Corporation Tax Calculator
Calculate your company’s corporation tax liability for the 2025/26 tax year, including marginal relief for profits between £50,000 and £250,000.
Company Profits
Based on 2025/26 corporation tax rates. This calculator assumes a single company with no associated companies. Thresholds are divided by the number of associated companies plus one. For personalised advice, please book a free consultation.
Tax Breakdown
Profit After Tax
£77,250
£6,438/month
Profit Breakdown
2025/26 Corporation Tax Rates
| Band | Annual Profits | Rate |
|---|---|---|
| Small Profits Rate | Up to £50,000 | 19% |
| Marginal Relief | £50,001 — £250,000 | Between 19% and 25% |
| Main Rate | Over £250,000 | 25% |
Marginal relief gradually increases the effective rate from 19% to 25% for profits between £50,000 and £250,000. The formula reduces the main rate charge by (upper limit - profits) x 3/200.
Need help with your corporation tax?
Our chartered accountants can help you minimise your corporation tax liability through legitimate tax planning, R&D claims, capital allowances, and more. Book a free consultation to discuss your company’s situation.
Book Free Consultation