Tax Calculator
Corporation Tax Calculator
2025/26 · Small profits rate, main rate & marginal relief
Company Details
Profit before corporation tax, after director salary & allowable expenses
2025/26 CT Rates
Up to £50,00019% (small profits rate)
£50,001–£249,999Marginal relief applies
£250,000+25% (main rate)
Results
Enter your company's taxable profit to calculate corporation tax.
Assumes a single company with no associated companies. Marginal relief is calculated using the standard fraction of 3/200. For full CT600 preparation and filing, speak to our team.