Estimate the US federal tax obligations of a non-resident-owned US LLC. Most non-resident-owned single-member LLCs without US-source ECI owe no US income tax but must file Form 5472 + pro-forma 1120 annually. The snapshot lays out the four standard scenarios.
Tell the tool whether the LLC is a single-member entity owned by one non-resident or a multi-member entity with at least one non-resident partner. The default federal tax classification differs: a single-member LLC is a disregarded entity filing Form 5472 with a pro-forma 1120, while a multi-member LLC is a partnership filing Form 1065. The structure decides which forms apply and how any US-taxable income flows to the owners.
Classify the LLC's income as Effectively Connected Income, FDAP, or none. Effectively Connected Income comes from a US trade or business and is taxed at standard US rates. FDAP income - fixed or determinable interest, dividends, and royalties - is taxed at a flat 30 percent or a lower treaty rate. An LLC with no US-source income owes no US income tax, though it still has an information-filing duty.
Each scenario returns a filing checklist and an order-of-magnitude tax estimate. The checklist names the exact forms - Form 5472, Form 1120, Form 1065, Schedule K-1, Form 1042-S withholding, and Form 1040-NR where a personal return is required. The estimate sizes the potential federal tax, and it is a planning figure rather than a substitute for a US tax preparer who reviews your actual facts.
The tool flags whether the owner needs an Individual Taxpayer Identification Number. An ITIN is required to file Form 1040-NR when the LLC has US-source Effectively Connected Income, and to claim a tax treaty benefit that lowers FDAP withholding. An owner of a single-member LLC with no US-source income needs no ITIN. Anonymousllc.co obtains an ITIN through Form W-7 and a certified passport copy for $299.
Wyoming-fulfilled, EIN included. Most non-resident founders pair this with $99 EIN and $299 ITIN.
See Formation - $397Static snapshot pulled from current state filing fees, statutes, and pricing data. Updates when source data changes.
| Scenario | Structure | Income type | Filings required | Tax outcome |
|---|---|---|---|---|
| Non-resident SMLLC, no US-source income | Disregarded SMLLC | None US-source | Form 5472 + pro-forma 1120 annually | Zero US income tax |
| Non-resident SMLLC, US-source ECI | Disregarded SMLLC | ECI (US trade or business) | Form 5472 + 1120 + owner Form 1040-NR (with ITIN) | Standard US income tax on net ECI |
| Non-resident SMLLC, US-source FDAP | Disregarded SMLLC | FDAP (interest, dividends, royalties) | Form 1042/1042-S withholding + Form 5472 + 1120 | 30% withholding (or treaty rate 5-15%) |
| Multi-member LLC with non-resident | Partnership (1065) | ECI portion to non-resident | Form 1065 + K-1 + Form 8804/8805 + 1040-NR for owner | Partnership withholds on non-resident's ECI share |
| Non-resident LLC electing C-corp | C-corp election (Form 8832) | Corporate income | Form 1120 + standard corporate filings | 21% corporate tax + 30% withholding on dividends to owner |
Non-resident = not a US citizen, not a US tax resident under the substantial-presence test, no green card. ECI = Effectively Connected Income from a US trade or business. FDAP = Fixed, Determinable, Annual or Periodic income. Order-of-magnitude only; consult a US tax preparer for actual filings.
No income tax, but yes to an information filing. A foreign founder who forms a US LLC to invoice international clients, with no US employees, no US warehouse, and no US-located inventory, has no US-source Effectively Connected Income and owes no US income tax. The filing duty remains. Form 5472, the Information Return of a 25% Foreign-Owned U.S. Corporation, plus a pro-forma Form 1120 must be filed every year. This is the single most-missed obligation for non-resident LLC owners, and the penalty for missing it is $25,000 per violation per year, which makes it the highest-risk item on the compliance list even when zero tax is due.
Effectively Connected Income is triggered when the LLC carries on a US trade or business - US employees, a US office, US-located inventory, or US-based sales activity. Once income is Effectively Connected, it is taxed at standard US income tax rates. The dividing line is the trade-or-business test, and it turns on facts rather than on where the customer sits. Selling digital services from abroad to US customers stays outside the test in most fact patterns; hiring US staff or holding US inventory pulls income inside it. Because the analysis is fact-specific and the stakes are a full income tax bill, cross-border cases warrant review by a US tax preparer before the return is filed.
When the LLC pays US-source interest, dividends, or royalties to a foreign owner, it must withhold 30 percent, or a lower treaty rate, and report on Form 1042-S. The withholding duty sits on the LLC as the paying agent. This is a strict-liability obligation. Penalties accrue for a failure to withhold regardless of whether the foreign owner ultimately owed the tax, so the LLC cannot rely on the owner to settle up later. A tax treaty between the US and the owner's country reduces the FDAP rate to 5 to 15 percent, but claiming the reduced rate requires a valid Form W-8BEN on file and, in many cases, an ITIN for the owner.
A non-resident owner needs an ITIN to file Form 1040-NR when the LLC has US-source Effectively Connected Income, and to claim a tax treaty benefit that reduces FDAP withholding. An owner with no US-source income needs no ITIN. The ITIN is obtained through Form W-7 filed with a certified copy of the passport. Anonymousllc.co handles the ITIN as a $299 service, which removes the certified-document and IRS-correspondence burden that trips up most foreign applicants. Pairing the ITIN with the EIN, which Anonymousllc.co obtains for $99, gives a non-resident owner both numbers needed to bank and to file.
A multi-member LLC defaults to partnership treatment and files Form 1065 with Schedule K-1s to each partner. When a non-resident partner has a share of Effectively Connected Income, the partnership must withhold on that share. The withholding runs through Forms 8804 and 8805, and the non-resident partner files Form 1040-NR to report the ECI share and reconcile the tax. A partnership therefore carries a heavier compliance load than a single-member disregarded entity, because it layers partnership withholding on top of the individual return. Non-resident owners who want the simplest structure keep the LLC single-member wherever the business permits it.
It depends on the state of formation and the source of the income. Wyoming and Nevada levy no state income tax, so a non-resident owner faces no state-level income liability there. New Mexico and Delaware tax state-sourced income only, so an LLC with no in-state activity owes no state income tax in those states either. Forming in a no-income-tax state removes state-level exposure for most non-residents whose income is not sourced to that state. State tax turns on nexus and sourcing, not on the owner's residency, which is why the state of formation is a deliberate choice rather than a default.
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