Corporation Tax Calculator
Estimates UK corporation tax obligations on business profits
Taxable profits for the financial year
UK Corporation Tax Rates
Enter annual profits to calculate corporation tax
Your effective tax rate as a percentage
Profits remaining after corporation tax
Frequently Asked Questions
What is the UK corporation tax rate?
From April 2023, the main rate is 25% for profits over 250,000. Small profits rate is 19% for profits up to 50,000. Marginal relief applies between 50,000 and 250,000, creating an effective rate between 19% and 25%.
When is corporation tax due?
Corporation tax is due 9 months and 1 day after the end of your accounting period. Companies with profits over 1.5 million must make quarterly installment payments. The company tax return (CT600) is due 12 months after the accounting period end.
What can I deduct from corporation tax?
Allowable deductions include staff costs, office costs, travel expenses, stock and materials, financial costs, marketing, and capital allowances on equipment. Directors' salaries are deductible but dividends are not, as they are paid from post-tax profits.
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