Most non-resident founders treat opening a US LLC as a five-minute exercise: pick a state, pay a service, get a certificate. It works — until it doesn't. The structure choices you make in the first hour of forming an LLC affect your taxes, your banking, your privacy, and your ability to wind the entity down years later.
This isn't a step-by-step. It's the framework for the decisions that actually matter, and the four mistakes that quietly cost non-resident founders the most money.
Decision 1: The State
The default advice — "use Wyoming" — is right more often than not, but it's not universal. State choice should follow your operating reality, not your Google search.
Wyoming. Default for most non-resident operators. No state income tax, ~$60 annual report fee, strong privacy (members aren't on public record), and a clean reputation with US banks. If your business has no US-based employees and no physical US presence, Wyoming is almost always the answer.
Delaware. Right when you plan to raise institutional capital. US VCs are conditioned to invest into Delaware C-corps and Delaware LLCs; everything else introduces friction. Higher annual franchise tax (~$300 minimum), and members do appear in some filings. If you're not raising VC, Delaware buys you nothing real and costs you more.
New Mexico. Maximum privacy. No annual report. Members never disclosed publicly. The trade-off: some banks treat New Mexico LLCs with extra scrutiny because it's the most popular "anonymous LLC" state, which can slow Mercury or Stripe onboarding. Use it if privacy is genuinely critical; otherwise Wyoming gives you 90% of the privacy benefit with smoother banking.
Florida. Right if you actually have US-based clients in Florida or plan to spend significant time there. Otherwise unnecessary — the annual report ($138.75) and the public manager disclosure are downsides without benefit.
Texas, Nevada, others. Niche. Generally not the right answer for a non-resident with no US ties.
The wrong reason to pick a state is "I heard Delaware is best." Delaware is best for very specific situations. The right question is what is the rest of my operation going to look like?
Decision 2: The Registered Agent
A registered agent is mandatory. Their job is trivial — receive legal mail at a US address on behalf of the LLC. The pricing for this service ranges from $50/year to $300/year for the same functional output.
What actually matters:
- They forward mail reliably. Some cheap agents lose mail. Real penalty risk if a state notice gets lost.
- They don't list you in any public-facing directory beyond what the state requires. Some agents publish member info on their own websites.
- They include compliance reminders. The good agents email you when your annual report is due.
- They don't auto-bill you for "compliance services" you didn't ask for. Several major brand-name agents do this.
Pay $100-$200/year, get a service that bundles email forwarding and compliance reminders, and stop thinking about it. Avoid the $40 services that nickel-and-dime you on every state filing.
Decision 3: The EIN Path
This is where most non-residents get stuck.
The IRS issues EINs to non-residents through a specific path: Form SS-4 + a phone call (or fax) to the IRS international line. With no SSN and no ITIN, you cannot apply online.
Three realistic options:
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DIY via fax/phone. Free, but takes 4-12 weeks. Requires reading the SS-4 instructions carefully and being available to respond to IRS callbacks. Workable if you have time.
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Through a service provider with direct IRS lines. $200-$500. Some providers (we're one of them) have dedicated IRS contacts and turn EINs around in 1-3 weeks.
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Apply for an ITIN first, then EIN online. Adds 8-12 weeks for the ITIN itself, then EIN is instant online. Worth doing if you also need an ITIN for personal banking and credit cards — otherwise it's a long detour.
The mistake to avoid: paying for an "instant EIN" service that promises 24-hour turnaround for $50. These services either cannot deliver, or deliver an EIN issued in your name personally (using SSN-equivalent shortcuts) which then creates filing problems forever.
Decision 4: The Banking
US business banking for a non-resident-owned LLC has narrowed to a few real options:
- Mercury. Default. Online onboarding, no monthly fees, supports international wires. Works for most non-resident clients out of the box.
- Relay. Solid alternative. Slightly more flexible on industry restrictions. Some operators prefer it for crypto-adjacent businesses Mercury declines.
- Wise Business. Multi-currency-first. Not a US bank in the traditional sense — better thought of as an international payments platform with a US footprint. Useful as a second account, not a primary.
Mercury and Relay both handle KYC for non-resident-owned LLCs natively. Both will reject applications where the LLC has been formed in suspicious ways — typically when the registered agent address is in a state that doesn't match the application or when the EIN has been obtained through one of the shortcut services mentioned above.
The mistake: opening a banking account in your personal name for the LLC's business and intending to "fix it later." Once you have months of mixed personal/business transactions in a personal account, regularizing this is painful.
Decision 5: The Tax Filing Setup
The forms a non-resident-owned LLC must file every year:
- Single-member, foreign-owned: Form 5472 + pro forma 1120, due April 15. Penalty for missing: $25,000.
- Multi-member: Form 1065 + Schedule K-1s for each partner, due March 15. Penalty: $235/month/partner.
- All LLCs: BOI report to FinCEN within 30 days of formation, with 30-day updates for changes.
- State annual report: due varies by state. Penalty: usually $50-$200, but persistent failure means administrative dissolution — the LLC stops legally existing.
The mistake: assuming "no US tax owed = no US filings required." The filings are mandatory regardless of whether tax is owed. The $25k penalty for missing Form 5472 has zero relationship to your revenue.
Set up the recurring filing calendar at the moment of formation. Don't wait until April of the following year to figure out who files what.
The Four Mistakes That Cost Real Money
1. Picking the state by reputation, not fit.
Cost: $200-$2,000 in unnecessary annual fees, plus banking friction. Frequency: extremely common. Pattern: founder picks Delaware because they've heard of it, then spends $300 on franchise tax every year and gets slower banking onboarding than they would have in Wyoming.
2. Skipping the EIN until "later."
Cost: 4-12 weeks of operational delay, lost contracts, banking blocked. Frequency: very common. Pattern: founder opens the LLC, starts marketing, lands a client, then realizes they cannot invoice or open banking without the EIN.
3. Mixing personal and business finances.
Cost: legal protection compromised, hours of accounting cleanup, possible tax restatement. Frequency: universal. Pattern: founder uses personal credit card for AWS and Stripe, then transfers funds in/out of personal account to "smooth cash flow." After a year, the LLC's separateness is questionable in court — meaning the liability shield may not hold up if challenged.
4. Missing Form 5472 / 1065.
Cost: $25,000 (single-member) or several thousand (multi-member). Frequency: depressingly common among non-residents. Pattern: founder believes "I owe no US tax, so I have no filings." First year passes with no filing. Second year passes. By year three, penalties have compounded and the IRS has flagged the structure.
How the Process Actually Plays Out
For a clean non-resident LLC setup, the realistic timeline:
- Week 1: State filing (Articles of Organization). Same day in Wyoming/New Mexico, slightly longer in Delaware.
- Week 1: BOI filing to FinCEN.
- Week 1-3: EIN application (depending on path).
- Week 3-4: Mercury/Relay onboarding once EIN is in hand.
- Week 4: Operating Agreement signed, books opened, accounting software (Bench, QuickBooks, or similar) configured.
- Annual: Form 5472 + pro forma 1120 (or Form 1065), state annual report, BOI updates as needed.
End-to-end: 4 weeks for full operational setup. Annual ongoing: 1-2 hours of tax filing time if the books are clean, more if you're scrambling.
The Help Worth Paying For
The DIY path is real and works, but it absorbs 20-40 hours of founder time across the first month, plus ongoing time on tax filings. For most operating founders, the math favors using a service for at least:
- The EIN (because the IRS path is opaque)
- The first year of tax filings (because the consequences of mistakes are large)
State filing and registered agent can stay DIY if you want to save money. Banking is always self-service.
At Leasum, we run the end-to-end formation for non-resident founders — state filing, EIN with our direct IRS line (1-3 weeks instead of 4-12), Mercury/Relay introduction, BOI submission, and the recurring annual filings. Most clients are operational within 7-14 days and don't think about US compliance again until the next April.
