The Japanese Tax System: An Overview
As an Indonesian citizen (WNI) working in Japan, you are required to pay taxes. The Japanese tax system may seem complex, but understanding the basics will help you avoid problems and even save money legally. A clean tax record is also very important for visa extensions and permanent residence applications.
Types of Taxes
| Type of Tax | Rate | Who Pays | How to Pay |
|---|---|---|---|
| Shotokuzei (所得税) - Income Tax | 5-45% (progressive) | Everyone with an income | Deducted from salary or self-payment |
| Juminzei (住民税) - Resident Tax | Around 10% | Residents as of January 1st | Deducted from salary or separate bill |
| Shouhizei (消費税) - Consumption Tax | 10% (8% for food) | All consumers | Included in the price |
Income Tax (Details)
| Taxable Income | Tax Rate | Deduction |
|---|---|---|
| 0 - 1,950,000 yen | 5% | 0 yen |
| 1,950,001 - 3,300,000 yen | 10% | 97,500 yen |
| 3,300,001 - 6,950,000 yen | 20% | 427,500 yen |
| 6,950,001 - 9,000,000 yen | 23% | 636,000 yen |
| 9,000,001 - 18,000,000 yen | 33% | 1,536,000 yen |
| 18,000,001 - 40,000,000 yen | 40% | 2,796,000 yen |
| More than 40,000,000 yen | 45% | 4,796,000 yen |
Resident Tax (Juminzei) - Be Careful!
Juminzei often surprises Indonesian citizens in their second year:
- Calculated based on the PREVIOUS YEAR's income
- Billed starting from June of the following year
- The rate is about 10% of taxable income
- The Trap: If you work in 2025 and return home in early 2026, you will still be billed for the 2025 juminzei. You must appoint a tax representative (納税管理人) or pay it off before you leave.
Deductible Tax Allowances
| Type of Deduction | Amount | Conditions |
|---|---|---|
| Basic Deduction (基礎控除) | 480,000 yen | Automatic for everyone |
| Salary Deduction (給与所得控除) | 550,000 - 1,950,000 yen | Automatic for employees |
| Social Insurance Premium Deduction (社会保険料控除) | The full amount paid | NHI, Nenkin - automatic |
| Spouse Deduction (配偶者控除) | Max 380,000 yen | Spouse's income is below 480,000/year |
| Dependent Deduction (扶養控除) | 380,000-630,000 yen/person | Includes family in Indonesia! |
| Medical Expense Deduction (医療費控除) | Max 2,000,000 yen | Total medical expenses exceed 100,000/year |
| Life Insurance Premium Deduction (生命保険料控除) | Max 120,000 yen | If you have life insurance |
Claiming Dependents in Indonesia - VERY IMPORTANT
Many Indonesian citizens do not know that family in Indonesia can be claimed as tax dependents!
Requirements:
- Family relationship: parents, siblings, children
- Their income is below 480,000 yen/year (around 50 million IDR)
- You send money to support them
Documents required:
- Proof of family relationship (Family Card/KK or birth certificate, translated into Japanese by a sworn translator)
- Proof of remittance of at least 380,000 yen/year per dependent (transfer slips from Wise, Western Union, bank)
Potential savings: 3 dependents x 380,000 yen deduction = 1,140,000 yen reduction in taxable income. At a 20% rate: a saving of 228,000 yen in taxes per year!
Kakutei Shinkoku (確定申告) - Tax Return
You need to file a tax return if:
- You have income from 2+ companies
- Side income exceeds 200,000 yen/year
- You want to claim the medical expense deduction
- You want to claim overseas dependents
- You quit your job mid-year
Period: February 16 - March 15. Website: keisan.nta.go.jp. You can also go directly to the tax office (税務署/zeimusho) for a free consultation.
Furusato Nozei - A Favorite Tax-Saving Tip
Furusato Nozei (ふるさと納税) is a donation system to local governments that provides gifts and tax deductions:
- Donate to a municipality of your choice through furusato-tax.jp or satofull.jp
- Receive a gift in the form of local products (wagyu beef, fruits, rice, seafood)
- Almost the entire donation amount is deducted from next year's juminzei
- The donation limit depends on your income (use an online calculator)
Example: An income of 4 million yen = donation limit of about 42,000 yen. You pay 2,000 yen yourself, and the rest becomes a tax deduction. You get products worth 30% of the donation (about 12,000 yen) for just a 2,000 yen out-of-pocket cost.
Indonesia-Japan Tax Treaty
Indonesia and Japan have a tax treaty (double taxation avoidance agreement). This means you will not be taxed twice on the same income. However, if you still have an active Indonesian tax ID (NPWP), it is advisable to consult with a tax expert about your reporting obligations.
Tax Tips for Indonesian Citizens
- Keep all proof of remittances to Indonesia - This is the key to claiming dependents.
- Do not ignore juminzei bills - Tax arrears affect visa extensions.
- Use the free consultations - The tax office provides free consultations, sometimes with interpreters available.
- Use furusato nozei - Get quality products for free with minimal out-of-pocket cost.
- Keep all medical receipts - Claim them if the total exceeds 100,000 yen/year.
Understanding and complying with your tax obligations is crucial, not only to avoid legal issues but also to maximize your finances in Japan. Take advantage of all legitimate deductions, especially the highly beneficial claim for dependents in Indonesia.