For a foreign owner setting up in the United States, the entity decision is really a tax decision wearing a legal costume. The two mainstream choices — a C-corporation or a limited liability company — lead to very different outcomes: one caps US tax at the entity level and shields you personally, at the cost of a second layer of tax when profit comes out; the other can avoid that second layer but may pull you into a personal US filing obligation and trigger withholding on your share of income before you ever see a distribution. There is no universally "best" entity — there is only the entity that fits how you'll earn, repatriate, and be taxed at home.
The stakes are concrete. A C-corp pays 21% corporate tax, then a dividend to a foreign owner faces 30% statutory withholding — a two-layer bite that a treaty can shrink toward 5% or 0%. A pass-through LLC skips the entity-level tax but, if it earns effectively connected income, must withhold on a foreign owner's share at the top rate and remit it to the IRS whether or not cash goes out the door. And a branch of a foreign parent adds the branch profits tax as a stand-in for that second layer. This article lays out the trade-offs the way a CPA weighs them: double tax versus single tax, containment versus exposure, and the withholding mechanics that decide the cash flow.
The core trade-off: one layer of tax or two
Everything else flows from a single question. Do you want US tax charged once, at the owner level as it's earned, or twice — at the entity and again on distribution — in exchange for a clean wall between the US business and you personally? A C-corp is the two-layer, high-containment choice. A pass-through is the one-layer, higher-exposure choice.
C-corporation
- Entity pays 21% corporate tax on its own income
- Second layer: 30% withholding on dividends out, reduced by treaty
- Foreign owner has no US return merely from owning shares
- Clean liability wall around the foreign owner
- Predictable, entity-contained US filing
Pass-through LLC / partnership
- No entity-level income tax — one layer only
- But withholding on a foreign partner's effectively connected income
- Foreign owner may have a direct US filing obligation
- Income taxed to the owner as earned, distributed or not
- Simpler tax result, more owner-level exposure
The C-corp path: double tax, but a clean wall
Choose a C-corporation and the US tax is charged twice. The corporation pays 21% on its taxable income. When it distributes after-tax profit to the foreign owner as a dividend, that dividend is US-source income subject to 30% withholding under the statute. Stack the two and the total US cost of getting a dollar of profit home is meaningfully higher than a single layer — which is exactly why the second-layer rate is where treaties do their most valuable work.
What you buy for that second layer is containment. The corporation is its own US taxpayer; you as the foreign shareholder are not dragged into US filing simply for owning stock, and your personal liability is walled off from the business. For an owner who wants the US operation to be a self-contained unit — its own tax return, its own liabilities, its own audit exposure — the C-corp is the natural fit, and a treaty makes the double-tax math far more tolerable.
The 21% corporate tax is the same regardless of your home country. Treaties don't touch it. What a treaty reduces is the second layer — the withholding on dividends leaving the country — which can fall from 30% to 5% or even 0% for a qualifying corporate parent. So the real cost of the C-corp's double tax depends heavily on whether your country has a US treaty and whether you qualify under its limitation-on-benefits article. Model the after-treaty rate, not the statutory 30%, when you compare structures.
The LLC path: one layer, but you may be filing personally
An LLC is flexible: by default a single-member LLC is disregarded and a multi-member LLC is a partnership, but either can elect to be taxed as a corporation. Left in its default pass-through state, the LLC pays no entity-level income tax — profit is taxed once, to the owners. That avoids the C-corp's second layer. The trade-off is exposure: if the LLC earns income effectively connected with a US trade or business, that income is taxed to the foreign owner directly, which generally means the foreign owner has a US filing obligation of their own.
And the IRS does not wait for a distribution to collect. A partnership with a foreign partner and effectively connected income must withhold on that partner's allocable share at the highest applicable rate and remit it — regardless of whether any cash is actually distributed. So a foreign owner of a profitable pass-through can owe US withholding on paper profit they haven't received.
| Income type to the foreign owner | US treatment | Withholding |
|---|---|---|
| Effectively connected income (active US business) | Taxed at graduated rates; owner files a US return | Partnership withholds at the top rate on the foreign partner's share |
| FDAP income (dividends, interest, royalties) | Flat 30% statutory rate | 30% withheld at source, reduced by treaty |
| C-corp dividend to foreign shareholder | US-source dividend | 30% withheld, reduced by treaty |
| Capital gain (general, non-real-estate) | Often not US-taxable for a non-resident | Generally none |
The branch alternative, and the branch profits tax
A foreign company can also skip a US entity and operate as a branch — the foreign corporation doing business in the US directly. Its effectively connected income is taxed at the same 21% rate. To stop a branch from enjoying a one-layer advantage over a subsidiary, the branch profits tax applies a second-level charge on the branch's earnings treated as repatriated to the home office. The net effect roughly equalizes a branch and a subsidiary — while leaving the foreign parent directly exposed to US filing and liability.
First layer — corporate / ECI tax
A C-corp, a corporate-taxed LLC, and a branch all pay the 21% rate on their US taxable or effectively connected income. This layer is broadly structure-neutral.
Second layer — dividend withholding or branch profits tax
A corporation's distribution faces dividend withholding; a branch faces the branch profits tax on repatriated earnings. Both are the 'second layer,' and both are where a treaty reduces the rate.
Pass-through — one layer, owner-level
A pass-through LLC or partnership avoids the second layer entirely, but shifts the tax and the filing to the foreign owner, with withholding collected at the entity level on effectively connected income.
Matching the entity to the owner
Because the structures are costly to change later, the right move is to match the entity to how you actually operate and repatriate. A few patterns recur often enough to be useful defaults — each still needs to be tested against your treaty position and home-country tax.
- Durable US operation, want the parent shielded: C-corporation, with a treaty to cut dividend withholding
- Early-stage losses you want to use at home: a branch can let the parent absorb the losses
- Single foreign owner, simple holding or small operation: an LLC, with its tax classification chosen deliberately
- Multiple foreign owners with active US income: expect partnership withholding on effectively connected income
- Mostly passive US-source income (royalties, interest): focus on the FDAP withholding rate and the treaty that reduces it
- Any structure: confirm treaty eligibility and file the W-8 forms so payers withhold at the correct rate, not 30%
As a foreign owner, the entity choice comes down to whether you accept two layers of US tax for a clean liability and filing wall, or take one layer and accept a direct US filing obligation and entity-level withholding. A C-corporation contains US tax and shields you personally, at the cost of corporate tax plus dividend withholding — a cost a treaty can shrink from 30% toward 5% or 0%. A pass-through LLC avoids the second layer but taxes you as the income is earned and withholds before you see the cash. A branch equalizes the math with the branch profits tax while exposing the parent directly. Decide how you'll earn and repatriate, apply your treaty, file the W-8 to claim the reduced rate, and model both layers before you form the entity — reversing the choice later is the expensive path.
Pick the US entity that fits your tax, not just your paperwork
The right entity choice depends on your treaty position and how the double-tax, branch, and pass-through outcomes compare for your situation. Talk to our team about setting up the structure and withholding paperwork correctly from the start.
Talk to a tax proSources
- IRS — Publication 515, Withholding of Tax on Nonresident Aliens and Foreign Entities
- IRC Section 11 — Corporate income tax rate (21%)
- IRC Sections 871 and 881 — Tax on nonresident aliens and foreign corporations (30% on FDAP income)
- IRS — Partnership Withholding on Effectively Connected Income (IRC Section 1446)
- IRS — Branch Profits Tax (IRC Section 884)
- IRS — United States Income Tax Treaties A to Z
Frequently asked questions
For most foreign owners who want US tax and filing contained at the entity level, a C-corporation is the cleaner choice: it pays the 21% corporate tax, files its own return, and the foreign owner only faces US tax when profits are distributed as a dividend. An LLC can be simpler and avoid the second layer of tax, but as a pass-through it can pull the foreign owner into a direct US filing obligation and trigger mandatory withholding on the owner's share of income.
A C-corporation's profit is taxed twice: once at the corporate level at 21%, then again when it is distributed to the foreign owner as a dividend, which is subject to US withholding of 30% under the statute — often reduced by treaty. The combined effect is the price of the C-corp's clean liability wall and containment of US filing at the entity level.
It depends on the LLC's tax classification and its income. If the LLC is a partnership with effectively connected income, the partnership must withhold on a foreign partner's share of that income at the highest applicable rate and remit it to the IRS, whether or not cash is distributed. Passive US-source income like certain dividends or royalties is generally subject to 30% FDAP withholding, which a treaty may reduce.
The main ways are to use a pass-through structure so profit is taxed only once, or to reduce the second layer with a treaty. A treaty can cut dividend withholding from 30% to as low as 5% or 0% for a qualifying corporate parent, materially shrinking the cost of the second layer. But pass-through treatment comes with its own trade-off — a direct US filing obligation for the foreign owner — so the right answer depends on the specific facts.
