Claiming Overseas Dependents on Japan Taxes: ¥380,000 Each

Quick Answer: If you live in Japan and financially support family who live abroad, you may be able to claim them as dependents and lower your Japanese income and resident tax. The deduction is ¥380,000 per qualifying dependent (¥480,000 for one aged 70+). You must prove the family relationship and your remittances, and for relatives aged 30–69 you generally must have sent them at least ¥380,000 that year. It's claimed through year-end adjustment or a final tax return — and many foreigners never claim it.

If you earn in Japan but send money to parents, a spouse, or children living in another country, Japan's tax system has a deduction built for exactly that — the dependent deduction for relatives living overseas (国外扶養控除). Used correctly, it can meaningfully cut your tax bill. Used carelessly, the claim gets rejected for missing paperwork. Most foreigners never claim it at all.

This guide explains who qualifies, how much it's worth, and the documents you actually need.

This is educational information, not tax advice. The rules are detailed and were tightened in 2023 — confirm specifics with the National Tax Agency (NTA) or a qualified tax professional (税理士).

What is the overseas dependent deduction?

Japan's dependent deduction (扶養控除) lets a taxpayer reduce their taxable income for each qualifying dependent relative they support. Crucially, the relative does not have to live in Japan — if you support family abroad, they can count, provided you can document the relationship and your financial support.

It applies to your income tax and your resident tax, so the benefit shows up twice.

How much can it save you?

The deduction amount per qualifying dependent:

Remember this is a deduction from taxable income, not a cash refund. Your actual saving is roughly the deduction × your marginal tax rate (income tax + ~10% resident tax). For many earners, a ¥380,000 deduction translates to somewhere around ¥57,000–¥115,000 in combined tax saved per dependent, depending on your bracket — and you can claim more than one dependent.

Who counts as an overseas dependent?

To qualify, the relative must:

They don't need to live with you, but you must genuinely support them.

The documents you need (this is where claims fail)

Since January 2023 the NTA tightened the rules for overseas relatives. You generally must provide two things:

  1. Proof of relationship (親族関係書類) — e.g. a copy of the relative's passport plus an official document (birth certificate, family register, or government-issued record) showing their name, date of birth, and address.
  2. Proof of remittance (送金関係書類) — bank transfer records or money-transfer-service receipts showing you actually sent them money that year.

The requirements then depend on the dependent's age:

The remittance rules people get wrong

This trips people up, so be precise:

When do you actually have to do this?

Two different clocks run here, and people miss the claim by watching the wrong one.

The remittance clock closes on 31 December. The money has to reach your relative during the tax year you are claiming for. A transfer sent in January 2027 cannot support a 2026 claim, however large it is. If you intend to claim a relative aged 30–69 for this year, the ¥380,000 has to be sent — and evidenced, in their own name — before the year ends. September is a comfortable time to notice this; December is not.

The paperwork clock is earlier, and it is not where you think. Overseas dependants are declared on the 扶養控除等（異動）申告書, the first of the three forms your employer hands out in November. But that November form is the following year's edition. The claim for the year now ending rides on the form you filed back in January — amended in its 「異動月日及び事由」 column, the one headed date and reason of change.

So if a relative became your dependant in March, the correct move was to tell your employer in March, not to wait for the envelope. If you did wait, November is your chance to catch it: ask for the current year's form back and record the change. The three year-end forms, decoded sets out which form is which and why one of them covers a different year from the other two.

If you miss the year-end adjustment entirely, nothing is lost yet. You claim on a final tax return instead — and where the return exists purely to recover over-withheld tax, it can be filed for five years from 1 January of the following year. An unclaimed 2022 dependant is, in most cases, still claimable. Year-end adjustment or tax return? explains which route applies to you.

How to claim it, step by step

  1. Confirm eligibility — relationship, the dependent's low income, your genuine support, and the age-based remittance test above.
  2. Gather your documents — relationship proof + remittance proof for each dependent (with Japanese translations if the originals are in another language).
  3. Submit the claim — either through your employer's year-end adjustment (年末調整) by handing in the dependent forms and documents, or by filing a final tax return (確定申告) yourself.
  4. Keep copies in case the tax office asks to verify.

If you support family abroad and remit regularly, this pairs naturally with understanding the true cost of those transfers — see how remittance pushes back your FI date and the wider FIRE in Japan: NISA, currency & retirement guide.

How this fits your bigger plan

Supporting family overseas is one of the biggest, most overlooked variables in a cross-border FI plan. This deduction won't change the fact that you're sending money — but it lowers the tax you pay while doing it, which lifts your effective savings rate. The same "keep more of what you earn" logic runs through the medical expense deduction and your NISA and iDeCo accounts.

Use the free Japan Salary Tax Calculator to estimate your net pay, and the PlanTogetherFI calculator to see how a higher savings rate moves your timeline.

PlanTogetherFI is for educational planning only. It is not financial, tax, legal, or investment advice. The overseas dependent deduction has detailed documentation rules — confirm your eligibility and required documents with the NTA or a qualified tax professional.

Frequently Asked Questions

Can I really lower my Japanese taxes by supporting family abroad?

Yes. If you financially support qualifying relatives who live overseas, you can claim them as dependents and reduce your income and resident tax — provided you can document the relationship and your remittances. Many foreign residents are eligible but never claim it.

How much is the deduction worth?

¥380,000 per general dependent, or ¥480,000 for a dependent aged 70 or older. It reduces taxable income, so your actual saving is that amount multiplied by your tax rate (income tax plus roughly 10% resident tax). You can claim more than one dependent.

What documents do I need for an overseas dependent?

Two kinds: proof of the family relationship (passport plus an official record of name, birth date, and address) and proof of remittance (bank or transfer-service records). For relatives aged 30–69, you generally also need to show you sent at least ¥380,000 that year, unless they are a student abroad or have a disability.

Can I claim both of my parents overseas?

Yes, but each parent must individually meet the rules — including receiving money in their own name, and (if aged 30–69) each reaching the ¥380,000 remittance threshold. Separate records per person are essential.

How do I actually claim it?

Through your employer's year-end adjustment (年末調整) by submitting the dependent forms and supporting documents, or by filing a final tax return (確定申告). Keep copies of everything in case the tax office requests verification.

Can claiming overseas dependents cause immigration problems?

Not in itself, and it is worth being precise about this, because the question circulates a lot. No published case, Diet discussion or tax-authority enforcement report connects this deduction to loss of residence status — and the Immigration Services Agency's own policy paper on tightening permanent residency does not mention the deduction anywhere.

What is changing is narrower than the rumour. From 1 April 2027, the immigration law adds a ground for revoking permanent residence where someone 「故意に公租公課の支払をしない」 — wilfully does not pay taxes or social insurance contributions. Three things bound it. It applies to permanent residents only: work statuses, 定住者 and spouse statuses are not exposed to this ground. Where it does apply, the expected outcome is not removal from Japan but a compulsory change to another status, usually 定住者. And it requires wilfulness — the Immigration Services Agency's guideline, still in draft at the time of writing, states that illness, disaster, unemployment, an agreed instalment plan, or an employer failing to hand over contributions already deducted from your pay do not qualify, and that no fixed yen threshold applies.

The everyday connection is duller and matters more. Immigration reads your 課税証明書 and 納税証明書 — five years of them for a permanent residence application on a work status, one year at an ordinary work-status renewal. The permanent residence guideline states that tax paid late is held against you even where it is fully paid by the time you apply. So the thing that protects you is not avoiding the deduction. It is claiming what you are actually entitled to, keeping the evidence, and paying on time.

What happens if I claim someone I shouldn't have?

Much less than people fear, provided you fix it yourself. If you file a corrected return (修正申告) before the tax office notifies you of an audit, the NTA is explicit that there is no under-declaration penalty at all: 「税務署からの調査の事前通知の前に自主的に修正申告をした場合であれば、過少申告加算税はかかりません。」 After a notice, the penalty is 5–10%; once the correction is anticipated by the audit, 10–15%. Late-payment interest (延滞税) applies either way.

The 35% 重加算税 that people have heard of is a different thing entirely. It requires 仮装・隠蔽 — concealment or fabrication, such as forged or altered relationship or remittance documents, or a relative who does not exist. Misjudging whether a 34-year-old sibling met the ¥380,000 test is not that. And criminal prosecution sits somewhere else again: the NTA refers roughly 100 cases a year nationally, averaging about ¥84 million of evaded tax apiece. A wrongly claimed dependent is worth a few tens of thousands of yen. The honest summary is that an incorrect claim is an administrative problem with a clear correction route, not a criminal one — but a fabricated claim is a different category, and that is what the documentary requirements exist to catch.

Sources and further reading

Figures reflect the position as of September 2026. The permanent residence revocation ground described above commences 1 April 2027 and its guideline was still in draft at the time of writing — confirm the current position with the Immigration Services Agency, and your own eligibility with the NTA or a qualified tax professional (税理士).