If you are a non-US resident setting up a US business entity, Delaware is almost certainly the state you will use. The choice within Delaware is between a C-Corporation and a Limited Liability Company. The decision shapes every major tax obligation you will have in the United States for the life of the entity.
Quick Answer
C-Corp fits founders raising institutional capital, issuing equity, or scaling toward an exit. LLC fits smaller, owner-controlled, or service-based businesses. Both structures require Form 5472 from the year of formation. The S-Corp election is unavailable for foreign owners under any structure.
1. The Fundamental Tax Difference
A C-Corporation is taxed as a separate legal entity. The corporation pays US federal corporate income tax on its taxable income at 21%. 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, often reduced under an applicable tax treaty.
An LLC, by default, is treated as a disregarded entity (single-member) or a partnership (multi-member) for tax purposes. For a single-member LLC owned by a non-US resident, the LLC is treated as transparent for tax purposes and the income flows directly to the owner. If that income is Effectively Connected Income, you may file Form 1040-NR personally and pay tax at graduated rates up to 37%.
In simple terms: the C-Corp pays tax at the entity level so the foreign owner is not in the personal US tax system unless there is a salary or distribution. The LLC moves the tax to the owner, with the rate determined by personal income brackets.
Whether your activity creates ECI is the threshold question. Our post on ECI vs FDAP covers the framework that determines how each type of income is taxed.
2. What Delaware Formation 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.
- C-Corp formation: Certificate of Incorporation, Bylaws, organizational resolutions, and a stock ledger from day one. Annual Delaware franchise tax with a $175 minimum and a $50 annual report fee, due March 1.
- LLC formation: Certificate of Formation and an Operating Agreement. Annual Delaware franchise tax of $300 due June 1.
- Both: a Delaware registered agent at all times, an EIN before any filings, and Form 5472 every year for as long as foreign ownership exists.
3. IRS Filing Obligations for Foreign Owners
Both structures require Form 5472. The difference is what else they require on top of it.
- Foreign-owned C-Corp: Form 1120 corporate return every year regardless of income. Form 5472 attached for each related foreign party with reportable transactions.
- Foreign-owned single-member LLC (disregarded): pro forma Form 1120 with Form 5472 attached. The pro forma 1120 is a simplified cover sheet, not a full corporate return.
- Foreign-owned multi-member LLC (partnership): Form 1065 partnership return with Schedules K-1 to each foreign owner, plus Form 5472 if required for related-party transactions.
Personal-side filing depends on the structure. C-Corp owners generally avoid a personal US filing unless they take a salary for US-based services or receive dividends with insufficient withholding. LLC owners with ECI typically file Form 1040-NR personally.
4. Side-by-Side Comparison
The decision frame at a glance:
| Feature | Delaware C-Corp | Single-Member LLC |
|---|---|---|
| Federal income tax | 21% at entity level | Pass-through to owner |
| Foreign owner personal filing | None unless dividend or salary | Form 1040-NR if ECI |
| Form 5472 obligation | Yes, every year | Yes, every year |
| Suitable for VC investment | Yes | Generally no |
| S-Corp election available | No (foreign owner restriction) | No (foreign owner restriction) |
| Annual compliance burden | Higher (board, formal filings) | Lower |
| Delaware franchise tax | Min $175 (assumed par value) | $300 flat |
| Ease of issuing equity options | High | Low |
| Exit via stock sale | Generally tax-favorable for foreign owners (subject to FIRPTA) | Gain may be ECI under Section 864(c)(8) |
If you are still at the formation stage, the structuring decision affects every year that follows. An international tax consultation runs the comparison against your country of residence and funding plans.
5. Capital Raising
If you plan to raise institutional US capital, the C-Corp is in most cases the only viable structure.
US venture capital 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 LPs (university endowments, pension funds) that fund their 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.
6. The Funding Round Conversion Problem
This is the most common structural mistake for foreign founders, and it is worth its own section because the cost is high and the timing is predictable.
The pattern: a founder forms an LLC at seed stage, takes a SAFE or convertible note from US investors, then needs to convert to a C-Corp at the priced round because the lead investor requires a corporate structure.
Conversion is a deemed liquidation for tax purposes. Depending on what has moved through the LLC since formation (capital contributions, distributions, IP transfers), conversion can trigger gain recognition as if the LLC's assets were distributed to the owner at fair market value. The bill arrives at the moment of restructuring, often when the founder is least able to absorb it.
The cleaner sequence is to form as a C-Corp from day one if institutional capital is on the roadmap. The cost of running a dormant or low-revenue C-Corp for the first year is small. The cost of converting later is not.
7. Tax on Exit
For foreign founders selling their US entity, the C-Corp is generally more favorable at exit than the LLC. The framework matters more than the specific outcome, which depends on facts.
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, but the analysis is fact-specific and the FIRPTA rules are technical.
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 matters as much as the entity type. The framework above tells you what to watch for. What applies to your specific exit requires a closer look at the facts and the treaty position.
8. When Each Structure Is Wrong
Knowing when a structure is wrong is as useful as knowing when it is right.
Do not pick 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 real burden at your current stage
Do not pick an LLC if:
- You are raising or plan to raise from US institutional investors
- You want to issue stock options or equity to employees and advisors
- Your exit strategy involves selling to a strategic acquirer who expects clean corporate structure
- You want to keep your personal US tax exposure separate from business income generated through US operations
Once the entity is active, ongoing compliance applies regardless of structure. Our Compliance 101 guide covers Secretary of State filings, registered agents, and the multi-state obligations both structures share.
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.