Who must file: Freelancers, side-income earners (¥200,000+/year extra income), those with 2+ employers, people who left mid-year, and anyone claiming deductions beyond the standard year-end adjustment. Who doesn’t need to file: Salaried employees with one employer — your company handles it via nenmatsu chōsei. Deadline: February 16–March 15 (for previous year’s income). Biggest mistake foreigners make: Not knowing about the second-year residence tax spike (housing allowance stops, ¥100,000–300,000 bill arrives in June).
Tax season arrives, and suddenly you’re not sure: do you need to do anything? Your company did something called nenmatsu chōsei in December — does that cover it? Then a friend mentions they just got hit with a ¥200,000 residence tax bill they weren’t expecting. And somewhere in the back of your mind you’re wondering what Japan even knows about your accounts back home.
Deep breath. This guide covers exactly who needs to file, what actually gets reported, and the specific traps that catch foreigners off-guard.
Do You Need to File a Tax Return?
You DON’T need to file if:
- You have one employer who withholds tax (gensen chōshū)
- Your annual salary from that employer is ¥20 million or less
- You have no other significant income (no side jobs, investments, foreign income)
Your employer handles the year-end adjustment (nenmatsu chōsei, 年末調整) and submits on your behalf. You’re done.
You DO need to file if:
| Situation | Why |
|---|---|
| Self-employed / freelance | All income must be declared |
| Side income over ¥200,000/year | Threshold for mandatory declaration |
| Income from 2+ employers | Withheld tax across employers doesn’t reconcile automatically |
| Left Japan mid-year | Must file before departure or appoint tax representative |
| Claiming deductions beyond year-end adjustment | Home loan (1st year), high medical expenses, Furusato nozei (6+ municipalities) |
| Received overseas income | Must declare if resident for 5+ years OR income is Japan-sourced |
| Stock/investment gains | Gains from non-Japanese accounts, or general accounts (ippan kōza) |
You MAY want to file to get a refund if:
- You had high medical expenses (over ¥100,000 or 5% of income)
- You changed jobs mid-year and one employer didn’t do year-end adjustment
- You made charitable donations
Key Dates
| Event | Date |
|---|---|
| Tax year | January 1 – December 31 |
| Employer sends 源泉徴収票 | By January 31 |
| Filing window opens | February 16 |
| Filing deadline | March 15 |
| Residence tax bill arrives | June (for previous year’s income) |
| Refund deposited | 3–5 weeks after filing |
Filing late incurs penalties. If you miss the window, file as soon as possible — the penalty for late filing (5–15%) is smaller than the penalty for not filing (non-filing surcharge up to 20%).
How to File
Option 1: e-Tax Online (Recommended)
Japan’s e-Tax system at etax.nta.go.jp handles online filing.
You need one of:
- My Number Card + IC card reader (or NFC-enabled smartphone)
- ID and password (riyōsha shikibetsu bangō) issued at your local tax office
Process:
- Log in with My Number Card
- Enter income (from your 源泉徴収票 — employer-issued tax statement)
- Enter deductions
- Submit and get confirmation number
The interface is primarily Japanese. Use Google Translate camera mode or prepare your 源泉徴収票 numbers in advance — you only need to enter a handful of figures.
Option 2: At the Tax Office (税務署)
Bring all documents to your local tax office. February–March, most offices have help desks and extended hours. You can file by paper, and staff will assist with questions.
Find your nearest office: nta.go.jp/about/organization/index.htm
Option 3: Hire a Tax Accountant (税理士)
For complex situations: multiple income sources, overseas assets, business deductions, crypto, selling property.
Cost: ¥30,000–100,000+ depending on complexity. Worth it if your situation is complex or if the refund/savings exceed the fee.
Search: zeirishi.net — Japan’s official tax accountant directory. Some offer English consultation.
Documents to Prepare
| Document | Notes |
|---|---|
| 源泉徴収票 (Gensen chōshū-hyō) | Year-end tax statement — issued by employer in January |
| My Number | Required on all tax filings |
| Bank account (Japanese) | For refund direct deposit |
| Medical receipts | If total exceeds ¥100,000 or 5% of income |
| Furusato nozei 寄付金受領証明書 | If donating to 6+ municipalities (under 5 uses Worrisome Card instead) |
| Life/earthquake insurance certificates | For deductions (sent by insurer in October–November) |
| Housing loan year-end balance | For home loan deduction (1st year only — subsequent years handled by employer) |
The Residence Tax Shock: What Foreigners Miss
Residence tax (住民税) is separate from income tax — and it catches foreigners completely off guard.
How it works:
- Calculated on previous year’s income
- First bill arrives June of your 2nd year in Japan
- Paid in 4 installments: June, August, October, January
- Rate: approximately 10% of your taxable income
The shock: In your first year, you pay zero residence tax (no prior-year Japan income). Then in June of your second year, a bill for ¥100,000–300,000 arrives. This is not a mistake and not a penalty — it’s how the system works.
Budget for it from the start. Set aside 10% of your monthly income from month 1.
If you leave Japan mid-year, your residence tax for that year is due immediately before departure or paid by your appointed tax representative.
Overseas Income: The 5-Year Rule
Japan taxes worldwide income — but only after 5 years of residency.
| Residency Period | What’s Taxed |
|---|---|
| Under 5 years | Japan-sourced income only (salary, Japan investments) |
| 5+ years (jūsho or permanent resident) | All worldwide income — including foreign dividends, rent, business income |
What “worldwide income” includes for long-term residents:
- Rental income from property abroad
- Foreign stock dividends
- Foreign business income
- Income from overseas bank accounts
If you’ve been in Japan 5+ years and have overseas income you haven’t been declaring, consult a tax accountant immediately. The statute of limitations is 5–7 years for unpaid taxes.
Freelancers and Self-Employed Foreigners
If you’re freelance or self-employed, filing is mandatory — and more complex.
What you can deduct:
| Expense | Deductibility |
|---|---|
| Home office (proportional) | Yes — calculate floor-area ratio |
| Internet and phone (business portion) | Yes |
| Equipment (PC, cameras, tools) | Yes — depreciated over useful life |
| Professional software subscriptions | Yes |
| Business travel and transport | Yes — with receipts |
| Meals (with clients — documented) | 50% deductible |
| Japanese language school (if for work) | Debated — consult accountant |
Business registration: If your freelance income exceeds ¥1 million/year, registering as a sole proprietor (kojin jigyōnushi) lets you open a business bank account and deduct more expenses. File at your local tax office.
Consumption tax (shōhizei): If your sales exceed ¥10 million in a given year (from 2 years prior), you become liable for consumption tax collection and remittance. This rarely applies to typical freelancers but is worth tracking.
Investment and Cryptocurrency
Japanese brokerage accounts (特定口座/源泉徴収あり): If you invest through a Japanese broker with tax withheld at source (gentenbuchū), you don’t need to file — tax is handled automatically.
General accounts (ippan kōza): You must file and declare gains manually.
Overseas brokerage accounts: Gains must be declared if you’re a tax resident (regardless of 5-year rule for investment income).
Cryptocurrency: Taxed as “miscellaneous income” (zatsu shotoku) in Japan — one of the heaviest tax categories (marginal rate up to 55%). All crypto-to-fiat and crypto-to-crypto transactions are taxable events. Use portfolio tracking software (Cryptact, Gtax) to calculate gains.
Common Mistakes Foreigners Make
| Mistake | Consequence |
|---|---|
| Not filing as a freelancer | Late-filing penalties + unpaid tax interest |
| Missing the second-year residence tax bill | Unexpected ¥100,000–300,000 bill in June |
| Assuming employer handles everything (when they don’t) | Underpaid tax + penalties |
| Not declaring overseas income after 5 years | Tax debt + potential penalties |
| Leaving Japan without filing | Japanese tax debt that follows you internationally |
| Missing the 2-year deadline for pension refund | Permanent loss of pension contributions → see pension lump-sum guide |
| Forgetting to register bank account for refund | Refund check gets lost or expires |
Tax Refunds
If you overpaid (common for mid-year job changes, high deductible expenses), you’ll receive a refund (kanpu, 還付) to your registered bank account — typically within 3–5 weeks of filing electronically.
Make sure to register your bank account number when filing. Without it, refunds arrive by postal transfer, which is harder to cash.
Useful Resources
| Resource | Details |
|---|---|
| NTA official site | nta.go.jp — official English guidance available |
| NTA telephone consultation | 0570-00-5901 (weekdays 8:30–17:00) |
| Tokyo English tax consultation | Some tax offices offer limited English consultation Feb–Mar |
| Sending money home from refund | Use Wise — real exchange rate vs. bank markup |
Frequently Asked Questions
Do foreigners have to file taxes in Japan? Salaried employees with a single employer usually don’t — their company handles the year-end adjustment (nenmatsu chōsei). Freelancers, those with side income over ¥200,000/year, people with two or more employers, and those with overseas income must file by March 15.
What is the biggest tax surprise for foreigners in Japan? The second-year residence tax bill. In Japan, residence tax is calculated on the previous year’s income and billed starting June of the following year. Your first year in Japan is free of residence tax — then a bill for ¥100,000–300,000 arrives in your second June with no warning. Budget for it from month one.
Do I pay tax on income I earn abroad while living in Japan? If you’ve been a Japan resident for under 5 years, only Japan-sourced income is taxed. After 5 years of residence, Japan taxes your worldwide income — including foreign dividends, rental income, and business income. This catches many long-term residents off guard.
Can I file Japanese taxes in English? The NTA provides some English-language guidance at nta.go.jp, and e-Tax has partial English support. Most of the actual filing interface is in Japanese. Use Google Translate’s camera mode for documents. For complex situations, hire a bilingual tax accountant (zeirishi) — some specialize in foreign residents.
When is the tax filing deadline in Japan? February 16 to March 15 for the previous year’s income. If you miss it, file as soon as possible — penalties increase the longer you wait, but the late-filing penalty is much smaller than the non-filing surcharge.
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