Tax calculator
Corporation Tax Calculator
Estimate your limited company's Corporation Tax bill at 2026/27 rates, including marginal relief, and see how profit bands change what you pay.
Rates checked 17 July 2026
| Turnover | £180,000 |
| Allowable expenses | −£90,000 |
| Taxable profit | £90,000 |
| Rate bandEffective rate 22.3% | Marginal relief band |
| Corporation Tax due | £20,100 |
2026/27 rates: 19% small profits rate up to £50,000 profit, 25% main rate above £250,000, with marginal relief tapering the rate between the two (thresholds are divided between associated companies). Excludes R&D relief, capital allowances beyond what you've entered as expenses, and other reliefs a return would include. Guidance only — not tax advice.
Figures use published 2026/27 UK tax rates and are simplified estimates for guidance only — not tax, accountancy, or financial advice. Your actual liability depends on your full circumstances; confirm withGOV.UK or a qualified accountant before acting.