Japan's Life Insurance Deduction and Its ¥120,000 Ceiling

Quick Answer: Three categories, each with its own cap, and an overall ceiling of ¥120,000 for income tax and ¥70,000 for resident tax. Under the post-2012 regime the three category caps already add up to exactly the overall ceiling — so the 2026 increase for households with a child under 23 can add at most ¥20,000, and adds nothing at all to anyone already sitting on the limit.

Of the four deductions on the insurance form your employer hands you in November, this is the one people spend the most time on and understand the least. It has two parallel rule sets depending on when you signed, three categories that cannot be mixed, a ceiling that most explanations mention only in a footnote, and — for 2026 — a headline increase that a good share of the people reading about it will never actually receive.

There is also a way to lose money here by filling the form in correctly but suboptimally, which is in section four. And for foreign residents, the deduction carries the single most expensive misunderstanding of the year, which is in section five.

This is educational information, not tax advice. Amounts depend on your policies, your income and your family situation — confirm with the NTA or a qualified tax professional (税理士).

How does 生命保険料控除 actually work?

Three separate categories, each calculated on its own and then added together:

These are watertight. You cannot move a premium from one category to another to make better use of a cap, and the NTA says so directly: 「支払った保険料の区分を他の区分に振り替えることはできません」.

Cutting across all three is a second division, by when the contract was signed:

The medical category exists only under the new regime — it was created in 2012. That does not mean an older medical policy is worthless: a pre-2012 medical or nursing-care contract still qualifies, it simply counts as 旧生命保険料 inside the general category.

The premium figure you use is net of any dividends or rebates the policy paid you that year, and where a calculation produces a fraction of a yen, it rounds up.

New regime (計算式Ⅰ) — applies to each of the three categories:

Annual premiums Deduction
Up to ¥20,000 The full amount
¥20,001 – ¥40,000 ÷2 + ¥10,000
¥40,001 – ¥80,000 ÷4 + ¥20,000
¥80,001 and above ¥40,000

Old regime (計算式Ⅲ) — general and annuity only:

Annual premiums Deduction
Up to ¥25,000 The full amount
¥25,001 – ¥50,000 ÷2 + ¥12,500
¥50,001 – ¥100,000 ÷4 + ¥25,000
¥100,001 and above ¥50,000

Note what the top row of each table means: your deduction in a category reaches its maximum at an annual premium of ¥80,000 (new) or ¥100,000 (old). Every yen you pay beyond that produces exactly no additional deduction.

Why is the ¥120,000 ceiling the number that matters?

Because under the new regime it is not a distant backstop. It is precisely where you land.

Three categories at ¥40,000 each is ¥120,000 — and the overall ceiling is ¥120,000: 「この合計額が120,000円を超える場合には、生命保険料控除額は120,000円となります」. The per-category caps and the overall cap are the same number. Anyone fully insured across all three categories under the new regime is sitting exactly on the limit, with no headroom at all.

Resident tax is capped separately and more tightly. Its category maximums are ¥28,000 (new regime) and ¥35,000 (old), against an overall ceiling of ¥70,000 — figures set in the Local Tax Act itself. Three new-regime categories at ¥28,000 is ¥84,000, so a fully insured taxpayer loses ¥14,000 of resident-tax deduction to that ceiling before anything else happens.

It is worth converting this into money, because a deduction is not a refund. A ¥120,000 income tax deduction is worth ¥120,000 times your marginal rate. For someone in the 20% band that is ¥24,000 — or ¥24,504 once the 2.1% reconstruction surtax is included, which makes the effective marginal rate 20.42%. Add ¥70,000 of resident tax deduction at the standard 10% and you have ¥7,000 more. Fully maxed out, on a mid-range income, the whole deduction is worth on the order of ¥31,500 a year.

Two caveats on that figure. The 10% resident tax rate is the standard rate, not a universal one — a few municipalities set theirs slightly differently. And from 1 January 2027 a new 防衛特別所得税 of 1% appears while the reconstruction surtax falls to 1.1%, so you will see a new line on your payslip without the combined rate changing. Check your own marginal rate with the Japan salary tax calculator before valuing any of this.

Real money, then, and worth claiming properly. Not, however, a reason to buy insurance you would not otherwise want — which is how it is frequently sold.

What did the 2026 change for under-23 dependants actually give you?

For 2026 and 2027 only, a resident with a dependent relative aged under 23 gets a more generous table for the new-regime portion of the general category, lifting its maximum from ¥40,000 to ¥60,000.

新生命保険料 where you have a dependant under 23 (計算式Ⅱ):

Annual premiums Deduction
Up to ¥30,000 The full amount
¥30,001 – ¥60,000 ÷2 + ¥15,000
¥60,001 – ¥120,000 ÷4 + ¥30,000
¥120,001 and above ¥60,000

Four things about this that the coverage tends to skip.

The uplift is small, and it is capped twice. The general category's maximum moves by ¥20,000, so ¥20,000 is the absolute most this can ever add — and only if your general new-regime premium is ¥120,000 or more. At a premium of ¥30,000 or less the two tables give an identical answer, so it adds nothing whatever.

Then the overall ceiling clips whatever is left. It did not move: 「一般生命保険料控除、介護医療保険料控除及び個人年金保険料控除の合計適用限度額は、改正前と同様の12万円となります」. So ¥60,000 + ¥40,000 + ¥40,000 is ¥140,000, cut straight back to ¥120,000.

Putting those together: your actual gain is the smaller of the increase in the general category and the room you have left under ¥120,000. Two households, both with ¥80,000 of deduction across the medical and annuity categories:

It applies only to new-regime premiums. The table is headed 「新保険料等用」. If your only general policy was signed before 2012, this measure gives you nothing at all — a point worth checking before you get your hopes up.

And there is no resident tax equivalent. The Local Tax Act sets the general new-regime maximum at ¥28,000 with no alternative table, and the phrase 「二十三歳未満」 appears nowhere in its insurance provisions. The 2025 reform outline confirms the carve-out was deliberate: its local-tax paragraph carries across only items (2) and (3) of that section — the two housing-loan measures — and pointedly omits the insurance one. If you assumed the ¥60,000 flows through to your 住民税, it does not.

On qualifying: the relative must meet the 扶養親族 test, which means sharing a household budget with you and having total income of ¥620,000 or less for 2026 — parenthood alone is not the test. The form asks for a birth date on or after 2 January 2004. Usefully, both parents can claim it on the same child: 「その夫婦の両方が…適用を受けることができます」.

Old policy or new — should you combine them?

This is where the deduction is genuinely under-claimed, and it costs real money.

If you hold both an old-regime and a new-regime policy in the same category, you are not obliged to add them together. The NTA calculates three candidate figures and takes the largest:

  1. The new policy alone — maximum ¥40,000
  2. The old policy alone — maximum ¥50,000
  3. Both combined — maximum ¥40,000

The ¥40,000 cap applies only to the third route. So if the old policy's premium is large, combining actively costs you: you trade a ¥50,000 ceiling for a ¥40,000 one.

The NTA's own worked example uses a ¥40,000 new premium alongside a ¥100,000 old one. New alone gives ¥30,000. Old alone gives ¥50,000. Combined gives ¥40,000. The answer is to claim the old policy alone and ignore the new one entirely in that category.

The cut-off is ¥60,000, and it is the NTA's own rule rather than a rule of thumb: where the old-regime annual premium in a category exceeds ¥60,000, claiming it alone always beats combining. The choice is free, and you make it separately for each category.

One important exception. If you qualify for the under-23 measure and you have a new-regime general premium, the combined route wins instead — because that route's ceiling rises to ¥60,000 as well. An eligible household with a ¥100,000 old premium and a ¥120,000 new one claims ¥60,000 by combining, not the ¥50,000 the general rule would suggest. Getting this backwards costs ¥10,000 of deduction.

A practical warning on identifying which regime a policy falls under: do not reconstruct it from the date you remember signing. Renewals and conversions can change a contract's classification. The authoritative statement is the 控除証明書 the insurer sends you, which says which regime applies. Use the certificate, not your memory.

Does a policy from before you moved to Japan count?

No — and this is the most expensive misunderstanding available in this deduction.

A policy concluded outside Japan does not qualify, however large the premiums. The NTA's exclusion list is explicit about 「外国生命保険会社等または外国損害保険会社等と国外において締結したもの」. If you kept up a life policy from your home country after moving here, it produces zero deduction.

The mirror image catches people the other way, and is just as important. A foreign insurer's licensed Japanese operation qualifies normally — 外国生命保険会社等 appears on the list of acceptable counterparties. The operative phrase is 国外において: where the contract was concluded, not the insurer's nationality and not where you live now. A policy written in Japan by the Japanese arm of an international insurer is an ordinary qualifying contract.

Two further points for non-Japanese readers. This deduction is residents-only in its entirety — the Income Tax Act opens the provision with 「居住者が」, so this is not a special condition of the 2026 measure but the basic requirement for claiming anything here at all. And the timing is split: the income tax effect lands in your December payslip, while the resident tax effect arrives across June 2027 to May 2028. If you are leaving Japan during 2027 you may pay resident tax on a year whose benefit you never see — which interacts with the year-end adjustment timing trap for people transferring out.

Whose policies can you claim, and what do you need?

The test is who pays, not whose name is on the contract. The NTA is unusually direct: 「契約者が誰であるかは要件とされていません」 — premiums you pay on a policy held by your spouse are your deduction, provided you can show you paid them.

But there is a second test, on who receives the payout, and it differs by category:

There is no shared-household requirement for this deduction, unlike the social insurance and earthquake insurance deductions on the same form. A child living independently can still be the beneficiary. (The under-23 measure is the exception, since it runs through the dependant test, which does require a shared household budget.)

The beneficiary test is applied month by month, at the time each premium is paid. The NTA works a divorce through this: premiums covering months when an ex-spouse was still the named beneficiary are not deductible, while the months before and after are.

One caution before you start paying a family member's premiums for the deduction. Who funds a policy determines how the eventual payout is taxed — where the payer and the recipient are different people the proceeds can be treated as a gift, and where they are the same person as 一時所得. A few thousand yen of deduction now can be an expensive way to buy a tax problem in twenty years.

On the certificate. You need the 控除証明書 for essentially everything, with three narrow exceptions: an old-regime general life contract whose annual premium is ¥9,000 or less; premiums under a group policy arranged through your employer; and 確定給付企業年金 or 適格退職年金 contributions. Note that an old-regime annuity contract needs a certificate regardless of how small it is.

If it has not arrived or you have lost it, you are not stuck: your employer may complete the year-end adjustment provisionally on the condition that you produce the certificate by 31 January of the following year. A reissue is a routine request to the insurer. Failing that, you claim on a tax return instead — see the year-end adjustment versus the tax return.

What does not qualify: savings-type policies with a term under five years; pure injury-only cover; 財形 savings contracts; and employer-paid premiums — with a precise test. If the employer paid it and it was taxed as part of your salary, it counts as yours. If the employer paid it tax-free, it does not. A group policy deducted from your pay is yours; one the company funds tax-free is not.

While the form is in front of you, remember that iDeCo goes on the same sheet under a different heading — 小規模企業共済等掛金控除, not life insurance. That is the commonest misfiling on this form, and it is covered in iDeCo for beginners.

Frequently Asked Questions

How much is the life insurance deduction actually worth in Japan?

At most ¥120,000 against income tax and ¥70,000 against resident tax. Because a deduction reduces taxable income rather than tax itself, the cash value is the deduction times your marginal rate — roughly ¥31,500 a year for someone in the 20% income tax band who is fully maxed out across all three categories, and considerably less for most people.

Can I claim a life insurance policy I bought before moving to Japan?

No. A contract concluded outside Japan is excluded regardless of the premium. However, a policy written in Japan by a foreign insurer's Japanese operation qualifies normally — the test is where the contract was concluded, not the insurer's nationality.

I have an old policy and a new one. Do I add them together?

Not necessarily, and adding them is often wrong. Compare three figures — new alone, old alone, and both combined — and claim the largest. Combining caps the category at ¥40,000 while the old policy alone can reach ¥50,000, so where the old premium exceeds ¥60,000 you should generally claim it alone. The exception is if you qualify for the under-23 measure and have a new-regime premium: then combining wins, because its ceiling rises to ¥60,000 too.

Does the 2026 increase for a child under 23 mean my deduction goes up ¥20,000?

¥20,000 is the ceiling on the increase, not the typical result. It only reaches that if your general new-regime premium is ¥120,000 or more, and whatever it produces is then capped by the unchanged ¥120,000 overall limit — so a household already at that limit gains nothing. It applies only to new-regime premiums, so a pre-2012 policy gets nothing from it, and there is no equivalent measure for resident tax.

Can I claim premiums I pay on my spouse's policy?

Yes, if you actually paid them and can show it — the contract holder is not the test. Be aware that funding someone else's policy affects how the eventual payout is taxed and can create a gift tax charge later, so it is worth thinking past the immediate deduction.

PlanTogetherFI is for educational planning only. It is not tax, financial or legal advice. Deduction amounts depend on your policies, contract dates, income and family circumstances, and the under-23 measure described above is a temporary provision covering the 2026 and 2027 tax years only — confirm your own position with the NTA or a qualified Japanese tax professional (税理士).

Sources and further reading

Rules reflect the position as of September 2026. The under-23 measure is a temporary provision for the 2026 and 2027 tax years. Resident tax is levied by local government at a standard rate that a small number of municipalities vary — confirm yours with your own municipality.