Freelancing in Japan as a sole proprietor
Going freelance in Japan — becoming a sole proprietor (個人事業主, kojin jigyo) — means taking on a few things your employer used to handle: your own tax filing, your own health insurance and pension, and some paperwork with the tax office. And before any of it, one thing to check: does your visa even allow it?Here’s the framework, from the National Tax Agency (NTA), the Japan Pension Service and Immigration.
1. The business-commencement notification (開業届)
When you start a sole-proprietor business, you file the Individual Business Commencement/Closure Notification (開業届) with the tax office covering your residence. NTA’s guidance frames the deadline as“by that year’s final tax-return date,” and it can be filed on paper, by mail, or via e-Tax. There’s no direct penalty for late filing, but you’ll want it on file to apply for blue-return status and to open a business bank account.
2. Blue vs white tax return
Every sole proprietor files an annual final tax return (kakutei shinkoku), typically Feb 16 – Mar 15. The choice is how:
| Blue return (青色申告) | White return (白色申告) | |
|---|---|---|
| Application | Required — and the deadline is not simply “2 months” (see below) | None |
| Bookkeeping | Double-entry for the top deduction | Simple |
| Special deduction | up to ¥650,000 (with e-filing / e-bookkeeping; else ¥550,000) | None |
| Loss carry-forward | Yes | No |
The ¥650,000 blue-return special deduction requires double-entry books plus e-Tax filing or qualifying electronic records; meeting only the older requirements caps it at ¥550,000 (NTA).
The blue-return deadline that costs ¥650,000 if you miss it
This is the single most expensive date on this page, and it is widely stated incorrectly as “within two months of starting.” That is only half the rule. The National Tax Agency states it as:
「原則、青色申告書による申告をしようとする年の3月15日まで（その年の1月16日以後、新たに事業を開始したり不動産の貸付けをした場合には、その事業開始等の日から2月以内。）」
“As a rule, by 15 March of the year for which you intend to file a blue return — or, if you newly started the business on or after 16 January of that year, within two months of starting.” (NTA, translated)
| Your situation | Deadline for the blue-return application |
|---|---|
| Started the business on or after 16 January of the year you want blue status | Two months from the start date |
| Started before 16 January, or in an earlier year (e.g. you have been filing white and want to switch) | 15 March of the year you want blue status |
The second row is the one people miss. If you have been freelancing on a white return and want the ¥650,000 deduction for this year, the application is due 15 March of this year — not at the next filing season. Miss it and you cannot use blue status for the whole year; the earliest you can start is the following year.
Two related forms follow the same pattern and the same dates: the notification for salary paid to a family member working in the business (青色事業専従者給与に関する届出書) is due “by 15 March of the year… or within two months if you started on or after 16 January”; the notification for opening a payroll office(給与支払事務所等の開設届出書), which applies once you hire anyone, is due within one month of the event (NTA).
3. Your own health insurance & pension
As a freelancer you’re not on an employer’s shakai hoken. Instead you enroll yourself:
- National Health Insurance — via your municipal office, generally within 14 days of becoming eligible (MHLW). See our health-insurance guide.
- National Pension — you’re a “Category I insured person” and register yourself at your municipal office within 14 days (Japan Pension Service). See our pension guide.
You also owe resident tax, and — for about 70 designated business types — prefectural enterprise tax (only on income above a ¥2.9 million basic deduction).
4. Consumption tax & the invoice system
A sole proprietor is generally exempt from consumption tax if taxable sales two years prior were¥10 million or less (NTA). Since October 2023, the qualified invoice system (インボイス制度)changes the calculus: to issue “qualified invoices” that let business clients claim input-tax credits, you mustregister as a qualified invoice issuer and get a registration number. Registration is optional — but registering also ends that small-business exemption. Weigh whether your clients need qualified invoices.
Frequently asked questions
Do I have to file the 開業届 (kaigyo todoke) before freelancing?
The Income Tax Act requires it when you start a business, but NTA’s current guidance treats the deadline as flexible (up to that year’s final return date) with no direct penalty for late filing. You generally need it on file to apply for blue-return status and open a business bank account, so file it promptly.
What’s the difference between blue and white tax returns?
Blue return (青色申告) needs pre-approval and proper bookkeeping but unlocks deductions up to ¥650,000 (with e-filing / qualifying e-bookkeeping) and loss carry-forward. White return needs no application but gives no special deduction. Both still require the annual final tax return (kakutei shinkoku).
Am I on employees’ shakai hoken as a freelancer?
No. Sole proprietors enroll themselves in National Health Insurance and National Pension through their municipal office (generally within 14 days of becoming eligible) and pay premiums directly — not via payroll deduction.
Do I need to register for the invoice system?
Only if you want to issue “qualified invoices” so business clients can claim input tax credits; registration is optional but many corporate clients now expect it. Registering also ends any small-business consumption-tax exemption you had.
Can I freelance while on a work visa?
Only within your permitted activity, and generally only after obtaining 資格外活動許可 (permission for activity outside your status) for side income. Running your main livelihood as an unrelated sole proprietorship on a work visa is usually not permitted — confirm with the Immigration Services Agency before starting.
This is general information, not tax, legal, or immigration advice (2026-07-13). Thresholds and rules (the ¥10M consumption-tax line, ¥2.9M enterprise-tax deduction, blue-return requirements, and visa rules — e.g. Business Manager requirements tightened in Oct 2025) change over time. Confirm your own situation with a licensed tax accountant (zeirishi), your municipal office, and the Immigration Services Agency.
Sources
- NTA — No.2090 Notifications when starting a business (filing deadline for each form)(retrieved 2026-09-04)
- NTA — Requirements for the ¥650,000 blue-return special deduction(retrieved 2026-07-13)
- NTA — No.6501 Consumption-tax exemption (¥10M base-period sales)(retrieved 2026-07-13)
- Japan Pension Service (English) — Enrollment in National Pension(retrieved 2026-07-13)
- Immigration Services Agency — Permission for activity outside status(retrieved 2026-07-13)