How to File a Tax Return in Japan as a Foreigner

Filing a tax return in Japan, known as kakutei shinkoku (確定申告), can feel overwhelming for foreigners navigating the system for the first time. Whether you're an employee with side income, a freelancer, or leaving Japan mid-year, understanding the process is essential to staying compliant and potentially getting money back. This guide walks you through everything you need to know about filing your tax return in Japan as a foreigner.

Do You Actually Need to File a Tax Return?

Not every foreigner in Japan needs to file a tax return. If you work for a single employer and earn under ¥20 million per year, your company likely handles everything through the year-end adjustment (nenmatsu chosei / 年末調整). However, you must file a tax return if any of the following apply:

• You worked for multiple employers during the year
• Your side income exceeds ¥200,000 (freelance work, investments, rental income)
• Your annual salary is over ¥20 million
• You are self-employed or a freelancer
• You left Japan before the end of the tax year
• You want to claim deductions not covered by your employer's year-end adjustment
• You earned income from overseas sources (for permanent residents)

If none of these apply and your employer completed the year-end adjustment, you generally do not need to file. For more details on the broader tax system, check out our complete guide to taxes in Japan.

Understanding Japan's Income Tax Rates

Japan uses a progressive tax system for national income tax, meaning the more you earn, the higher the rate on your additional income. Here are the current tax brackets:

On top of national income tax, a 2.1% Special Reconstruction Income Tax applies through 2037 to fund recovery from the 2011 earthquake. You also pay resident tax (juminzei) of approximately 10%, which is billed the following year from June. Non-residents pay a flat rate of 20.42% on Japan-source income with no deductions available. For guidance on managing your finances, see our banking and finance guide for foreigners.

Key Deadlines and Filing Period

The annual tax filing period in Japan runs from February 16 to March 15 each year. You file for income earned during the previous calendar year (January 1 to December 31). Missing the deadline can result in penalties and interest charges.

Important dates to remember:

• January: Gather your withholding tax certificate (gensen chosuhyo / 源泉徴収票) from your employer
• February 16: Filing period opens
• March 15: Filing deadline and tax payment deadline
• June: Resident tax bills arrive (for previous year's income)

If you're planning to leave Japan permanently, you should file your return before departure or appoint a tax representative (nozei kanrinin / 納税管理人) to handle it on your behalf. Learn more about preparing for your move in our guide to moving to Japan.

How to File: Three Methods Explained

There are three main ways to file your tax return in Japan:

Method 1: In Person at the Tax Office

Visit your local tax office (zeimusho / 税務署) during the filing period. Bring all your documents and a staff member will help you complete the forms. Expect to wait 1-2 hours during peak times. Tax offices sometimes have English-speaking staff, but this is not guaranteed.

Method 2: By Mail

Complete your tax return forms and mail them to your local tax office using registered mail (kakitome / 書留). This gives you proof of submission. You can download forms from the National Tax Agency website.

Method 3: e-Tax (Electronic Filing)

The NTA's e-Tax system allows you to file online using a computer or smartphone. You'll need either a My Number card with an IC card reader, or an e-Tax ID and password obtained from a tax office visit. The e-Tax interface is primarily in Japanese, though the NTA provides English-language guidance. For a detailed walkthrough on using e-Tax, read more on Living in Nihon.

Documents You Need to Prepare

Before filing, gather the following documents:

• Withholding tax certificate (gensen chosuhyo / 源泉徴収票) from each employer
• My Number card or notification card with photo ID
• Bank account information for tax refunds
• Receipts for deductions: medical expenses, social insurance payments, life insurance certificates
• Income records from side work, freelancing, or overseas sources
• Seal (hanko/inkan) — though increasingly optional for digital filing

If you're a freelancer or business owner, you'll also need records of all business income and expenses. Understanding your work situation in Japan helps determine which documents apply to you.

Tax Deductions Every Foreigner Should Know

Taking advantage of deductions can significantly reduce your tax bill. Here are the most important ones:

Basic Exemption

All taxpayers receive a basic exemption of ¥580,000 (increased from ¥480,000 starting with 2025 income). This is automatically applied.

Employment Income Deduction

Salaried employees receive an automatic deduction with a minimum of ¥650,000 (raised from ¥550,000 for 2025 income). The actual amount scales with your salary.

Social Insurance Deduction

All premiums paid for health insurance, pension (nenkin), and employment insurance are fully deductible. This is one of the largest deductions for most workers.

Medical Expense Deduction

If your household's medical expenses exceed ¥100,000 (or 5% of income if lower) in a year, you can deduct the excess amount up to ¥2 million. Keep all receipts from hospitals, pharmacies, and dental visits. Our healthcare guide explains the medical system in detail.

Dependent Deduction

If you financially support family members — including those living overseas — you may claim dependent deductions. The amount varies: ¥380,000 for general dependents, ¥630,000 for specific dependents (age 19-22), and ¥480,000 for elderly dependents.

Foreign Tax Credit

If you're taxed on the same income in both Japan and your home country, you can claim a foreign tax credit to avoid double taxation. Japan has tax treaties with over 70 countries. For more details, see the complete tax and social insurance guide at For Work in Japan.

White Form vs. Blue Form: Which Should You Choose?

If you're filing as a freelancer or business owner, you need to choose between the White Form (shiro iro shinkoku) and Blue Form (ao iro shinkoku):

The Blue Form offers significant tax savings but requires double-entry bookkeeping. You must apply for Blue Form approval by March 15 of the year before you want to use it. If you have side income from IT or freelance work, learn about when tax filing is required at Ittenshoku.

What Happens After You File

After submitting your tax return:

• If you owe taxes: Payment is due by March 15. You can pay at a bank, convenience store, or through online banking. Late payment incurs a penalty of 7.3-14.6% annually.
• If you're owed a refund: Refunds are typically processed within 1-2 months for paper filings and 2-3 weeks for e-Tax submissions. The refund is deposited directly into your Japanese bank account.
• Resident tax: Your local municipality will calculate your resident tax based on your return. Bills arrive in June, payable in four installments or through payroll deduction.

Understanding these timelines helps you plan your finances. Check out our cost of living guide for broader financial planning.

Leaving Japan: Special Tax Considerations

If you're departing Japan permanently, there are critical tax steps to take:

1. File before you leave or appoint a tax representative
2. Pay any outstanding resident tax — bills from the previous year may still arrive after departure
3. Claim your pension lump-sum withdrawal (if eligible): foreigners who contributed to nenkin for 6+ months but less than 10 years can request a refund after leaving, though 20.42% is withheld
4. Request a partial tax refund on the pension withdrawal through your tax representative

For a comprehensive overview of taxes and filing, visit GaijinPot's tax return guide or the Japan Handbook income tax guide.

Common Mistakes to Avoid

Many foreigners make avoidable errors when filing. Watch out for these:

• Forgetting to file when you have side income over ¥200,000
• Missing the March 15 deadline and incurring penalties
• Not claiming medical deductions for expenses over ¥100,000
• Overlooking dependent deductions for overseas family members
• Not appointing a tax representative before leaving Japan
• Filing in the wrong tax jurisdiction — file where you lived on January 1

Getting help from a bilingual tax accountant (zeirishi) is worthwhile if your situation is complex. Many offer consultation in English, especially in Tokyo and Osaka. For more on daily life logistics in Japan, browse our comprehensive guide.

Conclusion

Filing a tax return in Japan doesn't have to be stressful. Know whether you need to file, gather your documents early, and take advantage of every deduction available to you. Whether you choose to file in person, by mail, or through e-Tax, the key is to start preparing well before the March 15 deadline. If you're ever unsure, consulting a professional tax advisor who speaks your language is a smart investment that can save you money in the long run.