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
Form 2555 FEIE limit, housing exclusion, and qualifying tests.
Self-Employment Tax
Calculate SE tax on 1099 and freelance income.
Quarterly Estimated Tax
Calculate quarterly payments for self-employed income.
Federal Income Tax
Calculate your federal income tax by filing status.