Corporation Tax calculator

Put in your company profit and see the Corporation Tax on it, which rate applies, and what marginal relief is worth if your profit falls between the limits.

Your figures

Taxable profit for the period

Profit after allowable expenses and capital allowances.

Rates for Corporation Tax rates are set by financial year from 1 April. They are the same for both years shown.

Associated companies, including this one The £50,000 and £250,000 limits are divided by the number of associated companies.

How that figure is reached

Where your profit sits

What the company keeps

Profit after tax Corporation Tax

How Corporation Tax works

There are two rates. Profits up to the lower limit are taxed at the small profits rate. Profits at or above the upper limit are taxed at the main rate on the whole amount. In between, the main rate applies and is then reduced by marginal relief, which is why the effective rate climbs gradually rather than jumping.

Inside the marginal relief band every extra £1 of profit is taxed at 26.5 per cent, higher than the main rate itself. That is worth knowing before you decide the timing of income or a year-end purchase.

If you control more than one company, the limits are shared between them. Two associated companies means the small profits rate stops at £25,000 each rather than £50,000.