Who is a US Person for Tax Reasons?

This is the story of an Australian man named Tom who accidentally became a US person. 

Tom’s story is a cautionary tale that attests to the complex and difficult nature of the US tax system. 

If you’re a US citizen, you’re stuck with citizenship-based taxation that puts you at a disadvantage in the global tax system. 

Tom was a ship captain, and when he started travelling at sea, he did his best to get out of the Australian tax net as quickly as he could. 

However, that was easier said than done. 

Since he wasn’t technically a resident of anywhere due to his job, he had a difficult time getting classified as a tax non-resident. Eventually, though, he was able to break free. 

Unfortunately for Tom, a few years later he had to spend a substantial amount of time in the US, and as a consequence, he inadvertently became a US person for tax purposes.

Even if you haven’t set foot in the country for years, you’ll need to file taxes every year by virtue of being a citizen. 

However, there are plenty of ways that you can be a US person even if you go offshore – or if you aren’t even a citizen. 

As Tom can attest, your business, your trust, and many of your other financial activities could land you in the US tax system. 

This article will help you better your understanding of the US tax system by explaining:

• What a US person for tax purposes is
• How you can become a US person for tax reasons
• The tax consequences of being a US person
• How to undo your US person status.

What is a US Person for Tax Purposes?

At its most basic, a US person is a person or entity that is taxable by the Internal Revenue Service (IRS).

According to the IRS, taxable persons include US citizens, green card holders and residents. Taxable entities include domestic partnerships, domestic corporations, estates and trusts under US jurisdiction.

While this seems fairly straightforward, there are still a lot of misconceptions about who and what can be considered a US person. 

The most common one is that non-US citizens can’t be US persons. Regardless of your citizenship status, you can still fall into the US tax net under the substantial presence test if you spend enough time in the US. 

There are also plenty of tax myths about renouncing US citizenship. Some people think that renouncing doesn’t allow you to escape the US tax net, while others believe that renunciation means you’ll never have to contend with the IRS again under any circumstances. 

Some people are concerned about an old rule that forbids renunciants from shedding their US personhood for ten years after giving up their citizenship. 

After a high-profile renunciation in the 1990s, the IRS imposed a rule that required anyone who renounced to stay in the US tax system for ten more years. 

However, that’s no longer the case. 

Instead, the IRS now uses an exit tax that only applies to expats who earn over a certain amount of money per year, have a net worth over US$2 million or have not been tax-compliant for the past five years. 

On the other hand, there are plenty of people who think that renouncing means they don’t need to worry about the IRS. 

While you can feasibly never pay US tax again after renouncing, there are ways that you can end up back in the US tax net. 

If you have any assets in the US, such as real estate or investments, you will still need to pay US tax in most cases, and you can still become a US person through the substantial presence test.

How You Become a US Person

Under the US system of citizenship-based taxation, all US citizens are considered US persons for tax reasons regardless of whether they actually live in the country. 

However, there are plenty of ways that you can be a US person without holding a US passport.

Hold a Green Card

The green card test is one of a handful of tests the IRS uses to determine whether or not a foreign citizen is a US person. 

Under this test, any non-US citizen who is a Lawful Permanent Resident – commonly known as a green card holder – must pay US taxes.

Qualify Under the Substantial Presence Test

The substantial presence test is somewhat similar to other residency tests in that if you spend more than 183 days in the US, you will need to pay tax. 

However, there’s a unique formula to determine the total number of days that you have been in the US.

Instead of only counting days during the current year, the substantial presence test also includes 1/3 of the days you spent in the US during the previous year and 1/6 of the days that you spent two years ago. 

To see how this works, let’s use an example. Suppose Max, a Canadian citizen, has a brother who moved to New York in 2023. 

During 2023, he visited his brother frequently, and he spent a total of 150 days in the US. He had only spent six days there in 2022 and none in 2021, so he did not meet the 183-day threshold. 

In 2024, Max spends another 150 days in the US. However, this year, he has 51 days counting against him from previous years, so he becomes a US person under the substantial presence test and must pay US taxes. 

While a handful of exceptions exist for groups like students, the substantial presence test applies to the majority of non-US citizens who visit the US. 

You can learn more about the substantial presence test here.

Corporations and Trusts

Certain corporations and trusts can also be considered US persons. If you are a US person, keep in mind that, in some cases, your US person status can extend to your trust or corporation. 

However, under other circumstances, the IRS can still tax your corporation or trust even if you are not a US person. 

Since a number of factors can influence whether your corporation or trust is considered a US entity, you should generally seek professional advice to determine whether your business qualifies as one.

What are the Tax Consequences of Being a US Person?

If you’re a US person, you need to meet all US tax requirements for individuals or corporations. Individuals need to file taxes and pay what they owe to the IRS. 

If you’re living and working outside of the US, you can qualify for the Foreign Earned Income Exclusion, which allows you to exclude over US$130,000 of your active income in 2025. However, this exclusion only applies to active income, such as a salary. 

That salary can come from a business that you control since you can be both an owner and salaried employee under US tax law. 

It does not apply to passive income from sources like stock trading and capital gains – unless there’s a possibility that you earn passive income over the normal course of your business. 

If your business buys and sells real estate, for example, then your real estate earnings could be considered active income as a part of your business. 

If you wish to exclude passive income as a part of your business, you will likely need a professional consultation and some planning to successfully do so. 

Corporations, trusts and other entities will also need to file and pay taxes, but filing requirements will vary depending on the type of entity and the nature of the business. 

Additionally, both individuals and entities who own, have signature authority over or have a beneficial interest in a foreign bank account worth US$10,000 or more must file  Foreign Bank Account Reports (FBAR). 

If you’re ever unsure of your US tax obligations, you should consult a tax professional. This is the IRS we’re talking about, so even honest mistakes can result in audits and fines.

How Do I Undo My US Person Status?

If you’re currently a US person for tax purposes, there are ways to undo that status. 

However, the process of undoing ‘US person status’ depends on how you qualify as a US person, and it can be complicated depending on your situation.

US Citizens

US citizens must renounce their citizenship to no longer qualify as US persons. 

If you’re considering renouncing to lower your taxes, make sure you weigh up the tax consequences of renunciation before you beeline for the nearest embassy. 

To get alternative citizenship, you may need to pay for citizenship by investment, and you also need to pay a fee of US$2,350 to renounce. 

Additionally, you can be subject to an exit tax if you have a high net worth, a large income or have not been fully compliant with the IRS. We explore all this in our article on the Tax Consequences of Renouncing US Citizenship. 

US Green Card Holders

Similarly, US Green Card holders looking to undo their US person status will need to relinquish their Green Card. 

To do this, you’ll need to use Form I-407 to formally abandon your status as a Lawful Permanent Resident. 

The financial consequences of renouncing your Green Card will depend on how long you’ve had it. 

If you’ve been a long-term Green Card holder for eight of the last 15 years, you may be subject to the same exit tax requirements as US citizens who renounce.

US Persons Under the Substantial Presence Test

If you were deemed a US person under the substantial presence test, you’ll need to reduce the number of days that you spend in the US to no longer be a US person. 

Suppose you spent 120 days in the US in 2022, 120 days in 2023 and 2024. Then, you will have triggered the substantial presence test by spending 150 days there. 

If you wanted to, you’d then need to consider how many days roll over from 2023 and 2024 and limit your time accordingly. 

In this case, you would have 20 days counting against you from 2023 and 50 days from 2024, so you would have to limit your time in the US to 110 days in 2025 to undo your US person status. 

Undoing your US person status in this case is relatively simple, but it does require some travel planning – especially if you have business or personal interests in the US.

Corporations and Trusts

If you have a business entity that is considered a US person, there are ways to undo that status as well. However, the process for doing so is often complex and will depend on your personal situation. 

Issues like your US person status and your current tax structure can influence how you can legally remove that entity from the US tax net. 

Who is a US Person for Tax Purposes: FAQs

Undoing Your US Person Status

As the story of our Australian ship captain, Tom, highlights, becoming a  US person for tax purposes, even if inadvertently, means getting caught up in the complexities of the US tax system, which famously imposes citizenship-based taxation. 

While many believe that renouncing allows complete escape from the US tax net, individuals can still incur tax obligations based on US assets or substantial presence.

If you want to undo US person status, then you should seek professional advice in order to do so legally and efficiently.

That’s where Nomad Capitalist comes in. 

We help wealthy investors and entrepreneurs ‘to ‘go where you’re treated best’, whether that’s by moving assets offshore or relocating to a more tax-friendly nation.