What will your Corporation Tax be?
Enter your expected profit and the calculator applies the current rates, including marginal relief. Your figures stay on this page.
Your estimated Corporation Tax
FY 2026-27 rates · 12 month period- Taxable profit
- £120,000
- Rate band
- Marginal relief band
- Tax at main rate (25%)
- £30,000
- Marginal relief
- −£1,950
- Estimated Corporation Tax
- £28,050
- Effective rate
- 23.4%
An estimate from the figures you entered, using the rates for financial year 2026-27. Reliefs, losses and adjustments will change it. It is confirmed only by a prepared computation.
Our clients watch this number move all year. Their records are maintained daily, so the estimate updates itself and the year-end bill is never news. If that is worth having, request a quote. If you only needed the number, you have it.
The rates behind the result
Profits up to £50,000 are taxed at the small profits rate of 19%. Profits above £250,000 are taxed at the main rate of 25%. Between the two, tax is charged at 25% less marginal relief of 3/200ths of the difference between £250,000 and your profit.
Both thresholds are divided by one plus your number of associated companies and prorated for accounting periods shorter than twelve months. That is why two £40,000-profit companies under common control do not both pay 19%.
To see when the tax is due and when the return must be filed, use the Corporation Tax deadline calculator. If the company spends on research and development, the R&D tax relief calculator estimates the credit.