Offshore Forex Losses in Japan: Carry-Forward and Offset Rules
For residents of Japan, offshore forex losses can't be carried forward to later years. According to the National Tax Agency, the three-year carry-forward applies only to futures-type income from trading with registered Japanese firms; offshore forex is ordinary miscellaneous income. Losses can be offset only within miscellaneous income in the same year: against profit at another offshore broker or other side income, but not against salary or profit from a Japanese FX broker.
Who this guide is for
This guide is for people who live in Japan and trade with an offshore broker, which Japan’s tax rules treat differently from a registered Japanese broker. If you live elsewhere, see the general forex tax guide; loss rules vary a lot by country.
No carry-forward for offshore losses
The National Tax Agency explains that losses on futures-type miscellaneous income (sakimono torihiki ni kakaru zatsu shotoku tō) that can’t be used in the year “can be deducted from futures-type miscellaneous income in each of the following three years” (NTA Tax Answer No. 1521).
That special treatment covers trades where the counterparty is a registered Japanese financial instruments business (a Type I firm) or a registered financial institution. A broker that isn’t registered in Japan doesn’t qualify, so its profit and loss is, in principle, miscellaneous income taxed together with your other income. The consequence: an offshore forex loss can’t be carried into next year.
What can be offset, and what can’t
The NTA states that “a loss arising in the calculation of miscellaneous income cannot be offset against other income” (NTA Tax Answer No. 1500), and that cross-category offsetting is limited to losses from real estate, business, capital transfers and timber (NTA Tax Answer No. 2250).
| Combination | Can be offset? |
|---|---|
| Profit at offshore broker A and loss at offshore broker B | Yes (both miscellaneous income) |
| Offshore forex loss and other miscellaneous income (e.g. side-job fees) | Yes |
| Offshore forex loss and salary | No |
| Offshore forex loss and profit at a registered Japanese FX broker | No |
| Offshore forex loss and gains on listed shares | No |
| This year’s offshore loss and next year’s profit | No (no carry-forward) |
A worked example
Say your miscellaneous income for one year is:
- Offshore broker A: +¥800,000
- Offshore broker B: −¥500,000
- Side-job writing fees (miscellaneous income, after expenses): +¥100,000
Your miscellaneous income for the year is +¥400,000, and that’s what you declare. If you’re an employee and the total had come to ¥200,000 or less, you might not need to file a national return, though resident tax still applies: see the ¥200,000 rule.
Now say the following year you lose ¥1,000,000 on offshore forex and have no other miscellaneous income. That loss can’t be set against the previous year’s ¥400,000 or against any profit in later years. It simply disappears for tax purposes.
Why this matters when choosing a broker
Because profit is taxed at your marginal rate (up to 45% national tax plus resident tax) while losses can’t be carried forward, a volatile offshore trading record can cost more tax over several years than the same net result at a registered Japanese broker, where a flat rate and a three-year carry-forward apply. That’s one of the main trade-offs covered in domestic vs offshore brokers.
Keep a record of every closed trade, swap and expense for each broker, so you can total the year’s result correctly. Expenses reduce the figure you’re taxed on: see deductible expenses for offshore forex traders.
Estimate the tax
To see what a profitable year adds to your tax bill, use the Japan offshore forex tax calculator. It applies the NTA rate table and the standard resident tax rate.
This guide explains the general rules only. For your own situation, ask your local tax office or a licensed tax accountant (zeirishi).
Related
- Japan Offshore Forex Tax Calculator: Estimate Your Tax
- Forex Deposit Methods Compared: Card, Bank and Crypto
- How to Fund a Forex Account With USDT
- bitwallet for Forex Deposits and Withdrawals: How It Works
- Forex Brokers That Accept Korean Won (KRW) Deposits
- Forex Withdrawal Problems: Causes and Fixes
- Why Brokers Reject Withdrawals and How to Avoid It
- Forex Trading Tax: What You Owe by Country
- Japan's ¥200,000 Rule for Offshore Forex Profits Explained
- Deductible Expenses for Offshore Forex Traders in Japan
- When Korean Residents Must Report Offshore Forex Accounts
- Funding a Forex Account by Credit Card: What to Know
- Do Offshore Brokers Ask Japanese Clients for a My Number?
- Funding a Forex Account in Thai Baht: PromptPay and Thai Banks
- Funding a Forex Account in Ringgit: FPX, DuitNow and Local Banks
- Funding Forex in Indonesian Rupiah: Banks, QRIS and E-wallets
- Forex Glossary
Frequently asked questions
Can I offset offshore forex losses against my salary?
No. The NTA states that a loss arising in miscellaneous income can't be offset against other categories of income.
Can I combine results from several offshore brokers?
Yes. They're all miscellaneous income, so ¥500,000 profit at one broker and a ¥300,000 loss at another gives ¥200,000 of income for that year.
Can an offshore loss offset profit from a Japanese FX broker?
No. Domestic FX with a registered firm falls under separately taxed futures-type income; offshore forex is miscellaneous income taxed with your other income. The NTA treats them as separate.
Do I need to file in a year I only made a loss?
An offshore forex loss alone can't be carried forward, so filing it doesn't change your tax. If you have other miscellaneous income that year, you net them and declare the combined figure.
