UK Corporation Tax Calculator (2026-27)
Enter your taxable company profit to estimate Corporation Tax. The calculator handles the small profits rate (19%), the main rate (25%), and marginal relief in the £50,000-£250,000 transition band.
Tax year: 2026-27 · Last reviewed: 30 April 2026 · Source: GOV.UK Corporation Tax rates
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Your estimate
Corporation Tax estimate
Profit after Corporation Tax
£66,225
From £85,000 taxable profit
Of your taxable profit:
Ignores short accounting periods, reliefs, losses, R&D, and ring fence profits. If your company has associated companies, the £50k and £250k thresholds are divided between them. This calculator provides a broad estimate only and is not tax advice.
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What this calculator does
It estimates Corporation Tax for UK company profits using the small profits rate, main rate, marginal relief, and the associated-company adjustment to the profit limits.
What it does not include
It does not prepare a company tax return or account for losses, R&D relief, capital allowances, close-company loans, quarterly instalments, or sector-specific regimes.
Official source reference
The rates and marginal relief bands are based on GOV.UK Corporation Tax rates. Companies with associated companies should confirm the divided limits with their accountant.