Corporate Income Tax & QPD Calculator
Compute corporate income tax at 24.72% (24% + 3% AIDS levy), then map it to the four Quarterly Provisional Date instalments under s.72 of the Income Tax Act.
Profit and year-end
Enter your projected taxable income for the year, then the year-end month so we can date the QPDs.
Mining and special-mining lease companies have their own rates (15% / 25% / lease rates). This calculator uses the standard 24% corporate rate; switch to the manual override below if you operate under a special regime.
Step-by-step walkthrough
Adjust accounting profit to taxable income
Add back disallowed expenses (entertainment in part, donations beyond limits, depreciation), deduct capital allowances (SIA / wear & tear), bring in s.16 deductions.
Apply the headline rate
Standard corporate rate is 24% on taxable income. Apply specials only where they fit (mining, BOOT, IPEC-licensed insurers, etc.).
Add the AIDS levy
3% of corporate tax (not of income) gives the levy. Effective rate becomes 24 × 1.03 = 24.72%.
Schedule the QPDs
Apply the 10/25/30/35 split across QPD1–QPD4. The dates land on the 25th of the third month before each quarter-end (for a December year-end: 25 Mar, 25 Jun, 25 Sep, 20 Dec).
Reconcile on the ITF12C
File the corporate return four months after year-end. Pay any balancing tax with the return, claim refund of overpaid QPDs.
QPD splits — section 72
| QPD | Cumulative | Instalment |
|---|---|---|
| QPD 1 — 25th of 3rd month after y/e start | 10% | 10% |
| QPD 2 — 25th of 6th month | 35% | 25% |
| QPD 3 — 25th of 9th month | 65% | 30% |
| QPD 4 — 20th of last month | 100% | 35% |
Statutory anchors
- Income Tax Act [Chapter 23:06] — s.14 (rate), s.72 (provisional tax)
- Finance Act 2026 — current corporate rate and AIDS levy
- ITF12C — corporate income tax return