We'd love to hear from you — especially if you've spotted a way to make a calculator more accurate.
For corrections, feedback, questions or partnership enquiries, email us at:
Reporting a wrong figure — what helps most
Accuracy is the whole point of WorldTax, and a correction is genuinely more useful to us than a compliment. Reports that include the following get fixed fastest, because they let us go straight to the primary source rather than guessing what you were looking at:
- Which calculator and country — the page URL is ideal.
- The figure you entered and the result you got.
- What you expected instead, and where that expectation comes from — your payslip, your tax return, or an official calculator.
- A link to the official source if you have one. This is the single most helpful thing you can include: it lets us verify against the authority itself rather than debating.
- The tax year, if the calculator offers a choice. Rates change and a mismatch is often a year mismatch.
When we confirm an error against the primary source, we correct it and update the last-updated date shown at the top of that country's pages, so the change is visible rather than silent. Our full checking process is described in the methodology.
What we can and cannot help with
Being clear about the boundary saves everyone time:
- We can explain how a calculator arrives at its number, point you at the official source behind a rate, fix errors, and take requests for countries or calculators to add.
- We cannot advise on your personal tax position, review your return, tell you which option is better for your circumstances, or act for you with any tax authority. We are an independent information service and hold no tax qualification in any jurisdiction. For advice, contact your tax authority or a qualified professional in your country.
Who you are writing to
WorldTax is run by Hyunwook Sohn, operating as a registered sole proprietorship in the Republic of Korea (business registration 671-53-00088). It is a one-person project, so replies come from a person rather than a support queue — and that also means we read every message but cannot always answer quickly. Genuine enquiries and error reports get priority.
For press, partnership or licensing enquiries, use the same address and say so in the subject line.