If you’re an American living abroad — in Cape Town, London, Dubai or anywhere else — it’s worth saying something plainly at the outset: US persons are a genuinely special case, and much of the standard “offshore investing” advice aimed at expats does not apply to you, and can even work against you. That’s not a sales angle; it’s the honest starting point. This is a plain-English look at why American expats are more restricted than other nationalities, and what to understand before you invest a cent offshore.

The concept that changes everything: citizenship-based taxation

Nearly every country in the world taxes people based on where they live. The United States is one of the very few that taxes based on citizenship. In plain terms: citizenship-based taxation means that US citizens — and green-card holders — remain within the US tax system on their worldwide income no matter where in the world they live. Moving to South Africa or anywhere else does not end that relationship the way it might for a Briton or a South African. There are mechanisms designed to reduce being taxed twice on the same income, but the filing obligation itself doesn’t simply switch off. Because this concept sits underneath everything else, it’s the first thing a US person abroad should be clear about — ideally with a US-qualified cross-border tax adviser.

FATCA and FBAR: your foreign accounts are reportable

Two acronyms come up constantly for American expats, and they’re worth naming plainly. FBAR is the reporting of foreign financial accounts by US persons to the US authorities. FATCA is the regime under which foreign financial institutions report information about accounts held by US persons back to the US. The practical upshot is simple to state: if you’re a US person, your accounts outside the United States are generally reportable, and in many cases your foreign bank is already reporting them. This is a large part of why some banks and providers abroad are reluctant to take on American clients at all — the reporting burden falls on them too. None of this is a reason for alarm; it is a reason to keep your affairs transparent and properly documented, and to confirm what applies to you with someone qualified.

The PFIC problem: why “offshore products” can be actively unsuitable

This is the single most important section for an American expat, and the one most often glossed over by people selling offshore products. Most pooled investments domiciled outside the United States — the ordinary offshore funds and unit trusts routinely marketed to expats — are treated by the US as PFICs, or passive foreign investment companies. The US rules for holding a PFIC are punitive and administratively heavy for a US person, both in how the gains are taxed and in the reporting required. The honest consequence is this: the very products that are pitched to expats as the obvious offshore solution are often actively unsuitable for Americans, even where they’re perfectly sensible for a British or South African investor. If someone offers you a standard offshore fund without ever mentioning PFIC treatment, that tells you something about whether they understand US persons at all.

Why US persons need US-qualified, cross-border advice

Put the pieces together — citizenship-based taxation, FATCA and FBAR reporting, and PFIC treatment — and it becomes clear why this is a specialist area rather than a general one. The plain truth is that many advisers, and most off-the-shelf offshore products, simply aren’t set up to serve US persons properly. That’s not a criticism of them; it’s a structural reality of how the US treats its citizens abroad. What American expats generally need is US-qualified, cross-border-specialist advice — someone who works with the US system rather than around it. It’s entirely fair, and sensible, to ask any adviser directly whether they are equipped to help a US person compliantly, and to keep looking if the answer is vague.

Currency and diversification still matter — the structure just has to be compliant

None of this means the ordinary reasons to invest across borders disappear. If you earn, spend or plan to retire in a currency other than the dollar, holding everything in one currency concentrates a risk you may not have chosen deliberately, and spreading investments across markets remains as sensible for an American as for anyone else. The difference is only in how it’s built. For a US person, the goal is the same diversification others enjoy, achieved through structures that are US-compliant rather than through the standard offshore products that trigger PFIC and reporting problems. The principle doesn’t change; the plumbing does.

What to check before you invest as a US person

The discipline here is the same you’d apply to any investment, with several cross-border specifics that matter enormously for Americans:

If you want the groundwork first, it’s worth reading what “offshore” actually means, and you can see how this practice approaches offshore investing more generally too.

Frequently asked questions

Do American citizens pay US tax while living abroad?

Generally yes. The United States taxes its citizens and green-card holders on their worldwide income wherever they live — a system known as citizenship-based taxation. Living and paying tax in another country does not switch off the US filing obligation, though mechanisms exist to reduce double taxation. It’s a matter for a US-qualified cross-border tax adviser.

What are FATCA and FBAR, and do they apply to me?

FATCA and FBAR are US reporting regimes covering foreign financial accounts held by US persons. In practice they mean your accounts outside the US are reportable to the US authorities, and many foreign banks report account information about US persons directly. If you’re a US person living abroad, they’re very likely to be relevant, and worth confirming with a US-qualified tax adviser.

Why are offshore funds a problem for US persons?

Most non-US pooled and offshore funds are treated as PFICs — passive foreign investment companies — under US rules, which are punitive and complex for US persons to hold and report. This is why many standard offshore products marketed to expats can be actively unsuitable for Americans, even when they suit others. The structure has to be checked against PFIC rules before you invest.

Can any adviser help an American expat invest?

Not really — this is a specialist area. Many advisers and many off-the-shelf offshore products are simply not set up to serve US persons compliantly, because of PFIC treatment and US reporting rules. What US persons abroad generally need is US-qualified, cross-border-specialist advice, and it’s fair to ask any adviser directly whether they’re equipped to help.

Offshore guides for other nationalities

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This article is for general information only and does not constitute financial or tax advice. US citizenship-based taxation, FATCA and FBAR reporting, and PFIC treatment depend entirely on your personal circumstances — confirm your position with a US-qualified cross-border tax adviser before acting.