How to Invest as an Expat in 2026: Brokerage Accounts, ETFs, and Tax Rules

Investing as an expat is less about picking the hottest ticker and more about a much less glamorous question: who will still custody your account once your registered address changes to another country. Brokerages, unlike most consumer apps, gate access on tax residency and citizenship, and a change of address can trigger anything from a polite request for updated paperwork to an outright account freeze. Getting this sequencing right before you move — rather than discovering the restrictions after your first international bank statement — saves a lot of stress.

Brokerage access by residency

Interactive Brokers is the broker most frequently recommended for people living a multi-country life, largely because it is available to clients across 200-plus countries and territories, more than almost any competitor. That reach does not mean every account type or product is available everywhere, though — margin rules, available exchanges, and even which funds you can buy can shift with your declared residency, so it is worth rereading your account agreement whenever you relocate rather than assuming continuity. Other platforms are considerably narrower. Trading 212, for instance, is commonly reported as not onboarding US citizens at all, regardless of where they currently live, which catches out a fair number of Americans who assume a European brokerage will simply work because they are physically in Europe. If you are a US citizen shopping for a broker abroad, confirm citizenship-based restrictions before you get attached to a platform's interface or fee structure.

UK nationals face a related but different problem: an ISA does not travel well. The tax-free wrapper that protects UK investors from capital gains and dividend tax inside an ISA is a UK tax-residency benefit, not a portable feature of the account itself. Once you cease UK tax residency, you generally cannot make new contributions to an ISA, and while existing holdings can often remain in the wrapper, the ongoing tax treatment depends heavily on your new country's rules and any double-taxation treaty in place. This is a conversation to have with a UK-qualified adviser before you leave, not something to sort out from abroad after the fact.

The PFIC trap that catches US citizens

The single most consequential rule for American expats is the US Passive Foreign Investment Company (PFIC) regime. Because the United States taxes citizens on worldwide income regardless of residence, a US person who buys a foreign-domiciled pooled investment fund — including the UCITS ETFs that are the default choice for almost every non-US retail investor — can trigger PFIC taxation. Under the default PFIC method, gains and certain distributions are taxed as ordinary income at the highest marginal rate, with an interest charge added for the years the investment was held, and in bad-fact scenarios the effective tax bite is often discussed as exceeding 37%. This is not a minor footnote: it is the reason nearly every serious guide for US expats tells them to avoid non-US mutual funds and ETFs entirely and instead hold US-domiciled funds through a US brokerage, or to get dedicated cross-border tax advice (an election like QEF or mark-to-market can sometimes soften the blow, but both require specific paperwork filed on time). If you are a US citizen and someone hands you a UCITS ETF ticker without asking about your tax status first, treat that as a red flag rather than a tip.

The UCITS ETFs everyone else uses

For non-US investors, UCITS-domiciled ETFs are the standard building block of an expat portfolio, largely because they are regulated across the EU, widely accessible through European and Asian brokers, and generally more tax-efficient for non-US residents than US-domiciled alternatives. iShares Core MSCI World (ticker IWDA) and Vanguard FTSE All-World (VWRA) are the two funds that come up constantly in expat investing forums and financial planning content, both offering broad, low-cost global equity exposure in an accumulating share class that reinvests dividends automatically — useful for investors in countries that do not want the administrative hassle of declaring foreign dividend income annually. Even so, "everyone uses it" is not the same as "it fits your tax situation." Always check the fund's Key Information Document against your country of residence's specific tax treatment of foreign ETF gains and distributions before buying.

Property, pensions, and the assets that don't move easily

Real estate and pensions are the two asset classes that tend to get forgotten in the rush to sort out a brokerage account, and they are also the two that are hardest to unwind quickly. Selling a home before or after a move has real timing costs — capital gains exemptions in many countries depend on how long you owned and lived in the property, and those clocks can reset or complicate themselves the moment you become a tax resident elsewhere. Employer-sponsored pensions, including a US 401(k), generally cannot simply be "moved" the way a brokerage account can; withdrawing early usually triggers penalties, and rolling it into a foreign equivalent is rarely straightforward or even possible. The practical approach is to treat property and pension decisions as a separate planning track from your liquid investment portfolio, ideally worked through with a cross-border adviser well before your departure date rather than in the weeks leading up to it. See the fuller tax residency guide for how residency timing interacts with these decisions.

What to check before you update your address

Before you click "update address" on any brokerage account, run through a short list: does the new residency trigger new tax reporting forms for you or the broker (such as a W-8BEN or a local equivalent)? Are any of your current fund holdings restricted or unavailable to residents of your new country? Could the account be frozen temporarily while the broker reviews the change? It is also worth keeping a slice of emergency cash outside the brokerage entirely during a move — a frozen or under-review account is not the moment you want to discover your only liquid funds are locked. Pair this planning with a broader look at tax residency, crypto-friendly hubs, and low-tax framing if optimizing your overall tax picture is part of the move.

Continue with these closely related guides:

How Australian Expats Handle Taxes Abroad in 2026: Foreign Income and Residency Rules — Overlapping theme (tax).
The Definitive Expat Relocation Timeline: 12 Months Before You Move Abroad in 2026 — Overlapping theme (tax).
How to File Taxes as a US Expat in 2026: FEIE, FTC, and Everything You Need to Know — Overlapping theme (tax).
How Buying Property in Portugal in 2026 Works: Process, Costs, and Golden Visa — Overlapping theme (tax).

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