Corporation Tax Calculator
Calculate your company’s Corporation Tax liability including marginal relief
Company Details
Corporation Tax
£0
Effective rate:
0.0%
Profit after tax
£0
| Taxable profit | £0 |
| Corporation Tax (at main rate) | £0 |
| Marginal relief | −£0 |
| Small profits limit | £50,000 |
| Main rate limit | £250,000 |
Profits up to £50,000 are taxed at 19% (small profits rate).
Profits above £250,000 are taxed at 25% (main rate).
Between these limits, marginal relief applies.
Frequently Asked Questions
What is the current UK Corporation Tax rate?
From April 2023, the main Corporation Tax rate is 25% for profits above £250,000. Companies with profits of £50,000 or less pay the small profits rate of 19%. Between these thresholds, marginal relief reduces the effective rate gradually from 25% to 19%.
What is marginal relief?
Marginal relief is a mechanism that gradually increases the effective Corporation Tax rate from 19% to 25% for companies with profits between £50,000 and £250,000. It prevents a cliff-edge where a small increase in profit would cause a large jump in tax.
How do associated companies affect Corporation Tax?
The £50,000 small profits limit and £250,000 main rate limit are divided equally between associated companies. For example, with 2 associated companies, the small profits limit becomes £25,000 each and the main rate limit becomes £125,000 each.
When is Corporation Tax due?
Corporation Tax is normally due 9 months and 1 day after the end of your company’s accounting period. Large companies (profits above £1.5 million) must pay in quarterly instalments.