Corporation tax calculator

Enter your company's taxable profits to see the corporation tax due, the marginal relief if it applies, and the effective rate. You can change the length of the accounting period and the number of associated companies.

Corporation tax

£0.00

Effective rate 0.00%

Your details

Taxable profits

Dividends from non-group companies

Length of accounting period in days

Associated companies

Corporation tax calculation
Taxable profits	£0.00
Dividends from non-group companies	£0.00
Amount used to choose the rate	£0.00
Rate that applies	Small profits rate
Marginal relief	£0.00
Corporation tax	£0.00

How this was worked out

The amount used to choose the rate is taxable profits plus dividends: £0.00 + £0.00 = £0.00.
For this accounting period and associated-company count, the lower limit is £50,000.00 and the upper limit is £250,000.00.
Tax: £0.00 × 19% = £0.00.

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What the calculator assumes

The profits you enter are already taxable profits: after allowable expenses, capital allowances and any losses brought forward.
The whole accounting period falls in financial years with the same rates and limits.
The company is not a close investment-holding company and has no ring-fence profits from oil and gas.
Tax is rounded to the penny once, at the end.

The rates

Companies with profits of £50,000 or less pay the small profits rate of 19%. Companies with profits over £250,000 pay the main rate of 25% on all of their profits.

Between those limits, the company pays the main rate and then takes off marginal relief. The relief is largest just above the lower limit and falls to nothing at the upper limit. The result is that the tax on each extra pound of profit in that range is higher than the main rate, while the average rate climbs gradually from the small profits rate to the main rate.

Short periods and associated companies

The two limits are for a 12-month accounting period. For a shorter period they are cut in proportion to the number of days. A company with a six-month first period, for example, reaches the main rate at about half the usual profit.

The limits are also shared between associated companies. Two companies are associated if one controls the other, or the same people control both. If your company has one associated company, each company's limits are halved. If it has three, they are divided by four. Dormant companies usually do not count.

Dividends from other companies

Dividends that your company receives from companies outside its group are not taxed as profit. They are added to profits to decide which rate applies, though, so they can push a company into marginal relief or the main rate. Enter them in the calculator if your company has them.

What it leaves out

Working out taxable profit from your accounts. The calculator starts from the taxable figure.
Periods that span a change in rates, and periods longer than 12 months, which are split into two for tax.
Group relief, research and development relief, and quarterly instalment payments for large companies.

If you pay yourself from the company, the dividend tax calculator shows the personal tax on dividends, and the take-home pay calculator covers a salary. Contractors can compare working inside and outside the rules with the IR35 calculator.

Official guidance

Rates for Corporation Tax on GOV.UK
Corporation Tax: marginal relief on GOV.UK
Corporation Tax on GOV.UK

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Email [email protected]. Tell us what you entered and what you expected to see. Fixed errors are listed on the corrections page.