Does a US LLC Owe US Tax If Its Owner Lives Abroad?

It is the first question most founders ask us, and it is usually asked in the hope of a simple yes or no. The honest answer is that residence is not the test at all. A founder in Bogotá, Madrid or Dubai who owns a Wyoming LLC is not taxed because of where they live, and is not exempt because of where they live either.

The IRS frames it around the activity rather than the person. Its guidance on effectively connected income is direct: "Generally, when a foreign person is engaged in a trade or business in the United States (USTB), all United States (U.S.) source income connected with the conduct of that trade or business is considered Effectively Connected Income (ECI)." The word doing the work in that sentence is engaged.

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01What Does the IRS Actually Test?

Whether the company is carrying on a trade or business inside the United States. The same guidance adds that "a foreign person generally must be engaged in a U.S. trade or business during the tax year to treat income received in that year as ECI, which is taxable in the U.S."

So the question is not about your passport or your address. It is about where the activity that produces the income takes place: where the work is performed, where people are engaged, where the operation physically sits.

02Does Forming in Wyoming or Delaware Change the Answer?

No. The state of formation determines your filing obligations to that state and the law your operating agreement sits under. It does not determine whether the federal government treats your income as effectively connected. A Wyoming LLC run entirely from Lisbon and a Delaware LLC run entirely from Lisbon are in the same federal position.

This surprises people who chose a state on the strength of its reputation. The choice is a real one, with real consequences, but it is not the lever that answers this question.

03What If the Work Is Done Entirely Outside the US?

Then the position is often, though not always, that there is no US trade or business and therefore no effectively connected income. The IRS offers the clearest counter-example itself: "If a foreign person owns and operates a business in the U.S. selling services, products, or merchandise, the foreign person is, with certain exceptions, engaged in a trade or business in the U.S."

Note the phrase with certain exceptions. This is a facts-and-circumstances area, not a rule you can apply from a summary. Dependent agents, US-based staff, inventory held in the United States and a physical place of business all pull in the direction of a US trade or business, and any one of them can change the answer.

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04What Still Has to Be Filed Even If Nothing Is Owed?

This is where the real exposure sits, because reporting and taxation are separate obligations. A foreign-owned single-member LLC has an information return to file whether or not it earned a dollar, and the penalty regime on Form 5472 is severe enough that it dwarfs most tax bills at this scale. Foreign financial accounts carry their own FBAR obligation on a separate track.

If you filed an extension this year, it is worth reading what actually falls due on October 15, because several of these run to the same date and an extension moved only one of them.

05Where Does This Leave a Founder Planning Ahead?

With a question worth answering deliberately rather than assuming. Most non-resident owners we work with are not in a US trade or business, and are still obliged to file. A smaller number believe they are outside the system entirely, and have quietly built the exact facts that put them inside it.

The distinction is knowable in advance. It is considerably cheaper to establish it before a return is due than to argue it afterwards.