where the error under-states duty) or unjustified cost to the importer (where the error over-states duty). Both outcomes are corrosive: the first depletes the fiscus; the second poisons the relationship between traders and the customs administration. Accurate, defensible, well-documented duty calculations are the foundation of a functioning customs system.

The duty calculation is also where the abstract becomes concrete. Tariff classification, customs valuation, and origin determinations are technical exercises in legal interpretation; the duty calculation translates those interpretations into a number — a specific amount of money that the importer must pay before the goods are released. The number is not negotiable; it is the operative determination on which the State's revenue depends and on which the importer's commercial decision-making depends. The customs professional must therefore approach the calculation with the discipline of an accountant and the legal sensitivity of a tax counsel.

A.2 What This Module Adds Beyond Modules 1 to 4

Several elements taught in this module are introduced for the first time. The first is the structure of duties and taxes payable on importation: customs duty is only one of several charges, and the customs professional must understand each. Surtax (an additional ad valorem charge on certain goods) is levied under section 97 of the Customs and Excise Act, with rates prescribed in the annual Surtax Tariff Notice. Excise duty is levied under sections 95 and 226 on excisable goods (alcoholic beverages, tobacco products, fuels, and certain other locally-produced or imported goods) at rates prescribed in the Excise Tariff. VAT on importation is levied under section 6(1)(b) of the VAT Act read with section 12A, on a base that includes customs duty, surtax, and excise duty, producing a multiplicative effect that the customs professional must understand. The AIDS levy and (where applicable) the carbon tax are further charges that operate on specific tariff lines.

The second element is the order-of-computation doctrine. The four pillars of duty determination must be applied in the correct sequence:

1. Classify first. The tariff line determines every subsequent rate.
2. Value second. The customs value is the base on which the rate is applied.
3. Apply origin third. Preferential origin can reduce or eliminate the otherwise-applicable rate.
4. Compute duty last. Duty is the product of value and the rate applicable after classification, valuation and origin have been settled.

The third element is the multi-currency system. Zimbabwe operates a multi-currency environment: the United States dollar (USD) and the Zimbabwe Gold (ZiG, in force since April 2024) are both legal tender, and customs duties are payable in either depending on the goods. The Customs and Excise (Designation of Foreign Currency Dutiable Goods) Notice, SI 252A of 2018 (as amended), enumerates the goods that must be cleared in foreign currency. ZIMRA publishes Rates of Exchange for Customs Purposes fortnightly, and the customs professional must apply the correct rate to the correct goods, distinguishing between USD-payable goods and ZiG-payable goods.

The fourth element is the suspension architecture. The General Suspension Regulations (SI 257 of 2003) and the various preferential suspensions (under the trade agreements) operate to reduce or eliminate customs duty on specified goods, independently of the rebates system. The customs professional must understand which goods qualify for each suspension, whether the suspension affects only customs duty or also surtax, and how suspensions interact with rebates and preferences.

Five sections of the Customs and Excise Act [Chapter 23:02] are the statutory pillars of the duty calculation system.

• section 38(1) (read with section 86) — prohibits any importation of goods without an entry being made or without the duty being paid or secured. The section establishes the legal obligation to pay duty as a precondition of release into Zimbabwean commerce. The Bill of Entry is the documentary instrument through which the entry is made and the duty calculated.
• section 95 — authorises the levying of excise duty on locally manufactured and imported excisable goods. The rates are prescribed in the Excise Tariff (a separate schedule from the Customs Tariff) and are amended periodically by Statutory Instrument.
• section 97 — authorises the levying of surtax. The rates are prescribed in the Surtax Tariff Notice (SI 112 of 2012 as amended by subsequent annual Finance Acts and tariff orders). Surtax is an additional ad valorem charge on specified tariff lines (often goods regarded as luxury or non-essential, or goods produced domestically and protected through surtax).
• section 98 — provides the legal recognition for trade agreements, rebates, refunds, drawbacks, remissions, and warehousing. The section is the umbrella provision under which the various preferential and relief regimes operate, integrating them with the duty-calculation architecture.
• section 226 — prescribes the application of excise rates to re-imported goods (recall the Re-importation Rebate analysis in Module 4) and provides certain technical adjustments.

B.2 The Value Added Tax Act and SI 273 of 2003

VAT on importation is governed by the Value Added Tax Act [Chapter 23:12]. Section 6(1)(b) imposes VAT on the importation of goods. Section 12A prescribes the value for VAT on importation: the customs value (computed under sections 105 to 113 of the Customs and Excise Act, as examined in Module 2) plus customs duty plus surtax plus excise duty plus any other charges levied under any other Act in connection with the importation. The VAT base is therefore the post-customs-duty, post-surtax, post-excise base, which produces the multiplicative fiscal effect of VAT on importation: VAT is calculated on a base that already includes the customs duty.

The VAT rate is prescribed in the VAT Act and is currently 15 per cent for the standard rate. Zero-rating and exemption operate under the VAT General Regulations (originally SI 273 of 2003, as amended; the operative consolidated instrument is SI 15 of 2024) and the schedules to the VAT Act. The Second Schedule to SI 273 of 2003 enumerates exemptions on importation, which include (among other items) animal feed, lick, and remedy; fertiliser; pesticides; live plants for cultivation; seed for cultivation; tractors and parts thereof under HS 8708.9910; meat of bovine animals fresh or chilled (HS 0201.10–0201.30); and meat of bovine animals frozen (HS 0202.10–0202.30). The customs professional must consult the current schedules to identify the correct VAT treatment for each tariff line. Goods imported under a rebate of customs duty are also exempt from VAT on importation, on the principle that VAT is computed on a base that includes customs duty and the absence of customs duty produces a corresponding absence of the VAT base.

B.3 The General Suspension Regulations — SI 257 of 2003

Suspensions operate independently of preferences and rebates. The General Suspension Regulations (SI 257 of 2003) prescribe goods on which customs duty is suspended on an unconditional basis:

• every importer of the prescribed goods enjoys the suspension regardless of the importer's identity, the country of origin, or the purpose of the importation. The principal categories under SI 257 of 2003 include medicines supplied under prescription by a medical practitioner
• goods imported by the blind and disabled (subject to such conditions as the Commissioner may impose)
• packing containers
• kerosene. The schedules to SI 257 of 2003 are amended periodically
• the customs professional must consult the current consolidated version

Beyond the General Suspension, preferential suspensions operate under the trade agreements. SI 244 of 2000 (the COMESA Regulations) provides for a wholesale suspension of customs duty on COMESA-originating goods. SI 317 of 2000 (the legacy RSA bilateral) operates a graduated extent-of-reduction system, applying a percentage reduction to the general suspension rate for affected goods. The treatment varies between agreements and the customs professional must work agreement-by-agreement when computing duty on a preferential consignment.

B.4 The Designation of Foreign Currency Dutiable Goods Notice

The Customs and Excise (Designation of Foreign Currency Dutiable Goods) Notice, SI 252A of 2018 (as amended, including by SI 72A of 2022 which prescribes the 50 per cent foreign currency / 50 per cent local currency split for designated vehicles of tariff heading 8703), prescribes the goods on which customs duty, surtax, excise duty, and VAT on importation must be paid in foreign currency (United States dollars). Goods not designated under SI 252A may be cleared in Zimbabwe Gold (ZiG, since April 2024) or in foreign currency at the importer's option (depending on the operative monetary policy framework). The Notice is amended frequently; the customs professional must always work from the current consolidated version.

The currency framework is operationally important for two reasons. First, the customs professional must know in which currency to compute the duty — a USD computation produces a USD duty, payable in USD, while a ZiG computation produces a ZiG duty, payable in ZiG. Second, where the commercial invoice is in a third currency, the relevant Reserve Bank of Zimbabwe rate of exchange must be applied at the time of entry, and the supporting documentation must show the source and date of the rate used.

B.5 Specific Charges — AIDS Levy, Carbon Tax, and Other

Several specific charges may apply on importation in addition to the principal duties. The AIDS levy is a small percentage charge applied to imports of certain goods to fund HIV/AIDS programmes. The carbon tax operates on motor fuels and certain other carbon-intensive imports. Tobacco-specific levies, alcoholic beverage charges, and various specific levies are imposed on identified goods. The customs professional must examine the tariff line in ASYCUDA World to identify any specific charges applicable to the particular consignment; the system computes them automatically once the tariff line is correctly identified.

B.6 Recent Amendments

The Finance Act No. 7 of 2025 introduced adjustments to several rate structures, particularly in the surtax architecture (where additional surtax was introduced on certain luxury imports as part of the local-content protection policy) and in the excise architecture (where excise rates on alcoholic beverages and tobacco were adjusted upward in line with public-health policy). The Finance Bill 2026 contains proposed adjustments to the VAT exemption schedules, the carbon tax base, and certain elements of the General Suspension Regulations. The customs professional should monitor the Bill's progress and update practice on its enactment. ZIMRA Public Notices issued throughout the year operationalise these amendments and should be consulted at every Bill of Entry.

The customs professional should never approach a duty calculation without first identifying every charge that may apply to the consignment. The principal charges in Zimbabwean practice are:

Charge	Statutory anchor	Base	Typical rate
Customs Duty	section 86 Customs Act; First Schedule	Customs Value	Per tariff line (0%–60%)
Surtax	section 97 Customs Act; Surtax Tariff	Customs Value	Per Notice (0%–35%)
Excise Duty	section 95 Customs Act; Excise Tariff	Per Excise Tariff	Specific or ad valorem
VAT on Importation	section 6(1)(b), 12A VAT Act	CV + CD + Surtax + Excise	15% standard
AIDS Levy	Income Tax Act / specific notices	Per notice	Generally 3%
Carbon Tax	Specific notices	Per fuel type	Per litre / per tonne
Specific Levies	Per Statutory Instrument	Per item	As prescribed

The customs professional must reason from the tariff line outward: having classified the goods (Module 1) and computed the customs value (Module 2), the next steps are to identify which of these charges apply to the tariff line and to compute each in the correct sequence on the correct base.

C.2 The Order of Computation

The order in which charges are computed matters because some charges enter into the base of others. The standard order is:

• Step 1 — Compute Customs Value (CIF) per Module 2.
• Step 2 — Apply the customs duty rate (general or preferential, per Module 3) to the customs value to compute Customs Duty.
• Step 3 — Apply the surtax rate (where applicable) to the customs value (or such other base as the Surtax Notice prescribes) to compute Surtax.
• Step 4 — Apply the excise rate (where applicable) to the prescribed excise base to compute Excise Duty.
• Step 5 — Compute the VAT base: Customs Value + Customs Duty + Surtax + Excise + any other charges levied on importation.
• Step 6 — Apply the VAT rate (15% standard, 0% zero-rated, exempt) to the VAT base to compute VAT on Importation.
• Step 7 — Add any specific charges (AIDS levy, carbon tax, levies) computed on their prescribed bases.
• Step 8 — Apply rebates (per Module 4) to relieve all or part of the foregoing.
• Step 9 — Sum to produce Total Amount Payable to ZIMRA.

The discipline of the order is that each step builds on the previous. A customs professional who computes VAT before customs duty cannot have computed VAT correctly, because the VAT base includes customs duty. A customs professional who applies a rebate before identifying the duty has skipped the analytical work that determines whether the rebate is in fact engaged. The order is not optional.

C.3 The Four Rate Types

The First Schedule to the Customs and Excise Act prescribes four types of duty rates. Each requires a distinct computational treatment, and the customs professional must recognise the rate type on sight from the tariff entry.

C.3.1 Ad Valorem Rate

The ad valorem rate is expressed as a percentage of the customs value. It is the most common rate type and the simplest to apply. A tariff line at 25% ad valorem on a customs value of US$ 10 000 produces customs duty of US$ 2 500. The Value for Duty Purposes (VDP) should always be expressed to two decimal places; the resulting duty is rounded to the nearest cent.

C.3.2 Specific Rate

The specific rate is expressed as an amount per unit of measurement — per litre, per kilogram, per metre, per item, per litre of absolute alcohol (LAA), and so on. A tariff line at US$ 5 per litre on a consignment of 45 litres produces customs duty of US$ 225. The specific rate is most common on goods that are sold by volume or weight (alcoholic beverages, fuels, certain agricultural products). The customs professional must identify the correct unit of measurement, convert the consignment to that unit (a process that may require unit conversion), and apply the rate.

C.3.3 Alternative Rate

The alternative rate prescribes two separate rate calculations connected by the word "or", and the customs professional applies both, comparing the results and using the higher. The rationale is fiscal protection: the alternative rate ensures that the State collects the higher of two computational outcomes regardless of how the goods are valued or measured. A tariff line at "US$ 5 per litre OR US$ 10 per litre of absolute alcohol plus excise" requires two parallel computations:

• First option: 5 dollars per litre on the litreage of the consignment.
• Second option: 10 dollars per litre of absolute alcohol on the LAA equivalent of the consignment, plus excise.

The two are independently calculated and the higher is selected. The "OR" is doctrinally critical: each part is independent, and the customs professional must not interpret it as cumulative.

C.3.4 Combination Rate

The combination rate prescribes two rate calculations connected by "PLUS", and the customs professional applies both and adds them. The combination may be ad valorem plus specific (typical for branded textiles: tariff line "40% + US$ 3/kg" applies a 40 per cent ad valorem charge and adds US$ 3 per kilogram), or two ad valorem rates (typical for excisable goods, where customs duty plus excise duty are both ad valorem). The "PLUS" is doctrinally critical: each part is to be added, not selected.

C.4 The Worked Distinction Between "OR" and "PLUS"

The most-tested point in Zimbabwean calculation-of-duty practice is the distinction between the alternative ("OR") and combination ("PLUS") rate types. The customs professional must read the tariff entry carefully and identify the operative connector.

Worked illustration. Five cases of rum, each containing 12 bottles of 750 ml at 43.5 per cent strength. The tariff line at HS 2208.4019 reads "US$ 5 per litre OR US$ 10 per litre of absolute alcohol PLUS excise". The customs professional must recognise that "OR" connects the first option to the second, and "PLUS" within the second option connects the LAA charge to the excise component.

Step 1 — Compute the litreage. 5 cases × 12 bottles × 0.75 litres = 45 litres.

Step 2 — First option: US$ 5 per litre on 45 litres = US$ 225.

Step 3 — Compute the LAA (litres of absolute alcohol). 45 litres × 43.5% = 19.575 LAA.

Step 4 — Second option, first component: US$ 10 per LAA on 19.575 LAA = US$ 195.75.

Step 5 — Second option, second component: excise at the prescribed rate (assume US$ 5 per LAA for this illustration) on 19.575 LAA = US$ 97.88.

Step 6 — Total of second option: US$ 195.75 + US$ 97.88 = US$ 293.63.

Step 7 — Compare: First option US$ 225; Second option US$ 293.63. Take the higher: US$ 293.63.

Customs duty payable: US$ 293.63. This illustrates how the rate-type analysis drives the computational structure.

C.5 The Suspension Regimes

Suspensions reduce or eliminate customs duty (and, in some cases, surtax) without engaging the rebate machinery. Two principal suspension regimes operate:

C.5.1 The General Suspension — SI 257 of 2003

The General Suspension Regulations (SI 257 of 2003) suspend customs duty unconditionally on specified goods imported by anyone. The principal categories include medicines supplied on a doctor's prescription, goods for the blind and disabled, packing containers, and kerosene. The customs duty is suspended (to nil or to a reduced rate); other charges (surtax, excise, VAT) are computed normally on the suspended duty rate. The General Suspension is unconditional — it operates regardless of origin, importer identity, or purpose.

C.5.2 Preferential Suspensions Under the Trade Agreements

The trade agreements operate as suspensions of customs duty (and, under most agreements, of surtax) on goods originating in the partner country. The treatment varies: SADC: customs duty progressively suspended to nil under the liberalisation schedules (most categories now at zero); surtax and VAT operate on the suspended customs duty.; Within the SADC framework, Zimbabwe has also concluded bilateral Trade Agreements (TAGs) with Botswana (ZW–BW), Namibia (ZW–NA), Malawi (ZW–MW), and Mozambique (ZW–MZ). These TAGs prescribe rules of origin and product-specific concessions that may operate alongside, and in some cases more favourably than, the general SADC schedule. The customs professional must consult the relevant TAG when goods originate from one of these four states, because the preferential rate granted under a TAG can differ from the general SADC rate.; COMESA (SI 244 of 2000): customs duty and surtax wholly suspended on COMESA-originating goods (section 3(1) of SI 244 of 2000). Section 3(2) makes the suspension reciprocal, contingent on Zimbabwean exports enjoying the same treatment in the partner state. Section 3(3) deals with excisable goods imported from COMESA: excise duty is collected at the Zimbabwean Excise Tariff rate.; Bilateral agreements (Botswana, Malawi, Namibia, Mozambique): customs duty free under each Article. Surtax treatment varies (Botswana: payable; Malawi: free; Namibia: free; Mozambique: free). Excise: payable in all bilaterals on excisable goods at the Zimbabwean rate. VAT: payable except where zero-rated or exempt, in all bilaterals except Mozambique (where VAT is also free under the broad definition of "import duties" in Article I(1)).; RSA legacy (SI 317 of 2000): an "extent of reduction" system that reduces (rather than wholly suspends) the customs duty on affected goods. The customs professional must check the Suspension Regulations and apply the reduction on the general suspension rate before applying the trade agreement reduction.; AfCFTA: progressively suspends customs duty according to Zimbabwe's tariff offer schedules; the customs professional must consult the current schedule..

C.5.3 Excisable Goods Under SADC

A specific rule applies to excisable goods imported from SADC member states. Where the SADC preferential rate (typically zero) is lower than the Zimbabwean local excise rate, customs duty is collected at the local excise rate. The customs duty rate, in effect, is set equal to the excise rate for the same goods. The rule prevents the SADC preference from being used to circumvent the excise system, which operates on Zimbabwean excise policy considerations independent of trade-policy considerations.

C.6 Excise Duty in Detail

Excise duty is a separate fiscal system from customs duty. It is levied under section 95 of the Customs and Excise Act on:

• goods locally manufactured in Zimbabwe
• imported goods that are excisable. The excise rates are prescribed in the Excise Tariff (separately from the Customs Tariff) and are amended periodically. The principal excisable categories are alcoholic beverages, tobacco products, fuels, and certain other items added by the Minister from time to time.

A doctrinally important feature of the excise system is that surtax is suspended on all excisable goods. The reason is that excise itself functions as the targeted fiscal charge on the excisable category; adding surtax would produce a double-charge effect inconsistent with the policy purpose of each charge. The customs professional computing excise on a tariff line must therefore confirm that no surtax is also being computed on the same line.

Excise rates are typically specific (per litre, per kilogram, per LAA, per cigarette). The customs professional applies the specific rate to the relevant unit and obtains the excise duty. Where the excise is ad valorem, it is computed on the customs value (or such other base as the Excise Tariff prescribes).

C.7 VAT on Importation in Detail

VAT on importation is governed by section 6(1)(b) read with section 12A of the VAT Act. The VAT base is:

VAT Base = Customs Value + Customs Duty + Surtax + Excise Duty + Other Importation Charges

The standard rate is 15 per cent. Zero-rating applies to goods listed in the Second Schedule to the VAT General Regulations (SI 273 of 2003 as amended by SI 15 of 2024) — principally inputs to agriculture, certain foodstuffs, and certain medical and educational items. Exemption applies to goods imported under a customs duty rebate (the policy reasoning being that no duty is in the base, so no VAT applies on the duty-inclusive amount, and the policy of relief extends through to VAT on the original customs value).

A practical consequence of the formula is that VAT on importation cascades through every other charge. A US$ 100 increase in customs duty produces a US$ 15 increase in VAT (15% × US$ 100). A US$ 100 increase in surtax produces a US$ 15 increase in VAT. The customs professional reasoning through a duty calculation should track the VAT consequence of each variation.

A second practical consequence is that goods cleared under a rebate of customs duty are typically exempt from VAT on importation. The Travellers' Rebate, the Immigrants' Rebate, the Diplomatic Rebate, and the Inheritance Rebate (where a vehicle or other dutiable goods are imported under rebate) all engage this exemption. Goods cleared under preference but not under rebate are not necessarily VAT-exempt: the customs duty is reduced or eliminated under the preferential rate, but VAT is still computed on the (now-lower) base.

C.8 The Multi-Currency Regime

Zimbabwe operates a multi-currency framework. The United States dollar (USD) is legal tender; Zimbabwe Gold (ZiG, issued by the Reserve Bank of Zimbabwe in April 2024 as the successor to the Zimbabwe Dollar) is also legal tender. For customs purposes, certain goods are designated under SI 252A of 2018 (as amended) as foreign-currency dutiable goods — duty must be paid in foreign currency (USD). Goods not so designated may be cleared in either currency depending on the operative monetary framework and the importer's election.

Where the commercial invoice is in a third currency (EUR, GBP, ZAR, CNY), the customs professional must convert to the duty currency using the ZIMRA Rates of Exchange for Customs Purposes published fortnightly. The rate applicable is the rate prevailing on the date of importation under section 17 of the Customs and Excise Act. ASYCUDA World applies the correct rate automatically from the published schedule, but the customs professional must verify the conversion in any manual computation or audit response.

C.9 Rebates and the Calculation

Rebates relieve all or part of the calculated duty. The rebate is applied at the end of the computation chain, after customs duty, surtax, excise, and VAT have all been calculated. A rebated consignment may have customs duty, surtax, excise, and VAT all rebated (a Total Rebate situation), or only some of these rebated (a partial-coverage situation). The customs professional must consult the specific Regulation governing the rebate to identify the scope of relief.

Where a rebate is applied:

• The Travellers' Rebate (Reg. 114) typically rebates customs duty, surtax, and (where the goods would otherwise be subject to VAT) VAT. Excise on excisable goods within the partial-rebate basket may or may not be rebated depending on the provision.
• The Immigrants' Rebate (Reg. 105) rebates customs duty in full; surtax, excise, and VAT may be rebated separately depending on the goods.
• The Diplomatic Rebate (Reg. 102) typically extends to all charges (customs duty, surtax, excise, VAT) on goods supplied directly to the diplomat for personal or official use.
• The Mozambique Trade Agreement extends to customs duty, surtax, excise, and VAT (the Article I(1) "import duties" definition encompasses all four).
• Most other agreements extend to customs duty and surtax only, leaving excise and VAT payable on the suspended-customs-duty base.

In ASYCUDA World, the duty calculation is automated. The clearing agent enters the tariff line, the customs value, the country of origin, the relevant Customs Procedure Code (which signals any preferences, rebates, or suspensions), and the supporting documents. The system computes customs duty, surtax, excise, VAT, and any specific levies on the basis of the rate matrix for the tariff line and the operative system. The system flags any inconsistencies (for example, a preference claim without a Certificate of Origin attached, or a rebate claim without the supporting Form). Once the agent confirms the entry, the system produces the duty assessment and (subject to lane-targeting) authorises release.

The customs professional is not, however, relieved of the analytical work by the system. ASYCUDA can only compute correctly on the basis of the inputs supplied by the agent. A wrongly classified consignment, a wrongly valued consignment, a wrongly origin-flagged consignment, or a misapplied rebate will produce a wrong duty assessment that is no less wrong for having been generated by the system. The customs professional must do the analytical work first and use ASYCUDA to compute and document the result; the order of dependence is from analyst to system, not from system to analyst.

D.2 Manual Computation in Audit Responses

Where the customs professional is responding to a post-clearance audit, replicating an ASYCUDA computation manually, or working through a hypothetical for training purposes, the order-of-computation discipline must be followed rigorously. A manual computation should typically be presented in a tabular format that shows each step explicitly, with the rate, base, and computed amount for each charge. The format adopted in the worked examples below is the recommended ZIMRA practice format: it produces a defensible audit trail that can be reproduced by another customs professional working from the same inputs.

D.3 Currency Discipline

Every line of the calculation must specify the currency. Mixing USD figures with ZiG figures within a single computation is the most common error in manual computation. The customs professional should establish at the outset of the calculation which currency is operative for the goods at hand (per SI 252A of 2018 and the operative monetary framework), perform any necessary conversions of foreign-currency invoices using the ZIMRA Rates of Exchange for Customs Purposes for the relevant period, and proceed in the operative duty currency throughout. Where the calculation must produce both USD and ZiG outputs (for example, where some elements are USD-payable and others are ZiG-payable), the computation should be presented in two separate parallel columns, not interleaved.

D.4 Documentation and Reasoning

A duty calculation is a documentary instrument as well as an arithmetic one. The customs professional should record, alongside the numbers, the legal basis for each step:

• the tariff line and the rate type (citing the First Schedule)
• the customs value and the basis of valuation (citing the relevant section 105 to 113 provision)
• the origin determination (citing the relevant trade agreement and certificate of origin)
• the rebate or suspension claim (citing the relevant Regulation)
• the VAT treatment (citing SI 273 of 2003 or section 6(1)(b))
• the currency of payment (citing SI 252A of 2018). A calculation accompanied by its legal reasoning is defensible against post-clearance audit
• a calculation that is merely arithmetic, without legal anchoring, is not

A Harare retailer imports a consignment of cosmetics from Brazil by sea, arriving at Beira and onward to Beitbridge by road. The customs value (CIF Beitbridge) is US$ 50 000. The applicable tariff line attracts 25 per cent customs duty, no surtax, no excise, and 15 per cent VAT (standard-rated). No preference, no rebate, no suspension applies. Compute the total amount payable to ZIMRA.

Customs Value (CIF)	US$ 50 000.00
Customs Duty: 25% × US$ 50 000	US$ 12 500.00
Surtax	Nil
Excise Duty	Nil
VAT base: CV + CD + Surtax + Excise = 50 000 + 12 500	US$ 62 500.00
VAT on Importation: 15% × US$ 62 500	US$ 9 375.00
Total amount payable to ZIMRA: CD + Surtax + Excise + VAT	US$ 21 875.00

E.2 Worked Example 2 — Combination Rate (Ad Valorem + Specific) with Surtax

A Bulawayo apparel wholesaler imports branded coats from Hong Kong by air. The consignment is 200 coats with a total customs value of US$ 30 000, total weight 320 kg. The tariff line at HS 6201.1110 reads "40% + US$ 3/kg". Surtax of 20 per cent applies. VAT at 15 per cent applies. No preference, no rebate, no suspension.

Customs Value	US$ 30 000.00
Customs Duty (40% ad valorem): 40% × US$ 30 000	US$ 12 000.00
Customs Duty (specific): US$ 3/kg × 320 kg	US$ 960.00
Total Customs Duty (combination)	US$ 12 960.00
Surtax: 20% × US$ 30 000	US$ 6 000.00
Excise Duty	Nil
VAT base: 30 000 + 12 960 + 6 000	US$ 48 960.00
VAT on Importation: 15% × US$ 48 960	US$ 7 344.00
Total amount payable to ZIMRA	US$ 26 304.00

Note the structure: the combination rate is applied additively (the ad valorem and specific components are both computed and added). Surtax is independent of customs duty in its base (computed on the customs value, not on the customs-duty-inclusive base — this depends on the Surtax Notice; some surtax provisions use the customs-duty-inclusive base). VAT is computed on the customs-duty-and-surtax-inclusive base.

E.3 Worked Example 3 — Alternative Rate with Excise (Spirits)

Five cases of rum are imported from Cuba by sea via Durban. Each case contains 12 bottles of 750 ml at 43.5 per cent ABV (alcohol by volume). The tariff line at HS 2208.4019 reads "US$ 5/L OR US$ 10/LAA + Excise". The applicable excise rate on imported spirits is US$ 5 per LAA (assumed for this illustration). The customs value (CIF Beitbridge) is US$ 1 200. The consignment originates outside any trade agreement; surtax of 25 per cent and VAT at 15 per cent apply. No rebate.

Step 1:

• Compute litreage and LAA. 5 ×
• 12 ×
• 0.75 = 45 L. LAA = 45 ×
• 0.435 = 19.575 LAA

Step 2: Apply the alternative rate test. First option: US$ 5 × 45 L = US$ 225. Second option: US$ 10 × 19.575 LAA = US$ 195.75 (LAA component only — the excise is now to be computed below, not as part of the alternative-rate comparison; in some Tariff Notice formulations, the excise is included within the second option for comparison purposes, in which case the second option is US$ 195.75 + excise of US$ 97.88 = US$ 293.63). For this illustration, we adopt the formulation in which the excise is part of the second-option comparison (per the existing slide deck): second option = US$ 293.63.

Step 3 — Select the higher: customs duty = US$ 293.63. (Where the alternative rate excludes excise from the comparison, only US$ 195.75 is the second-option customs duty, the higher is then US$ 225 from the first option, and excise is separately added.)

Step 4 — Compute the other charges. Surtax is suspended on excisable goods (rum is excisable), so surtax is nil. Excise is already included in the customs duty under this formulation. VAT base = customs value + customs duty + surtax + excise = US$ 1 200 + US$ 293.63 + 0 + 0 = US$ 1 493.63 (where excise is already within customs duty). VAT = 15% × US$ 1 493.63 = US$ 224.04.

Customs Value	US$ 1 200.00
Customs Duty (alternative rate, second option higher)	US$ 293.63
Surtax (suspended on excisable goods)	Nil
Excise (subsumed in second option of alternative rate)	(within CD)
VAT base: CV + CD = 1 200 + 293.63	US$ 1 493.63
VAT on Importation: 15% × US$ 1 493.63	US$ 224.04
Total amount payable to ZIMRA	US$ 517.67

E.4 Worked Example 4 — SADC Preference with Surtax and VAT

A Harare wholesaler imports a consignment of furniture from South Africa, qualifying as SADC-originating (a SADC Certificate of Origin is presented). Customs value (CIF Beitbridge) is US$ 80 000. The tariff line attracts 40 per cent customs duty under the general rate; 0 per cent under the SADC preferential rate. Surtax of 15 per cent applies (surtax is not generally suspended under SADC; it operates as a non-preferential charge). VAT at 15 per cent applies.

Customs Value	US$ 80 000.00
Customs Duty (SADC preference: 0%)	Nil
Surtax: 15% × US$ 80 000	US$ 12 000.00
Excise Duty	Nil
VAT base: 80 000 + 0 + 12 000	US$ 92 000.00
VAT on Importation: 15% × US$ 92 000	US$ 13 800.00
Total amount payable to ZIMRA	US$ 25 800.00

Note: under the general rate (without SADC preference), customs duty would have been US$ 32 000, surtax remains US$ 12 000, VAT base would be US$ 124 000, VAT would be US$ 18 600, and total payable would be US$ 62 600. The SADC preference therefore saves US$ 36 800 in this scenario — a 59 per cent reduction in the amount payable to ZIMRA. This illustrates the commercial significance of properly invoked preferential treatment.

E.5 Worked Example 5 — Returning Migrant under Immigrants' Rebate

A returning Zimbabwean migrant arrives at Beitbridge with a household consignment qualifying for the Immigrants' Rebate (Module 4, Regulation 105). The consignment includes household furniture (customs value US$ 25 000) and one motor vehicle (customs value US$ 35 000, customs duty rate 40%, surtax rate 35%, no excise). All goods qualify for the rebate. Compute the duty position before and after the rebate.

Before the rebate (the prima facie position):

Customs Value (furniture)	US$ 25 000.00
Customs Value (motor vehicle)	US$ 35 000.00
Total Customs Value	US$ 60 000.00
Customs Duty on furniture (assume 25%)	US$ 6 250.00
Customs Duty on motor vehicle (40%)	US$ 14 000.00
Surtax on motor vehicle (35%)	US$ 12 250.00
Total CD + Surtax	US$ 32 500.00
VAT base: 60 000 + 32 500	US$ 92 500.00
VAT: 15% × 92 500	US$ 13 875.00
Prima facie total payable to ZIMRA	US$ 46 375.00

After the Immigrants' Rebate (Regulation 105):

Customs Duty (rebated under Reg. 105)	Nil
Surtax (rebated under Reg. 105)	Nil
VAT (exempt as no customs duty in base, per VAT Act and rebate-exemption principle)	Nil
Total payable to ZIMRA after rebate	Nil

The rebate produces a complete fiscal saving of US$ 46 375 for the migrant. The 24-month no-disposal restriction under Regulation 105(5) attaches to the goods; the residual-duty formula (A × C / B) applies in the event of disposal within the restricted period (per Module 4).

E.6 Worked Example 6 — COMESA-Originating Goods with Excise

A Harare retailer imports a consignment of beer from Zambia, qualifying as COMESA-originating (a COMESA Certificate of Origin is presented). Customs value is US$ 20 000. The tariff line attracts 40 per cent customs duty under the general rate; 0 per cent under COMESA (SI 244 of 2000, section 3(1) — wholly suspended). Surtax is also wholly suspended under COMESA section 3(1) at 25 per cent general rate. Excise on imported beer is US$ 0.20 per litre at the prescribed Excise Tariff rate; the consignment is 8 000 litres. (Per SI 244 of 2000 section 3(3), excise is collected at the Zimbabwean Excise Tariff rate on excisable goods imported from COMESA, notwithstanding the customs duty suspension.) VAT at 15 per cent applies.

Customs Value	US$ 20 000.00
Customs Duty (COMESA suspended under SI 244 of 2000 section 3(1))	Nil
Surtax (COMESA suspended under SI 244 of 2000 section 3(1))	Nil
Excise Duty: US$ 0.20 × 8 000 L (per SI 244 of 2000 section 3(3))	US$ 1 600.00
VAT base: 20 000 + 0 + 0 + 1 600	US$ 21 600.00
VAT on Importation: 15% × US$ 21 600	US$ 3 240.00
Total amount payable to ZIMRA	US$ 4 840.00

The COMESA preference produces a substantial saving on customs duty and surtax, but the excise charge is preserved by the explicit section 3(3) provision. The customs professional must apply the same logic on every COMESA importation of excisable goods.

E.7 Worked Example 7 — Foreign Currency Designated Goods

A Harare retailer imports a consignment of motor vehicle spares (customs value US$ 15 000) from China by sea. The tariff line is designated under SI 252A of 2018 as foreign-currency-dutiable: customs duty, surtax, excise, and VAT must all be paid in USD. Customs duty is 25 per cent, surtax 10 per cent, no excise, VAT 15 per cent. The commercial invoice is in CNY at CNY 100 000 with the ZIMRA Rate of Exchange for Customs Purposes for the period at CNY 7.20 per USD.

Step 1 — Convert. CNY 100 000 / 7.20 = US$ 13 888.89. (Plus any freight and insurance components per Module 2; for this illustration, assume the customs value of US$ 15 000 already includes them properly converted.)

Customs Value (USD, post-conversion)	US$ 15 000.00
Customs Duty: 25% × US$ 15 000 (in USD per SI 252A of 2018)	US$ 3 750.00
Surtax: 10% × US$ 15 000	US$ 1 500.00
Excise	Nil
VAT base: 15 000 + 3 750 + 1 500	US$ 20 250.00
VAT on Importation: 15% × US$ 20 250 (in USD)	US$ 3 037.50
Total amount payable to ZIMRA	US$ 8 287.50 (USD)

All charges are payable in USD because the goods are designated under SI 252A of 2018. Had the goods not been so designated, the importer might have elected to pay in ZiG, with the conversion performed at the operative ZiG/USD rate published by ZIMRA.

Most individual travellers do not engage with the full duty calculation: they are processed through the Travellers' Rebate (Module 4) or under simplified-trade-system provisions. Where a traveller imports goods exceeding the rebate thresholds, however, the customs officer at the border applies the full calculation: identifying the tariff line (Module 1), valuing the goods (Module 2), determining origin (Module 3), applying any partial-rebate relief (Module 4), and computing the residual customs duty, surtax, excise (where applicable), and VAT. A returning Zimbabwean importing a high-value motor vehicle outside the Immigrants' Rebate window faces this full calculation, often producing a sobering duty bill.

F.2 SMEs

SMEs are the principal users of the duty calculation in routine commercial practice. Every Bill of Entry lodged by an SME importer or by a clearing agent on the SME's behalf engages the calculation. The SME's commercial pricing depends critically on getting the calculation right at the planning stage: a misjudged duty assessment can render an importation unprofitable, while a correctly-anticipated duty assessment supports realistic pricing. SMEs operating regional supply chains use the preferential rates extensively and must run dual calculations (general vs preferential) to evaluate the commercial case for sourcing within SADC, COMESA, AfCFTA, or the bilateral countries. gives the SME the analytical framework for these decisions.

F.3 Large Corporates

Large corporate importers typically run sophisticated landed-cost models that integrate the full duty calculation with freight, insurance, post-importation transport, customs broker fees, and other landed-cost components. The customs department within such a corporate is often a discrete function staffed by qualified customs professionals and supported by an in-house or external consulting customs lawyer. The corporate uses binding tariff rulings (Module 1) to lock in classification, transfer-pricing studies (Module 2) to lock in valuation, registered preferential exporters (Module 3) to lock in origin, and standing rebate registrations (Module 4) where applicable. The duty calculation under This lesson is the daily output of this framework, replicated thousands of times annually across the corporate's import flows.

F.4 Cross-Border Traders

Cross-border traders operating within the simplified-trade system under COMESA or analogous SADC arrangements bypass much of the full calculation: their goods are duty-free below the threshold under the simplified COMESA Certificate of Origin and Simplified Bill of Entry. Above the threshold, the CBT engages the full calculation but typically through a clearing agent rather than personally. The customs professional advising CBTs should ensure that the agent applies the calculation correctly and that the CBT understands the duty cost of any importation outside the simplified system.

F.5 ZIMRA Officers

ZIMRA officers at the border, in the post-clearance audit function, and in the Origin and Valuation Sections all perform the calculation routinely. The border officer must be able to perform the calculation in real time, often within minutes of a Bill of Entry being lodged. The audit officer must be able to recompute past Bills of Entry, applying the rules in force at the time, to identify any short-paid duty. The Section officer must be able to advise on contested elements of the calculation and produce reasoned assessments. Each of these roles depends on integrated mastery of Modules 1 to 5.

Reported Zimbabwean authority specifically on duty calculation as such is sparse. Most reported decisions address the upstream determinations (classification, valuation, origin, rebate eligibility); once those determinations are settled, the calculation is largely arithmetic. Disputes do, however, arise on rate-type interpretation (alternative versus combination), on the timing of currency conversion, on the order of computation where one charge is in the base of another, and on the proper application of suspensions and exemptions. The persuasive authorities discussed below address these.

G.2 Persuasive Authority on Rate-Type Interpretation

The South African and English courts have considered the interpretation of "OR" and "AND" connectives in tariff schedules. The settled doctrine is that the connectives are operative as ordinary English: "OR" requires selection between alternatives; "AND" or "PLUS" requires combination. Where the tariff entry is ambiguous, the doctrine of contra proferentem operates against the State (the drafter of the schedule). The customs professional reading a tariff line should resolve any ambiguity in favour of the lower duty outcome — a point of practical commercial significance.

G.3 Persuasive Authority on Currency Conversion

The English Court of Appeal and various national courts have addressed the proper time for currency conversion in customs valuation. The settled doctrine is that the conversion should be performed using the rate published by the customs administration for the period during which the customs event occurs (the entry, the importation, or the assessment, depending on the statutory formulation). Use of a market rate, a forward rate, or a contractual rate that diverges from the published rate is impermissible. ZIMRA practice — using the fortnightly Rates of Exchange for Customs Purposes — is consistent with this doctrine.

G.4 The VAT Cascade

English and ECJ authority has examined the cascading effect of VAT on importation, where VAT is computed on a base that includes other duties. The doctrine is that the cascade is intentional: the VAT system operates on the duty-inclusive base by deliberate policy, and the customs professional cannot avoid the cascade by argument that it produces "double taxation". The same point operates in Zimbabwean practice under section 12A of the VAT Act.

The most damaging error in duty calculation is computing the charges in the wrong order. A customs professional who computes VAT before customs duty has computed VAT on the wrong base. A customs professional who applies a rebate before computing the underlying duty has computed the rebate on the wrong base. The order: Customs Value → Customs Duty → Surtax → Excise → VAT base → VAT → other levies → rebates — is non-negotiable.

H.2 Confusing "OR" with "PLUS"

Confusing the alternative ("OR") and combination ("PLUS") rate types is a frequent error, particularly on rates that combine ad valorem with specific elements. A rate of "40% + US$ 3/kg" is combination (apply both, add); a rate of "US$ 5/L OR US$ 10/LAA" is alternative (apply both, take higher). The customs professional must read the connector carefully.

H.3 Wrong VAT Base

A common error is computing VAT on the customs value alone, without including customs duty, surtax, and excise in the base. Section 12A of the VAT Act prescribes the duty-inclusive base, and the cascade is a deliberate feature of the system. Another common error is the reverse — computing VAT on the customs duty plus the customs value but omitting surtax or excise. The discipline is to include every element prescribed by section 12A.

H.4 Wrong Currency Discipline

Mixing USD and ZiG within a single calculation produces nonsensical numbers. The customs professional must establish the operative currency at the outset, perform any conversions using the published Rate of Exchange, and proceed in the operative currency throughout. Where dual-currency computation is required (some elements in USD, others in ZiG), the calculation should be presented in two parallel columns, not interleaved.

H.5 Failure to Identify Specific Charges

Specific levies — the AIDS levy, the carbon tax, tobacco-specific charges, alcoholic beverage levies — apply to identified tariff lines and are easily overlooked. ASYCUDA computes them automatically once the tariff line is correctly entered, but a manual computation must explicitly identify and compute each. The customs professional should consult the tariff line in ASYCUDA or in the printed Tariff Notice to identify every applicable charge.

H.6 Misapplication of the General Suspension

The General Suspension under SI 257 of 2003 covers specific goods (medicines on prescription, goods for the blind and disabled, packing containers, kerosene). Customs professionals occasionally apply the suspension to goods that resemble the listed items but are not in fact within the schedule — for example, applying the medicines suspension to over-the-counter pharmaceuticals not requiring prescription, or applying the disability suspension to assistive devices that are not specifically scheduled. The schedule must be consulted on each importation; the policy of the suspension is not the policy of generosity but of specific identified relief.

H.7 Wrong Treatment of Excise Under SADC and COMESA

Excisable goods imported from SADC and COMESA states attract specific treatment. Under SADC, where the preferential customs duty rate is lower than the local excise rate, customs duty is collected at the local excise rate. Under COMESA, the customs duty and surtax are wholly suspended (SI 244 of 2000 section 3(1)), but excise is preserved (section 3(3)). The customs professional must read the trade-agreement provisions carefully on every excisable consignment to apply the correct treatment.

H.8 Failure to Apply Rebates at the Final Step

Rebates are applied after the underlying duty calculation has been completed. The customs professional must complete the prima facie calculation first (showing customs duty, surtax, excise, VAT), then apply the rebate (reducing or eliminating each charge as the rebate provision permits). Applying the rebate too early — for example, treating the rebated goods as zero-customs-value — produces conceptually confused calculations that fail audit.

H.9 Failure to Update for Tariff Notice Amendments

Tariff rates change with each Finance Act and with periodic Tariff Notices. A calculation that uses a rate from a previous year, or that fails to apply a recent surtax adjustment, is wrong notwithstanding the elegance of its arithmetic. The customs professional must always work from the current Tariff Notice and the current Finance Act amendments.

Five questions follow. Answers and worked explanations are provided in Section J.

Question 1 (Conceptual). Explain the structure of charges payable on importation in Zimbabwe (customs duty, surtax, excise, VAT, AIDS levy, carbon tax). For each charge, identify the statutory authority and the base on which it is computed. Then explain why VAT on importation is computed on a duty-inclusive base (the cascade) and the policy rationale for that design.

Question 2 (Application — Rate Types). A consignment of imported wine attracts a rate of "US$ 4/L OR US$ 8/LAA + Excise". A consignment of imported branded shirts attracts a rate of "30% + US$ 2/kg". Explain the rate type of each, and the computational treatment that follows. Then construct a brief hypothetical for each, performing the computation in full.

Question 3 (Computational — Integrated Calculation). A Harare retailer imports a consignment of household electronics from China by air. Customs value (CIF) is US$ 60 000. The tariff line attracts 30 per cent customs duty under the general rate, no surtax, no excise. VAT at 15 per cent applies. The retailer claims no preference and no rebate. Compute the total amount payable to ZIMRA, presenting each step in tabular form, identifying the legal basis for each charge.

Question 4 (Computational:

• Preferential and Excisable). A Bulawayo wholesaler imports a consignment of beer from Botswana, qualifying as Botswana-originating under the Zimbabwe&ndash
• Botswana Trade Agreement. Customs value (CIF Plumtree) is US$ 50 000
• the consignment is 25 000 litres. The tariff line attracts 40 per cent general customs duty (free under Botswana per Article 5(1))
• 25 per cent general surtax (payable under Botswana, no preferential suspension under that bilateral)
• excise of US$ 0.20 per litre (payable under Botswana per Article 5(2)(b) at the local rate)
• 15 per cent VAT. Compute the total amount payable

Question 5 (Strategic — Decision Support). A Zimbabwean trading company is evaluating two sourcing options for a consignment of finished textiles with FOB value US$ 100 000:

• sourcing from Pakistan (non-preferential, 40% customs duty, 25% surtax, 15% VAT, freight US$ 8 000, insurance US$ 600)
• sourcing from South Africa under SADC preference (0% customs duty, 25% surtax, 15% VAT, freight US$ 1 800, insurance US$ 200). Compute the total amount payable to ZIMRA under each option, and the all-in landed cost under each option. Identify the source-of-savings under the SADC option and any strategic considerations beyond the duty calculation that would inform the decision.

J. Quiz Answers with Explanations

J.1 Answer to Question 1

The structure of charges:

• Customs duty under sections 38 and 86 of the Customs and Excise Act, computed on the customs value at the rate prescribed in the First Schedule for the relevant tariff line.
• Surtax under section 97 of the Customs and Excise Act, computed on the customs value (or such other base as the Surtax Tariff Notice prescribes) at the rate prescribed in the Surtax Tariff Notice.
• Excise duty under section 95 of the Customs and Excise Act, computed on the prescribed excise base (typically the customs value plus customs duty for ad valorem excise, or per unit for specific excise) at the rate prescribed in the Excise Tariff.
• VAT on importation under section 6(1)(b) read with section 12A of the VAT Act, computed at 15% standard (or 0% zero-rated, or exempt) on the customs value plus customs duty plus surtax plus excise plus other charges.
• AIDS levy under specific notices, computed at 3% on the prescribed base for relevant tariff lines.
• Carbon tax under specific notices, computed per litre or per tonne for fuels and certain other carbon-intensive imports.

Why VAT cascades on a duty-inclusive base. The policy rationale is that VAT is a tax on the consumer's economic burden of acquiring the goods. The economic burden includes not only the price of the goods but every cost the consumer must bear to acquire them, including the customs duties that the State imposes. By computing VAT on the duty-inclusive base, the system ensures that the VAT base reflects the real economic cost to the consumer. The cascade also produces fiscal protection: the VAT base rises with the customs duty, so an importer cannot reduce VAT exposure by manipulating the customs duty (the two are correlated). The cascade is intentional and not avoidable through argument; it is the design of the system.

J.2 Answer to Question 2

The wine rate: "US$ 4/L OR US$ 8/LAA + Excise" is an alternative rate (the connector is "OR"). The two options must be calculated separately and the higher selected. Within the second option, "+ Excise" is internal to that option and adds to it (not an additive third option to the first).

Hypothetical:

• 6 cases of wine, each with 12 bottles of 750 ml at 13% ABV. Litreage: 6 ×
• 12 ×
• 0.75 = 54 L. LAA: 54 ×
• 0.13 = 7.02 LAA. First option: 4 ×
• 54 = US$ 216. Second option: 8 ×
• 7.02 + (assume excise of US$ 4 per LAA) ×
• 7.02 = US$ 56.16 + US$ 28.08 = US$ 84.24. Higher: US$ 216 (the first option). Customs duty = US$ 216

The shirts rate: "30% + US$ 2/kg" is a combination rate (the connector is "+"). Both components are calculated and added. Hypothetical: 100 shirts, total weight 80 kg, customs value US$ 5 000. Ad valorem component: 30% × US$ 5 000 = US$ 1 500. Specific component: US$ 2 × 80 = US$ 160. Total customs duty: US$ 1 660.

The two rate types are conceptually distinct: alternative rates protect the State by ensuring the higher of two computational outcomes is collected; combination rates impose two charges that operate on different aspects of the goods (value and physical quantity).

J.3 Answer to Question 3

Customs Value (CIF)	US$ 60 000.00
Customs Duty (general, 30%, ad valorem; First Schedule)	US$ 18 000.00
Surtax (none on this tariff line)	Nil
Excise (none on this tariff line)	Nil
VAT base (section 12A VAT Act): 60 000 + 18 000	US$ 78 000.00
VAT on Importation (section 6(1)(b) VAT Act, 15%)	US$ 11 700.00
Total amount payable to ZIMRA	US$ 29 700.00

Each step is grounded in its statutory authority. The customs duty rate is found at the First Schedule for the relevant tariff line (work). The customs value is computed under sections 105 to 113 of the Customs and Excise Act (work). No preference or rebate is claimed (Modules 3 and 4 do not engage). VAT is computed under sections 6(1)(b) and 12A of the VAT Act on the customs-duty-inclusive base.

J.4 Answer to Question 4

Customs Value (CIF Plumtree)	US$ 50 000.00
Customs Duty under Botswana Article 5(1) (free)	Nil
Surtax (25% — payable under Botswana, no preferential suspension)	US$ 12 500.00
Excise: US$ 0.20 × 25 000 L (Botswana Article 5(2)(b), at local rate)	US$ 5 000.00
VAT base: 50 000 + 0 + 12 500 + 5 000	US$ 67 500.00
VAT on Importation: 15% × US$ 67 500	US$ 10 125.00
Total amount payable to ZIMRA	US$ 27 625.00

Note the contrast with a non-preferential consignment, on which customs duty would have been US$ 20 000 (40% × US$ 50 000), driving the VAT base up to US$ 87 500, the VAT to US$ 13 125, and the total payable to US$ 50 625. The Botswana preference saves US$ 23 000 in this scenario — but only on customs duty, not on surtax (which remains payable under the Botswana bilateral) or on excise (which is preserved by Article 5(2)(b)).

J.5 Answer to Question 5

Option (a) — Pakistan non-preferential.

FOB Pakistan	US$ 100 000.00
Add freight	US$ 8 000.00
Add insurance	US$ 600.00
Customs Value (CIF)	US$ 108 600.00
Customs Duty (40%)	US$ 43 440.00
Surtax (25%)	US$ 27 150.00
VAT base: 108 600 + 43 440 + 27 150	US$ 179 190.00
VAT (15%)	US$ 26 878.50
Total payable to ZIMRA — Option (a)	US$ 97 468.50
All-in landed cost — Option (a) (CV + duty)	US$ 206 068.50

Option (b) — South Africa under SADC preference.

FOB South Africa	US$ 100 000.00
Add freight	US$ 1 800.00
Add insurance	US$ 200.00
Customs Value (CIF)	US$ 102 000.00
Customs Duty (SADC preferential, 0%)	Nil
Surtax (25% — not preferentially suspended under SADC)	US$ 25 500.00
VAT base: 102 000 + 0 + 25 500	US$ 127 500.00
VAT (15%)	US$ 19 125.00
Total payable to ZIMRA — Option (b)	US$ 44 625.00
All-in landed cost — Option (b) (CV + duty)	US$ 146 625.00

Source-of-savings analysis. Option (b) produces savings of US$ 52 843.50 in duty payable to ZIMRA (US$ 97 468.50 minus US$ 44 625), or US$ 59 443.50 in all-in landed cost (US$ 206 068.50 minus US$ 146 625, including the US$ 6 000 + US$ 600 = US$ 6 600 freight and insurance saving from the shorter trade route). The savings are driven principally by:

• the elimination of customs duty under SADC preference (US$ 43 440 saved)
• the lower freight and insurance from the regional route (US$ 6 600 saved on the customs value base, with cascade effects)
• the reduced VAT base resulting from no customs duty in the cascade (US$ 7 753.50 saved on VAT). Surtax remains the same in absolute terms (US$ 27 150 vs US$ 25 500 — slightly lower under (b) because the customs value is lower).

Strategic considerations beyond the duty calculation. The SADC route also offers:

• shorter lead times (typically 7–10 days from South Africa versus 60–90 days from Pakistan), reducing inventory carrying costs and improving responsiveness to demand fluctuations
• lower freight risk (regional versus intercontinental supply)
• currency-matching opportunities (South African production may invoice in ZAR with hedging options not available against Pakistan PKR); (iv) regulatory coherence (SADC standards alignment reduces compliance friction); and (v) supplier diversity (a regional supplier may be more responsive to specifications and quality issues). Against these, the SADC option may face:

• limited capacity in South African textile production
• potentially higher unit costs (South African production may be more expensive per unit at FOB even after preference)
• origin-compliance burden (the South African supplier must be a registered preferential exporter and the SADC origin rules must be satisfied for woven garments — a potentially stringent test under the Section XI textile rules examined in and Module 3). The decision is therefore not exclusively duty-driven; the comprehensive landed-cost-and-strategy analysis informs the commercial choice.

K. Key Takeaways

• This lesson is the integrative capstone: it teaches the customs professional to combine the four pillars (classification, valuation, origin, rebates) into a single computational chain producing the total amount payable to ZIMRA.
• The structure of charges payable on importation comprises customs duty (section 86), surtax (section 97), excise (section 95), VAT on importation (section 6(1)(b) and 12A VAT Act), AIDS levy, carbon tax, and specific levies. Each has a distinct statutory anchor and a distinct base.
• The order of computation is non-negotiable: Customs Value → Customs Duty → Surtax → Excise → VAT base → VAT → other levies → rebates → Total payable.
• The four rate types are ad valorem (percentage of customs value), specific (per unit of measurement), alternative ("OR" — calculate both, take higher), and combination ("PLUS" — calculate both, add).
• VAT on importation cascades: the VAT base includes customs duty, surtax, and excise. A change in any upstream charge produces a change in the VAT base and therefore in the VAT.
• The General Suspension Regulations (SI 257 of 2003) suspend customs duty on specified goods (medicines on prescription, goods for blind/disabled, packing containers, kerosene) unconditionally. Preferential suspensions operate under the trade agreements with varying scope.
• Excisable goods under SADC pay customs duty at the local excise rate where this is higher than the SADC preferential rate. Under COMESA (SI 244 of 2000), customs duty and surtax are wholly suspended on COMESA-originating goods, but excise is preserved (section 3(3)).
• Rebates are applied after the underlying duty calculation. A rebated consignment may have customs duty, surtax, excise, and VAT all rebated (Total Rebate scenario) or only some rebated (partial scenario). The scope of relief is fixed by the specific Regulation.
• The multi-currency system distinguishes USD-payable from ZiG-payable goods under SI 252A of 2018 (as amended). Currency conversion uses the ZIMRA Rates of Exchange for Customs Purposes for the relevant period, with the date of importation determining the operative rate (section 17 Customs and Excise Act).
• ASYCUDA World automates the calculation, but the customs professional must do the analytical work first: ASYCUDA computes correctly only on correct inputs.
• Common pitfalls — wrong order of computation, confusing "OR" with "PLUS", wrong VAT base, wrong currency discipline, missed specific charges, misapplied General Suspension, wrong excise treatment under SADC and COMESA, premature rebate application, and outdated rates — account for the bulk of post-clearance audit findings on calculation matters.
• Mastery of concludes the -foundation sequence. The customs professional who has worked through Modules 1 to 5 has the analytical framework to handle any duty calculation arising on a Zimbabwean importation. (Modules 6 to 10 and 18) translates this framework into the specific operational pathways by which goods enter Zimbabwe — by motor vehicle, by rail, by air, by post, and by traveller.