Quick Answer for Foreign Founders:
- C-Corp: best for fundraising, issuing equity, and scaling with US investors.
- LLC: best for small, service-based, or owner-controlled businesses.
- Both require Form 5472 compliance from the year of formation.
- The wrong choice can trigger direct US personal tax exposure for the foreign founder.
- Neither structure allows an S-Corp election when the owner is a non-US resident.
If you are a non-US resident setting up a US business entity, Delaware is almost certainly the state you will use. Its court system is predictable, its statutes are well-developed, and most US venture capital firms expect it. But Delaware gives you two paths: a C-Corporation or a Limited Liability Company.
The decision is not just administrative. It shapes every major tax obligation you will have in the United States for the life of the entity. One option is off the table entirely: non-US residents cannot own an S-Corporation under US tax law. Your choice is C-Corp or LLC, full stop.
This post walks through how each structure works for a non-US founder, where the tax exposure actually begins, and when one is clearly the right answer.
The Fundamental Tax Difference
A C-Corp is taxed at the entity level at 21%. Without an election, an LLC passes income directly to the owner, where it can be taxed at rates up to 37%.
A C-Corporation is taxed as a separate legal entity. The corporation pays US federal corporate income tax on its taxable income. As a foreign shareholder, you are only taxed when you receive a dividend or sell shares. The dividend withholding rate is typically 30% at the federal level, though it can be reduced under an applicable tax treaty.
An LLC, by default, is treated as a disregarded entity or pass-through. For a single-member LLC owned by a non-US resident, the LLC is treated as invisible to the IRS for tax purposes and the income flows directly to you as the owner. If that income is Effectively Connected Income, you may be required to file a US return and pay tax at graduated rates up to 37%.
Two terms matter here. Effectively Connected Income, or ECI, is income tied to an active US trade or business, taxed at regular rates on net income after deductions. FDAP, which stands for Fixed, Determinable, Annual, or Periodical income, covers passive US-source income like dividends and interest, taxed at 30% on gross with no deductions allowed. If you are unsure how your income is classified, that question needs an answer before you choose your structure. Our breakdown on how ECI and FDAP work for foreign-owned US entities covers both in full.
In simple terms: the C-Corp pays tax so you do not have to. The LLC makes you pay it directly.
What Delaware Formation Actually Requires
Both entities are formed through the Delaware Division of Corporations and are open to non-US residents. Neither requires physical presence in Delaware to form or operate.
IRS Filing Obligations for Foreign Owners
Both structures require Form 5472. The difference is what else they require on top of it.
In simple terms: the C-Corp keeps your personal US tax exposure off the table unless you take money out. The LLC puts it on the table by default.
Capital Raising: Where the C-Corp Has a Clear Advantage
If you plan to raise institutional capital, the C-Corp is not just the better choice. It is in most cases the only viable one.
US VC firms invest through preferred stock. That structure is straightforward in a Delaware C-Corp and awkward or impossible in an LLC. Most institutional investors will not invest in an LLC at all because pass-through taxation creates unrelated business taxable income problems for tax-exempt investors such as university endowments and pension funds.
An LLC can work well for a foreign-owned consulting firm, a service business with limited US clients, or a distribution entity. It is not the right structure for a startup seeking institutional equity.
Tax on Exit
For foreign founders selling their US entity, the C-Corp is generally the more favorable structure at exit. The LLC is not.
A C-Corp exit usually means a sale of shares. Gains from selling shares in a US C-Corp are generally not subject to US tax for a non-US resident unless the shares qualify as US real property interests under FIRPTA. A standard operating company typically does not meet that threshold.
An LLC exit usually means a sale of membership interests or assets. If the LLC has been conducting a US trade or business, the gain on sale may be treated as ECI and taxed at ordinary rates. IRC Section 864(c)(8) was added specifically to capture foreign partners' gains on sales of partnership interests attributable to ECI, creating substantial complexity that did not previously exist for foreign LLC owners.
How these rules interact with your country of residence and any applicable treaty is a facts-and-circumstances determination. The framework above tells you what to watch for. What applies to your situation requires a closer look.
The LLC Tax Classification Election
An LLC can be taxed as a C-Corporation without dissolving and reforming the entity. It requires filing Form 8832 with the IRS.
If you have already formed an LLC but your situation has changed, this election changes how the LLC is treated for federal tax purposes at the entity level. The state-level structure stays the same. The election has timing rules and implications for contributions and distributions made before and after the change. It is not a simple administrative step.
Understanding what your LLC's current tax classification is, and what changes if you elect out of it, is the starting point for this decision. The full range of LLC classification options and when each one makes sense is covered in our dedicated post.
When NOT to Choose Each Structure
Knowing when a structure is wrong is as useful as knowing when it is right.
Do not choose a C-Corp if:
- You are running a solo consulting or service business with no plans to raise capital.
- You want to extract profits regularly without triggering double taxation on distributions.
- Your business model does not require equity compensation or outside investors.
- Board formalities, annual returns, and capitalization tracking are a genuine constraint at your current stage.
Do not choose an LLC if:
- You are raising or plan to raise from US institutional investors.
- You want to issue options or equity to employees and advisors.
- Your exit strategy involves selling to a strategic acquirer who expects clean corporate structure.
- Your income is ECI and you want to keep your personal US tax exposure separate from business income.
The wrong answer here is not always obvious at formation. It usually becomes clear after the first funding conversation or the first tax return, at which point restructuring is the only option.
Ongoing Compliance After Formation
Both structures require active maintenance from the year of formation, regardless of income or activity level.
Both entities require:
- Annual filing with the Delaware Division of Corporations and payment of the annual fee or franchise tax.
- A Delaware registered agent at all times.
- An EIN from the IRS obtained before the first filing.
- Form 5472 filed annually for as long as the foreign ownership relationship exists.
- Separate bank accounts and clean recordkeeping to document all transactions between the entity and its foreign owner.
C-Corp additional requirements:
- Annual Form 1120 corporate return regardless of income or activity.
- Board resolutions, meeting minutes, and corporate formalities as required under Delaware law.
- Stock ledger and capitalization table maintained from the date of incorporation.
LLC additional requirements:
- Pro forma Form 1120 as the filing mechanism for Form 5472 for disregarded entities.
- A Form 1065 partnership return if the LLC has multiple members.
Missing the Delaware annual fee causes the entity to lose its good standing status, which can invalidate contracts and create problems with banks and investors. What ongoing compliance looks like once your entity is active, including what most foreign-owned businesses miss in the first year, is covered in our Compliance 101 guide.
One Decision That Is Difficult to Reverse
Converting between structures can be a taxable event. It is not an administrative change.
Depending on how assets, IP, and cash have moved through the entity since formation, a conversion can trigger gain recognition and create a tax liability at the moment of restructuring. Changing course after a funding round, after IP has been contributed, or after significant revenue has been earned is a more complex and expensive process than most founders anticipate.
If your existing structure involves a foreign corporation and you are unsure whether a Form 5471 obligation exists alongside your US entity, both questions belong in the same review. International reporting obligations and entity structure decisions are connected, and resolving one without the other leaves exposure on the table.
If you want that review done properly, we handle it here.
This post is for general informational purposes only and does not constitute professional tax, legal, or accounting advice for your specific situation. Reading this post does not create a CPA-client relationship. Tax laws are complex and subject to change. If you would like advice tailored to your situation, consult a qualified tax professional, including through the services offered on this site.