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Disclaimer

Educational tax estimate, not tax advice, not affiliated with the National Tax Agency. Your employer or tax office decides; confirm before the year-end adjustment.

Rules as of 2026-10-25 from the NTA's 国外居住親族 Q&A (revised Aug 2026), Tax Answers 1180/1177 and the 2026 year-end adjustment guide. Income tax only; resident tax is not calculated. It can't check your actual documents.

What this is

A free educational calculator. It applies a dated reading (as of 2026-10-25) of the National Tax Agency's Q&A on deductions for relatives living outside Japan (国外居住親族に係る扶養控除等Ｑ＆Ａ, revised August 2026), Tax Answers No. 1180 and 1177, the 2026 year-end adjustment guide (including the reform that raises the dependent income limit to ¥620,000 from 2026-12-01) and the NTA's remittance-statement guidance to the numbers you enter, for one relative at a time.

What it is not

It is not tax advice and is not affiliated with the National Tax Agency, any tax office or your employer. It cannot see or verify your documents, whether a payment really went to the relative for living or education costs, their real income, or whether they are a non-resident. Your employer applies the year-end adjustment and the tax office decides on returns. It covers national income tax only; resident tax (住民税) uses different amounts and your city decides it. Rules change: confirm with your employer, your tax office (or the NTA telephone consultation center) or a licensed tax accountant (税理士) before you rely on a result.

Sources

Your data

The numbers you enter stay in your browser (or in a share link you create). No login, no names, no database.