Contact & calculation feedback
Questions, feedback or a calculation that does not look right? Here is how to reach us.
Get in touch
Found a problem with a calculation? Tell us which page you used, the tax year and country you chose, and what happened. Rounded example figures are usually enough.
Email [email protected]. The link opens your email app, where you can check your message before sending it.
Please leave out payslips, National Insurance numbers, bank details, passwords and HMRC login details.
About the calculatorsSources: HMRC Income Tax rates, employee NI rates and Scottish Income Tax. Checked 23 October 2026. For help with your own tax or debts, speak to HMRC, payroll or an adviser.