Becoming a sole proprietor in Japan
The 開業届, the blue return, and the money systems freelancers set up first.
File a 開業届 with your tax office and the 青色申告 application at the same time; set up cloud accounting and reserve 20–35% of profit for taxes.Freelance & business
Sole-proprietor setup, blue returns, the invoice system, and bookkeeping.
Going independent in Japan usually means registering as a sole proprietor (個人事業主) by filing a notification of business opening (開業届) with your tax office — free and mostly a formality. Filing the blue-return application (青色申告承認申請) at the same time unlocks a deduction of up to ¥650,000 and loss carry-forward, in exchange for proper double-entry bookkeeping.
Bookkeeping is where cloud software earns its keep. freee and Money Forward Cloud connect to your bank and cards, categorise transactions, and generate the blue-return forms and e-Tax data; Yayoi is a long-established alternative. Budget for taxes yourself: income tax, resident tax, national health insurance, and national pension all come from your own cash flow, so many freelancers reserve 20–35% of profit.
The Qualified Invoice System (インボイス制度, from October 2023) changed things for small businesses. If your clients need to claim consumption-tax credits, they may ask you to register for a T-number, which turns you into a taxable business for consumption tax. Whether to register is a real trade-off — this section helps you frame it before deciding.
Important cautions
- Deadlines and the invoice-system rules matter; a 税理士 (tax accountant) is worthwhile once revenue or clients grow.
Key points
- Register as a sole proprietor with a 開業届; file the 青色申告 application at the same time to unlock the deduction.
- The blue return can deduct up to ¥650,000 but requires double-entry bookkeeping and e-filing.
- freee and Money Forward Cloud automate bookkeeping and blue-return forms; Yayoi is the veteran alternative.
- You pay your own income tax, resident tax, pension, and health insurance — many reserve 20–35% of profit.
- The invoice system (T-number) affects whether clients can claim consumption-tax credits on your invoices.
- Registering for the invoice system makes you a consumption-tax payer — weigh it against your client base.
Guides
Related products & services
freeeフリー
Cloud accounting software · freee K.K.
Beginner-friendly cloud accounting built around guided workflows, popular with sole proprietors for blue-return filing and e-Tax.
- Guided, question-based bookkeeping for beginners
- Bank/card auto-import and blue-return output
- Invoice-system and e-Tax support
Fees: Subscription plans (monthly/annual) vary by tier — verify current pricing.
Money Forward Cloudマネーフォワード クラウド
Cloud accounting software · Money Forward
Cloud accounting with strong automation and integrations, popular with freelancers and small companies that value flexible bookkeeping.
- Extensive bank/card/service integrations
- Flexible bookkeeping suited to growing businesses
- Invoice-system and e-Tax support
Fees: Subscription plans vary by tier — verify current pricing.
Yayoi弥生
Accounting software · Yayoi K.K.
A long-established accounting-software brand with desktop and cloud options, widely used and supported by tax professionals.
- Long track record and wide professional familiarity
- Desktop and cloud options
- Blue-return and e-Tax support
Fees: Desktop license or cloud subscription depending on product — verify current pricing.
Frequently asked questions
How do I register as a freelancer (sole proprietor) in Japan?
File a notification of business opening (開業届) with your local tax office within about a month of starting — it is free and short. At the same time, file the blue-return application (青色申告承認申請書) to unlock the up-to-¥650,000 deduction. You keep your existing visa status if it permits the work; some visa types need permission for self-employment, so check your residence status first.
What is the blue return (青色申告) and is it worth it?
The blue return is a filing status that rewards proper bookkeeping. With double-entry books filed electronically, you can deduct up to ¥650,000 from your income, carry losses forward for three years, and deduct family salaries. The trade-off is more disciplined recordkeeping — which cloud accounting software largely automates. For most freelancers with steady income, the tax saving clearly outweighs the effort.
Do I need to register for the invoice system (インボイス) as a freelancer?
It depends on your clients. Registering gives you a T-number so business clients can claim consumption-tax input credits on what they pay you — but it also makes you a consumption-tax payer, adding cost and paperwork. If your clients are consumers or tax-exempt small businesses, registering may add cost for no benefit. If your clients are companies that demand qualified invoices, not registering can cost you work. Weigh your client base; a transitional credit for buyers from unregistered suppliers is stepping down over time.
How much should a freelancer set aside for taxes in Japan?
A common rule of thumb is to reserve 20–35% of profit for income tax, resident tax, national pension, and national health insurance combined — higher as your income rises, because income tax is progressive. Remember resident tax and health-insurance premiums are billed based on the prior year, so your bills lag your income. Set the reserve aside in a separate account each month rather than facing it all at filing time.
What about pension and health insurance when self-employed in Japan?
As a sole proprietor you generally enroll in National Health Insurance (国民健康保険) and the National Pension (国民年金), and you pay both yourself — there is no employer split. National Pension is a flat monthly amount; National Health Insurance premiums are income-based and billed by your municipality. You can add optional coverage (e.g. the national pension fund, iDeCo, or income-protection insurance) to close gaps. Budget these into your tax reserve.