US-Japan Tax Treaty 2026 Essential Guide For US Owners

The US-Japan tax treaty can reduce Japanese withholding tax on dividends paid to an eligible US resident. The rate depends on the recipient’s treaty residency, whether they own the company personally or through a corporation, and the conditions they meet.

This guide explains the main eligibility tests, the treatment of dividends, interest and royalties, and the paperwork needed to claim relief. It also covers when a US business’s activities may create a taxable presence in Japan.

The current treaty was signed on 6 November 2003 and entered into force on 30 March 2004. A protocol signed on 24 January 2013 entered into force on 30 August 2019. Its withholding changes apply to amounts paid or credited from 1 November 2019, and its other income tax changes to taxable years beginning on or after 1 January 2020.

Last updated: 20 October 2026. This article provides general information, not legal, accounting or tax advice. SmartStart Japan does not provide US tax advice. For your situation, consult a Japanese licensed tax accountant (税理士, zeirishi) and a US cross-border CPA.

Does the treaty apply to you?

Start with residence. Most treaty benefits are available only to a resident of the United States or Japan as defined in Article 4 of the treaty, and a company must also pass the limitation-on-benefits (LOB) test in Article 22. Only then do the income type and ownership tests matter. US citizenship or US incorporation alone does not establish eligibility for every benefit.

US companies and US-incorporated startups

If your US company owns a Japanese subsidiary, the treaty may reduce Japanese withholding on dividends the subsidiary pays to it. It also sets the rules for when the US company itself has a permanent establishment (PE) in Japan.

The US company must be a US resident under Article 4 and satisfy Article 22. The LOB article stops a company from routing income through the United States only to obtain treaty rates. A publicly traded company, or one at least 50% owned by individuals and other qualifying US or Japanese residents that also passes a base-erosion test, can qualify. A company that meets neither test may still qualify for income connected with an active trade or business in the United States, or by a competent-authority determination.

US citizens living and working in Japan

Under Article 4(2), a US citizen or green card holder counts as a US resident for treaty purposes only if they are not a resident of Japan under the treaty, have a substantial presence, permanent home or habitual abode in the United States, and are not resident in a third country under Japan’s treaty with it. A US citizen who lives in Japan and is a Japanese tax resident is therefore not a US resident for the treaty’s reduced Japanese withholding rates.

Separately, the saving clause in Article 1(4) preserves the United States’ right to tax its citizens as if the treaty did not exist, subject to the exceptions in Article 1(5), which include the relief-from-double-taxation article. A US citizen in Japan may therefore owe Japanese tax and still have US filing obligations. Both systems need to be reviewed together.

Non-US founders with a US holding company

A non-US founder who sets up a US holding company to own a Japanese subsidiary should not assume the structure qualifies. A US company owned mainly by people who are not US or Japanese residents may fail the ownership tests in Article 22. If you have no connection to the United States beyond the holding company, ask a cross-border adviser whether your home country’s treaty with Japan offers a better route.

What the treaty covers and excludes

Under Article 2, the treaty covers Japanese income tax and corporation tax, and US federal income taxes excluding social security taxes. It is not an exemption from every tax charged in either country. To get withholding relief, the recipient generally submits the treaty application through the Japanese payer before the payment date, covered below.

Four categories sit outside the treaty’s tax list and need separate review:

• Japanese consumption tax (消費税, shōhizei). The standard rate is 10%, with an 8% reduced rate for eligible supplies, and the qualified invoice system has applied since October 2023.
• US state taxes. States treat treaty provisions differently, so state obligations need their own analysis.
• Social security contributions. These fall under the separate US-Japan Social Security Agreement, covered later.
• Japanese local taxes. Inhabitant tax and enterprise tax are not listed in Article 2 and follow domestic law.

A reduced income tax withholding rate does not reduce consumption tax. For an overview of what a Japanese company pays, see our summary of national and local business taxes.

When does a US company owe tax in Japan?

A US company that sells into Japan before incorporating can still owe Japanese tax if it has a permanent establishment there. Under Article 7, Japan can tax the profits attributable to that PE. The treaty’s PE rules in Article 5 and Japan’s domestic rules have to be read together.

What counts as a permanent establishment

Under Article 5, a PE is a fixed place of business through which the company’s business is wholly or partly carried on, such as a branch, office or place of management. The article adds four specific rules:

• Construction and exploration. A building site, a construction or installation project, or an installation or drilling rig or ship used to explore natural resources is a PE only if it lasts, or the activity continues, for more than 12 months (Article 5(3)). This duration rule applies to those activities only.
• Preparatory or auxiliary activities. Using facilities only to store, display or deliver goods, or keeping a fixed place only to buy goods or collect information, does not create a PE, provided the overall activity stays preparatory or auxiliary (Article 5(4)).
• Dependent agents. A person who has, and habitually exercises, authority to conclude contracts in the company’s name in Japan creates a PE, unless their activities stay within the preparatory or auxiliary list (Article 5(5)).
• Independent agents and subsidiaries. A broker or other agent of independent status acting in the ordinary course of business does not create a PE (Article 5(6)), and owning a Japanese subsidiary does not by itself make it a PE of the US parent (Article 5(7)).

A local representative’s job title, or the temporary nature of an arrangement, does not settle the question.

Early-stage scenarios to examine

Activity	What to examine
Attending trade shows	Whether the activities stay preparatory or auxiliary
Hiring a Japanese sales representative	Whether they habitually conclude contracts in the company’s name, and whether they are independent
Signing customer contracts in Japan	Who negotiates and concludes the contracts, and where
Using a coworking space	Whether the space is a fixed place of business at the company’s disposal
Incorporating a Japanese subsidiary	Whether the US parent separately carries on business in Japan through a PE

These are starting points, not classifications; the facts and the treaty text decide the outcome.

If you think your business has a PE

Speak to a Japanese tax accountant before deciding whether to register a branch, set up a subsidiary or continue as you are. Depending on the facts, you may need to register the business, notify the tax office, keep accounting records and file a Japanese corporate tax return on the profits attributable to the PE. Our walkthrough of the tax office filings that follow registration lists the forms and deadlines.

Branch or subsidiary: which structure gives a better treaty outcome?

No single structure is best for every business; the choice changes liability, accounting, tax and how profits reach the US owner. A branch (支店, shiten) is part of the foreign company. A KK (株式会社, kabushiki kaisha) or GK (合同会社, gōdo kaisha) subsidiary is a separate Japanese legal entity.

Consideration	Japanese branch	Japanese subsidiary
Legal structure	Part of the foreign company	Separate Japanese legal entity
Japanese tax exposure	Profits attributable to the Japanese PE	The subsidiary’s own taxable profits
How profits reach the US	Branch profits remain the foreign company’s profits	Dividends paid to shareholders, subject to withholding
Treaty analysis	PE profits and the foreign company’s position	Subsidiary taxation and dividend withholding
Administration	Branch registration, accounting and tax filings	Incorporation, corporate accounting, tax filings and company maintenance

A subsidiary does not automatically create a PE for its US parent, though the parent can still create one through its own activities in Japan.

For the structural choice itself, see our comparison of GK, KK and branch options for US founders, how branch registration works, and the governance basics of a KK and a GK.

Entity classification mismatches

Cross-border treatment gets complicated when the two countries classify the same entity differently. For US tax purposes, a KK is generally treated as a corporation, while a GK may have classification options depending on US rules and elections. Japan may also treat a US LLC differently from the IRS.

Under Article 4(6), treaty benefits for income earned through an entity depend on how the residence country treats that entity. A mismatch can therefore decide whether income is corporate or pass-through, whether treaty benefits are available at all, and how foreign tax credits work. A US cross-border CPA and a Japanese tax accountant should review the structure together.

How much tax is withheld on dividends, interest and royalties?

Japan’s domestic withholding rates and the treaty rates are different figures; which applies depends on the income type, the recipient and whether the treaty conditions are met. Confirm each rate and your eligibility with a Japanese tax accountant before a payment.

The recipient must also be the beneficial owner of the income and satisfy the applicable treaty conditions; residency alone does not establish entitlement to a reduced rate.

Payment from Japan	General domestic rate	Treaty treatment for a qualifying US resident
Dividends from an unlisted company	Generally 20.42%	0% or 5% for a qualifying US company; 10% for other qualifying US residents (Article 10)
Interest	Generally 15.315% or 20.42%, depending on the type	Generally 0% (Article 11(1)); up to 10% for profit-linked contingent interest; securitization interest above a comparable return taxed under domestic law
Royalties	Generally 20.42%	0% (Article 12(1))

The domestic rates include the 2.1% reconstruction surtax and vary by payment type. The 2019 protocol replaced the interest article, so guides written before then show a 10% general interest rate that no longer applies.

Why the dividend rate depends on who owns the company

First establish the recipient’s residence under Article 4, then apply the ownership and entitlement-date tests in Article 10. The treaty text sets three rates:

• 0% for a qualifying US company. It must have owned, directly or indirectly through residents of either country, at least 50% of the Japanese company’s voting stock for the six months ending on the date entitlement to the dividend is determined. It must also meet one of three further tests: its shares are listed and regularly traded on a recognised exchange, or it is at least 50% owned by five or fewer such listed companies; it meets the ownership and base-erosion test plus the active trade or business test for the dividend; or it has a competent-authority determination under Article 22(4).
• 0% for a qualifying US pension fund, on dividends not derived from carrying on a business.
• 5% for a US company that owns at least 10% of the voting stock on the entitlement date.
• 10% in all other cases, including an individual who is a US resident for treaty purposes and owns shares directly.

A privately held US parent may qualify through ownership by qualifying listed companies. Otherwise, it must meet the combined ownership, base-erosion and active-business conditions, or obtain a competent-authority determination. For a Japanese payer, the 2003 exchange of notes treats the entitlement date as the end of the accounting period for which profits are distributed, not the payment date.

Before the 2013 protocol took effect, the exemption required more than 50% ownership held for 12 months. Guides written before 2019 may state that old test. The 10% rate never applies merely because an individual is a US citizen.

How profits reach a US owner

The Japanese company’s tax and the shareholder’s tax on a distribution are separate stages:

1. Japanese company tax. The KK pays corporation tax and local taxes on its taxable profits.
2. Distribution. Only distributable after-tax profits can be paid as a dividend; Japanese withholding then applies at the domestic or treaty rate.
3. Shareholder’s tax. A qualifying US company may get 0% or 5%, and a qualifying individual US resident 10%. The US-side result depends on the shareholder’s own position and needs separate advice, including on the CFC rules described below.

The total tax burden depends on the company’s taxable income, deductions, local taxes, accounting period, and the shareholder’s US position. Because these factors vary, exact calculations require an individualized assessment. Salary paid by the company is taxed differently from dividends; our director pay benchmarks cover how owner-directors navigate setting this balance.

Intercompany service fees and royalties

Payments between related companies need a commercial reason and documentation. Under the arm’s-length principle in Article 9 and Japan’s transfer pricing rules (移転価格, iten kakaku), related-party prices should match what independent parties would agree. Where a related-party royalty or interest payment exceeds that amount, the excess can be taxed in Japan at up to 5% under the treaty. Royalties otherwise qualify for 0% once the filing requirements are met.

How do you claim treaty benefits?

Treaty rates are not applied automatically. Where a Japanese company pays dividends, interest or royalties to a US recipient, the paperwork and its timing decide whether the reduced rate applies at the moment of payment.

The paperwork and who prepares it

Document	Who prepares or obtains it	Purpose
Application form for income tax convention (租税条約に関する届出書)	US recipient	Form 1 for dividends, Form 2 for interest, Form 3 for royalties
Attachment form for limitation on benefits (特典条項に関する付表, Form 17)	US recipient	Required where the treaty article claimed is subject to the LOB article
US residency certificate	US recipient, from the IRS	Form 6166, requested on Form 8802
Evidence of share ownership	Japanese company, where relevant	Supports a claim to the 0% or 5% dividend rate, for example through the shareholder register

The US recipient gives the forms to the Japanese payer, and the payer files them with the tax office for its own location. The NTA’s procedure page for dividends and its treaty forms index carry the current forms. The tax office may ask for further documents.

Timing before the first payment

The application must reach the tax office through the payer by the day before the first payment. If it arrives late, the payer withholds at the domestic rate.

The benefit is not necessarily lost. The recipient can later file the application together with a refund claim (Form 11) through the payer to recover the difference, as the NTA’s guidance on treaty refunds explains. A refund adds work and delays the money, so arrange the forms before the first dividend, interest or royalty payment.

What to ask the payer’s accounting team

If you are the US recipient, contact the Japanese company’s accounting team well before the payment date. A short message works:

We expect to receive a payment covered by the US-Japan income tax treaty. Could you confirm which treaty application form and supporting documents your team needs, and the deadline for submitting them before payment?

The payer should confirm the current requirements with its own tax accountant.

SmartStart Japan handles Japanese company incorporation and the tax office registrations that follow it. Treaty eligibility and US tax questions belong with a Japanese tax accountant and a US cross-border CPA. See our incorporation services for what we cover.

How do you avoid being taxed twice?

The treaty allocates taxing rights, but relief still depends on correct reporting and the right mechanism in each country. Under Article 23(2), the United States allows a credit for Japanese tax paid by its citizens and residents, subject to US law and its limits.

Foreign tax credits

• Individuals generally claim the foreign tax credit on Form 1116.
• US corporations generally use Form 1118.
• Individuals with a Section 962 election must attach Form 1118 to claim a credit for their share of foreign income taxes paid by a controlled foreign corporation (CFC), according to the IRS instructions for Form 1118. These deemed-paid credits are separate from credits for Japanese tax the individual paid directly.
• Treaty-based return positions may need to be disclosed on Form 8833, subject to its exceptions.

A credit does not erase every difference between the two tax bills: limitations, income categories, timing and the type of tax all affect the result. For US citizens, the saving clause means treaty relief is never an exemption from reporting worldwide income.

US reporting for Japanese entities

US citizens and US companies with interests in Japanese entities may have information-reporting duties. Form 5471 and Form 8858 may apply depending on entity classification, ownership and activities; they are not interchangeable. An incomplete required information return, or a mismatch between the Japanese accounts and what was reported to the IRS, is a US compliance problem in its own right.

The One Big Beautiful Bill Act, signed on 4 July 2025, renamed the former GILTI regime net CFC tested income (NCTI) for tax years beginning after 31 December 2025. It cut the related section 250 deduction from 50% to 40%, raised the deemed-paid credit against that income from 80% to 90%, and removed the deemed return on tangible assets that used to reduce the inclusion. The net effect depends on the taxpayer, so do not estimate your US liability from the Japanese company’s tax bill alone.

If Japan and the United States disagree

If either country taxes you in a way that is not in line with the treaty, you can present the case under the mutual agreement procedure (相互協議, sōgo kyōgi) within three years of the first notice of that taxation (Article 25(1)).

The 2013 protocol added binding arbitration. If the two authorities have not resolved the case two years after they received the information needed to consider it, it goes to a three-member panel, provided you request this in writing and sign the confidentiality statements. You can still decline the panel’s decision, in which case the case ends there. A cross-border adviser can tell you which deadlines and documents apply.

How does treaty residence work for a US citizen living in Japan?

Moving to Japan to run your company brings Japanese tax residence into play alongside your continuing US obligations. Immigration status, residence and tax residence are related in practice but are different legal tests.

Under Japanese law, an individual is a resident if they have a domicile (住所, jūsho), meaning their centre of life, in Japan, or have had a place of residence there continuously for one year or more, as the NTA’s residence guidance explains.

For US citizens and green card holders, the treaty does not use the usual permanent-home and centre-of-interests tie-breaker. Article 4(2) treats them as US residents only if they are not Japanese residents and have a substantial presence, permanent home or habitual abode in the United States. A US citizen who lives in Japan and runs a Japanese company is therefore usually a Japanese resident for treaty purposes, while still filing in the United States under the saving clause.

The 183-day figure is not a residence test. It appears in Article 14(2) as one of three conditions for exempting employment income earned on short visits. If you live in Japan, manage a Japanese company and keep ties to the United States, take advice on residence before you file. Our overview of what the Business Manager route involves covers the immigration side.

How does the separate social security agreement apply?

The income tax treaty excludes social security taxes. A separate US-Japan Social Security Agreement, in force since 1 October 2005, decides which country’s system covers a worker so contributions are not paid to both.

A US employee sent to Japan by their employer for five years or less generally stays in the US system, provided the employer obtains a certificate of coverage. Someone hired locally in Japan is generally covered by the Japanese system. Self-employed people who move their business to the other country for five years or less stay covered in the country they came from.

The result depends on the employment arrangement and the agreement’s conditions, so confirm coverage rather than assuming the income tax treaty settles it. To budget for Japanese employer contributions where they do apply, use our employee cost calculator.

What do Japanese tax audits look at in foreign-owned companies?

Foreign ownership does not suggest wrongdoing, but cross-border structures raise extra questions about income sources, ownership and related-party payments. A Japanese tax audit (税務調査, zeimu chōsa) examines accounting records, invoices, contracts, payment records and Japanese filings. Keep supporting documents for every cross-border payment and for the relationship between the Japanese company and its US owner.

On the Japanese side, pay particular attention to:

• related-party payments made without contracts or supporting evidence;
• activities that may amount to an unreported permanent establishment;
• reduced withholding applied without the treaty application on file;
• dividend rates applied without confirming the shareholder’s eligibility.

Some of these are compliance failures in themselves: a reduced rate applied with no application filed, or a PE that was never reported. Others are warning signs that need investigation. Confirm the facts and the filing obligations before classifying an issue. Steady monthly bookkeeping is what makes these records available when an auditor asks.

Choosing advisers for Japan-US work

A cross-border business needs two advisers who coordinate: a Japanese tax accountant for Japanese compliance, and a US cross-border CPA for US returns and international rules. Look for practical experience with the treaty, Japanese withholding, foreign tax credits, PE assessments and US ownership of Japanese entities.

Bring entity registration documents from both countries, an ownership chart, intercompany agreements, details of salary and dividend payments, recent tax returns, your residence status, and any treaty applications or tax notices. Ask for a written proposal that separates recurring filings from one-off structuring advice.

Recent developments

Whether each change affects you depends on your tax year, financial year and structure.

Date	Development
1 April 2026	Japan’s defence special corporation tax applies to financial years starting on or after this date: 4% of base corporation tax after a ¥5 million annual deduction. A company whose base corporation tax stays under ¥5 million pays nothing but still generally files a return (J-Net21 summary).
4 July 2025	The One Big Beautiful Bill Act was signed, changing US international tax rules for CFC owners from 2026 tax years.
October 2023	Japan’s qualified invoice system for consumption tax began.
30 August 2019	The 2013 protocol entered into force, changing the dividend exemption test, the interest article and dispute resolution.

Next steps

Before a cross-border payment, identify the recipient’s treaty residence, confirm the payment category and the conditions for the rate you plan to use, and get the treaty application to the payer before the payment date. Keep evidence of ownership and of related-party transactions, and check whether the US business’s own activities in Japan could create a PE.

If you are setting up the Japanese company itself, SmartStart Japan can handle the incorporation and the registrations that follow. Book a free consultation to discuss your setup.