When a Japanese company enters the U.S. market, the first decision it faces is often whether to operate as a branch or set up a local subsidiary. Both allow you to do business in the U.S., but they differ completely in tax treatment and the scope of legal liability. This article lays out the branch-vs-subsidiary tradeoffs from the perspective of a Japanese parent company.
Legal Liability: Does the Parent Company Stand on the Front Line?
A branch means the Japanese entity itself is directly doing business in the U.S. — no new legal entity is created, so in theory the Japanese parent company itself bears responsibility for U.S. lawsuits and liabilities. A subsidiary, by contrast, is a newly formed, independent U.S. legal entity, so its debts and litigation risk generally stay contained within the subsidiary, shielding the parent (the principle of limited liability). Given the litigious nature of the U.S. business environment, this liability shield is the primary reason most Japanese companies choose the subsidiary structure.
Tax Differences: Branch Profits Tax vs. Dividend Withholding
To keep the tax burden roughly equivalent between branches and subsidiaries, Congress created a mechanism for branches called the “Branch Profits Tax.”
Subsidiary: 21% Corporate Tax Plus Dividend Withholding
A U.S. subsidiary first pays the 21% federal corporate tax on its own income. When after-tax profits are then remitted to the Japanese parent as a dividend, a 30% withholding tax generally applies, though the US-Japan tax treaty reduces this to 0% if certain requirements (ownership percentage, satisfying the Limitation on Benefits clause) are met, and to a reduced rate even in more general cases. Because the parent controls whether or not to actually remit the dividend, retaining profits in the U.S. lets you defer this layer of tax.
Branch: 21% Corporate Tax Plus Branch Profits Tax
A branch is first taxed at the 21% corporate rate on its effectively connected income earned in the U.S., and then a “dividend equivalent amount” is calculated at year end and taxed under the Branch Profits Tax. The standard rate is 30%, but under the US-Japan tax treaty, this can be reduced to 0% if the requirements of Articles 10 and 22 are met, or to as low as 5% otherwise. Unlike dividend withholding on a subsidiary, this tax is triggered automatically by the year-end calculation regardless of whether any funds were actually remitted to Japan.
Differences in Setup and Operating Cost
A branch doesn’t require forming a new entity — you only need to obtain a Certificate of Authority (foreign qualification) to do business in the target state, which keeps initial costs relatively low. A subsidiary, on the other hand, involves the costs of forming a new entity (incorporation fees, obtaining an EIN, setting up a board of directors) plus ongoing administrative burdens such as transfer pricing documentation requirements for transactions with the parent. That said, many U.S. counterparties and financial institutions expect to contract with, and open accounts for, an “independent U.S. entity,” so a subsidiary is often the more practical choice for building U.S. business relationships.
Ease of Future Sale or Exit
If you might sell the U.S. business to a third party in the future, a subsidiary can be sold cleanly as a stock sale. A branch, having no separate legal identity, generally has to be sold through an asset sale, which tends to involve messier contract reassignments and asset valuation work.
A Quick Reference
| Consideration | Branch | Subsidiary |
|---|---|---|
| Legal liability | Can extend back to the parent | Contained within the subsidiary |
| Initial cost | Relatively low | Requires formation costs and operational setup |
| U.S. tax rate (after treaty relief) | Branch Profits Tax 0-5% | Dividend withholding 0% to reduced rate |
| Future sale | Asset sale (more complex) | Stock sale (simpler) |
| Best suited for | Market research, small-scale test entry | Full-scale, long-term local operations |
Frequently Asked Questions
Q: Can I start as a branch and convert to a subsidiary later?
A: Yes. In practice, it’s common to run market research or a small-scale test as a branch (or representative office) and incorporate a subsidiary once the business gains traction. However, converting requires handling existing contracts, transferring assets, and settling the Branch Profits Tax calculation, so it’s best to plan the timeline with a professional in advance.
Q: What is the Limitation on Benefits (LOB) clause?
A: It’s a treaty provision limiting treaty benefits to genuine residents and businesses of the treaty countries. For a Japanese company to claim reduced rates under the US-Japan treaty (such as 0% Branch Profits Tax or reduced dividend withholding), it must satisfy one of the LOB clause’s qualifying tests (such as the publicly-traded test, ownership test, or active trade or business test).
This article is provided for general informational purposes only and is not a substitute for individualized tax or legal advice. Eligibility for treaty benefits, including the LOB clause, depends on individual facts, so please consult a professional before deciding on your entry structure.
Summary
Choosing between a branch and a subsidiary requires weighing more than just a simple tax-rate comparison — liability protection, operating costs, and future exit strategy all matter. A branch tends to fit small-scale test entries, while a subsidiary fits full-scale, long-term operations, but your actual tax burden can shift significantly depending on whether you satisfy the US-Japan treaty’s LOB requirements. We recommend having a professional run the numbers before settling on your entry structure.
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