My customers are American. Does that mean I owe US tax?

Not by itself. Customer location is not the test. What matters is where the business is actually conducted — where the work is performed, and whether you have US employees, premises or someone habitually concluding contracts on your behalf in the United States.

If I owe no US tax, do I still have to file anything?

Yes. A foreign-owned single-member LLC must file Form 5472 with a pro forma Form 1120 every year regardless of tax owed, with a penalty starting at $25,000 for failing to do so. Owing nothing and filing nothing are different positions.

Does a US LLC reduce my tax at home?

Usually not. Your country of residence may tax the profit of a company you control through controlled-foreign-company rules, place-of-effective-management tests, or simply by taxing distributions to you. A US entity is a payments and liability structure, not a tax plan.

Building a US business from outside the United States

Guide · 2 min read

Do non-residents owe US tax on a US LLC?

Filing and owing are different questions. Plenty of foreign-owned LLCs owe no US income tax and still have filings due — and the larger bill is often at home.

The short answer

Whether a non-resident owes US income tax on a US LLC depends on whether the income is effectively connected with a US trade or business. A founder working abroad with no US employees, office or dependent agent frequently has no US federal income tax liability, but must still file Form 5472 annually.

"What must I file?" and "what must I pay?" are different questions with different answers. Conflating them is expensive in both directions.

The test that decides it

For a foreign owner the question is whether income is effectively connected income — ECI — with a US trade or business. ECI is taxed at graduated US rates on net profit. Income that is not ECI frequently escapes US federal income tax entirely.

Tends to point toward ECI	Tends to point away
Work performed inside the United States	All work performed abroad
US employees or contractors acting for you	No US personnel
A US office or fixed place of business	No US premises
Someone in the US habitually concluding contracts	You sign everything yourself, abroad
Inventory held and sold from the US	Digital delivery from outside the US

Indicative factors, not a checklist. This is a facts-and-circumstances determination — get advice on your specific situation.

The half that usually costs more

What you file either way

Form 5472 with a pro forma Form 1120, annually, regardless of income. See Form 5472.
Form 1040-NR, if you personally have a US filing obligation — which is when an ITIN becomes genuinely necessary.
State filings wherever the company is registered, which are unrelated to federal income tax.

If a treaty exists between the US and your country, it may change withholding rates and the threshold at which business profits become taxable — see US business taxes.

Frequently asked questions

My customers are American. Does that mean I owe US tax?: Not by itself. Customer location is not the test. What matters is where the business is actually conducted — where the work is performed, and whether you have US employees, premises or someone habitually concluding contracts on your behalf in the United States.
If I owe no US tax, do I still have to file anything?: Yes. A foreign-owned single-member LLC must file Form 5472 with a pro forma Form 1120 every year regardless of tax owed, with a penalty starting at $25,000 for failing to do so. Owing nothing and filing nothing are different positions.
Does a US LLC reduce my tax at home?: Usually not. Your country of residence may tax the profit of a company you control through controlled-foreign-company rules, place-of-effective-management tests, or simply by taxing distributions to you. A US entity is a payments and liability structure, not a tax plan.

Sources

Last reviewed August 23, 2026. Verify against the primary source before acting.

Founders 8 does not provide tax advice. Tax residency depends on facts and rules specific to each jurisdiction — review your position with a qualified adviser.

More in Building a US business from outside the United States

All of Building a US business from outside the United States