Japan Pension Refund 2026: Beat the 20.42% Withholding Trap

Information current as of May 2026 based on the Japan Pension Service (JPS) lump-sum withdrawal scheme page (updated April 1, 2026), the JPS English lump-sum portal, National Tax Agency (NTA) guidance on income tax on lump-sum payments, NTA guidance on appointing a tax agent, and the MHLW announcement of the 2025 pension reform law. Compiled by Taku Kanaya, founder of LO-PAL and a legal-affairs practitioner in Tokyo. The most expensive mistake I see: assuming "I'll just file from abroad after I leave" — then discovering the 20.42% withholding is permanent because no 納税管理人 was ever appointed.

What is the lump-sum withdrawal payment (脱退一時金)?

The 脱退一時金 returns part of the pension premiums you paid when you leave Japan without qualifying for a regular pension — which requires 10 years (120 months) of coverage (per 厚生年金保険法 §42 and 国民年金法 §26).

国民年金 (National Pension) is flat-rate; FY2026 premium is ¥17,920/month per the JPS premium page (history at the premium variation page); the lump-sum is half the premium × support-rate, capped at 60 months. 厚生年金保険 (Employees' Pension / EPI) is earnings-related: average standard remuneration × support rate, with the 18.3% premium split 50/50 (frozen since September 2017). JPS lists six eligibility tests on its scheme page: not Japanese; ≥6 months of contributions; lost insured status (via 転出届); no current Japan residence; not entitled to a Japanese pension; never previously entitled to a disability pension. If total eligibility reaches 120 months you cannot claim — wait until 65 for the regular pension; the JPS English lump-sum guide confirms this, and totalization treaty months can push you over the 120 line.

Eligibility decision matrix

Your situation	Can you claim?	Notes
Less than 6 months of contributions	No	Below statutory minimum.
6 – 119 months (<10 years)	Yes	Standard eligibility. Cap is 60 months.
120+ months	No — claim regular pension at 65	Already pension-eligible (老齢年金).
Holds Japanese nationality	No	Japanese nationals cannot claim.
Any prior disability pension entitlement	No	Even past entitlement blocks the lump sum.
Still in Japan / still has 住民票	No	Must complete the 転出届 first.
More than 2 years since loss of coverage	No	Statutory deadline (国民年金法 §142(1), 厚生年金保険法 附則29-1).

The 20.42% withholding, the formula, and sample numbers

JPS withholds 20.42% from non-resident Employees' Pension lump-sums under 所得税法 §171: 20% national income tax on non-resident retirement income (§169) plus 0.42% Special Income Tax for Reconstruction (復興特別所得税 = 20% × 2.1%), in force through 2037. NTA confirms this on "Income tax on lump-sum withdrawal payments". 国民年金 lump sums are not withheld — §169 targets only 厚生年金 — so if your only exposure was National Pension, the 納税管理人 step does not apply.

As a resident, you would have used the 退職所得控除: ¥400,000 × years of service (minimum ¥800,000) for ≤20 years, or ¥8,000,000 + ¥700,000 × (years − 20) beyond 20, per NTA Tax Answer No.1420. The taxable amount is halved and taxed at progressive rates. For a 5-year EPI worker the deduction is ¥2,000,000 — typically wiping out 100% of taxable income, so the entire 20.42% comes back as a refund.

JPS uses a "support rate" (支給率) capped at 60 as of May 2026 (formulas: JPS procedures page; JPS Q&A index). National Pension: (FY premium × 1/2) × coefficient — with FY2026 ¥17,920, a 6-month claim ≈ ¥53,760 scaling to ¥537,600 at the 60-month cap. EPI: Avg. Standard Remuneration × Support Rate ≈ 9.15% × coefficient. Sample 5-year EPI worker, avg. remuneration ¥350,000, coefficient 5: gross ≈ ¥160,125; 20.42% withholding ≈ ¥32,698; net ≈ ¥127,427; the following year's 退職所得の選択課税 filing recovers the full ≈ ¥32,698. Higher earners (¥600,000+ over 5 years) see gross of ¥1,500,000–¥2,000,000 with ~¥300,000–¥400,000 recoverable.

Pre-departure checklist

1. File the 転出届 at city hall

Visit your 市役所 or 区役所 within 14 days of departure with your 在留カード, マイナンバーカード or 通知カード, and any 国民健康保険証 / 国民年金手帳. The 転出届 deletes your 住民票 — the legal signal triggering the 2-year window. The JPS English lump-sum portal notes JPS can verify the deletion directly, often making separate "no Japanese address" proof unnecessary.

2. Appoint a 納税管理人 (tax representative)

Single highest-leverage step for recovering the 20.42%. Submit a 所得税・消費税の納税管理人の届出書 (NTA form download) to the tax office covering your last Japanese address, per NTA procedure A1-7. The 納税管理人 can be any Japan-resident individual or Japanese corporation — no 税理士 or 行政書士 credential required. Common choices: a Japanese spouse, a colleague, or a specialist 税理士 firm (typical fee ¥30,000–¥80,000). Filing before departure is much cleaner; the NTA English page on tax-agent appointment allows later submission with the return but adds 4–8 weeks.

3. Documents and bank routing

Keep both sides of your 在留カード, your 基礎年金番号通知書 or 年金手帳, your final 源泉徴収票, and full overseas bank routing (account number, SWIFT/BIC, bank address). JPS revised its forms on February 3, 2025 to require fuller overseas routing fields — always download the current form from the JPS portal. Decide whether the original 「支給決定通知書」 will be mailed abroad to you or directly to your 納税管理人; your representative cannot file the refund return without it.

Filing the claim and recovering the withholding

Download the current form from the JPS English lump-sum page (15 languages). Form: payment.files/A.pdf; example: A-ex.pdf. Attach a passport copy, bank-verification document, and photocopy of your 基礎年金番号通知書 or 年金手帳. Mail tracked to Japan Pension Service (Foreign Business Group), 3-5-24 Takaido-Nishi, Suginami-ku, Tokyo 168-8505, Japan. Processing takes 3–6 months. For follow-up call 0570-05-1165 from Japan or +81-3-6700-1165 from overseas (JPS multilingual page).

Once the original 「支給決定通知書」 is in hand, recovery is the "退職所得の選択課税" election under 所得税法 §171, which recharacterizes the lump sum to a resident-style calculation with the 退職所得控除 and ×1/2 rule. It cannot be filed until the calendar year after payment, per the NTA filing example at 退職所得の選択課税の記載例 (edge cases: Tokyo Regional Tax Bureau ruling). Your 納税管理人 files at the tax office covering your last Japanese 住民票 address, not their own, as the NTA tax-agent guidance page confirms; locate it via 国税庁 税務署所在地検索. Refunds arrive in 4–8 weeks; the filing is a 還付請求 per NTA refund-claim rule with a 5-year window from January 1 of the year after payment.

Totalization agreements: the strategic decision

The lump-sum is often not the best choice if your home country has a totalization agreement with Japan. Once you take it, the corresponding Japanese months are wiped (per the JPS English guide) — they no longer count toward Japanese pension eligibility or home-country totalization. Per the JPS agreements status page and MHLW social security agreement overview, Japan has 24 agreements in force as of May 2026 (Austria effective December 1, 2025).

Country	Effective date	Type
Germany	February 1, 2000	Full totalization
United Kingdom	February 1, 2001	Dual-coverage only
Republic of Korea	April 1, 2005	Dual-coverage only
United States	October 1, 2005	Full totalization
Belgium	January 1, 2007	Full totalization
France	June 1, 2007	Full totalization
Canada	March 1, 2008	Full totalization
Australia	January 1, 2009	Full totalization
Netherlands	March 1, 2009	Full totalization
Czech Republic	June 1, 2009	Full totalization
Spain	December 1, 2010	Full totalization
Ireland	December 1, 2010	Full totalization
Brazil	March 1, 2012	Full totalization
Switzerland	March 1, 2012	Full totalization
Hungary	January 1, 2014	Full totalization
India	October 1, 2016	Full totalization
Luxembourg	August 1, 2017	Full totalization
Philippines	August 1, 2018	Full totalization
Slovak Republic	January 1, 2019	Full totalization
China	September 1, 2019	Dual-coverage only
Finland	February 1, 2022	Full totalization
Sweden	June 1, 2022	Full totalization
Italy	April 1, 2024	Dual-coverage only
Austria	December 1, 2025	Full totalization

For US nationals, the U.S. Embassy Tokyo page explains how Japanese months combine with U.S. Social Security credits. Take the lump sum if your home country has no totalization (or only dual-coverage), you are below 60 months, and unlikely to return to Japan. Preserve the credits if you are from a full-totalization country and your Japanese + home-country credits will reach the home-country threshold. For dual-coverage-only countries (UK, Korea, China, Italy), the lump-sum is usually the only realistic recovery.

The 2025 pension reform: what changes and when

The 2025 pension reform law (年金制度改正法) was promulgated on June 20, 2025. Two provisions affect dattai ichijikin: (1) the EPI calculation cap extends from 60 to 96 months (8 years), aligning with the 育成就労 (3y) + 特定技能1号 (5y) maximum — effective date set by future cabinet order, expected to align with the 育成就労 start on April 1, 2027; as of May 2026 the 60-month cap remains in force; and (2) a re-entry permit restriction will prevent claiming during a valid 再入国許可 — effective date also pending, with rationale in 第25回社会保障審議会年金部会 資料3 (June 30, 2025). National Pension stays capped at 60 months regardless.

Three mistakes that destroy refunds

1. Not appointing a 納税管理人 before departure. The 20.42% withholding becomes effectively permanent if no one in Japan can file your refund return.
2. Filing more than 2 years after loss of coverage, or at the wrong tax office. The 2-year deadline is fixed (国民年金法 §142, 厚生年金保険法 附則29-1); the jurisdictional office is the one covering your last 住民票 address.
3. Losing the 支給決定通知書, closing your Japanese bank account, or using an old pre-Feb-2025 JPS form. All cause months of delay. Decide on totalization treaty interaction before claiming — once you take the lump sum, those Japanese months are erased.

FAQ

Can I file before I leave Japan? No — JPS requires lost insured status. Prepare documents and pre-appoint your 納税管理人, but submit the claim after departure.

What if I miss the 2-year deadline? Statutory and permanent. You retain coverage months for future totalization but cannot recover cash.

Is the lump sum taxed in my home country? Most countries treat it as foreign-source pension income. The U.S. taxes the gross amount but allows a Foreign Tax Credit for the Japanese withholding. Time your home-country filing after the Japanese refund is finalized.

退職金 (employer severance) vs. JPS lump-sum? Fully separate; 退職金 is paid by your employer. Both can use the 退職所得の選択課税 election but require separate lines and separate 源泉徴収票.

Related LO-PAL guides

• How to appoint a Shinjuku resident tax representative before the June notice hits
• Missed the Kakutei Shinkoku deadline? You can still file
• Lost your 源泉徴収票? How to get it reissued in 2026
• Pension arrears blocking your visa renewal — how to fix it

Need a tax representative or pre-departure walkthrough?

The dattai ichijikin paperwork is a procedural minefield — 転出届 at the 区役所, 納税管理人 at the 税務署, lump-sum claim to JPS in Suginami, refund return at your former district tax office. Post your question on LO-PAL for free and a local Japanese person can help: review documents, accompany you to city hall, sit with you at the tax office, or — if you have already left — connect you with a 税理士 who handles non-resident pension refunds.