Corporation Tax Calculator 2026
Estimate Corporation Tax on taxable company profits using the current 2026 rates.
Estimate Corporation Tax on taxable company profits.
Use the calculator below to create a quick planning estimate based on the figures you enter. Results are for guidance and should be checked against current UK tax rules and HMRC guidance where appropriate.
Corporation Tax Calculator 2026
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Estimate Corporation Tax on taxable company profits.
The 19% small profits rate applies at £50,000 or less and the main rate is 25% above £250,000. Profits between those figures require Marginal Relief, so the calculator flags that range rather than pretending a simple rate is exact.
How to use this calculator
Enter the figures that best match your situation and select the calculation button. The result is intended as a useful planning estimate rather than a substitute for a tax return or professional advice.
Keep your figures up to date when tax rates, thresholds, costs or business circumstances change.
Frequently Asked Questions
What does the Corporation Tax Calculator calculate?
It provides an estimate of Corporation Tax based on taxable company profit.
What Corporation Tax rates are used?
The calculator uses the 19% small profits rate up to £50,000 and the 25% main rate above £250,000. Profits between those limits can be subject to Marginal Relief.
Does it calculate Marginal Relief exactly?
No. The calculator flags the £50,000 to £250,000 range rather than presenting a simplified calculation as an exact tax liability. Associated companies and accounting-period rules can affect the thresholds.
Is Corporation Tax charged on turnover?
No. Corporation Tax is generally based on taxable profits rather than simply the company’s sales or turnover. Allowable expenses and tax adjustments affect the taxable figure.
Can I use this result for my company accounts?
Use it as a planning estimate only. Company accounts and Corporation Tax returns should use the company’s actual accounting and tax figures.
Important information
This calculator provides an estimate for general planning and educational purposes. It is not a tax return, accounting record or personalised professional advice. Tax rules, rates and thresholds can change, and individual circumstances can affect the result.