US-source income

Income sourced to the US under IRS source-of-income rules, potentially subject to US withholding.

Definition

US-source income is income sourced to the US under IRS rules. Sourcing depends on income type: service income sourced to location of performance; royalty income sourced to location of use; interest sourced to debtor's residence. US-source FDAP income to non-residents is subject to 30% default withholding (or treaty rate).

Context

Source rules drive both withholding (US-source FDAP) and ECI analysis (US-source ECI is taxed at graduated rates).

Example

AdSense payments from Google (US payer) to a non-resident-owned LLC are typically US-source royalty income, subject to 30% default withholding or treaty rate via W-8BEN-E.

Common pitfalls

Misunderstanding source rules can lead to over- or under-withholding.
Some income types have specific source rules (transportation, communications, software).

Why source matters before residency does

For a non-resident founder who owns a Delaware LLC, the first question the US tax system asks is not how much you earned but where that income came from. Source is the gatekeeper. A person who is not a US tax resident is generally taxed by the United States only on income that the source rules assign to the US, plus income that is treated as connected to a US trade or business. Everything the sourcing rules push outside the US usually sits beyond the reach of US income tax for that person. This is the structural reason a foreign founder can sometimes earn meaningful amounts through a US LLC and still owe little or no US federal income tax, while another founder with very similar revenue owes a great deal. The difference is rarely the dollar amount. It is the source and character of each dollar.

This ordering also explains why source analysis comes early in planning, not as a year-end cleanup task. Once you know how each revenue stream is sourced, you can predict whether a US payer will be expected to withhold, whether a treaty might lower that withholding, and whether the income could instead be swept into the effectively connected income bucket that is taxed at graduated rates. Getting the order right keeps the later steps coherent.

Because source is determined by category, two businesses that look identical on a bank statement can have completely different US tax pictures. A consultant performing work from abroad and a software licensor collecting royalties from a US platform both receive wire transfers from American customers, yet the sourcing logic that applies to each is different and the downstream consequences diverge.

How the source rules actually decide things

The glossary entry lays out the core logic: service income is sourced to where the service is performed, royalty income is sourced to where the underlying property is used, and interest is sourced to the residence of the debtor. These are not arbitrary. Each rule tries to locate the economic activity that generated the income. When you perform consulting work at your desk in another country, the service happens there, so the income is foreign-source even if the client is American and pays in US dollars. When someone in the United States uses a trademark, patent, or copyrighted work you license to them, the use happens in the US, so the royalty is US-source.

The debtor-residence rule for interest works the same way. If a US company borrows from your LLC and pays interest, the interest is US-source because the borrower sits in the US. If a foreign borrower pays your LLC interest, that interest is generally foreign-source. The rule follows the location of the party whose obligation produced the payment.

Knowing which category a payment falls into is therefore the whole game. The same wire can be a service fee, a royalty, or interest depending on the contract behind it, and the label in your invoicing software does not control the analysis. The substance of what the customer paid for does. This is why founders are encouraged to write contracts that describe clearly what is being sold, since vague language can leave the character of the income open to a less favorable reading.

Service income for the founder who works from abroad

The most common pattern for a single-member foreign-owned Delaware LLC is a founder who personally performs services from outside the United States. Think of a developer, designer, marketer, or consultant who has no office, employees, or agents inside the US and who never travels there to do the work. Under the place-of-performance rule referenced in the glossary, that service income is foreign-source. Foreign-source service income earned by a non-resident is generally outside the US income tax net, which is the core reason this structure is popular with location-independent founders.

The LLC itself does not change that result for a single owner. A US LLC with one member is, by default, a disregarded entity for US federal tax purposes, meaning the IRS looks through it to the owner. So the question becomes where the owner performed the services, not where the LLC was formed. A Delaware certificate of formation does not move the place of performance to Delaware. The work still happens wherever the founder physically sits.

This is also where good records matter. If the founder later spends time in the US doing the work, some portion of the service income can shift to US-source based on where the days were worked. Keeping a clear log of where work was performed, and structuring contracts around deliverables rather than US-based presence, helps keep the foreign-source characterization defensible. None of this is a guarantee, and a founder with complicated travel patterns should review the specifics with a qualified advisor.

When platform payments become US-source royalties

The glossary example is the sharpest illustration of how source can surprise a founder. AdSense payments from Google to a non-resident-owned LLC are typically treated as US-source royalty income, because the payment is for the use of content and rights in a way the rules source to the US. That royalty character triggers the default 30% withholding on US-source FDAP income described in the entry, unless a tax treaty lowers the rate through a properly filed Form W-8BEN-E.

This catches many founders off guard because the activity feels like a service. From the founder's side it looks like work: making videos, writing articles, building an audience. But the payer is treating the money as a royalty for the use of intellectual property, and the source rules follow the use of that property rather than the effort behind it. The result is a 30% haircut at the source unless treaty relief applies. Founders from countries with a US income tax treaty can often reduce that royalty rate substantially, and sometimes to zero, by certifying treaty eligibility on the W-8BEN-E.

The practical lesson is to identify, for every platform you earn from, whether that platform classifies your payments as royalties, service fees, or something else. App store revenue, stock media licensing, ad networks, and affiliate programs do not all treat their payouts the same way. Reading the platform's tax documentation and the box it asks you to complete tells you a great deal about how your income will be sourced and taxed before any money moves.

FDAP withholding versus effectively connected income

The context note in the glossary entry points to the two separate tracks that source rules feed: FDAP withholding and effectively connected income, or ECI. These are not the same and they are taxed very differently. US-source FDAP income, which covers fixed or determinable annual or periodical income like the royalties, interest, and dividends above, is generally subject to a flat 30% withholding at the source, collected by the payer, unless a treaty reduces it. There are usually no deductions against FDAP income. The 30% applies to the gross amount.

Effectively connected income is income connected to a US trade or business, and it is taxed on a net basis at the graduated rates that apply to US persons. ECI lets you deduct expenses, but it also requires filing a US income tax return and generally signals a deeper US tax footprint. US-source income can be ECI, and even some foreign-source income can be ECI in narrow cases, which is why the source analysis and the trade-or-business analysis run side by side.

For most single-member foreign-owned LLCs whose owner works abroad with no US dependent agents, office, or inventory, the goal is usually to avoid having a US trade or business at all, which keeps income out of the ECI track. When that is achieved, the only US income tax exposure tends to be FDAP withholding on whatever US-source passive income exists. Whether a given founder actually has a US trade or business is a facts-and-circumstances question that deserves professional review, not a self-diagnosis.

The single-member disregarded entity and the look-through

A single-member LLC owned by a non-resident is, by default, disregarded for US federal income tax. That word has a precise effect on source analysis. Because the entity is disregarded, the income is treated as earned directly by the foreign owner, and the source rules are applied to the owner's activities. The Delaware filing creates a legal entity for liability and banking purposes, but it does not create a separate taxpayer that re-sources the income to the US.

This look-through is why founders cannot assume that forming a US LLC automatically makes their income US-source or US-taxable. The opposite confusion is also common: some founders assume the LLC shields all income from US reporting. Neither extreme is right. The source rules look through to where the owner performs work or where licensed property is used, and the reporting obligations attach regardless of how the income is ultimately taxed.

The disregarded status is also what makes the Form 5472 reporting regime apply, which is covered later. The IRS gave up the income tax on much foreign-source activity but kept an information-reporting hook so it can see the transactions between the foreign owner and the US entity. Understanding that trade is central to running this structure correctly. A founder who wants the entity treated differently, for example taxed as a corporation, would change both the source look-through and the filing obligations, so that election should not be made casually.

A worked example: the foreign consultant

Consider a marketing consultant living in Portugal who forms a Delaware LLC, opens a US business account, and invoices American clients $200,000 over a year for strategy work she performs entirely from her home office. She never travels to the US for the work and has no US employees or agents. Under the place-of-performance rule, the service income is foreign-source. As a non-resident earning foreign-source service income with no US trade or business, her US federal income tax on that revenue is generally nil. Her clients are not expected to withhold on service fees paid to her LLC in this situation, though they may ask her to provide a Form W-8BEN-E to document why.

Her US obligations here are mostly informational rather than tax-paying. The disregarded LLC must file Form 5472 with a pro forma 1120 to report the reportable transactions between her and the entity, such as capital she contributed and amounts she withdrew. The Delaware side has its own recurring costs: the $300 flat annual franchise tax due June 1 and the registered agent fee. Her home country may tax the income under its own rules, which is a separate matter from US sourcing.

Now change one fact. Suppose she spends 60 working days physically in the US delivering the same engagements. A portion of the service income corresponding to those US workdays can become US-source, and the broader presence may raise the question of whether she has a US trade or business. The single fact of where she sat while working reshapes the entire analysis, which is the recurring theme of source planning.

A worked example: the content creator and the platform

Take a second founder, a video creator in Brazil, who forms the same kind of Delaware LLC and earns $80,000 a year from a US ad platform that classifies the payouts as royalties. Following the glossary example, those payments are US-source royalty income subject to 30% default withholding. Without treaty relief the platform would withhold $24,000 before the money reaches his account. The character of the income, royalty rather than service, is what pulls it into the US net even though he never sets foot in the US.

Because there is a US income tax treaty between Brazil and the United States in many royalty scenarios, he reviews whether a reduced rate applies and certifies eligibility on Form W-8BEN-E, which he gives to the platform before payouts begin. If a lower treaty rate applies to his category of royalty, the withholding drops accordingly, and the certification is what unlocks it. Filing the form late means the platform defaults to the full 30% until the paperwork is in order.

His structural costs mirror the consultant's: the same $300 franchise tax due June 1, the same Form 5472 plus pro forma 1120 obligation as a foreign-owned disregarded LLC, and a registered agent. The lesson across both examples is that two founders with the same entity, same bank, and same single-owner structure can face very different US withholding outcomes purely because one earns foreign-source service fees and the other earns US-source royalties.

How source connects to your formation steps

Source analysis is not separate from the nuts and bolts of standing up the company. The chain starts at formation: a Delaware Certificate of Formation costs $110 to file, and that filing creates the legal entity that will sit between you and your customers. The entity does not change your source results on its own, but it does create the reporting obligations that source and structure trigger, so the formation step and the tax analysis belong in the same plan.

After formation comes the EIN, the federal employer identification number you obtain by filing Form SS-4. For a non-resident without a US Social Security number this is generally a free filing that takes roughly 8 to 10 business days through the appropriate channel. The EIN is what lets you open business banking and what payers and platforms reference on the tax forms that drive withholding. You cannot meaningfully manage source-based withholding without it, because the W-8BEN-E and the platform onboarding forms expect it.

Pricing-wise, founders often use a formation package, and the $297 one-time pricing on this service bundles the formation steps so the legal entity, EIN handling, and supporting paperwork move together. The point is sequencing: form the entity, get the EIN, document your status on the right tax forms, and only then does the source character of each revenue stream translate cleanly into the correct withholding and reporting outcome.

How source connects to banking and payment flows

Banking is where source analysis meets daily reality, because the account you open is where withheld and net amounts actually land. Non-resident founders commonly use Mercury, Wise, Relay, Lili, or Payoneer to receive customer and platform payments into the LLC. None of these providers change the source of your income, but each becomes a record of the flows that source rules and Form 5472 care about, so keeping clean, separate business banking matters for both reasons.

When a US platform treats your payouts as US-source royalties and withholds 30%, the amount that arrives in your Mercury or Wise account is already net of that withholding unless treaty relief was applied first. That is why founders are encouraged to complete the platform's W-8BEN-E before the first payout rather than after. Money that arrives after correct treaty certification reflects the reduced rate, whereas money that arrives before the paperwork is processed reflects the full default rate, and recovering over-withheld amounts later is more work.

Separating personal and business funds through one of these accounts also supports the disregarded-entity reporting. Form 5472 reports transactions between the foreign owner and the LLC, including contributions and distributions, and a dedicated business account makes those transfers easy to identify and document. Mixing funds blurs exactly the transactions the IRS wants to see, which raises the practical risk around the reporting regime discussed next.

Form 5472, the pro forma 1120, and the reporting hook

Even when source rules push most of your income outside the US tax net, the reporting obligation usually remains. A foreign-owned single-member US LLC that is disregarded must file Form 5472 together with a pro forma Form 1120 each year to report its reportable transactions with the foreign owner and other related parties. This is an information return, not an income tax return on the foreign-source profit, but the IRS treats it as serious. The penalty for failing to file Form 5472 on time is $25,000, and that penalty can apply regardless of whether any US income tax was actually due on the underlying income.

This is the trade at the heart of the structure. The source rules may relieve you of income tax on foreign-source service income, but they do not relieve you of the duty to show the IRS the transactions between you and your US entity. Capital you put in, money you take out, and dealings between the LLC and related companies are the kinds of items the form is built to capture. Because the entity is disregarded, this filing exists specifically to give the IRS visibility it would otherwise lose.

The practical takeaway is to treat the 5472 deadline with the same seriousness as a payment deadline, since the cost of missing it is fixed and steep rather than proportional to income. Many founders coordinate this filing with a US tax professional familiar with foreign-owned disregarded entities, because the pro forma 1120 has to be assembled correctly even though it reports little in the way of taxable income for a purely foreign-source operation.

Related terms that surround source analysis

The glossary links US-source income to FDAP income, Form W-8BEN-E, and tax treaties, and those connections are not decorative. FDAP income is the specific category of passive US-source income, like royalties and interest, that carries the 30% default withholding. Understanding FDAP is how you predict whether a US payer will hold back tax before paying your LLC. Source determines whether income is US-source in the first place, and the FDAP rules then determine the withholding mechanics for the passive slice of that US-source income.

Form W-8BEN-E is the document a foreign entity gives a US payer to certify its foreign status and to claim treaty benefits that reduce withholding. It is the lever that turns a treaty's lower rate into an actual reduction at the source. Without the form, the payer typically defaults to 30% on US-source FDAP. The tax treaty itself is the underlying agreement between your country and the US that sets which reduced rates you may claim, and treaties differ by country and by income category, so the rate available for royalties may differ from the rate for interest or dividends.

The substantial presence test, also linked in the glossary, sits one level up. It decides whether you are a non-resident at all, because if you become a US tax resident you are generally taxed on worldwide income and the source-only framework no longer protects your foreign earnings. Source rules matter most precisely when you remain a non-resident, which is why founders watch their US day counts so carefully.

Edge cases the basic rules do not cover cleanly

The glossary flags that several income types have their own special source rules, naming transportation, communications, and software. These categories exist because the general place-of-performance or place-of-use logic does not map neatly onto them. Software in particular can be characterized in more than one way depending on the transaction. A sale of a copyrighted article, a license that produces royalties, the provision of a service, and the sale of a copyright right are treated differently, and the same software business can generate more than one character of income at once.

Mixed contracts are another edge case. A single agreement might bundle a license to use intellectual property, ongoing support services, and a one-time setup fee. Each component can be sourced and characterized separately, which means one contract can produce both US-source royalty income and foreign-source service income. Splitting the contract value sensibly, and documenting that split, is how founders keep each piece in its correct bucket rather than letting an examiner assign the whole amount to the less favorable category.

Personal property sales, certain inventory transactions, and income with a US connection through an agent also have rules that depart from the simple framework. The common thread is that these edge cases reward specificity. The more clearly a contract describes what is being sold and where it is used or performed, the easier it is to apply the right source rule. Founders with these patterns benefit from professional review rather than relying on the headline rules alone.

Common misunderstandings to retire

The first misunderstanding is that a US LLC automatically makes income US-source. It does not. As the disregarded-entity look-through shows, the source of a single member's income follows the owner's activities and the use of the licensed property, not the state of formation. Forming in Delaware does not relocate where you perform your work. The second misunderstanding is the mirror image: that a foreign owner with a US LLC has nothing to report to the IRS. The Form 5472 obligation, with its $25,000 penalty for late filing, exists precisely to keep that visibility, so foreign-source income that escapes tax still usually requires reporting.

A third misunderstanding is conflating where the customer is with where the income is sourced. American customers paying US dollars into a US account does not, by itself, make service income US-source. Service income follows performance. A founder working from abroad for US clients can still have foreign-source service income. The customer's location matters for some categories, like interest tied to the debtor's residence, but it is not a universal rule.

A fourth is assuming withholding is the final word. A 30% withholding on a US-source royalty is a default, not a destiny. Treaty relief claimed on Form W-8BEN-E can reduce it, and where the form is filed before payouts begin, the reduction applies at the source. Treating these rules as fixed traps rather than as a system you can plan within is the misconception that costs founders the most. None of this is legal or tax advice, and a founder's particular facts should be checked with a qualified US tax professional before acting.

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