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Corporation Tax
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Get a quick estimate of your company's Corporation Tax bill, effective rate and profit left after tax.
£
This is your profit for Corporation Tax purposes after allowable business expenses and relevant tax adjustments. If you only know your accounting profit, the result may be less accurate.
Rates used (financial year 2026): small profits rate 19.0%, main rate 25.0%, Marginal Relief between £50,000 and £250,000 with a standard fraction of 3/200. Last reviewed 23 October 2026.
Estimated Corporation Tax
Enter your taxable profit to see an estimate.
Limitations. This is an estimate for ordinary UK limited companies and does not cover ring fence profits. Losses, capital allowances, chargeable gains, group arrangements, associated company rules, dividends received and other tax adjustments can all change the actual Corporation Tax calculation. Periods spanning two financial years with different rates are not split.