Do You Need a Tax Return for Spot Work in Japan? A Case-by-Case Guide
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Category: Side Jobs, Work Styles
Authors: Shusaku Yosa
Whether you need to file a tax return for spot work in Japan depends on more than how many days you worked or which apps you used. First establish whether you received salary or fees for contracted work, then total the relevant income for the same calendar year.
Employees with a side job and people whose main income comes from part-time or spot work do not necessarily use the same filing test. This guide focuses on Japanese income tax for 2026 and explains a practical checking sequence. Resident tax requires a separate check even when an income tax return is unnecessary.
Start by distinguishing salary from contracted-work fees
Money earned under an employment contract while working under an employer's direction is normally salary. Fees for work accepted outside an employment relationship are generally treated as business or miscellaneous income, depending on the circumstances. Check the contract, notice of working conditions, and payment documents instead of deciding from the service's name.
- Salary: Check the gross payment amount, or shiharai kingaku, on the salary withholding slip (gensen choshu hyo). Bank deposits alone can omit withheld tax and other deductions.
- Contracted work: Record revenue separately from necessary business expenses. Income used for tax calculations is generally revenue minus those expenses.
Do not freely subtract commuting costs or work supplies from salary as though they were freelance expenses. Salary has a separate system, including the employment income deduction.
What should you check for your situation?
Work situation | Income tax filing check | Information to gather |
|---|---|---|
Main job and spot work both pay salary | Salary not covered by year-end adjustment, plus income other than salary and retirement income | Withholding slips from the main and side jobs |
Main job pays salary; side work is contracted | Total income other than salary and retirement income | Revenue, expenses, and records of tax withheld from fees |
Student or other worker mainly earning spot-work salary | Annual tax calculated from all employers' salaries and applicable deductions | Every salary withholding slip for the same year |
No salary; main earnings are from contracted work | Annual tax calculated from income and deductions | Revenue and expense records and deduction documents |
The ¥200,000 rule is a filing exception for certain salary earners, not a general tax-free allowance. It does not mean that everyone earning less than this amount from side work can ignore tax procedures.
Employees receiving salary from spot work
For people paid by multiple employers, with all salary subject to withholding, the usual filing test combines salary not covered by year-end adjustment with other income excluding salary and retirement income. If the total exceeds ¥200,000, a return is generally required. Having the main job adjusted does not necessarily settle side-job tax.
For example, ¥240,000 of spot-work salary exceeds that threshold. With ¥150,000 and no other income, filing may be omitted if no other filing requirement applies.
A lower-income exception also exists: total salary less specified income deductions must be no more than ¥1.5 million, and income other than salary and retirement income must not exceed ¥200,000. The specified deductions exclude the basic deduction, medical expenses, casualty losses, and donations. Annual salary above ¥20 million is another filing trigger. See the National Tax Agency's salary-earner filing conditions.
Students and people mainly relying on spot-work salary
The employment income deduction does not apply separately to each employer. Add the gross payments on every salary withholding slip for the same year before calculating it.
For Japanese tax residents whose only income is salary, annual salary of up to ¥1.78 million generally results in no income tax for 2026 and 2027, based on the ¥740,000 employment income deduction and ¥1.04 million basic deduction. The amendment takes effect on December 1, 2026, and applies from the 2026 tax year. The comparable figure for 2025 was ¥1.6 million. Do not use the old ¥1.03 million figure as the current threshold for your own income tax.
These amounts concern the individual's income tax calculation. Resident tax, tax-dependent treatment for a parent or spouse, and health-insurance dependent status have separate conditions. The ¥1.78 million figure cannot be applied unchanged if you also have freelance or other income. See the National Tax Agency's guidance on the basic deduction and employment income deduction.
Even if your final annual income tax is zero, tax may have been withheld during the year. A refund return may recover it. Check whether you must file and whether filing could produce a refund as separate questions.
An example combining salary and contracted work
Suppose an employee whose main salary has undergone year-end adjustment earns ¥120,000 in spot-work salary and has separate freelance revenue of ¥150,000 with ¥50,000 in necessary expenses. The filing-test total is ¥120,000 in salary plus ¥100,000 in freelance income, or ¥220,000. Each job can be below ¥200,000 while their combined amount exceeds it.
This is an illustrative calculation. Also check lower-income exceptions, other income, and separate filing requirements. If you combine agency employment with side work, see tax returns for agency workers with side jobs for calculations and paperwork.
Resident tax and refund returns: two common oversights
The income tax filing exception does not apply to resident tax in the same way. However, a separate resident tax declaration may be unnecessary if employers have submitted salary payment reports to the municipality and you have no other income, for example. If you will not file an income tax return, ask your municipality using your income types and amounts. Yokohama City's resident tax guidance provides an example of municipal guidance.
If you file to claim medical expense deductions or another adjustment, include side income that would otherwise qualify for the filing exception. See the National Tax Agency's explanation of the filing exception.
Documents and steps to prepare
- List all work for the relevant year, recording the payer and whether each payment is salary or a contracted-work fee.
- Obtain salary withholding slips using the employer's or service's instructions. Contact the issuer if a slip is unavailable.
- Organize freelance revenue, necessary expenses, withheld tax, and documents for applicable deductions.
- Use the version of the National Tax Agency's Tax Return Preparation Corner for the correct year and enter all income and deductions.
- If filing and payment are required, follow that year's filing period and payment deadline. If you do not file an income tax return, still check resident tax procedures.
Keep annual documents rather than relying only on app deposit histories. Start with a simple list of this year's workplaces and contract types; it will make multiple jobs much easier to organize.
