Tax Treaties: How to Avoid Double Taxation in Japan

What are tax treaties? 租税条約とは

A tax treaty (租税条約 / sozei jōyaku) is a bilateral agreement between two countries that determines how cross-border income is taxed. The primary goal is to prevent double taxation -- the situation where the same income gets taxed in both your home country and Japan. Without a treaty, a US citizen working in Japan could theoretically owe income tax to both the IRS and the NTA (国税庁) on the same paycheck.

As of 2026, Japan has tax treaties (租税条約) with over 80 countries and regions. These treaties follow the general framework of the OECD Model Tax Convention and the UN Model, but each treaty has unique provisions negotiated between the two countries. This means the specific rates, exemptions, and rules vary depending on your nationality and tax residency.

Tax treaties do not create new taxes -- they limit or reduce the taxes that would otherwise apply under each country's domestic law. They accomplish this through several mechanisms: allocating taxing rights between the two countries, reducing withholding tax rates, and providing procedures for resolving disputes when both countries claim the right to tax the same income.

How tax treaties help you 租税条約のメリット

Tax treaties benefit foreigners in Japan in several concrete ways. Understanding these benefits can save you significant money -- in some cases, hundreds of thousands of yen per year.

Key benefits of tax treaties:

• Reduced withholding tax on dividends -- Japan's domestic rate is 20.315% on dividends. Treaties can reduce this to 10%, 15%, or even 0% depending on the country and your ownership stake.
• Reduced withholding tax on interest -- Interest income from Japanese sources normally has 15.315% withheld. Treaties can reduce this to 10% or 0%.
• Reduced withholding tax on royalties -- Royalty payments (software licenses, intellectual property, etc.) can have their withholding rate reduced or eliminated entirely.
• Elimination of double taxation on employment income -- Treaties determine which country taxes your salary, preventing you from paying income tax in both countries.
• Pension provisions -- Some treaties specify that pension income is only taxed in one country, which is critical if you receive pension payments from your home country while living in Japan.
• Student and trainee exemptions -- Many treaties exempt students and trainees from tax on certain types of income for a limited period.
• Foreign tax credits -- Even without a treaty, Japan allows a foreign tax credit (外国税額控除) to offset taxes paid abroad, but treaties often provide clearer rules and better terms.

Common treaty provisions 租税条約の主な規定

While every treaty is different, most follow a similar structure based on the OECD Model. Here are the key provisions you will encounter as a foreigner living in Japan:

Permanent establishment (恒久的施設 / PE)

A permanent establishment (PE) is a fixed place of business through which a company conducts its activities. This concept is crucial because a country generally cannot tax a foreign company's business profits unless that company has a PE in the country. If you work remotely for a foreign company from Japan, the question of whether your home office constitutes a PE for your employer can have significant tax implications. (Most treaties follow OECD Model Article 5)

Employment income (給与所得)

Most treaties follow the "183-day rule" for employment income: if you are present in the other country for fewer than 183 days during the tax year (or any 12-month period), your salary is taxed only in your country of residence -- provided your employer does not have a PE in the other country and the salary is not borne by a PE. This provision is particularly relevant for short-term assignments and business travelers.

Dividends (配当)

Treaties typically allow both countries to tax dividends, but limit the withholding tax rate in the source country (the country where the company paying dividends is located). The rate usually depends on the percentage of ownership -- a direct investor owning 10-25%+ of the company often gets a lower rate (e.g., 5%) compared to a portfolio investor (e.g., 10-15%).

Interest (利子)

Interest income paid from one country to a resident of the other is typically subject to reduced withholding. Some of Japan's newer treaties (e.g., with the US and UK) reduce the interest withholding rate to 0% under certain conditions, meaning interest from Japanese bank accounts or bonds may not be subject to Japanese withholding tax for qualifying residents of those countries.

Royalties (使用料)

Royalties cover payments for the use of intellectual property -- patents, trademarks, copyrights, software licenses, and technical know-how. Many of Japan's treaties reduce the withholding rate on royalties to 0-10%. This is highly relevant for freelancers and consultants who license intellectual property across borders.

Capital gains (譲渡所得)

Capital gains from the sale of shares are generally taxed only in the country of residence of the seller. However, gains from the sale of real estate (不動産) are typically taxed in the country where the property is located. If you sell your apartment in Japan, Japan retains the right to tax the capital gain regardless of your nationality or the treaty.

Pensions (年金)

Treaty provisions on pensions vary significantly. Some treaties say pensions are taxed only in the country that pays them; others say only in the country of residence. This matters if you receive a pension from your home country while living in Japan, or if you leave Japan and later receive Japanese pension payments. Check your specific treaty carefully.

Key countries with Japan tax treaties 主な租税条約締結国

Japan has tax treaties with most major economies. Here are the treaties most relevant to the English-speaking foreigner community in Japan, along with notable provisions:

• United States -- One of Japan's most comprehensive treaties. Reduced dividend rates (10% portfolio, 0-5% direct investment). Interest withholding often 0%. Unique provisions for US citizens (who must file US taxes regardless of where they live). Includes a "saving clause" preserving the US right to tax its own citizens.
• United Kingdom -- Modernized treaty in effect. Dividend rates: 10% (portfolio), 0% (direct investment with 10%+ ownership). Interest: 0% in many cases. Royalties: 0%. Very favorable for UK nationals working in Japan.
• Australia -- Dividend rates: 10-15%. Interest: 10%. Royalties: 5%. Includes a pension provision that can benefit Australians receiving superannuation payments.
• Canada -- Dividend rates: 15% (portfolio), 5% (direct investment with 25%+ ownership). Interest: 10%. Royalties: 10%. Includes student exemptions.
• Germany -- Dividend rates: 15% (portfolio), 5% (direct investment with 25%+ ownership). Interest: 0% in many cases. Royalties: 0%. EU-Japan Economic Partnership Agreement also affects trade.
• France -- Dividend rates: 10%. Interest: 0% in many cases. Royalties: 0%. Comprehensive provisions for professors and researchers.
• China -- Dividend rates: 10%. Interest: 10%. Royalties: 10%. Includes provisions for students and trainees that can provide temporary tax exemptions.
• South Korea -- Dividend rates: 15% (portfolio), 5% (direct investment with 25%+ ownership). Interest: 10%. Royalties: 10%.
• India -- Dividend rates: 10%. Interest: 10%. Royalties: 10%. Includes a most-favored-nation clause in a protocol that can further reduce rates.
• Singapore -- Dividend rates: 15% (portfolio), 5% (direct investment with 25%+ ownership). Interest: 10%. Royalties: 10%.

How to claim treaty benefits 租税条約の届出手続き

Treaty benefits are not automatic. You must actively claim them by filing the appropriate notification forms with the Japanese tax office. If you do not file, the full domestic withholding rate applies -- and getting a refund after the fact is more complicated than claiming the reduced rate upfront.

The notification form: 租税条約に関する届出書

The primary form is the 租税条約に関する届出書 (sozei jōyaku ni kansuru todokesho / "Notification Form for Treaty Benefits"). There are different versions depending on the type of income:

• 様式1 -- For dividends (配当に対する所得税及び復興特別所得税の軽減・免除)
• 様式2 -- For interest (利子に対する所得税及び復興特別所得税の軽減・免除)
• 様式3 -- For royalties (使用料に対する所得税及び復興特別所得税の軽減・免除)
• 様式7 -- For employment income and other personal services
• 様式8, 9, 10 -- For pensions, students/trainees, and other specific categories

Required documents typically include:

1. The notification form itself -- Completed in Japanese (your payer or tax advisor can help with this).
2. Certificate of tax residency -- A document from your home country's tax authority proving you are a tax resident there. For the US, this is IRS Form 6166. For the UK, you request it from HMRC. This certificate must generally be from the current or most recent tax year.
3. Identification -- Your passport, residence card (在留カード), or マイナンバー card.
4. Other supporting documents -- Depending on the income type, you may need proof of share ownership, employment contracts, or other evidence.

When to file

The notification form must be filed before the payment date of the income. For dividends, this means before the dividend record date or payment date. For employment income, it should be filed before your employer starts withholding tax. The payer (employer, brokerage, bank) submits the form to their local tax office on your behalf. You fill it out and give it to them.

Practical process for common situations

For dividends from a Japanese brokerage (証券会社):

1. Obtain a certificate of tax residency from your home country's tax authority.
2. Contact your brokerage and request the 租税条約に関する届出書 (様式1 for dividends).
3. Complete the form and return it to the brokerage with your residency certificate.
4. The brokerage submits it to the tax office and applies the treaty rate going forward.

For employment income:

1. Discuss with your employer's HR or accounting department (経理部).
2. Complete the notification form (様式7) and provide your residency certificate.
3. Your employer submits the form to the tax office and adjusts withholding accordingly.

For interest from a Japanese bank:

1. Contact your bank and ask about treaty application procedures.
2. Complete the notification form (様式2) and provide your residency certificate.
3. The bank applies the reduced rate to future interest payments.

In all cases, the payer (not you) submits the form to the tax office. Your role is to complete the form, attach the supporting documents, and deliver them to the payer before the income payment date. (国税庁タックスアンサー No.2899)

Withholding rate comparison table 主要国の源泉徴収税率

The table below shows the maximum withholding tax rates under Japan's treaties with the 10 countries most represented in the foreigner community. These are the rates that apply when income is paid from Japan to a resident of the treaty country. Without a treaty, Japan's domestic withholding rates apply (generally 20.315% for dividends, 15.315% for interest, and 20.42% for royalties).

Reading the table: "Portfolio" dividends are from holding less than 10% of a company's shares -- this is the rate that applies to most individual investors. "Direct investment" dividends are from holding 10%+ (or 25%+ for some treaties). The lower direct investment rate is designed for parent-subsidiary relationships between companies, but individual majority shareholders can also qualify.

Practical examples

Example 1: British freelancer receiving dividends from Japanese stocks

Sarah is a UK tax resident living in Japan who owns shares in several Japanese companies through her SBI Securities account. She receives ¥200,000 in dividends per year. Without the treaty, Japan would withhold 20.315% (¥40,630). Under the UK-Japan treaty, the portfolio dividend rate is 10%, so only ¥20,000 is withheld -- a saving of ¥20,630. She filed 様式1 with her brokerage at the start of the year, attaching her HMRC residency certificate.

Example 2: Indian IT engineer on a short-term assignment

Raj is sent by his Indian employer to work at a client's office in Tokyo for 5 months. His salary continues to be paid by the Indian company. Under the India-Japan treaty's employment income article (183-day rule), Raj's salary is taxable only in India because: (a) he is present in Japan for fewer than 183 days in the fiscal year, (b) his salary is paid by an Indian employer, and (c) the salary is not borne by a PE of the Indian company in Japan. His employer files 様式7 with the Japanese tax office, and no Japanese income tax is withheld.

Example 3: Canadian receiving pension from Canada while living in Japan

Mike retired and now lives in Japan. He receives Canadian Pension Plan (CPP) payments. Under the Canada-Japan treaty, pensions are generally taxable only in the country of residence of the recipient -- Japan. Mike reports his CPP income on his Japanese 確定申告, pays Japanese income tax on it, and Canada does not withhold tax on the pension payments. He needs to file a treaty-based exemption form with the Canadian tax authorities (CRA) to stop Canadian withholding.

Frequently asked questions よくある質問

Does my country have a tax treaty with Japan?

Japan has tax treaties with over 80 countries, covering the vast majority of nations. Major countries without a treaty with Japan include Brazil and some African and Middle Eastern nations. The NTA maintains a complete list on their website. If your country does not have a treaty with Japan, you rely on Japan's domestic foreign tax credit (外国税額控除) system to mitigate double taxation.

I forgot to file the notification form. Can I get a refund?

Yes, you can file a 還付請求書 (Application for Refund of Withholding Tax under Tax Treaty) to recover the difference between the domestic rate and the treaty rate. The statute of limitations for refund claims is generally 5 years from the day following the statutory due date. However, the refund process takes several months, so it is always better to file the notification form proactively. (国税庁タックスアンサー No.2895)

Do I need a new residency certificate every year?

Generally, yes. Most payers (brokerages, banks, employers) require a certificate of tax residency that is valid for the current or most recent tax year. Check with your payer about their specific requirements, as some may accept certificates that are up to one year old.

I am a tax resident of Japan and my home country. Which treaty applies?

If you are considered a tax resident of both countries (dual residence), the treaty's "tie-breaker" rules determine which country is your treaty residence. The tie-breaker considers, in order: (1) where you have a permanent home, (2) your center of vital interests (family, economic ties), (3) your habitual abode, and (4) your nationality. If none of these resolve the issue, the tax authorities of both countries negotiate (mutual agreement procedure).

Do treaty benefits apply to my NISA account?

NISA already provides tax-free treatment on dividends and capital gains within the account for Japanese tax purposes. Treaty benefits primarily matter for income from sources outside Japan or for situations where you are receiving Japanese-source income as a non-resident. If you invest in Japanese stocks through NISA, dividends are already tax-free in Japan. However, your home country may still tax the dividends -- and the treaty provisions with your home country determine whether and how that works.

Can I claim treaty benefits through e-Tax?

The notification forms (届出書) are typically submitted through the payer (your employer, brokerage, or bank), not through your personal e-Tax filing. The payer submits the form to their local tax office. For your personal 確定申告 (annual tax return), you can claim a foreign tax credit (外国税額控除) through e-Tax if you have already paid tax on the same income in another country.

I am leaving Japan. How do treaties affect my departure?

When you leave Japan and become a non-resident, the treaty between Japan and your new country of residence determines how Japanese-source income (dividends from Japanese stocks, rental income from Japanese property, pension payments from 厚生年金, etc.) is taxed. You may need to appoint a 納税管理人 (tax agent) in Japan to handle ongoing tax matters. See our Leaving Japan tax guide for more details.