Launching December 2026

Free UK business tax calculators that show their working

Clear, accurate calculators for limited companies, directors and the self-employed, built on HMRC rates and rules, with every step of the calculation explained.

Corporation tax calculator

Including marginal relief, associated companies and short periods.

Dividend tax calculator

See the tax on your dividends for each tax year.

Salary vs dividend calculator

Find a tax-efficient mix of salary and dividends.

Employer cost calculator

Employer National Insurance and the true cost of hiring.