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Corporation Tax Calculator 2025/26
Calculate UK corporation tax including marginal relief for profits between £50k-£250k.
£
£
Corporation Tax
£20,500
After Tax
£79,500
Effective Rate
20.5%
Marginal Relief
Corporation Tax Rates 2025/26
£0 – £50,00019%Small Profits
£50,001 – £249,99919-25%Marginal Relief
£250,000+25%Main Rate
Note: Limits are divided by the number of associated companies. Two companies = £25k small profits limit each.