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Corporation Tax Calculator

Calculate corporate income tax for UK, US, Ireland, Germany, Singapore, Australia, or a custom rate — showing net profit after tax and effective rate.

Country / jurisdiction

UK: 19% (profits ≤ £50k), 25% (profits ≥ £250k), marginal relief in between.

Taxable profit (£)

Allowances / reliefs (£) optional

⚠️ Please fill in all required fields with valid numbers.

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Everyday Uses

Company profit planning

Estimate the corporate tax bill on projected profits before committing to spending plans.

Setting aside reserves

Small companies can ring-fence the right amount for tax through the year instead of scrambling.

Structure decisions

Compare operating as a company versus sole trader once corporate tax enters the picture.

Dividend planning

Know post-tax profit before deciding what's available to distribute.

Carrying losses forward

A loss-making year can usually be offset against future profits, so this year's loss reduces next year's bill. Worth modelling before writing a bad year off entirely.

Salary, dividend or retained profit

How money leaves a company changes the total tax paid across the company and the individual. The comparison only makes sense when both halves are calculated together.

Frequently Asked Questions

What is the UK Corporation Tax rate in 2024?

UK Corporation Tax 2024: 25% main rate for profits ≥ £250,000. Small Profits Rate of 19% for profits ≤ £50,000. Marginal relief gradually increases the effective rate from 19% to 25% between £50,000 and £250,000. The formula: tax = profits × 25% − marginal relief fraction × (£250,000 − profits).

What is the US corporate income tax rate in 2024?

The US federal corporate tax rate is a flat 21% (set by the 2017 Tax Cuts and Jobs Act). State corporate taxes range from 0% (Nevada, Wyoming) to 11.5% (New Jersey), averaging about 4%. The combined federal + state effective rate is typically 25–28% for most US companies.

What is the corporate tax rate in Ireland and why is it so popular?

Ireland applies a 12.5% corporation tax rate on trading (active business) income — one of the lowest in the EU, which has attracted major tech and pharmaceutical companies. A 25% rate applies to passive income. Ireland has agreed to implement the OECD 15% global minimum tax for large multinationals from 2024.

What is the difference between accounting profit and taxable profit?

Accounting profit is calculated per accounting standards (GAAP/IFRS). Taxable profit is adjusted for tax purposes: depreciation is replaced by capital allowances, certain expenses are disallowed (entertainment, fines), and timing differences arise from stock valuation and provisions. Corporation tax is calculated on taxable profit, not accounting profit.

What is the global minimum corporate tax and who is affected?

The OECD Pillar Two global minimum tax requires large multinationals (€750M+ revenue) to pay at least 15% tax in each country they operate from 2024. If a jurisdiction charges less than 15%, the parent company's home country can "top up" the tax. This aims to reduce profit shifting to low-tax jurisdictions.