A thorough explanation of tax calculations, tax filing, and tax saving strategies for salaried workers trading overseas forex

If you are a salaried employee or receive a paycheck from your employer,you must file a tax return if your profits from overseas forex trading exceed approximately $1,250.

Tax filing is a procedure that, in principle, takes place from February 16th to March 15th, where you declare your income from January 1st to December 31st of the previous year and calculate your taxes

Profits from overseas forex trading are subject to comprehensive taxation, meaning that a progressive tax system applies, where the tax rate increases with higher income

Therefore, this article will explain how to calculate taxes on overseas forex trading, provide simulations based on annual income, and discuss what salaried employees should be aware of when filing their tax returns

*This article was created by the MoneyCharger editorial team in accordance with their content creation policy , based on publicly available information from the National Tax Agency (as of August 2026, and based on the system for the 2025 tax year and beyond). Since tax amounts and deductions vary depending on individual circumstances, we recommend checking the latest information from the National Tax Agency or consulting with a tax professional before filing your tax return. For precautions regarding the use of overseas FX brokers, please also check the information published by the Financial Services Agency , and for consumer troubles, please check the information published by the Consumer Affairs Agency

For a complete overview of taxes on overseas forex trading, please read the "Complete Guide to Overseas Forex Taxes ."

A must-read for salaried workers! Rules regarding taxes and tax filing for overseas forex trading

Let's get straight to explaining the tax and tax filing rules for overseas forex trading that salaried workers should know

Taxes are levied when your annual profit exceeds approximately $1,250

Salaried employees and others who receive a salary are required to pay taxes if they earn more than approximately $1,250 in profits from overseas forex trading annually

Since taxes on overseas forex trading are calculated by combining it with other income such as salary,you will need to file a tax return if your annual profits exceed approximately $1,250.

The following are the individuals and conditions under which you are required to file a tax return if you have made a profit from overseas forex trading

<Salaried employees>

Target audience	- Individuals who receive a salary from their employer, such as company employees, part-time workers, or temporary workers.- Individuals who have income from public pensions, etc.
conditions	If your annual income from sources other than your salary exceeds approximately $1,250

This is for non-salaried individuals who are not company employees

<Non-salaried employees>

Target audience	Unemployed individuals, self-employed individuals, housewives, students, and others who do not receive a salary
conditions	If your total annual income, including income from overseas forex trading, exceeds approximately $5,938 (basic deduction amount, for fiscal year 2025 and later)

An important point to note isincome from sources other than overseas forex trading is also included in the criteria for filing a tax return. If you have other sources of income, you will need to file a tax return if the total exceeds approximately $1,250.

The "approximately $1,250 rule" is a special exception for income tax only.This rule does not apply to local inhabitant tax, so even if your profits from overseas forex trading are less than approximately $1,250 and you are not required to file an income tax return,required to file a local inhabitant tax return with your local municipality. This is an easily overlooked point, so please be careful.

<Note: This does not apply to the time of withdrawal.>

Taxes on overseas forex trading are incurred not when you withdraw funds from your overseas forex broker account, but whenyour position is closed and the profit or loss is reflected in your account.

Even if you haven't withdrawn the funds, be aware that the profits and losses from closed positions are still subject to taxation

Please note that profits from overseas forex trading are not included in your company's year-end tax adjustment . Since year-end tax adjustment is a settlement procedure related to salary, if your overseas forex profits exceed approximately $1,250 in a given year, you will need to file a separate tax return in addition to the year-end tax adjustment.

If your salary income is low, you may not need to file a tax return because of deductions

If your annual income from part-time or temporary work is low, you may not need to file a tax return due to deductions.

For example, in the following cases, no income tax is levied, and a tax return is not required (this applies to the system for the year 2025 and later)

• The annual salary for part-time workers is approximately $4,063
• Profits earned from overseas forex trading are less than approximately $5,938 per year

Calculation formula:
Annual salary approx. $4,063 - Salary income deduction approx. $4,063 = Salary income approx. $0.00
Salary income approx. $0.00 + Overseas FX approx. $5,938 = Total income approx. $5,938
Total income approx. $5,938 - Basic deduction approx. $5,938 = Taxable income approx. $0.00

With the tax reform at the end of 2025, the minimum guaranteed amount for the salary income deduction was raised to approximately $4,063, and the basic deduction was raised to a maximum of approximately $5,938 (for total income of approximately $8,250 or less). In the case of a salary of approximately $4,063,if the profit from overseas forex trading is approximately $5,938 or less, the taxable income will be approximately $0.00, so there is no need to file a tax return.

The amount of the basic deduction varies in stages depending on your total income (approximately $8,250 or less: approximately $5,938 and above.IRS | Basic Deduction).

How much tax do you have to pay on overseas forex trading? Tax rates, calculation methods, and how to file your tax return [Supervised by a tax accountant]

The tax category is "miscellaneous income"! Progressive taxation applies, where the tax rate increases as you earn more

Profits from overseas forex trading are classified as miscellaneous income, and therefore, progressive taxation applies when calculating taxes

Progressive taxation is a system where the more profit you earn, the higher your taxes become,with tax rates set in seven stages according to your taxable income.

Income tax table

Taxable income	tax rate	Deduction amount
From approximately $6.25 to approximately $12,181	5％	approx. $0.00
From approximately $12,188 to approximately $20,619	10％	approx. $609.38
From approximately $20,625 to approximately $43,431	20％	approx. $2,672
From approximately $43,438 to approximately $56,244	23％	approx. $3,975
From approximately $56,250 to approximately $112,494	33％	approx. $9,600
From approximately $112,500 to approximately $249,994	40％	approx. $17,475
Approximately $250,000 or more	45％	approx. $29,975

Source: Income Tax Rates | National Tax Agency

Unlike overseas forex trading, profits earned from domestic forex trading are subject to separate taxation. This system calculates income tax based solely on profits from domestic forex trading, without combining them with other income such as salary income

The tax rate for separate taxation is a flat 15% income tax and 5% local inhabitant tax, totaling 20%. Until 2037, a special reconstruction income tax rate will be added on top of this, bringing the total tax rate to 20.315%

The taxes incurred will be added on top of your salary income

Since overseas forex trading and salary income are subject to comprehensive taxation,income tax is calculated by multiplying the combined taxable income (overseas forex trading and salary) by the tax rate.

If you have any other sources of income besides overseas forex trading, your income tax will be calculated based on your total taxable income, including any profits or losses from those sources

The following eight types of income are subject to comprehensive taxation:

1. Interest income
2. Dividend income
3. Real estate income
4. business income
5. Salary income
6. Capital gains
7. temporary income
8. Miscellaneous income

for these eight types of income,income tax is calculated by multiplying the total taxable income by the tax rate. However, certain business income, capital gains, and miscellaneous income from futures trading (items 4, 6, and 8) are subject to separate taxation, meaning income tax is calculated separately from other types of income.

If the items are subject to separate taxation, declare them separately; otherwise, declare all items subject to comprehensive taxation

How much tax do salaried workers pay on overseas forex trading? Simulation by annual income

In conclusion,for a salaried worker with an annual income of approximately $31,250, the additional tax on profits from overseas forex tradingis roughly 20-27% of the profit. The larger the profit, the higher the effective tax rate due to progressive taxation.

The tax calculation process consists of the four steps shown in the diagram above. Belowa company employee with an annual income of approximately $31,250 (salary income)who makes a profit from overseas forex trading.

Annual profits from overseas forex trading	Additional taxes (estimated)	Effective tax rate on profits
approx. $3,125	Approximately $625.00	Approximately 20%
approx. $6,250	Approximately $1,250	Approximately 20%
approx. $12,500	Approximately $3,125	Approximately 25%
approx. $18,750	Approximately $5,125	Approximately 27%

*Assumptions: Single, annual income approximately $31,250 (salary income deduction approximately $9,000), social insurance contributions approximately $4,500 (estimated at about 14% of annual income), income deductions are limited to social insurance contributions and basic deductions only. This is an estimate calculated using income tax (with quick calculation deduction applied) + reconstruction special income tax 2.1% + local inhabitant tax 10%, with fractions and the flat-rate portion of local inhabitant tax omitted (calculated using the basic deduction for 2025-2026, as of August 2026)

Calculation example: Annual income approx. $31,250 + overseas forex profits approx. $6,250

As the basis for the simulation, we will show the calculation process for the case where the profit is approximately $6,250

[① Total Income]
Salary Income: approx. $31,250 - approx. $9,000 (Salary Income Deduction) = approx. $22,250
Total Income: approx. $22,250 + approx. $6,250 (Profits from Overseas Forex Trading) = approx. $28,500

[② Taxable Income]
approx. $28,500 - approx. $4,500 (Social Insurance Deduction) - approx. $4,250 (Basic Deduction) = approx. $19,750

[③ Income tax/resident tax]
Income tax: approx. $19,750 × 10% − approx. $609.38 (accelerated deduction) = approx. $1,366
Special income tax for reconstruction: approx. $1,366 × 2.1% = approximately approx. $28.68
Resident tax: (approx. $28,500 − approx. $4,500 − approx. $2,688) × 10% = approx. $2,131

[④ Additional tax for FX]
Total tax: approx. $3,525 - Tax without FX: approx. $2,263 = Additional tax: approx. $1,250

If you want to calculate accurately based on your own annual income and profits, you can try using the National Tax Agency's tax return preparation section (an official calculation tool that can be used for free) or refer to the calculation procedure in the Complete Guide to Overseas Forex Taxes

Unrealized gains and losses are not subject to taxation

Unrealized gains or losses on open positions are not subject to taxation

subject to taxationthe total profit or loss realized after the positions are closed.

Therefore, positions that are not settled and whose profits or losses fluctuate due to exchange rate changes are not subject to tax filing

However, swap points received when adjusting for interest rate differences between currencies being bought and sold are subject to taxation when they are received and reflected in the account

Do I need to file a tax return for losses from overseas forex trading? This article explains how to offset gains and losses and how to fill out the tax return form

Losses cannot be carried forward in overseas forex trading

Losses incurred in overseas forex trading cannot be carried over to the following yearTherefore, losses incurred this year cannot be offset against income in subsequent yearsHowever, if it is within the same year, it is permitted to offset profits and losses from other overseas forex brokers and calculate taxable income If you use three overseas forex brokers in the same year Broker A: Loss of approximately $6,250 Broker B: Profit of $500,000 Broker C: Profit of $800,000 We offset Company A's loss of approximately $6,250 against Company B's profit of approximately $3,125 and Company C's profit of approximately $5,000, and calculate the tax on approximately $1,875

However, cashback is subject to taxation

Cashback received through FX broker campaigns and other promotions is considered temporary income and is subject to comprehensive taxation.

Therefore,if you receive a cashback,you must include it in your comprehensive tax calculation.

However, the entire amount of the cashback received is not subject to taxation as temporary income; the taxable amount is calculated using the following formula

Calculation formula for temporary income
: Cashback received - Expenses - Special deduction (approx. $3,125) = Temporary
income Calculation formula for taxable amount of temporary income:
Temporary income × 1/2 = Taxable amount of temporary income

The amount subject to tax is calculated by subtracting the special deduction of approximately $3,125 from the temporary income and then multiplying that amount by half

If you have other temporary income, add it to the taxable amount.If the taxable amount of temporary income exceeds approximately $1,250 for salaried employees, or the basic deduction amount for non-salaried employees, you will need to file a tax return.

Please note that in some cases, the cashback you receive can only be used as margin and cannot be withdrawn. However,cashback that cannot be withdrawn is not subject to taxation.

Do I need to file a tax return for cashback from overseas forex trading? This article explains the differences between overseas and domestic forex trading and points to note regarding tax filing

Depending on the type, bonuses may be subject to taxation

The "bonus campaigns" offered by many overseas forex brokers vary in whether or not they are subject to taxation, depending on the type

Bonuses that can be withdrawn as cash: Taxable.
Credits that can be used as margin: Tax-free.

In short, account opening bonuses and deposit bonuses are "credits" that cannot be withdrawn, so they are not subject to tax. However, loyalty programs and other bonusesthat can be converted into cash are subject to taxation.

If you are using MT4 or MT5, you can find out how much profit is taxable from your "Account History." Remember that "Total Profit/Loss" is taxable, while "Total Credit" is tax-exempt

Tax-saving strategies for overseas forex trading that salaried workers can implement

Record all expenses without fail

If you want to reduce the taxes on overseas forex trading , be sure to account for all your expenses

Please note thatpersonal consumables and private dining expenses are not deductible.The criteria should be based on expenses used for overseas forex trading and linked to sales.

The following items are eligible for expense deductions:

• Cost of purchasing a computer or smartphone to be used for trading
• Communication costs
• Related book and newspaper expenses
• Seminar participation fee (including transportation and accommodation expenses)
• Rent and utilities
• VPS contract costs for automated trading
• Transaction fees
• Equipment costs (stationery, desks, chairs, etc. for business transactions)

When reporting expenses,you will need supporting documents such as receipts, invoices, and bank transfer records.

Furthermore, if you are claiming expenses for computers, smartphones, etc., costing approximately $625.00 or more, you must spread the expense over several years. (Depreciation)

Cost of purchasing a smartphone or computer	Distribution method
Approximately less than $625.00	Lump-sum accounting
Approximately $625.00 or more, and less than approximately $1,250	Accounted over three years
Approximately $1,250 or more	Accounted over four years

List of expenses that can be deducted in overseas forex trading | Explanation of what percentage of rent and mobile phone bills should be claimed as expenses

Using income tax deductions

Even salaried employees can claim income deductions other than the basic deduction

Claiming deductions can reduce your tax liability, so be sure to check if you are eligible for any deductions before filing your tax return

The following are the income deductions available to salaried workers:

• Medical expense deduction
• Life insurance premium deduction
• Deduction for contributions to the Small Business Mutual Aid System, etc

Furthermore, you can also use the "furusato nozei" system, which offers gifts in return for your donation .

Pay your taxes with a credit card and earn points

You can choose how you pay your income tax, but you can earn points if you choose "credit card payment."

For example,if your income tax is approximately $6,250 and the points reward rate is 1%, you will receive 10,000 points. For those with a large income tax amount, paying taxes by credit card is also recommended.

7 Tax-Saving Strategies for Overseas Forex Trading: Explaining How to Reduce High Taxes and the Truth About Loopholes

Points to note when salaried workers pay taxes on overseas forex trading

This article explains important points for salaried workers when paying taxes on overseas forex trading

How to prevent your company from finding out about your FX profits...

There are two ways to keep your overseas forex trading profits a secret:

• I will pay the local tax on overseas forex trading through ordinary collection
• I don't tell my colleagues that I have a side job

Local resident tax is calculated based on taxable income from January 1st to December 31st of the previous year and is deducted from your basic salary through special collection

There are two ways to pay resident tax: "special collection," where it is deducted from your salary by your company, and "ordinary collection," where you pay it yourself

It's conceivable that the company's resident tax officer might find out if the amount of resident tax is significantly higher than the taxable income from your main job when they check your resident tax

As a countermeasure,choose to "pay the local tax on overseas forex trading yourself.

Furthermore, be careful, as there are cases where colleagues may report you to the company if you tell them about your side job or if they see notifications on your smartphone screen

Make sure to check the "Pay myself" box in the lower right corner of the second page of your tax return form

When filing your tax return , check the box to "pay the local tax on overseas forex trading yourself." This means that the local tax on overseas forex trading will be collected through ordinary collection, and you will be responsible for paying it yourself

Even if you select "pay yourself," your tax return may be mistakenly processed as special collection, so be sure to check with your city hall after filing your tax return

When filing your tax return, be sure to get your withholding tax statement from your company

When salaried employees and other wage earners file their tax returns, they need a withholding tax statement issued by their employer .

When filing your tax return for overseas forex trading, including other types of transactions, be sure to prepare the following four items

1. Withholding tax slip
2. Documents required to claim various tax deductions (such as insurance premium deductions and medical expense deductions)
3. Annual trading report for overseas forex trading
4. Receipts and invoices to be deducted as expenses

You will need to enter the amounts from these documents into your tax return, so having them ready beforehand will make the process smoother

A complete guide to filing your tax return for overseas forex trading! How to avoid losing money on taxes?

Be careful of late payment penalties for forgetting to pay taxes

The deadline for paying income tax is generally set for March 15th , which is the same day as the deadline for filing your tax return

If you forget to pay your taxes or miss the tax payment deadline, you may incur the following late payment penalties

If you file your tax return or pay your taxes after the deadline, you will be charged
a late payment penalty of 2.4% to 14.6%.

Failure to file a tax return may result in penalties such as a non-filing penalty tax or a heavy penalty tax

Failure to declare taxableincome: 15% to 20% penalty for non-filing
If there is gross negligence such asconcealing income: 35% to 40% penalty
filing is done after the deadline, or if there are missing documents or concealment: Revocation of blue return status or reduction of special deductions.

Be careful, as penalties could result in the revocation of your blue return status or the need to pay extra taxes

Make sure you have the funds to pay your taxes

To avoid being charged additional taxes such as late payment penalties,make sure you have the funds set aside to pay your taxes.

Income tax on profits from overseas forex trading during the previous year must generally be paid by March 15th of the following year. Instead of spending all of your previous year's profits, be sure to set aside funds for tax payments beforehand

Furthermore, under the ordinary collection system for resident tax, taxable income for the previous year is calculated, and the calculatedresident tax is paid in four installments starting from June of the following year.

Therefore, while special collection deducts resident tax in 12 installments, ordinary collection deducts it in 4 installments, which may result in a larger amount being paid at once

Since ordinary collection means you have to pay your resident tax yourself instead of having it deducted from your salary, make sure you manage your own funds for resident tax

[Overseas Forex] Frequently Asked Questions about Taxes for Salaried Workers

Here are answers to frequently asked questions regarding taxes on overseas forex trading

1. Will my company find out about my profits from overseas forex trading?
2. Can salaried workers file blue tax returns?
3. What is the deadline for paying taxes?
4. Can I combine profits and losses from domestic FX trading?

Let's check the items that interest you

Will my company find out about my profits from overseas forex trading?

your resident tax yourself" (ordinary collection) when filing your tax return, you can reduce the likelihood of your employer finding out through your resident tax notice.

The two main ways your company finds out about your side job are through an increase in your resident tax and by telling colleagues. The basic countermeasures are to opt for ordinary collection of your resident tax and not to discuss your side job at work. For more details, please see "How to prevent your company from finding out about your FX profits" in the main text. Also, some companies have rules regarding side jobs and investments in their employment regulations, so it's a good idea to check them beforehand

Can salaried workers file blue tax returns?

Salaried employees can also file blue tax returns

The main advantages of filing a blue return are as follows: You can enjoy benefits such as significant tax savings

• You can receive a special tax deduction of up to approximately $4,063 for blue-form tax returns
• Losses can be carried forward for three years, allowing them to be offset against profits in subsequent years

However, to file a blue return, you need to submit the following two applications:

• Notification of Commencement/Cessation of Business for Sole Proprietors
• Application for Approval of Blue Return Filing

Blue return filing is available to those with business income, real estate income, or forestry income.Profits from overseas forex trading are generally classified as "miscellaneous income," so forex profits themselves are not eligible for blue return filing. Please note that this system is intended for those with business income or similar sources.

For those filing blue-form tax returns, accounting records must be kept using double-entry bookkeeping, also known as proper bookkeeping . In addition, as a general rule, a balance sheet and financial statements must be submitted when filing

What is the deadline for paying taxes?

The deadline for paying income tax and other taxes is generally set for March 15th . Since this is the same day as the deadline for filing your tax return, it's best to file your tax return early to give yourself ample time to pay

Be aware that late tax payments may result in penalties such as late payment fees

Can I combine profits and losses from domestic FX trading?

Because overseas and domestic forex trading have different tax systems, profits and losses from each cannot be offset against each other

Overseas forex trading is subject to comprehensive taxation, where it is combined with other income, while domestic forex trading is subject to separate taxation, where income tax is calculated based on the profits from that trade alone

summary

This page explains the tax and tax filing rules for overseas forex trading that salaried workers should know

Finally, let's review the important points

• If your income other than salary exceeds approximately $1,250 per year, you are required to file a tax return (you are required to file a local tax return even if your income is less than approximately $1,250)
• Overseas forex trading is subject to progressive taxation, where the tax rate increases with higher profits. For an annual income of approximately $31,250, the additional tax would be roughly 20-27% of the profit
• Profits and losses from open positions are not subject to tax reporting
• To prevent my overseas forex trading from being discovered by my company, I pay my local resident tax myself

Overseas forex trading is subject to comprehensive taxation, meaning that taxes are calculated by combining it with your salary income. Therefore, salariedemployeesshould have their withholding tax statement issued by their company ready.

To reduce taxes on your salary income and side income,recommended to utilize expenses and various deductions. However, personal expenses incurred outside of overseas forex trading are not recognized as business expenses.

Since penalties may be incurred if you miss the filing or payment deadline, be sure to file your tax return with plenty of time to spare

Recommended Ranking of Overseas Forex Account Opening Bonuses [2026 Latest]: No Deposit Required (Approx. $93.75)