US LLC for Australians: What It Does, and the Tax Catch

A US LLC for Australians is two questions, not one, and almost every guide answers only the easy half. The US side is well documented and cheap. The Australian side is contested between tax practitioners, and that is the half that decides whether the structure helps you or costs you.

US LLC for Australians: what the US side actually requires

This part is not controversial. A single-member LLC owned by a non-resident is, by default, disregarded for US federal income tax, and the obligations attach to filings rather than to tax:

• EIN. The business tax ID, obtained from the IRS on Form SS-4. A non-resident without an SSN cannot use the online route and applies by fax or mail.
• ITIN, if you need one personally. A US taxpayer number for people not eligible for a Social Security Number. It does not require a visa.
• Form 5472 with a pro-forma 1120. A foreign-owned single-member LLC files this annually even with zero income and zero activity. The penalty for not filing starts at USD 25,000.
• A registered agent and a state filing in whichever state you form in, renewed annually.

None of that is hard. All of it is non-negotiable, and the 5472 penalty is the one that catches dormant companies people forgot they owned.

The Australian side, which is the actual question

Here is where we are going to be less decisive than the sites selling you the company, because the honest answer is that it depends on facts and the practitioners disagree.

Australia taxes residents on worldwide income. Two regimes can reach a US LLC owned from Australia, and which one applies turns on classification and on where the company is actually run:

• Division 830, foreign hybrid rules. Practitioners point to this as the route by which a US LLC that is not an Australian resident is treated as a foreign hybrid company, which changes how its income reaches you.
• The controlled foreign company rules. The ATO's own guidance describes the CFC provisions as applying to Australian residents with a substantial interest in a foreign company controlled by Australians, attributing a share of income back to the resident.

The hinge in both is residency, and residency is a question of fact. If the company is managed and controlled from Australia, you have an Australian-resident company wearing a US hat, and the structure stops doing what the brochure said. Running it from a laptop in Sydney is exactly that fact pattern.

The ATO's ruling practitioners keep pointing at is TR 2018/5, on the central management and control test of residency. We have not read it in full and we are not going to summarise a ruling we have not read.

What we will not tell you

Several commercial sites state flatly that a US LLC is treated as a partnership for Australian purposes, and several others state flatly that the ATO does not recognise it as a pass-through and you should use a C-corporation instead. Those cannot both be right.

We are not picking a side, because the answer depends on your facts and because getting it wrong is an amended return and a penalty, not a bad blog post. This is the one part of a US setup where an Australian registered tax agent is not optional, and it is worth paying for the hour before you form anything.

When a US LLC for Australians is still clearly worth it

Strip out the tax argument and there are reasons that stand on their own:

If most of your revenue is from US customers, those four are usually the real reason to do it, and the tax question is a cost to manage rather than the benefit.

Where the Amex question fits

Australians often arrive at the LLC question from the card side, especially since the Reserve Bank cut the domestic consumer credit interchange cap from 0.8% to 0.3% on 1 October 2026 and Australian rewards began tightening.

Worth being precise: that reform hit Visa and Mastercard, not Amex. Amex is not among the designated networks for the surcharging change, and the RBA kept the commercial card cap at 0.8% to support "a more even playing field between Mastercard, Visa and American Express".

If the goal is a US Amex specifically, Amex's own Global Card Relationship programme lists Australia and lets your existing Amex history inform a US application, including keeping your original Member Since date. It also requires you to apply using an address in the country you are moving to, which is where the US setup comes back in.

The order that works

Talk to an Australian tax agent first, because that conversation can change the whole plan. Then the US entity, EIN, and ITIN if you need one. Then the US business bank account. Then, if it still matters, the card.

Founders Credit does the US half of that as one piece of work. We do not give Australian tax advice and we will say so on the first call rather than guess at Division 830 for you.