Japan Crypto Tax Calculator
Estimate Japan crypto capital gains tax using a simplified 2025 National Tax Agency model.
How to Calculate Crypto Capital Gains Tax in Japan
Japan's National Tax Agency (NTA) classifies cryptocurrency gains as miscellaneous income (雑所得), which is subject to both national progressive income tax and a flat 10% local inhabitant tax. The national rates range from 5% to 45% depending on your total income, meaning high earners can face combined rates exceeding 55%. Unlike some jurisdictions, Japan does not offer a holding period discount for crypto, and losses cannot be offset against salary or other income types. Accurate record-keeping in yen is mandatory for all transactions.
The Japan Crypto Tax Estimator uses the NTA miscellaneous income model for 2025. Gains are calculated as: Gain = (Selling Price − Purchase Price) × Quantity. This gain is classified as miscellaneous income and added to your other income to determine your national tax bracket. The national progressive rates are 5% on income up to ¥1,950,000, 10% up to ¥3,300,000, 20% up to ¥6,950,000, 23% up to ¥9,000,000, 33% up to ¥18,000,000, 40% up to ¥40,000,000, and 45% above that. In addition to national tax, a flat 10% local inhabitant tax is applied to the same miscellaneous income base. The calculator computes the incremental national tax by comparing your total tax before and after adding the crypto gain, then adds the 10% local tax on the gain amount. Social insurance deductions and special deductions are excluded from this simplified model. All transactions must be converted to yen using the exchange rate on the transaction date.
Track your gains throughout the year using the Profit/Loss Calculator so you are prepared for end-of-year tax filing. To work out your cost basis across multiple buys, use the DCA calculator.
Japan Tax Rules at a Glance
Example Calculations
Example A: Moderate Gain for Salaried Worker
You bought 0.5 BTC at ¥4,000,000 and sold at ¥6,000,000. Your salary is ¥5,000,000/year.
Example B: High-Income Earner
You bought 2 ETH at ¥500,000 and sold at ¥1,200,000. Your salary is ¥15,000,000/year.
Example C: Small Gain at Low Rate
You bought 0.1 BTC at ¥3,000,000 and sold at ¥3,500,000. Your salary is ¥3,000,000/year.
Filing Guide — National Tax Agency
Japanese taxpayers must file a final tax return (Kakutei Shinkoku) by 15 March if they have miscellaneous income from crypto that is not handled through year-end adjustment at their employer. Salaried workers with only employment income may not be familiar with tax filing, but crypto gains require a separate declaration. Use Form A or Form B depending on your income sources. Estimated quarterly tax payments (provisional tax) may be required if your prior year's tax exceeded a certain threshold.
Common Mistakes to Avoid
A frequent Japanese mistake is assuming crypto losses can offset salary income, which is not permitted under the miscellaneous income classification. Another error is failing to convert all transactions to yen using the exchange rate on the transaction date, as required by NTA guidelines. Many taxpayers also overlook the 10% local inhabitant tax when budgeting for their tax liability. Not filing a final tax return because you are a salaried employee is a serious oversight if you have crypto gains.
Official Resources
The following links point to official NTA guidance on cryptocurrency taxation in Japan:
- NTA: Tax Answer No.1528 — guidance on miscellaneous income including crypto (Japanese)
- NTA: Virtual Currency Pamphlet (PDF) — official pamphlet on virtual currency taxation (Japanese)
Related Resources
Before you can file your crypto taxes, you need to know your profit or loss. Use our Profit/Loss Calculator to track gains and losses for every trade.
Read our comprehensive Crypto Tax Guide for a global overview of how cryptocurrency is taxed, including DeFi, staking, and filing best practices.
Japan Crypto Tax Estimator — FAQ
How does Japan classify crypto for tax purposes?
The NTA classifies cryptocurrency gains as miscellaneous income (雑所得), not capital gains. This means they are added to your other income and taxed at progressive national rates plus a 10% local inhabitant tax.
Can I offset crypto losses against my salary in Japan?
No. Under the miscellaneous income category, crypto losses can only offset other miscellaneous income in the same year. They cannot offset salary, business income, or real estate income.
What exchange rate should I use for crypto calculations?
The NTA requires using the market exchange rate on the date of each transaction. For major cryptocurrencies, you can use the daily closing price from reputable exchanges. Keep records of the rate source you used.
Do I need to file a tax return if I am a salaried employee?
Yes, if you have crypto gains that are not handled through your employer's year-end adjustment. You must file a final tax return (Kakutei Shinkoku) by 15 March, even if your employer handles your salary tax withholding.
Are crypto-to-crypto swaps taxable in Japan?
Yes. Exchanging one cryptocurrency for another is a taxable event. You must calculate the yen fair market value of the crypto received at the time of the swap and report any gain or loss.
What is the combined maximum tax rate on crypto in Japan?
The highest national income tax rate is 45%, and the local inhabitant tax is 10%, for a combined maximum of 55% on miscellaneous income. Social insurance deductions may reduce the taxable base slightly.