US Expat Tax in Japan (2026)
Americans working in Japan still owe US tax on worldwide income. This guide covers the Foreign Earned Income Exclusion ($132,900 for 2026), the Foreign Tax Credit (Form 1116), housing exclusion, and Self-Employment tax — with a $110,000 worked example.
FEIE vs Foreign Tax Credit in Japan
Japan is a high-tax country with a modern treaty — the Foreign Tax Credit almost always beats the FEIE once Japanese tax kicks in. Watch the Non-Permanent Resident (NPR) status: Americans in Japan under 5 of the last 10 years get preferential treatment (foreign-source income not remitted to Japan escapes Japanese tax), which affects FTC availability. NPR status expires after 5 years and usually triggers a FEIE-vs-FTC re-evaluation.
Key facts: US & Japan
Tax treaty
Yes — US/Japan treaty in force 2004 (2019 protocol)
Totalization
Yes — since 2005; Kōsei Nenkin coverage exempts US SS via Certificate
Local top rate
45% national + 2.1% surcharge + ~10% local (combined 55.95%)
High-cost housing cities
Tokyo, Yokohama, Nagoya, Osaka, Kobe listed in IRS Notice
Worked example — $110,000 salary (2026)
Single filer, full qualifying year (330+ day physical-presence test), standard deduction, no self-employment income. Numbers are federal only — add local Japan tax separately.
Gross salary
$110,000
FEIE exclusion
$110,000
2026 limit $132,900
US federal tax with FEIE
$0
After stacking rule
FEIE tax saving
$15,370
vs no exclusion
Run your own numbers on the Foreign Earned Income Exclusion calculator — add housing, adjust qualifying days, toggle self-employment.
Japan income tax (for context)
Japan national income tax is progressive 5%/10%/20%/23%/33%/40%/45% across 7 bands, with 45% above ¥40M. A 2.1% Reconstruction Special Income Tax surcharge (through 2037) applies on national tax owed. Separately, a flat ~10% local inhabitant tax (prefectural + municipal) applies on the prior year's income. Combined top marginal rate ≈ 55.95%.
Foreign Housing Exclusion — Tokyo / Yokohama
The default housing exclusion cap is 14% of the FEIE limit ($18,606 for 2026), after subtracting the 16% base amount. Tokyo and Yokohama are listed in the IRS annual high-cost city notice, which allows a higher per-city cap. Use the current year's notice (IRS Notice 2025-series) for the specific per-city dollar limit — these numbers change annually.
Frequently asked questions
Should I use FEIE or FTC in Japan?
Foreign Tax Credit almost always once you are a permanent resident for Japanese tax purposes. Japan's combined marginal rate (~55.95%) is higher than any US marginal rate, so the FTC zeros out US federal tax. The wrinkle: Non-Permanent Residents (under 5 years) may have lower effective Japanese tax if foreign income is not remitted, and the FEIE can still be useful then. Switching between FEIE and FTC has the 5-year lockout.
What is Non-Permanent Resident (NPR) status and how does it affect my US return?
A US citizen who has been in Japan fewer than 5 of the last 10 years is a Non-Permanent Resident (NPR) for Japanese tax purposes, and is only taxed in Japan on Japan-source income plus foreign-source income remitted to Japan. After 5 years, they become a permanent resident taxable on worldwide income. The shift usually triggers a much higher Japanese tax bill, which in turn increases the FTC available to offset US tax. Time major FEIE/FTC decisions around the NPR-to-PR transition.
Do I pay US Social Security on Japanese wages?
Usually no. The US-Japan Totalization Agreement (in force since 2005) means Kōsei Nenkin or Kokumin Nenkin coverage in Japan generally exempts you from US Social Security and Medicare. Request a Certificate of Coverage from the Japan Pension Service or the SSA to document the exemption.
Does Tokyo qualify for a higher foreign housing exclusion?
Yes. Tokyo is one of the highest per-city limits on the IRS annual high-cost city table. Yokohama, Nagoya, Osaka, and Kobe also appear with enhanced housing caps. Use the current year's IRS notice on Form 2555 — Tokyo rents frequently exceed the default 14%-of-FEIE housing cap.
Is my Japanese Kōsei Nenkin pension recognized by the US?
The US-Japan treaty (Article 17) recognizes Japanese social-security-style pensions as analogous to US pensions. Employer contributions to Kōsei Nenkin are generally not currently US-taxable. Distributions in retirement are taxable only in the residence country under the treaty's savings clause exceptions. Disclose treaty positions on Form 8833.
Sources
Related Calculators
Foreign Earned Income Exclusion
$130k Form 2555 exclusion, physical presence test, housing deduction
Self-Employment Tax
15.3% on 92.35% net, 6.2% SS to wage base, deductible half
Quarterly Estimated Tax
Four installments (4/15, 6/15, 9/15, 1/15), safe harbor 90%/100%
Federal Income Tax Calculator
10–37% brackets, $15,750 standard deduction, progressive calculation