Free UK Tax Calculators 2026/27

Salary after tax and National Insurance: annual, monthly and weekly.

Calculate CT at 19% or 25% with marginal relief for 2026/27.

How much tax you owe on dividends from your company, by rate band.

Annual income from shares: enter share count, price and yield.

Inside vs outside IR35 take-home comparison, see the annual saving.

Deemed salary breakdown: employer NI, income tax and employee NI.

BIK tax on company car by CO2 emissions and P11D list price.

Tax on any employer-provided benefit using its P11D value.

UK PayPal transaction fees for sellers and freelancers.

eBay final value fees, insertion fees and net profit after fees.

Monthly repayments, total cost and APR for UK car finance.