Working out whether you need to file
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 7 min
In short
Trading crypto does not automatically mean you must file a return in Japan. Whether you need to depends on things like whether you are an employee, what other income you have, and how your year-end adjustment was handled — and this site cannot draw that line for you. Find the description that matches your own situation in the National Tax Agency's guidance, and if it is still unclear, ask the tax office or a tax accountant.
Key points
- It turns on the shape of your whole income, not on the fact that you traded crypto
- The guidance differs for employees, sole traders, and those who had a year-end adjustment
- Income tax and local inhabitant tax procedures can be separate matters
- This site gives no monetary thresholds — take those from the tax agency or your tax office
Definition
Checking, against the overall shape of your income, whether a year of crypto activity has to be included in a tax return.
Start by separating two different things: buying crypto, and having something to report. Simply holding what you bought is not the same as having realised a result through a sale, a swap or a payment. Which events settle a gain or loss is covered separately (see tax-when-taxable), so begin by listing what actually happened during the year.
Whether a return is required then depends on the overall shape of your income. An employee whose payroll ran a year-end adjustment, someone paid by more than one employer, a sole trader with business income and a pension recipient all fall under different descriptions. People also file for unrelated reasons — medical expenses or donations, for instance — in which case crypto income comes along with that return. Because the combinations differ from person to person, this site will not tell you that your case needs no return.
The route to an answer is to read the National Tax Agency's filing guidance for your own position first — employee, business operator, and so on — and then its dedicated crypto material for the asset-specific treatment. If, having read it, you still cannot place yourself, do not stop there: contact your local tax office or a tax accountant. Tax offices do answer general questions about whether a return is needed.
It is particularly worth asking when you have used several exchanges at home and abroad, when DeFi or NFTs are involved, when earlier years are still unsorted, or when the activity might have the substance of a business. In those situations even the question of whether you must file needs professional thought, and letting it drift past the filing period costs more than dealing with it.
The flip side is that you cannot answer the question without being able to total the year up. If you do not know whether there is a gain or a loss, there is nothing to judge. Treat collecting history and calculating as work that comes before the decision, not after it.
Watch out for
- · This page is a general orientation, not tax advice
- · Whether you must file turns on your own circumstances — do not conclude from this page that you need not
- · Rules change; take the current position from National Tax Agency guidance
Frequently asked questions
Could a year with only losses still require a return?
A loss does not automatically mean there is nothing to do. It depends on your other income and on whether you are filing for some other reason anyway. Check the National Tax Agency's guidance for your case and ask the tax office or a tax accountant.