Free UK CIC Tax Tool

Community Interest Company (CIC) Corporation Tax Calculator

Work out your CIC's Corporation Tax in seconds. Enter your profit, disallowed expenses and capital allowances to see your taxable profits, the tax due at the 19% small profits rate, the 25% main rate, or marginal relief between £50,000 and £250,000 — adjusted for associated companies.

CIC Corporation Tax Calculator

Enter your figures below. Your results update automatically as you type — no buttons to press and nothing to submit.

Enter Your Figures

£

Net profit before tax from your statutory accounts.

Add Back (Disallowed Expenses)
£
£
£
£
£
£

e.g. bank interest, rental income. (Dividends received are generally exempt — see the notes below.)

Deductions
£
£

Associated companies share the profit thresholds. This figure includes your own company.

Tax Calculation Results

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This calculator gives an estimate only and is not tax advice. It applies the HMRC Corporation Tax rates for financial years starting 1 April 2023 (19% small profits rate, 25% main rate and marginal relief at 3/200), which remain unchanged. Rates last reviewed September 2026.

How CIC Corporation Tax Works

Since April 2023, UK Corporation Tax depends on the level of a company's taxable profits. The same rules apply to Community Interest Companies, which pay Corporation Tax on any taxable profits just like an ordinary limited company. The rates below are those published by HM Revenue & Customs.

19%

Small Company Rate

Companies with taxable profits up to £50,000 (adjusted for associated companies).

Marginal

Marginal Relief

Profits between £50,000 and £250,000 (adjusted thresholds) receive marginal relief, giving an effective rate between 19% and 25%.

25%

Main Rate

Companies with taxable profits of £250,000 and above (adjusted for associated companies).

Associated Companies

Where a company has one or more associated companies, the £50,000 and £250,000 thresholds are divided by the total number of associated companies plus one.

Total companies Small profits rate applies up to Main rate applies from
1 £50,000 £250,000
2 £25,000 £125,000
3 £16,667 £83,333
4 £12,500 £62,500
5 £10,000 £50,000

What counts as taxable profit?

Corporation Tax is charged on your company's taxable total profits, not simply the profit shown in your accounts. The main adjustments are:

  • Add back disallowed expenses such as client entertainment, depreciation, disallowed donations, penalties and fines, which reduce accounting profit but are not tax deductible.
  • Deduct capital allowances such as the Annual Investment Allowance (AIA) and Full Expensing, together with trading losses brought forward, in place of depreciation.
  • Include non-trading income such as bank interest and rental income. Dividends received from other companies are generally exempt.

Source: Corporation Tax rates and marginal relief as published by HM Revenue & Customs, including the marginal relief fraction of 3/200 (HMRC Company Taxation Manual). Rates apply from 1 April 2023 and remain current. Last reviewed September 2026.

Worked Example: CIC Corporation Tax

Here is how the calculation works for a typical CIC with no associated companies, trading profit and some disallowed expenses.

The figures

  • Profit as per accounts£100,000
  • Add back: client entertainment£2,000
  • Add back: depreciation£8,000
  • Less: capital allowances−£10,000
  • Associated companies1 (none)

The calculation

  • Taxable total profits£100,000
  • Corporation tax at 25%£25,000
  • Less: marginal relief−£2,250
  • Corporation tax due£22,750
  • Effective rate22.75%

How the marginal relief is worked out: the formula is (upper limit − profits) × marginal relief fraction (3/200). Here that is (£250,000 − £100,000) × 0.015 = £2,250. This is then deducted from the tax at the main rate to give the final liability.

CIC Corporation Tax Calculator: FAQs

Quick answers to the questions CIC directors ask us most often about Corporation Tax.

Related CIC Tax Guides & Services

Once you have estimated your Corporation Tax, these specialist guides and services will help you understand your CIC's tax position and stay compliant with HMRC and Companies House.

Need help with your CIC's Corporation Tax?

Our specialist CIC accountants can prepare your annual accounts, calculate your Corporation Tax position and file your CT600 with HMRC accurately and on time. Fixed, no-obligation fees.