Who Needs to File a Tax Return in Japan 2026: Complete Checklist

Disclaimer: This article provides general information about Japanese tax returns for 2026. For specific tax advice, please consult a licensed tax accountant (zeirishi) or your local tax office. Tax laws are subject to change—always verify current requirements at the National Tax Agency website.

Introduction: Do I Need to File a Tax Return?

Every year during February and March, many people in Japan wonder: "Do I need to file a tax return (kakutei shinkoku)?" This question is especially important for 2026 (Reiwa 8) tax returns, as significant changes have been introduced—including the expansion of the "1.03 million yen wall" to "1.23 million yen."

This comprehensive guide explains who must file, who doesn't need to file, and who would benefit from filing voluntarily. Use our 30-second checklist to quickly determine your filing requirements, then dive into the detailed explanations for your specific situation.

30-Second Self-Assessment Checklist

Use this quick checklist to determine if you need to file a tax return in Japan.

You MUST File If Any of These Apply:

• You are self-employed or a freelancer with business income
• Your annual salary exceeds 20 million yen
• You receive salary from two or more employers
• Your side income exceeds 200,000 yen
• You have rental property income
• You have stock/FX profits (in non-withholding accounts)
• Your pension exceeds 4 million yen OR other income exceeds 200,000 yen
• You received retirement income without submitting the declaration form

Filing Is Optional But May Benefit You If:

• Medical expenses exceeded 100,000 yen this year
• You donated to 6+ municipalities via Furusato Nozei
• This is your first year claiming the mortgage deduction
• You resigned mid-year without year-end adjustment
• You had stock losses (for loss carryforward)
• You suffered losses from disaster or theft

Who MUST File: 8 Mandatory Categories

1. Self-Employed and Freelancers

If your business income exceeds the basic deduction (480,000 to 950,000 yen), you must file a tax return. Starting in 2026, the basic deduction has been expanded up to 950,000 yen for lower-income earners, with gradual reduction for higher incomes.

2. Salary Over 20 Million Yen

Employees earning more than 20 million yen annually are not eligible for year-end adjustment and must file a tax return.

3. Multiple Employers

If you receive salary from a secondary employer exceeding 200,000 yen annually, you must file.

4. Side Income Over 200,000 Yen

Income from blogs, affiliate marketing, freelance platforms, cryptocurrency, or selling items online that exceeds 200,000 yen requires filing.

Important: Even if under 200,000 yen, you still need to file a separate residence tax declaration.

5. Real Estate Income

Any income from apartment rentals, parking lots, or vacation rentals (minpaku) requires filing.

6. Stock and FX Profits

7. Pension Recipients

8. Retirement Income Recipients

If you did not submit the "Declaration for Receiving Retirement Income" to your employer, you must file a tax return. If you did submit it, filing is generally unnecessary unless you want to claim additional deductions.

Who Does NOT Need to File

Regular Employees

• Annual salary is 20 million yen or less
• Receive salary from only one employer
• Other income is 200,000 yen or less
• Completed year-end adjustment

Pension Recipients

• Public pension income is 4 million yen or less
• Other income is 200,000 yen or less

Homemakers and Unemployed

• Income is at or below the basic deduction (480,000-950,000 yen)
• Only income is from tax-withheld sources

Optional But Beneficial: 6 Cases for Voluntary Filing

1. Medical Expense Deduction

If your annual medical expenses exceeded 100,000 yen (or 5% of income if income is under 2 million yen), you can claim a refund. The Self-Medication Tax System for OTC medicines also qualifies.

2. Furusato Nozei to 6+ Municipalities

The One-Stop Exception only covers up to 5 municipalities. If you donated to 6 or more, you must file to claim the deduction.

3. First Year of Mortgage Deduction

The first year of housing loan deduction requires filing. From the second year, it can be processed through year-end adjustment.

4. Mid-Year Resignation

If you quit without completing year-end adjustment, you may be eligible for a tax refund on over-withheld taxes.

5. Stock Losses

To use loss offsetting (against other gains) or loss carryforward (up to 3 years), you must file a tax return.

6. Disaster or Theft Losses

You can claim the casualty loss deduction or relief under the Disaster Tax Reduction Law.

2026 Tax Changes: 3 Key Points

1. Expanded Basic Deduction (Up to 950,000 Yen)

The basic deduction, previously fixed at 480,000 yen, is now up to 950,000 yen for lower-income earners. This makes it easier for part-time workers to remain tax-free.

2. The "1.03M Wall" Becomes "1.23M Wall"

With the employment income deduction (550,000 yen) + expanded basic deduction (up to 950,000 yen), income up to 1.5 million yen can be tax-free (for those with total income of 1.32 million or less).

3. Filing Period

The filing period for 2026 tax returns is expected to be February 16 - March 15, 2027.

Filing Requirements by Situation

Employees

Freelancers / Self-Employed

Pension Recipients

Students

Homemakers

Frequently Asked Questions

Q1. What happens if I don't file when required?

A. Failing to file when required results in penalties:

• No-filing penalty: 15-20% of tax owed
• Late payment interest: 7.3-14.6% annually
• Severe cases: Heavy penalty tax (35-40%) or criminal charges

Q2. If I file income tax, do I still need to file residence tax?

A. No. Your income tax return data is shared with your municipality, so a separate residence tax declaration is unnecessary. However, if your side income is under 200,000 yen and you don't file income tax, you must file residence tax separately.

Q3. Is filing difficult? Can I do it myself?

A. For employees and pension recipients, filing has become much easier with e-Tax and the NTA's online preparation tools. Self-employed individuals may benefit from accounting software. The tax office also offers free consultation during filing season.

Q4. What if I miss the deadline?

A. You can still file after the deadline (late filing), but penalties may apply. For refund claims, you have 5 years to file without penalties.

Q5. What if I made a mistake?

A. Before the deadline, submit a corrected return. After the deadline, file an amended return if tax increases, or request a correction (within 5 years) if tax decreases.

Required Documents Checklist

Everyone

• My Number Card (or notification card + photo ID)
• Bank account information for refunds
• Previous year's tax return copy (if available)

Employees

• Withholding tax slip (gensen choshuhyo) from all employers

Freelancers / Self-Employed

• Income and expense statement or Blue Form financial statement
• Receipts for business expenses
• Copies of invoices and contracts

For Deductions

• Medical expense receipts and summary
• Furusato Nozei donation receipts
• Mortgage balance certificate and property registration
• Life insurance and earthquake insurance deduction certificates
• Social insurance (pension, health insurance) deduction certificates

Summary

The 2026 tax year brings significant changes, including expanded basic deductions and the effective raising of the "1.03 million yen wall."

Key Takeaways

• Freelancers and self-employed individuals generally must file
• Side income over 200,000 yen or salary over 20M yen requires filing
• Medical expenses and Furusato Nozei (6+ municipalities) can get you a refund
• Basic deduction expanded to up to 950,000 yen from 2026
• Filing period: February 16 - March 15, 2027 (expected)

When in doubt, consult a tax professional or visit your local tax office for guidance.

Related Articles

• What Is Kakutei Shinkoku? Complete Beginner's Guide 2026
• Freelancer's Complete Guide to Blue Form Tax Filing
• Digital Receipt Management Guide 2026
• Medical Expense Deduction: How to Apply and What Qualifies

References

• NTA | Filing a Final Tax Return
• NTA | Tax Return Information (Japanese)
• NTA | Basic Deduction (Japanese)
• e-Tax (National Tax Electronic Filing System)