Corporation Tax calculator
Uses the 19% small-profits rate, 25% main rate and marginal relief between £50,000 and £250,000.
Estimated Corporation Tax£22,750.00Average rate: 22.75%. Marginal rate: 26.5%.
Free UK tax calculators · 2026/27
UK tax calculators for company directors and self-employed professionals
Estimate Corporation Tax, VAT and Self Assessment using 2026/27 rates for initial UK tax planning.
Instant estimates
Calculate common UK business and personal taxes
VAT calculator
Add or remove the standard 20% UK VAT rate from a price.
Calculated amount£1,200.00Includes £200.00 VAT.
Self Assessment Income Tax calculator
Estimate Income Tax and Class 4 National Insurance for England, Wales and Northern Ireland.
Estimated amount remaining£13,403.00Income Tax £11,432.00 + Class 4 NI £1,971.00.
Important: Estimates only. Results exclude specialist income, reliefs and payments on account. Corporation Tax thresholds may reduce for associated companies or short periods. Obtain advice before acting.
2026/27 planning points
Understand the rate behind the result
26.5% marginal rate: each additional £1 of profit in the £50,000–£250,000 relief band can add 26.5p of Corporation Tax.
Capital allowances: main-pool writing-down allowances reduce to 14% from April 2026, affecting taxable profit before this estimate.