Enter the company's taxable profit to see its Corporation Tax for an accounting period starting 1 April 2026, with marginal relief, a short period and associated companies taken into account. Nothing is saved, and you don't need an account.
Between the limits, each extra £1 of profit is taxed at 26.5%.
Search the Companies House register. Your company page shows every date that applies to it, and what to file next.
19% on profits up to £50,000, 25% over £250,000, and marginal relief in between, so the rate rises gradually.
Companies under the same control. The £50,000 and £250,000 limits are divided between them.
9 months and 1 day after the end of the accounting period, for a company with profits up to £1.5 million. The Company Tax Return itself is due 12 months after the period ends.
How we wrote this. Drafted with AI assistance from the sources above. Every fact was then checked against GOV.UK, legislation.gov.uk and HMRC’s manuals, last on 24 October 2026. It is general information, not advice on your own situation. Editorial policy