Contact

To report a calculation error, tell us about a changed tax or insurance rate, suggest a new tool or quiz, ask about ads or partnerships, or anything else, please use the method below. We usually check within a few days, and when an error is confirmed we fix it right away and note the date of the fix on the tool or article.

Contact us through GitHub Issues

This is the fastest way and leaves a record. Anyone with a GitHub account can open an issue, and you can follow the progress in public. English or Korean is fine.

Open an issue ↗

What you can contact us about

• Calculation errors — when a result differs from your pay slip, a bill or an official calculator
• Changed rules — when the minimum wage, insurance rates, tax law or pension amounts have changed but are not reflected yet
• Corrections — incorrect or outdated information, or broken links
• Suggestions — calculators, quizzes or game ideas you would like to see
• Privacy or rights issues — requests about personal data or copyright

Please include

• The page URL
• The values you entered, the result you got and the result you expected
• A link to the source (official notice, agency guidance and so on), if you have one
• Your device and browser (if the page looks broken)

Please don't post personal information (national ID numbers, bank account numbers, phone numbers, original pay slips and so on) on the public issue tracker. Example numbers with the digits changed are enough for us to check.