How the treaty cuts US tax to almost nothing
The Convention Between the United States and the Swiss Confederation for the Avoidance of Double Taxation was signed October 2, 1996, entered into force in 1998, and was modernized by a 2009 Protocol. It governs how Washington and Bern split the right to tax cross-border income. For a Swiss resident who owns a Wyoming LLC, three articles matter.
Article 7 - Business Profits. This is the core protection. Under Article 7, the business profits of a Swiss resident are taxable in the US only to the extent they are attributable to a US "permanent establishment" (PE) - a fixed place of business such as an office, a branch, a warehouse, or a dependent agent operating on your behalf inside the US. If your Wyoming LLC has no US office, no US employees, no US inventory you control, and no dependent US agent, it has no permanent establishment. No PE means the US cannot tax your operating profit. A Swiss SaaS founder selling subscriptions to American customers from a laptop in Zurich has no US permanent establishment, even though every customer is American.
Article 10 - Dividends. This applies if a US corporation pays you dividends (not your own LLC's profit - your single-member LLC's profit is not a dividend). The default US withholding rate on dividends paid to a non-resident is 30%. The treaty cuts it to 5% where you hold at least 10% of the voting stock of the paying company, and 15% in all other (portfolio) cases.
Article 12 - Royalties. The treaty exempts royalties from US withholding tax in most cases - a rate of 0%. That covers licensing of patents, trademarks, copyrights, software, and similar intellectual property. Against the 30% default, this is one of the most generous royalty provisions of any US treaty, which matters a great deal for Swiss software and IP-licensing businesses.
Interest is likewise generally exempt (0%) under the treaty for most interest types.
Treaty rate table
| Income type | US default (no treaty) | Switzerland-US treaty rate | Governing article |
|---|---|---|---|
| Active business profits | Taxed if effectively connected | 0% if no US permanent establishment | Article 7 |
| Dividends (≥10% ownership) | 30% | 5% | Article 10 |
| Dividends (portfolio) | 30% | 15% | Article 10 |
| Royalties (IP licensing) | 30% | 0% | Article 12 |
| Interest (most types) | 30% | 0% | Article 11 |
Rate sources: IRS published US-Switzerland tax treaty text (irs.gov/pub/irs-trty/swiss.pdf) and the US Treasury Technical Explanation. The 30% statutory non-resident withholding default is set by IRC §1441.
Why the LLC structure does the heavy lifting
A US single-member LLC owned by one non-US person is, by default, a "disregarded entity" for federal tax. The IRS looks through the LLC to its owner. There is no entity-level US corporate tax. Income passes through to you, the Swiss owner. Combine that pass-through nature with Article 7, and the result is clean: if your business has no US permanent establishment, the income flows through to a Swiss resident whom the treaty shields from US tax on business profits. The US collects nothing on the operating revenue.
This is the structural reason a Wyoming LLC is so popular with Swiss founders. You get a US legal entity, a US bank account, and the ability to invoice and accept payments in dollars - without inheriting a US corporate tax bill. Wyoming specifically adds privacy (member and manager names are not listed on public formation filings) and the strongest charging-order asset protection in the US.
How Switzerland taxes your US LLC
This is where Swiss founders need to slow down. The treaty protects you from the US; it does not protect you from your own country.
The Swiss Federal Tax Administration generally treats a US LLC as transparent - a pass-through - for Swiss tax purposes, mirroring its US treatment. That means the LLC's income is generally attributed to you personally and flows onto your Swiss tax return. You then pay Swiss federal income tax plus your cantonal and communal income tax on that profit.
Switzerland's tax stack matters here because rates vary enormously by canton. The federal direct tax is modest, but the combined effective burden on individuals and companies depends heavily on where you live. For corporate income, the combined effective rate ranges from roughly 11.85% in Zug to about 21% in Bern (PwC Tax Summaries, 2026). Personal income tax on pass-through LLC profit similarly stacks federal, cantonal, and communal layers - a founder in Zug or Schwyz pays far less than one in Geneva or Vaud.
Two further Swiss-specific points:
Cantonal wealth tax. Switzerland is one of the few countries that still levies an annual net wealth tax at the cantonal level. Your equity stake in the US LLC - its value as an asset - can be included in your taxable net wealth, even though the income is taxed separately. Rates are small (typically a fraction of a percent) but they apply to the asset value, not the income.
Recognition is not automatic. While the FTA usually treats US LLCs as transparent, characterization can depend on the LLC's specific features and how it is structured. Some structures can be treated as opaque (corporate-like), which changes the result. This is precisely why you should retain a Swiss Treuhänder (a fiduciary/tax advisor) who can confirm canton-specific treatment before you rely on a particular outcome.
The one US filing you cannot skip: Form 5472
Here is the trap that catches Swiss founders who assume "no US tax" means "no US paperwork." It does not.
A foreign-owned single-member US LLC is treated as a disregarded entity but, since 2017, must file IRS Form 5472 together with a pro forma Form 1120 every year. This is an information return, not a tax return - it reports "reportable transactions" between you and your LLC (capital you contributed, money you withdrew, and similar). You owe no tax with it if you have no US permanent establishment, but you must file it.
The penalty for not filing, or for filing something substantially incomplete, is $25,000 per year under IRC §6038A(d)(1) (IRS Instructions for Form 5472). Submitting the Form 5472 without the accompanying pro forma 1120 - or vice versa - counts as a failure to file and triggers the same penalty. If the failure continues beyond 90 days after IRS notice, an additional $25,000 applies for each 30-day period, with no statutory cap.
Key 2026 dates (IRS): for the 2025 tax year, Form 5472 plus the pro forma 1120 is due April 15, 2026. Filing Form 7004 by that date extends the deadline to October 15, 2026. The package is filed by mail or fax to the IRS unit in Ogden, Utah, with "Foreign-owned US DE" written across the top of both forms.
You can file this yourself or use WyomingLLC's compliance add-on. Either way, treat it as non-negotiable. The treaty is generous on tax; the IRS is not generous on filing.
Step-by-step: a Swiss founder's setup checklist
- Form the Wyoming LLC. Online, no US visit, passport only. Through WyomingLLC this is $397 all-in, with the Wyoming state filing fee included. Formation completes in about 24 hours.
- Get the EIN. Your federal tax ID, needed for banking and the 5472. Typically 8-10 business days for non-US founders.
- Open a US business bank account. Mercury and Relay accept most Switzerland-based founders; both run on a clean Swiss documentation profile. Wise Business is the widely-used, reliable fallback that accepts almost every country. Plan on roughly 8-10 business days after the EIN.
- Confirm no US permanent establishment. No US office, US staff, US-controlled inventory, or dependent US agent. This keeps Article 7 working in your favor.
- Keep clean books. Track every transfer between you and the LLC - these are the "reportable transactions" for Form 5472.
- File Form 5472 + pro forma 1120 annually. Due April 15 each year. $25,000 penalty for missing it.
- Declare the income in Switzerland. Report the pass-through profit on your Swiss return; pay federal, cantonal, and communal income tax. Include the LLC equity for cantonal wealth tax if applicable.
- Confirm canton treatment with a Treuhänder. One conversation up front prevents a characterization surprise later.
Banking notes for Swiss founders
Switzerland has transparent, well-regarded business registries, so Swiss founders generally present a clean profile to US fintech banks. Mercury and Relay accept most Switzerland-based applicants and usually decide within a few business days. If you are ever declined - the most common cause is an incomplete or inconsistent application, not your country - Wise Business is the safest fallback because it onboards founders from nearly every jurisdiction. None of these require you to travel to the US; the entire setup is remote.
A practical tip: keep your Swiss home address, your Wyoming registered-agent address, and your business description consistent across the LLC formation, the EIN application, and the bank application. Mismatches are the single biggest cause of fintech delays.
A worked example: a Zurich SaaS founder
Numbers make the structure concrete. Suppose a Swiss-resident founder living in the canton of Zurich runs a SaaS product through a single-member Wyoming LLC and earns $200,000 of operating profit in a year, billing customers in the US, the EU, and Asia. She has no US office, no US staff, and no US-controlled inventory - she writes code and runs the business from Zurich.
- US federal income tax on the operating profit: $0. Article 7 keeps business profits out of the US net because there is no US permanent establishment, and the single-member LLC passes the income through to her as a Swiss resident.
- US withholding: $0 on the operating revenue. Subscription revenue is business income, not FDAP - there is no dividend, interest, or royalty for the 30% default (IRC §1441) to attach to.
- US filing: Form 5472 + pro forma 1120, due April 15. Tax owed with it: $0. Penalty for skipping it: $25,000.
- Swiss tax: the profit flows to her personal Swiss return and is taxed at the combined federal + cantonal + communal rate for Zurich, plus any cantonal wealth tax on the LLC equity value.
Now change one fact. Suppose she also parks $300,000 of dividend-paying US stock inside the same LLC. Those dividends are FDAP. With a properly filed W-8BEN-E claiming the portfolio rate under Article 10, US withholding is 15% rather than 30% - a real saving, but still a 15% leak that did not exist on the operating revenue. The lesson Swiss founders should take from both halves of this example: the Wyoming LLC is superb for operating income and merely adequate for passive US-source income. Keep US investment portfolios out of the operating LLC unless you have a specific reason and have modeled the withholding.
Withholding-rate comparison: with vs without the treaty
| Annual US-source income | At 30% default | At Swiss treaty rate | Saved |
|---|---|---|---|
| $50,000 royalties | $15,000 withheld | $0 (Art. 12) | $15,000 |
| $50,000 portfolio dividends | $15,000 withheld | $7,500 (15%, Art. 10) | $7,500 |
| $50,000 qualifying dividends (≥10%) | $15,000 withheld | $2,500 (5%, Art. 10) | $12,500 |
| $50,000 interest | $15,000 withheld | $0 (Art. 11) | $15,000 |
Every reduced rate above is conditional on a valid W-8BEN-E being on file with the US payer. With no form, US law (IRC §1441) requires the payer to withhold the full 30% regardless of the treaty.
How a Swiss founder claims the treaty: the W-8BEN-E
The treaty rate is not automatic. You claim it by giving each US payer a Form W-8BEN-E - the entity version of the W-8 (do not confuse it with W-8BEN, which is for individuals). For a Swiss-owned single-member Wyoming LLC, the key lines are:
- Line 1 - the LLC's legal name.
- Line 4 - Chapter 3 status: tick Disregarded entity (the default for a single-member LLC).
- Line 5 - Country of residence: Switzerland.
- Line 6 - Permanent residence address in Switzerland (not the Wyoming registered-agent address).
- Line 8 - US TIN: your LLC's EIN.
- Line 9 - Foreign TIN: your Swiss tax identification number (AHV/AVS number or the cantonal tax ID, as applicable).
- Part III - Claim of treaty benefits: certify Swiss residency and cite the relevant article - Article 12 for royalties (0%), Article 11 for interest (0%), or Article 10 for dividends (5% or 15%). For Article 7 business-profits protection, the position is taken on your filings rather than by reducing a withholding rate.
Submit a fresh W-8BEN-E to each US payer that could touch FDAP - Stripe, a US licensee, a brand sponsor, a US brokerage. Each maintains its own withholding records. The form is generally valid through the end of the third calendar year after signing, so a form signed in 2026 lapses at the end of 2029; diarize the renewal or the payer reverts to the 30% default.
Permanent establishment: the edge cases that actually matter
"No US permanent establishment" is easy to state and easy to break by accident as you scale. Article 5 of the treaty defines a PE as a fixed place of business - and the gray zones for Swiss founders are predictable:
- Hiring a US employee. A dependent US-based employee who habitually concludes contracts on your behalf can create a PE. A contractor who is genuinely independent and acts for multiple clients generally does not, but the line is fact-specific.
- Renting US office or co-working space in your LLC's name is a textbook fixed place of business.
- Holding inventory you control in a US warehouse (classic for Amazon FBA) is the most unsettled area - IRS guidance on whether FBA inventory creates a US trade or business is not clear-cut, so FBA founders should get specific US advice rather than assuming the clean SaaS result.
- Using US cloud infrastructure (AWS, Vercel) and selling to US customers does not create a PE. Servers you merely rent capacity on are not your fixed place of business, and a customer base is not an establishment.
If you stay laptop-and-cloud in Switzerland, you are firmly in the no-PE zone. The moment you put people or controlled physical assets on US soil, get a US CPA to review before you commit.
How the Swiss treaty compares to its peers
Swiss founders sometimes ask whether they would be better off forming through a different residency or entity. For the income types most founders actually touch, the Swiss treaty is at or near the top of the table.
| Treaty country | Royalties | Portfolio dividends | Business profits (no PE) |
|---|---|---|---|
| Switzerland | 0% | 15% | Not US-taxed (Art. 7) |
| Netherlands | 0% | 15% | Not US-taxed (Art. 7) |
| United Kingdom | 0% | 15% | Not US-taxed (Art. 7) |
| India | 15% | 25% (15% for ≥10% corporate) | Not US-taxed |
| Pakistan | 0% (most types) | 15% | Not US-taxed |
| Brazil (no treaty) | 30% | 30% | Not US-taxed (domestic ECI rule) |
The headline: Switzerland's 0% royalty rate matches the best EU treaties, and for operating businesses every treaty country lands in the same place - zero US tax on non-PE business profit - because that outcome flows as much from US domestic non-resident rules as from the treaty itself. The treaty's real, distinctive value to a Swiss founder is on royalties and interest.
A note on the FATCA backdrop
Switzerland and the US have a long history of information exchange. Switzerland was central to the rollout of FATCA (the US Foreign Account Tax Compliance Act) and operates under an intergovernmental agreement with the US. For a Swiss founder this mostly means one thing: assume transparency. Report your US LLC income honestly in Switzerland and file your US Form 5472 on time. The structure described here is fully compliant when done correctly - its tax efficiency comes from the treaty and the LLC's pass-through nature, not from anything hidden.
A related federal point worth separating from the treaty: the Corporate Transparency Act requires beneficial-ownership reporting to FinCEN, but in March 2025 FinCEN issued an interim final rule that exempts US-formed (domestic) entities and narrows mandatory BOI reporting to certain foreign entities. Because the scope has shifted, confirm current FinCEN BOI applicability for your specific structure rather than relying on older write-ups. This is a separate layer from both the treaty and Form 5472.
Bottom line for Swiss founders
The Switzerland-US treaty plus the disregarded-entity structure produces one of the cleanest cross-border outcomes available: zero US federal income tax on operating profit (Article 7, no PE), 0% withholding on royalties and interest (Articles 11 and 12), and reduced 5%/15% rates on dividends (Article 10). The catches are not the tax - they are the mandatory $25,000-penalty Form 5472, the need to file a current W-8BEN-E to actually claim treaty rates, and the Swiss-side income tax (federal + cantonal + communal) plus possible cantonal wealth tax that your Treuhänder must confirm. Get those right and the structure does exactly what Swiss founders want.
This article is general information, not tax or legal advice. Swiss cantonal treatment and US permanent-establishment analysis are fact-specific. Confirm your situation with a Swiss Treuhänder and a US CPA.
Sources: IRS - US-Switzerland Tax Treaty text · US Treasury - Technical Explanation of the Switzerland Convention · IRS - Instructions for Form 5472 · PwC Tax Summaries - Switzerland Corporate Taxes (2026)
