Understanding Japanese Taxes: Income Tax, Resident Tax, and Deadlines

2026年4月23日

Understanding Japanese Taxes: Income Tax, Resident Tax, and Deadlines

If you live and work in Japan, the most important point is this: income tax and resident tax are not the same bill. Income tax is a national tax on income for the calendar year. Resident tax is a local tax, usually billed from June, based on your income in the previous year and your address on January 1.

This is why many foreign residents feel a tax bill arrives “late.” It is not late. It is often resident tax catching up with last year’s income.

Quick orientation:

Income tax: national tax, usually handled through salary withholding and year-end adjustment, or by filing a final tax return.
Resident tax: local tax paid to the municipality where you were registered on January 1.
Main income tax filing season: generally February 16 to March 15 of the following year; for 2025 income, the National Tax Agency set the period as February 16 to March 16, 2026.
Resident tax bills: usually appear around June, and payment timing depends on whether your employer withholds it or you pay the city directly.

This guide is for workers, students with part-time jobs, freelancers, and long-term residents who need to understand what to expect, what documents matter, and what can go wrong when changing jobs or leaving Japan.

The Two Taxes Most Foreign Residents Notice First

Japan’s tax system has many parts, but daily life usually starts with two names: income tax and resident tax.

Income Tax: National, Current-Year Income

Income tax is handled by the National Tax Agency. It is based on income earned from January 1 to December 31.

For many employees, income tax is taken from salary every month. At the end of the year, the employer calculates the annual amount through year-end adjustment. If your case is simple, this may finish your income tax for the year.

A simple case usually means:

you work for one employer,
your salary is subject to withholding,
your annual salary is not more than 20 million yen,
your income outside salary is 200,000 yen or less.

The National Tax Agency explains that most wage earners do not need to file a final return when their income tax is completed through year-end adjustment. But this changes if you have side income, multiple employers, high income, certain deductions, overseas salary arrangements, or freelance income.

Resident Tax: Local, Previous-Year Income

Resident tax is paid to a local government. In Tokyo’s 23 wards, for example, this includes special ward resident tax and metropolitan resident tax. In other cities, it is usually municipal and prefectural resident tax.

The key date is January 1. If you had an address in a municipality on January 1 and earned enough income in the previous year, that municipality can assess resident tax.

So if you lived in Japan on January 1, 2026, your 2026 resident tax is generally based on income earned from January to December 2025.

Here is the point: income tax follows the income year closely, while resident tax often feels delayed because the bill comes after the year is over.

Deadlines You Should Actually Put on a Calendar

Tax deadlines matter because late filing or late payment can lead to extra tax and delinquent tax. For foreign residents, the bigger risk is often practical: leaving Japan, changing jobs, or moving cities before the bill arrives.

Income Tax Filing Deadline

The standard final tax return period is from February 16 to March 15 of the following year. If the deadline falls on a weekend or national holiday, the date can move to the next business day.

For income earned in 2025, the National Tax Agency’s English guide states that the filing and payment period is:

February 16, 2026 to March 16, 2026

March 15, 2026 was a Sunday, so the 2025 income tax deadline moved to Monday, March 16, 2026.

Refund returns are different. If you are filing only to receive an income tax refund, the National Tax Agency says you can generally submit a refund claim for up to five years from January 1 of the year after the income year.

Resident Tax Reporting and Payment Timing

Resident tax is local, so details can vary by municipality. The basic pattern is still similar across Japan.

In Shinjuku City’s English guidance, resident tax is levied each year on registered residents in the municipality as of January 1, regardless of nationality. Shinjuku also states that residents should file a resident tax report by March 15 each year for the previous year’s income, unless they already filed an income tax return with the tax office or their employer submitted the required salary report to the city.

Payment usually happens in one of two ways:

Special collection: your employer deducts resident tax from salary, usually from June to May of the following year.
Ordinary collection: the city sends payment slips, often around June, and you pay the city yourself in installments.

Tokyo’s Bureau of Taxation calendar lists special ward inhabitant tax ordinary collection months as June, August, October, and January. Some cities publish exact due dates each fiscal year, so always check the notice from your own municipality.

A Practical Timeline for One Tax Year

Here is a simple timeline for someone who worked in Japan during 2025.

Timing	What happens	What to check
January to December 2025	You earn salary, freelance income, or other income.	Keep payslips, withholding slips, invoices, expense records, and deduction documents.
Late 2025	Employees may complete year-end adjustment through their employer.	Check dependents, insurance deductions, and whether side income changes your filing duty.
February 16 to March 16, 2026	Final income tax return period for 2025 income.	File if required, or if filing helps you claim a refund.
January 1, 2026	Your resident tax municipality is generally fixed by where you are registered on this date.	If you moved, the old city may still be the one billing you.
Around June 2026	Resident tax for 2025 income begins to be collected.	Check whether it is deducted from salary or paid by slips yourself.

This timeline explains a common surprise: you can finish your income tax in March, then still receive a resident tax notice in June.

Who Usually Needs to File an Income Tax Return?

Many full-time employees do not file because the employer handles withholding and year-end adjustment. But you should not assume that payroll solved everything.

The National Tax Agency lists several cases where wage earners must file. Common situations include:

salary over 20 million yen,
income outside employment income and retirement income over 200,000 yen,
two or more salary sources where the extra salary and other income exceed the threshold,
certain deductions or tax credits that require filing,
freelance or business income,
leaving Japan with unfinished tax procedures.

A student with one small part-time job may have a simple case. A student with two jobs, freelance translation income, or treaty-related questions may not.

A company employee with one salary may be finished after year-end adjustment. A company employee who also teaches online, sells services, receives overseas salary, or invests through taxable accounts may need to check more carefully.

What Changes for Non-Residents and New Arrivals?

Tax residence is not the same as immigration status. Your visa category does not automatically decide how income tax works.

The National Tax Agency says a person is generally treated as a non-resident for Japanese income tax purposes unless they have a domicile in Japan or have had a residence continuously for one year or more in Japan.

For non-residents, Japan generally taxes Japan-source income. Some payments to non-residents are taxed by withholding at source. The NTA gives a practical example for working-holiday visitors from Australia who stayed less than one year: salary in Japan is generally subject to withholding at 20.42%, and the taxation is completed by that withholding, so there is no refund through a final return in that example.

This matters for:

working holiday makers,
short-term assignees,
students with treaty questions,
people paid partly from outside Japan,
people leaving before one full year.

Tax treaties can change the result in some cases, but they do not apply automatically just because your country has a treaty with Japan. The NTA explains that treaty benefits usually require submitting the correct “Application Form for Income Tax Convention” through the payer before payment, and late cases may require a refund application through the payer.

Resident Tax Is Where Many People Get Caught

Resident tax often causes more confusion than income tax because it is local, delayed, and tied to your January 1 address.

If You Move Within Japan

If you moved after January 1, the city where you lived on January 1 may still bill you for that fiscal year’s resident tax.

For example, if you lived in Shinjuku on January 1 and moved to Osaka in April, the resident tax notice for that year may still come from Shinjuku. This is normal. You do not pay the same resident tax to both cities for the same year just because you moved after January 1.

If You Leave Japan

Leaving Japan does not erase resident tax.

Shinjuku City’s English guidance says that if you plan to leave Japan before receiving the resident tax notification in early June, you must either designate someone to pay on your behalf or pay the tax in advance. If you leave after receiving the notice, you must either designate someone to pay or pay the rest before leaving.

The National Tax Agency has a similar rule for income tax procedures before departure. If you leave Japan and still have tax filing or payment obligations, you may need to appoint a tax agent in Japan. If you do not appoint one and you must file for that year, you may need to file and pay before departure.

If Your Employer Changes

Resident tax deducted from salary can be interrupted when you leave a job. Depending on timing, your remaining resident tax may be:

deducted in a lump sum from your final salary,
transferred to the new employer for salary deduction,
changed to ordinary collection, where the city sends payment slips to you.

Do not ignore payment slips just because tax was previously deducted from salary. The collection method may have changed.

Common Mistakes and How to Avoid Them

Taxes in Japan become much easier when you separate the bill, the year, and the office responsible.

Mistake 1: Thinking Resident Tax Is a Second Income Tax Error

A resident tax bill in June does not usually mean your employer made an income tax mistake. It is a separate local tax based on the previous year.

Check the notice. It should say which municipality issued it, which year it covers, and how to pay.

Mistake 2: Forgetting Side Income

The 200,000 yen rule for wage earners is often misunderstood. It is not a general “tax-free side income” rule for every situation. It relates to whether certain wage earners must file an income tax return.

Resident tax reporting may still be needed, and the rule can differ if you are not a standard employee with year-end adjustment.

Mistake 3: Leaving Japan Before the June Bill

A person who worked in Japan last year and leaves in spring may still be billed for resident tax in June. Before departure, ask your city office and employer how the remaining tax will be paid.

This is especially important for students finishing school, workers ending an assignment, and working holiday residents returning home.

Mistake 4: Losing Tax Documents

Keep these documents at least until your tax position is clear:

withholding tax slip from employer,
resident tax notice,
payslips,
My Number-related filing information,
social insurance premium documents,
life insurance deduction certificates if relevant,
medical expense records if claiming deductions,
invoices and expense records for freelance work.

The NTA’s 2025 guide also notes a practical change: from January 2025, tax offices no longer affix receipt date stamps to copies of paper returns. If you file on paper, keep your own copy and manage proof of submission carefully.

Regional Differences to Expect

National income tax rules are handled by the National Tax Agency, so the core filing period and national return rules are national.

Resident tax is different. Municipalities handle assessment and collection, and local notices may use slightly different names.

You may see terms such as:

resident tax,
inhabitant tax,
municipal tax,
prefectural tax,
special ward resident tax in Tokyo’s 23 wards,
metropolitan resident tax in Tokyo.

Some local governments also include the forest environmental tax on the resident tax notice. Nagoya City’s 2025 English guide explains that residents tax is divided into municipal and prefectural residents tax, and that the forest environmental tax is imposed separately as a national tax. Nagoya’s guide lists the forest environmental tax as 1,000 yen per year for fiscal 2025.

Payment options also differ. Some cities allow convenience store payment, bank transfer, smartphone payment apps, or online payment. The amount limit and whether you receive a paper receipt can vary, so check the instructions printed on your own bill.

Latest Points to Know in 2026

As of April 20, 2026, these are the current practical points to keep in mind:

The NTA’s English guide for 2025 income set the filing and payment deadline as March 16, 2026.
The usual final return window remains February 16 to March 15 of the following year, adjusted when the deadline falls on a weekend or holiday.
Paper return copies no longer receive a tax office receipt date stamp from January 2025, so filers should keep their own copy and submission record.
Resident tax for 2025 income is expected to be collected from around June 2026 by the municipality where you were registered on January 1, 2026.
Exact resident tax due dates and payment methods depend on the municipality.

Practical Checklist Before Tax Season

Use this checklist before February and again before June.

For income tax:

Confirm whether your employer completed year-end adjustment.
Check whether you had side income, two employers, freelance income, overseas-paid salary, or deductions to claim.
Prepare your withholding tax slip and deduction documents.
If filing, check the NTA’s current-year guide and e-Tax options.

For resident tax:

Confirm where you were registered on January 1.
Watch for a notice from that municipality around June if tax is not deducted from salary.
If changing jobs, ask how the remaining resident tax will be collected.
If leaving Japan, speak with your city office before departure and arrange payment or a tax representative if needed.

The most practical habit is simple: treat income tax and resident tax as two separate calendars. March is usually about national income tax. June is when local resident tax becomes visible. Missing that second calendar is what creates the expensive surprise.

References

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