You do not need to be a US citizen or resident to invest through a US broker. Several major firms accept non-resident aliens, and opening an account is usually straightforward. What is not straightforward — and what determines whether a US brokerage account is a sensible idea for you at all — is the tax treatment that comes with it.
This guide covers who accepts non-residents, what you will be asked for, and the three tax questions that matter more than any comparison of trading fees.
First: are you a non-resident alien?
For US tax purposes you are generally a non-resident alien (NRA) if you are not a US citizen, not a green card holder, and do not meet the substantial presence test based on days spent in the US.
This is a tax classification, not an immigration one, and it is worth confirming rather than assuming — the whole of the rest of this guide depends on it. Someone spending significant time in the US on a work visa may be a resident for tax purposes even without a green card, and the treatment below then does not apply.
Which brokers accept non-residents
Acceptance varies by broker and, critically, by your country of residence. A broker that welcomes an applicant in Singapore may decline one in Nigeria, not because of the individual but because of the firm's compliance policy for that jurisdiction.
The firms most commonly used by non-residents are:
- Interactive Brokers — the widest country coverage, multi-currency accounts, and the default recommendation for internationally based investors. The platform is powerful and correspondingly complex.
- Charles Schwab (international offering) — long-established for non-residents, with higher minimums on the international account than the domestic one.
- TradeStation Global / partner arrangements — used by some non-US investors, often routed through partner entities.
- eToro, Saxo and similar — non-US brokers offering US market access; a different structure, and worth considering alongside the US-domiciled options.
Rather than working from any list, check the broker's own account-opening page for your specific country before doing anything else. Availability changes, and a firm's marketing pages often lag its compliance policy.
What you will be asked to provide
Expect an onboarding process similar to opening a bank account:
- Passport and proof of address, often certified
- Tax identification number from your home country
- Form W-8BEN, certifying you are not a US person and claiming any treaty benefits
- Source of funds information
- Sometimes an investing-experience questionnaire
The W-8BEN is the important one. It is what tells the broker to apply your treaty rate rather than the default withholding rate, and it expires — typically after three calendar years — so it needs renewing. Investors who forget find their dividend withholding quietly reverting to the full rate.
The three tax facts that actually matter
This is the part that determines whether a US brokerage account suits you, and it is generally covered badly in broker marketing.
1. Dividends are withheld at source
US-source dividends paid to a non-resident alien are generally subject to 30% withholding. If your country has a tax treaty with the US, that rate is often reduced — 15% is a common treaty rate, but it varies by country and by income type.
You claim the reduced rate by filing a valid W-8BEN. Without it, expect the full rate.
2. Capital gains are usually not taxed by the US
For most non-resident aliens who are not engaged in a US trade or business and do not meet the substantial presence test, US capital gains on securities are generally not subject to US tax.
This surprises people, and it is a genuine advantage of the NRA position. It does not mean the gains are untaxed — your country of residence will very likely tax them. It means the US is not the one taxing them.
3. US estate tax is the risk almost nobody plans for
This is the one to pay attention to.
US-situs assets — which include shares in US companies and, importantly, US-domiciled ETFs — can be exposed to US estate tax on the death of a non-resident owner. The exemption available to non-residents is dramatically smaller than the one available to US persons: the widely cited figure is US$60,000, against a multi-million-dollar exemption for citizens and residents.
Above that threshold, and absent applicable estate tax treaty relief, the exposure can be substantial.
This single fact drives a great deal of international investing behaviour, and leads directly to the next section.
Why many non-residents use Irish-domiciled funds instead
A common approach among internationally based investors is to hold Irish-domiciled UCITS ETFs rather than US-domiciled ones, even when tracking the same US index.
The logic is:
- Ireland has a favourable treaty position on US dividends at the fund level, reducing the drag relative to holding the same assets directly in some cases.
- Irish-domiciled funds are not US-situs assets, which addresses the estate tax exposure described above.
- They are widely available through non-US brokers and, for many investors, simpler to hold.
The trade-offs are real: sometimes higher expense ratios, thinner liquidity on some products, and reduced access to the full US fund universe. This is not automatically the right answer — it is the alternative most non-residents should at least evaluate before defaulting to a US broker and US-domiciled funds.
Comparing accounts sensibly
Once you have settled the tax question, the platform comparison is ordinary:
| What to compare | Why it matters for a non-resident |
|---|---|
| Country acceptance | The first filter; nothing else matters if you cannot open the account |
| Currency handling | FX conversion costs can exceed trading commissions for cross-border investors |
| Minimum funding | International offerings often carry higher minimums than domestic ones |
| Withdrawal routes and cost | Getting money back to your home country is a recurring, not one-off, cost |
| Tax documentation | Whether the broker issues the year-end forms your home country accepts |
| Platform complexity | Powerful platforms carry a learning curve; match it to how you actually invest |
FX is the underrated line. An investor moving money in and out regularly can pay far more in conversion spread than in commissions, and headline "zero commission" offers frequently make it back there.
Mistakes to avoid
- Choosing a broker before understanding the estate tax position. It is the largest financial variable in the decision and the one least discussed.
- Letting the W-8BEN lapse. Silent, avoidable, and it costs you the treaty rate.
- Assuming your country has a favourable treaty. Check. The rates differ substantially and some countries have no treaty at all.
- Ignoring home-country reporting. Your country of residence may require you to report foreign accounts and holdings. US treatment is only half the picture.
- Confusing "no US capital gains tax" with "tax free". Your residence country's rules apply, and assuming otherwise is how people create problems for themselves.
- Opening an account with a broker that will later restrict your country. Policies change; a firm with a long track record in your jurisdiction is worth more than a marginally lower fee.
A sensible sequence
- Confirm your tax residency status.
- Check whether your country has a US tax treaty and what rate applies to dividends.
- Decide, with advice, between US-domiciled holdings and non-US alternatives, weighing the estate tax exposure.
- Shortlist brokers that accept your country of residence.
- Compare FX and withdrawal costs, not just headline commissions.
- Complete the W-8BEN accurately, and diarise its renewal.
The bottom line
Access is the easy part: several reputable brokers will open an account for a non-resident with ordinary documentation. The decisions that matter are made before you choose a platform — whether US-domiciled assets suit your position at all, given dividend withholding and, above all, estate tax exposure that a great many international investors do not discover until it is expensive.
Take advice on those questions from a cross-border tax professional who knows both your country of residence and the US. It is a modest cost against the size of what it protects.
This guide is general information, not investment, tax or legal advice. Tax rates, treaty terms, exemption thresholds and broker country policies change and depend on your individual circumstances. Verify current rules on IRS.gov and with the relevant authority in your country of residence, and take advice from a qualified cross-border tax professional before investing.