Corporation Tax calculator
Enter company profit to estimate Corporation Tax and any marginal relief.
Before you start: Use this for a UK-resident company with ordinary profits and an accounting period of up to 12 months. Taxable and augmented profits are treated as equal. It leaves out distributions, ring-fence profits, close investment-holding companies, special rates and loss relief. Check which associated companies count before entering them.
Enter your figures
Your calculation
| Corporation Tax | £22,750.00 |
|---|---|
| Marginal relief | £2,250.00 |
| Profit after this tax | £77,250.00 |
| Small-profits limit | £50,000.00 |
| Main-rate limit | £250,000.00 |
Check your result
Results update as you type. Check the figures against your records and read the limits above. The calculator cannot tell you whether you qualify for a tax relief or complete a tax return for you.
Official guidance
Read the rules for this calculation. Source checked 23 October 2026. Amounts are in pounds. Rates are for 2026/27 unless the page gives a different date.
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