Contact
Every message is read by a person. Replies usually come within a few days.
What can we help with?
Report a wrong figure
A rate, threshold or result doesn’t match your payslip or an official source. This is the most useful message you can send.
Report a figure →Request a country
Tell us which country you’d like next. Requests decide which calculators get built first.
Request a country →Anything else
Questions about privacy or the terms, translations, or working together.
Ask a question →Reporting a wrong figure
Tax rules change often, and a clear report lets us check and fix a calculator quickly. Please include:
- the calculator page (a link is enough) and whether you used the local or English version,
- the gross or net amount you entered and any options you chose (tax class, children, city, age…),
- the result you saw and the result you expected,
- where the expected figure comes from: a payslip, an official calculator or the law itself.
The “Report a figure” button above opens an email with these questions already filled in.
Your privacy: the calculators run entirely in your browser — nothing you type into them is sent to us. We only see what you choose to put in an email.
Please note
We can’t give personal tax, legal or financial advice or review individual payslips beyond checking a reported calculator error. For your own situation, contact your employer’s payroll department, a tax adviser or the tax authority in your country. See the Disclaimer for details.