Corporation Tax Calculator 2025/26
Calculate Corporation Tax for UK limited companies. Covers small profits rate, marginal relief and main rate.
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Associated companies reduce small profits and marginal relief thresholds
2025/26 Corporation Tax Rates
Small Profits Rate (19%)Up to £50,000
Marginal Relief£50,001 – £250,000
Main Rate (25%)Over £250,000
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Enter your company profits to calculate Corporation Tax.
Disclaimer: Tools and content provided are free for general guidance only and not a substitute for personalised professional advice. we strongly recommend to take professional advice from Tax Advisor practising in UK to help you in any decision making. You are free to share this guide to them
Estimates only. Always seek professional tax advice. Updated for 2025/26.