Calculators

What each calculator answers

Key dates shows when a new company's first accounts, confirmation statement and Corporation Tax are due, from its date of incorporation. It works the dates out from the published rules and runs without JavaScript.

Late filing penalty tells a director what the registrar will charge when company accounts arrive late. It uses the registrar's published penalty scale for private and public companies, including the doubling that applies when accounts were also late the year before.

Stamp duty works out Stamp Duty Land Tax on a home in England or Northern Ireland, using HMRC published rates for 2026/27, with first-time buyer relief and the 5% surcharge on additional properties. It is for buyers and landlords budgeting before an offer.

Take-home pay turns a gross salary into yearly, monthly and weekly net pay after income tax and employee National Insurance for 2026/27. It suits employees and directors setting a salary.

Salary vs dividend compares paying yourself from a limited company as salary or as dividends, including Corporation Tax, employer and employee National Insurance and dividend tax, for a one-person company.

Common questions

Are the calculators free?

Yes. There is no sign-up, the sums run in your browser, and we do not record the figures you type.

Which tax year do they use?

2026/27, the tax year from 6 April 2026 to 5 April 2027. The figures are reviewed every April when new rates take effect.

Is this tax advice?

No. The calculators give estimates from published rates for common situations. For your own position, check gov.uk or speak to an accountant.