Free UK Tax Calculators — 2025/26
8 specialist calculators for company directors, landlords, employees, and contractors. Live results, visual breakdowns, and scenario comparisons.
Capital Gains Tax Calculator
Calculate your capital gains tax on property, shares, and other assets. Includes annual exemption, Business Asset Disposal Relief (BADR), and tax year comparison. Covers residential and non-residential property.
Dividend Tax Calculator
Work out your dividend tax and compare salary vs dividend splits for company directors. See how the dividend allowance and your income tax band affect your total tax bill.
Company Car Tax Calculator
Calculate Benefit in Kind (BIK) tax on company cars. Compare EV vs petrol vs diesel tax savings, and see whether a car allowance would leave you better off.
Corporation Tax Calculator
Calculate corporation tax with marginal relief for profits between £50,000 and £250,000. See your effective tax rate and how associated companies affect your calculation.
Salary Sacrifice Calculator
See the real cost of salary sacrifice for pensions, electric vehicles, cycle to work, and childcare schemes. Includes employer NI savings calculation.
Rental Income Tax Calculator
Calculate tax on rental income including Section 24 mortgage interest restriction. See the impact on your total tax bill as a landlord with multiple properties.
Commercial Stamp Duty Calculator
Calculate SDLT on commercial property purchases and leases. Covers mixed-use properties, lease duty calculations, and linked transactions.
IR35 Calculator
Compare take-home pay inside vs outside IR35 for contractors. See the real financial impact of an IR35 determination on your annual earnings.
About our tax calculators
Every TaxBase calculator uses published HMRC rates and thresholds for the 2025/26 tax year. Results update live as you type, and each calculator includes visual breakdowns so you can see exactly where your money goes.
Our calculators are designed for real UK taxpayers: company directors optimising salary and dividend splits, landlords navigating Section 24, employees weighing up company car tax, and contractors comparing inside vs outside IR35.
Need more context before you calculate? Browse our in-depth tax guides for detailed explanations of rates, reliefs, and reporting deadlines. Each guide links directly to the relevant calculator so you can go from learning to doing in one click.
All calculators are free, require no sign-up, and do not store your data. They are designed to give you a quick estimate — for complex situations, always consult a qualified accountant or tax adviser.