Single-member or multi-member LLC: what changes for a foreign owner

It happens all the time. When the company is formed, the founder adds a spouse or a long-standing partner, out of habit and out of trust. Nobody tells them that this line changes the tax nature of the entity and doubles its filing duties.

An LLC has no tax regime of its own. It takes the one its number of members gives it, and the gap between one and two is considerable for a non-resident.

One member, a disregarded entity

With a single foreign owner, the company is treated as a *disregarded entity*. It pays no federal corporate tax and files Form 5472 each year together with a pro forma 1120, listing the transactions between the company and its owner.

The owner is identified by name, address and foreign tax number. No US personal number is needed, as we explain in our article on ITIN and EIN.

Two members, a partnership

From the second partner onward, the IRS treats the company as a *partnership*. It files a 1065 return and issues each partner a K-1 allocating their share of profit or loss. That is no longer paperwork, it is a full tax return, backed by books that support it.

Every foreign partner named on a K-1 needs a US tax number, therefore an ITIN, which takes weeks to obtain and requires a certified ID document. Two partners, two files.

Withholding, the least known trap

When a partnership earns income effectively connected with a US trade or business, it must withhold tax on the share attributable to its foreign partners and remit it to the IRS. That duty sits on the company, not on the partner, and forgetting it costs penalties.

Most activities run from abroad do not generate that kind of income, but the rule exists and becomes a real issue as soon as a team member works from the United States.

The spouse case, to be handled separately

In the United States, a married couple living in a community property state can sometimes treat their LLC as a disregarded entity despite having two members. That exception does not apply to non-resident spouses, whose marriage falls under foreign law.

Adding a spouse to give them legal security therefore produces the opposite of the intended effect: the company changes regime, annual costs rise, and the spouse falls within the scope of US filings.

Protecting a partner without changing regime

Three routes exist. An agreement between partners covering revenue, signed outside the company. A second company owned by the other person, invoicing its services. Or genuinely bringing them in as a member, with the costs understood, when the business truly justifies it.

The wrong move is to make someone a member to signal an intention, without them taking part in the business. The IRS looks at the declared structure, not at the intention.

How to decide

If one person runs the business and takes the pay, the single-member form is the right one, and it stays the easiest to maintain. If two people genuinely contribute work and share the result, the two-member form is legitimate, provided the annual return and the tax numbers are budgeted.

Moving from one to the other remains possible later, through a transfer of interests. Starting alone locks nobody in, whereas starting as two imposes the heavy regime immediately.

How LLC Place handles it

We form the company with the ownership structure you have chosen knowingly, and we set out what each option entails in terms of filings before you sign, not afterwards.

For a single-member company we take care of the EIN and the business address. The annual IRS filing is available as an option at €199 per year, or €398 per year with a dedicated tax expert, and is included in the Pro and Founder plans. For a multi-member company we point you to a US preparer for the 1065 return, because that return requires full books and is a professional’s job.

Frequently asked questions

Can I add a partner after formation?

Yes, through a transfer of interests and an update to the operating agreement. The company then changes tax regime from that date, which is prepared with the accountant.

Does a two-member LLC pay more tax?

Not necessarily, since the result stays allocated to the partners. What increases is the filing burden and its cost, in the United States as well as in your country of residence.

Does Form 5472 disappear with two members?

It is replaced by the 1065 return and its K-1s, which is heavier. Nothing is gained in simplicity, contrary to what is sometimes claimed.