Almost every anxious question a non-resident founder asks about US tax reduces to one concept with an intimidating name. Strip the name away and the idea is straightforward: is the money you are earning connected to a business you are actually running inside the United States?
Answer that honestly and most of the confusion dissolves. What follows is the plain version, the facts that usually decide it, and the traps worth knowing about.
Why effectively connected income matters so much
The United States taxes non-residents differently from residents. A resident is taxed on worldwide income. A non-resident is taxed only on certain US-connected income, and the system splits that into two categories which are treated very differently.
The first is income effectively connected with a US trade or business. This is taxed on net profit at graduated rates, with deductions for expenses, and it requires a return.
The second is fixed or determinable annual or periodical income — a category covering things like dividends, certain interest and royalties. This is generally taxed at a flat rate on the gross amount, usually collected by withholding at source, with no deductions.
Everything else typically falls outside the US net altogether. Those three outcomes are dramatically different, which is why the classification carries so much weight.
Two questions, in order
The test is a sequence, and the order matters because the second question only arises if the first is answered yes.
First: are you carrying on a trade or business inside the United States? This asks whether there is regular, continuous and substantial business activity within US borders. An isolated transaction is generally not enough. Neither is passive ownership of something.
Second: if so, is this particular income connected to that business? A non-resident might run a genuine US business and also hold an unrelated investment. Only the income belonging to the business falls into the first category.
Most founders reading this stop at the first question, because for a company operated entirely from another country the answer is usually no.
The facts that actually carry weight
There is no statutory checklist that resolves every case, which is why the topic attracts so much confident nonsense online. There is, however, a clear hierarchy of what matters.
| Fact | Weight |
|---|---|
| Where the work is physically performed | Very high |
| Where employees or dependent agents are located | Very high |
| A fixed place of business, office or warehouse in the US | Very high |
| Inventory held and fulfilled from inside the US | High |
| Someone in the US able to conclude contracts for you | High |
| Where your customers are | Low |
| Where the company is registered | Very low |
| Where the bank account is | Very low |
| Where the website is hosted | Very low |
Read the top and bottom of that table together and the logic becomes obvious. The system is looking for the business, not for the paperwork. People, premises and where work happens are the substance. Registration, banking and hosting are administration that follows the business around.
This is why forming in a different state changes nothing about the analysis, and why founders who spend weeks agonising over Wyoming versus Delaware are optimising the variable that matters least.
Fact patterns that usually come out clearly
The consultant abroad
You live in Algiers. You write software for US clients, at your desk, alone. You invoice through a Wyoming LLC and receive payment into a US account.
All the work happens in Algeria. No US premises, no US staff, no US inventory. The customers are American and the money arrives in a US bank, but both sit at the bottom of the weight table. This ordinarily falls outside effectively connected income.
The founder who hires in the US
Same business, except you now employ a full-time developer in Texas who works for you exclusively and follows your direction.
That is a person performing the business's core activity inside the United States. This changes the analysis substantially and is the kind of fact that creates effectively connected income. It is also the single most common way a founder crosses the line without noticing, because hiring feels like an operational decision rather than a tax one.
Goods stored and shipped from the US
You sell physical products, held in a warehouse in the US, picked and shipped from there to buyers.
Inventory and fulfilment inside the country is a strong fact. Arrangements vary and fulfilment programmes have their own well-worn arguments in both directions, but anyone operating this model should take advice specific to their setup rather than relying on a general article. Do not assume the answer is comfortable.
Passive investment
You hold shares in US companies and receive dividends. You run no business there.
Passive holding is generally not a trade or business. The dividends usually fall into the flat-rate withholding category rather than the effectively connected one, and a treaty may reduce the rate.
The weak facts that cause the most worry
Three things generate more anxiety than they deserve, so it is worth addressing them directly.
A US bank account. Holding one is ordinarily incidental. You need somewhere to receive dollars; that is banking, not business activity. This is discussed further in does a US bank account create a US tax presence.
A US payment processor. Using a processor is a payment mechanism. It tells you where money is handled, not where work is done.
US hosting. Servers without people are generally treated as equipment rather than as a business presence. Almost every website in the world is hosted somewhere its owner does not live.
None of these is entirely without significance in every conceivable case. But each is far down the hierarchy, and none of them turns a business run from Casablanca into a US business.
Where treaties come in
If your country has a tax treaty with the United States, it may change the answer even where a US trade or business exists. Treaties commonly provide that business profits are taxable in the US only where there is a permanent establishment there — a defined term generally requiring a fixed place of business or a dependent agent with authority to conclude contracts.
The practical effect is that the treaty can set a higher bar than domestic law. A situation that looks like a US trade or business under the internal rules may still escape US tax because it falls short of a permanent establishment under the treaty.
Three caveats. Not every country has a treaty with the United States, and coverage varies enormously across North Africa, the Middle East and South Asia. Treaty benefits usually have to be claimed rather than applied automatically, with the appropriate certification given to whoever is paying you. And claiming a benefit you are not entitled to is worse than not claiming one. How this works in practice is set out in how tax treaties reduce US withholding.
Filing is a separate question
This is where founders most often go wrong, and it is worth stating bluntly: owing no tax does not mean filing nothing.
A foreign-owned single-member LLC generally has information reporting obligations triggered by transactions between the company and its owner, regardless of whether there is any income at all, let alone effectively connected income. The penalty for missing those filings is substantial and is not scaled to the amounts involved.
So the conclusion "my income is not effectively connected" answers the tax question and says nothing whatsoever about the filing question. Both need answering. The filing side is covered in the penalty most foreign LLC owners never see coming.
What changes the answer over time
The analysis is not a one-off. It follows the business, and businesses change. The events worth re-examining are these.
- Hiring anyone in the United States, whether as an employee or as a contractor who works only for you and takes your direction.
- Taking any physical space — an office, a desk you actually use, storage.
- Holding inventory in the country, however it is fulfilled.
- Giving someone authority to sign contracts on the company's behalf.
- Spending substantial time there yourself, working. Days present matter for more than one rule.
Each of these is a normal commercial decision that quietly moves a tax position. None of them announces itself. The habit worth building is to ask the question again whenever one of them happens, rather than once at formation and never after.
Three claims you will read online that are wrong
This topic attracts more confident misinformation than almost any other in the field, partly because the correct answer is boring and the wrong answers are memorable.
"Form in Wyoming and you pay no US tax." State of formation has essentially no bearing on the federal analysis. Wyoming has no state income tax, which is a real but separate point about state-level taxation. It says nothing about whether your income is effectively connected for federal purposes. A Wyoming LLC with a warehouse and staff in Ohio is in exactly the same federal position as a Delaware one.
"If you never enter the United States you can never owe US tax." Physical absence is a strong fact and it is not conclusive. A business with employees, an office and inventory in the US is carrying on activity there whether or not the owner ever boards a plane. The question is where the business operates, not where the owner sleeps.
"A disregarded entity means there is nothing to report." Disregarded status concerns how the entity is classified for income tax purposes. It does not remove information reporting, and the reporting obligations that attach to foreign-owned single-member LLCs exist precisely because the entity is disregarded. The phrase is routinely quoted as though it were a conclusion when it is a classification.
The common thread is that each claim takes a genuine technical point and stretches it into a general rule. When something you read promises certainty about a question that depends entirely on facts, that is the signal to check it against your own circumstances rather than adopt it.
How to use this
Write down, in one paragraph, where the work of your business is actually performed and by whom. Not where the company is registered, not where the money lands, not where your customers live. Where the people doing the work sit.
If that paragraph describes a country other than the United States, with nobody and nothing in the US doing the work, you are almost certainly in the ordinary position: no effectively connected income, and a filing obligation to attend to anyway. If your paragraph mentions anyone or anything inside the United States, that is the point at which a general article stops being useful and an accountant starts.
The broader picture of what non-resident owners owe is in do non-resident LLC owners owe US tax, and the sequence for setting the company up correctly is in opening a US LLC from outside the United States. If you would rather have the structure set up with these questions considered from the start, that is part of our formation service.
If you would rather have this handled for you, our US LLC formation service covers it end to end. For the official position, see IRS: effectively connected income.