This is not tax advice. Cross-border outcomes turn on facts this page cannot know: your visa category, your income mix, where your employer is incorporated, what you own and when you bought it. Use this to ask a qualified cross-border accountant better questions, and verify every figure against Japan's tax authority and, for the US side, the IRS guidance for citizens abroad.
Your position in Japan
In Japan, you become tax resident under this rule: You are a Japanese tax resident if you have a domicile in Japan or have had a residence in Japan continuously for one year or more. Foreign nationals who have been domiciled or resident in Japan for five years or less within the preceding ten years are 'non-permanent residents', a category that matters a great deal: they are taxed on Japan-source income in full, but on foreign-source income only to the extent it is paid in Japan or remitted to Japan. Cross the five-year line and you become an ordinary resident taxed on worldwide income. Japan has an income tax treaty with the United States, and a totalization agreement, so social contributions are not paid into both systems on the same earnings. The top personal income tax rate in Japan is 55.9%, against a US federal top rate of 37%, and consumption is taxed at 10% against a US sales tax averaging 7.5%. As a US citizen you keep filing a US return from Japan whatever those rates are. Figures reviewed September 4, 2026.
You stay in the US system. Americans file a federal return from Japan every year, plus FBAR if foreign accounts exceed 10,000 dollars in aggregate at any point.
Japan taxes you based on residence. Domicile in Japan, or a residence maintained continuously for a year or more, makes you a resident. But foreign nationals in their first five years get non-permanent resident status, which taxes Japan-source income fully while taxing foreign-source income only where it is paid in or remitted to Japan. If you have US rental or investment income you do not need to bring over, those five years are genuinely valuable, and the remittance rules reward planning rather than improvisation.
Japanese rates are high. National income tax runs 5 to 45 percent, a 2.1 percent reconstruction surtax sits on top of the tax amount through 2037, and inhabitant tax adds a flat 10 percent, giving a combined top marginal rate near 55.9 percent. Consumption tax is 10 percent, reduced to 8 percent on food.
Because Japanese tax usually exceeds US tax at the same income, most salaried movers take the foreign tax credit rather than the 132,900 dollar foreign earned income exclusion for 2026. The 2003 US-Japan treaty, amended in 2013, handles the rest. The totalization agreement means you pay into one pension system, not two.
Budget for inhabitant tax arriving a full year in arrears.
The United States does not stop taxing you
The US taxes citizens on worldwide income regardless of where they live. Moving to Japan adds a second tax system; it does not remove the first one. Most Americans abroad end up owing little or nothing to the IRS, but that outcome is produced by filing correctly, not by leaving.
Two mechanisms produce that result — the foreign earned income exclusion, which reaches earned income only, and the foreign tax credit, which offsets US tax with income tax actually paid to Japan and reaches the passive income the exclusion cannot. You cannot apply both to the same dollar.
The full mechanics are the same wherever you move, so they live in one place: US taxes when you live abroad covers the exclusion tests, the credit, treaties and the saving clause, FBAR and FATCA thresholds, self-employment tax and state residency, and maps which mechanism reaches which kind of income — wages, dividends, gains, rent, pensions and Social Security each land differently. The rest of this page is what Japan specifically changes.
Which mechanism fits Japan
Japan's top rate of 55.9% sits at or above the US federal top rate of 37%. Local tax is doing the heavy lifting, so the foreign tax credit is the mechanism worth modelling first: it usually eliminates the US liability outright and leaves excess credits to carry forward.
Self-employment in Japan
A totalization agreement covers Japan, so a self-employed American here can normally be assigned to one social security system and exempted from the other, evidenced by a certificate of coverage. Arrange it at the start of the engagement, not at filing time.
US-side official references: FEIE ·Foreign tax credit ·FBAR ·FATCA reporting ·Totalization agreements
What Japan's agreements with the US actually change
The general mechanics above apply to every American abroad. What differs country by country is which of them Japan has an agreement to soften. Of the 15 countries covered on this site, 15 have a US income tax treaty, 12 have a totalization agreement and 12 have both. Japan is the case below.
| Issue | Status for Japan | What that means for you |
|---|---|---|
| Double tax on employment income | Treaty in force | A US–Japan income tax treaty exists, so each type of income has an assigned taxing country and there is a defined route to relief rather than an argument. You still file both returns; the treaty decides who taxes what first. |
| Being treated as resident by both countries | Tie-breaker available | Treaties carry a residence tie-breaker: permanent home, then centre of vital interests, then habitual abode, then nationality. It gives you a defensible answer in the year you move, when both countries can plausibly claim you. |
| Social security and payroll contributions | Totalization in force | A totalization agreement covers the US and Japan, so the same earnings are not charged to both social security systems. It also lets contribution periods in each country count toward qualifying for a benefit in the other. |
| Self-employment and freelancing | Certificate of coverage route | Where an agreement applies, a certificate of coverage from the system you do pay into is what you show the other one. Get it before the first invoice, not after the first assessment. |
| Pensions, retirement accounts and investment income | Treaty articles apply | Treaty articles usually address pensions, dividends, interest and capital gains separately from wages. Read the specific articles: a treaty that solves your salary can leave your brokerage account taxed in a way you did not expect. |
Treaty and totalization status is recorded from the sources listed at the foot of this page. Agreements are amended and protocols enter force on their own timetable, so check the current text before taking a position on a return.
Two numbers worth running before you move
Consumption tax, which nobody models
Income tax gets the attention. Consumption tax takes its slice every month without appearing on any return. A US household spending the national average net salary of $4,230 a month would need roughly $2,779 a month in Japan for the same basket, at Japan's overall price level. Of that, the VAT embedded in the prices is up to about $253 a month, against roughly $295 in embedded sales tax at home.
| Measure | United States | Japan |
|---|---|---|
| Headline consumption tax rate | 7.5% | 10% |
| Equivalent monthly basket | $4,230 | $2,779 |
| Tax inside that basket, per month | $295 | $253 |
| Per year | $3,540 | $3,036 |
A ceiling, not a bill. It assumes the whole net salary is spent, and in practice rent sits outside VAT in most systems while food, medicine, books and transport often carry reduced or zero rates, so real exposure lands below this line. The direction of the gap is the useful part: about $42 less per month than at home, before any reduced rate applies.
Marginal rate, read honestly
Japan's top personal rate is 55.9% against a US federal top rate of 37%, a gap of +18.9 points. That comparison is weaker than it looks in both directions. The US figure excludes state income tax, which can add several points on top. The Japanese figure bites at its own threshold, which may be far lower or far higher in income terms than the US bracket it is being compared to. Top rates tell you the shape of a system, not your bill. Model your actual income against the brackets on the official site before you decide anything.
How Japan compares on tax across our dataset
Japan ranks 15 of 15 on headline top personal rate, lowest first, with 0 countries charging a higher top rate. Every row links to that country's own tax page.
| Country | Top rate | VAT | US treaty | Totalization |
|---|---|---|---|---|
| United States (baseline) | 37% | 7.5% | Not applicable | Not applicable |
| Mexico | 35% | 16% | Yes | No |
| Thailand | 35% | 7% | Yes | No |
| New Zealand | 39% | 15% | Yes | No |
| Italy | 43% | 22% | Yes | Yes |
| Australia | 45% | 10% | Yes | Yes |
| United Kingdom | 45% | 20% | Yes | Yes |
| Spain | 47% | 21% | Yes | Yes |
| Norway | 47.4% | 25% | Yes | Yes |
| Germany | 47.5% | 19% | Yes | Yes |
| Portugal | 48% | 23% | Yes | Yes |
| Netherlands | 49.5% | 21% | Yes | Yes |
| Ireland | 52% | 23% | Yes | Yes |
| Sweden | 52.4% | 25% | Yes | Yes |
| Canada | 53.5% | 5% | Yes | Yes |
| Japan · this page | 55.9% | 10% | Yes | Yes |
Headline rates only. They ignore social contributions, local surtaxes, wealth and inheritance taxes, and the very different incomes at which each top rate starts. A country with a high top rate that begins at a high threshold can cost a middle earner less than one with a lower rate that begins early.
The sequence of tax events in your move year
The move year is the messy one: part-year residence in two systems, two calendars, and deadlines that do not line up. These are the three points where Japan itself changes the answer rather than the US side — the full order, from modelling both mechanisms before you go to re-checking thresholds every year after, is in the shared guide.
- The day you arriveRecord the arrival date against something durable, such as a boarding pass, a lease or a registration receipt, because you may have to evidence it years later. It is the day the clock starts on the rule that decides your Japanese tax residency: You are a Japanese tax resident if you have a domicile in Japan or have had a residence in Japan continuously for one year or more. Foreign nationals who have been domiciled or resident in Japan for five years or less within the preceding ten years are 'non-permanent residents', a category that matters a great deal: they are taxed on Japan-source income in full, but on foreign-source income only to the extent it is paid in Japan or remitted to Japan. Cross the five-year line and you become an ordinary resident taxed on worldwide income.
- Weeks 1 to 8: register locallyA Japanese tax number is usually a precondition for a bank account, a lease and a payroll run, so it happens early whether or not you feel like a taxpayer yet. Registering does not by itself make you resident; the residency rule above does. Because the US and Japan have a totalization agreement, the social contributions you start paying here should not be duplicated on the US side — but the exemption has to be claimed with a coverage certificate, not assumed.
- First US filing from abroadTaxpayers whose tax home is abroad get an automatic extension beyond the April deadline, and a further extension on request. The extension is for filing, not for paying: interest runs from the original date. The US-Japan treaty decides which country taxes what before either return is prepared, so read the article covering your income type first — it can change which return you complete first.
State residency: the bill people do not expect
Several states test domicile — your permanent home in intent, not where you physically are — so you can spend a full year in Japan and still be assessed as a resident of your old state, on your worldwide income. The relief described above is federal, and a state is not required to follow any of it. Severing residency rests on evidence you gather before you go, and it is easier to establish that you left cleanly on the way out than to argue it from Tokyo two years later.
The full checklist, and which states are the difficult ones, is in the US expat tax guide — it applies whichever country you move to.
What to keep, from day one
Start a day-count log before you go, with arrival and departure dates for every trip, including trips back to the US. Two separate tests are settled on it: the US physical presence test, and Japan's own residency rule — You are a Japanese tax resident if you have a domicile in Japan or have had a residence in Japan continuously for one year or more. Foreign nationals who have been domiciled or resident in Japan for five years or less within the preceding ten years are 'non-permanent residents', a category that matters a great deal: they are taxed on Japan-source income in full, but on foreign-source income only to the extent it is paid in Japan or remitted to Japan. Cross the five-year line and you become an ordinary resident taxed on worldwide income.
The rest of the list — payslips, year-end balances, cost basis, coverage certificates and exchange rates — is in the US expat tax guide — it is the same wherever you move.
Tax questions about Japan
Do I still pay US taxes if I live in Japan?
Yes. US citizens file a federal return regardless of where they live, plus FBAR if foreign accounts exceed 10,000 dollars combined. The foreign earned income exclusion is 132,900 dollars for tax year 2026, but because Japanese tax usually exceeds US tax at the same income, most salaried movers use the foreign tax credit instead. The 2003 US-Japan treaty and the totalization agreement prevent double taxation and double social security contributions.
Sources and review
The Japan-specific figures on this page, meaning the residency rule, treaty and totalization status, rates and notes, come from the sources below. The general US mechanics are described from published IRS, FinCEN and SSA guidance, linked inline above.
What these numbers are. The headline figures were re-derived from primary sources during review. Some category indices could not be matched to a published statistic and are reasoned estimates, marked as such in the list below. Where a source entry says a value is derived, estimated or crowd-sourced, that is exactly what it is: no international body publishes a like-for-like index for every category, and private insurance premiums are not published at all in most countries. Rent figures are national market averages, so a capital city will run above them. How the dataset is built.
- National Tax Agency, 2025 Income Tax and Special Income Tax for Reconstruction Guide, section 1-3 'Taxpayers and the scope of taxable income': a resident is anyone with a domicile or a residence of one year or more; a resident of non-Japanese nationality with a domicile or residence in Japan for an aggregate five years or less within the preceding ten years is a non-permanent resident, taxed on income other than foreign-source income, on foreign-source income paid in Japan, and on foreign-source income paid abroad and remitted to Japan — accessed September 4, 2026
- National Tax Agency, 2025 Income Tax and Special Income Tax for Reconstruction Guide index, the tax authority page cited as taxes.official_url and the parent of the residency and rate sections used on this page — accessed September 4, 2026
- JETRO, Investing in Japan section 3: individual income tax rates 5% to 45%, 2.1% reconstruction surtax through 2037, 10% local inhabitant tax — accessed September 4, 2026
- IRS, US-Japan income tax treaty documents (2003 convention and protocol, 2013 protocol) — accessed September 4, 2026
- IRS, tax inflation adjustments for tax year 2026: foreign earned income exclusion 132,900 dollars — accessed September 4, 2026
- Japan Pension Service, status of social security agreements in force, confirming the United States agreement covers both elimination of dual coverage and totalization of periods — accessed September 4, 2026
- Exchange rate used for all yen to dollar conversions on this page: 1 USD = 156.25 JPY on 4 September 2026 (ECB reference rates via Frankfurter) — accessed September 4, 2026
- World Bank, Japan total population 123,366,734 (2025) — accessed September 4, 2026
Your New Country publishes reference information, not tax advice. Tax positions are fact-specific and the penalties for getting a cross-border position wrong are heavier than the fees for getting it checked. Before you file, take advice from an accountant who works both systems, and confirm everything against Japan's tax authority and the IRS, which administers the US rules described here.