Best Global Brokers for International Investing
The best global broker depends on what you need to cross: borders, currencies, or product types. Here's how Interactive Brokers, Saxo Bank, and local platforms actually compare.
Don't have time? Here's what you need to know:
- 1A genuinely global broker accepts non-residents, accesses multiple regions, and converts currency cheaply, and many big names fail at least one.
- 2Currency-conversion spread often matters more than commission, since it hits every contribution and dividend for life.
- 3Interactive Brokers leads on breadth and cost, Saxo on polish, and a strong local platform can win for single-market home-currency investors.
- 4Check residency acceptance, exact fund availability, all-in cost, and which regulated entity protects your account before committing.
What Actually Makes a Broker Global
A broker is not global because it has an international-sounding name. It is global if it does three specific things well: opens accounts for non-residents, gives access to multiple exchanges across regions, and lets you hold and convert several currencies cheaply. Plenty of well-known brokers fail at least one of these, which is why a cross-border investor's shortlist looks different from a domestic investor's.
The cost that quietly dominates a global account is not commission, it is currency conversion. A broker charging a 0.5% to 2% FX markup on every contribution and dividend can cost you far more over time than one with slightly higher trading commissions but near-interbank conversion. When comparing global brokers, weigh the FX spread as heavily as the headline trading fee.
The Main Contenders Compared
Interactive Brokers is the default for a reason: roughly 150 markets, 20-plus currencies at near-interbank rates, accounts for residents of most countries, and very low costs. Its weakness is a steep learning curve and support that assumes competence rather than offering hand-holding. Saxo Bank is the polished alternative, with a strong platform, broad market access, and a more refined experience, but generally higher costs and, in some regions, higher minimums.
Local and regional platforms occupy the third slot. A good domestic broker may offer cheaper or simpler access to the specific UCITS funds you want, in your own currency, with local-language tax reporting, which can outweigh a global broker's breadth if you only need one market. The right answer is not universal: a settled investor buying one all-world fund in their home currency may be best served locally, while a multi-country investor needs the breadth only a true global broker provides.
| Broker type | Market access | FX cost | Best for |
|---|---|---|---|
| Interactive Brokers | ~150 markets | Near-interbank | Multi-country, cost-focused |
| Saxo Bank | Broad, global | Higher than IBKR | Polished UX, willing to pay |
| Strong local platform | Often 1 market | Varies | Single-market, home-currency |
What to Check Before You Commit
Before opening any account, confirm four things specific to your situation. First, does the broker accept your country of residence and citizenship; some exclude US persons or particular nationalities. Second, does it actually list the funds you intend to buy, since access to an exchange does not guarantee access to every UCITS fund. Third, what is the all-in cost including the FX spread on your real contribution pattern, not just the advertised commission. Fourth, which regulatory entity holds your account and what investor protection covers it.
That last point matters more than most people assume. Global brokers operate through different regional entities, each regulated locally with different protection schemes and limits. The same brand can offer materially different safeguards depending on which entity your account sits under, so read the onboarding details rather than assuming the brand name guarantees a particular protection level.
Important: Account access to an exchange is not the same as access to a specific fund. Confirm the broker actually lists the exact UCITS ETFs you plan to buy before opening the account, not just the exchange they trade on.
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Matching the Broker to Your Situation
If you move frequently, invest across several markets, or live somewhere with limited domestic options, a true global broker like Interactive Brokers usually wins on access and cost despite its complexity. If you value a smoother interface and are willing to pay for it, Saxo is a credible alternative. If you are settled, buying a single home-currency fund, and want local tax reporting, a strong domestic platform may beat both.
The decision is rarely about which broker is best in the abstract and almost always about which is best for your specific crossing, of borders, currencies, or product types. Map your real needs to the four checks above, and the right choice usually becomes obvious. Avoid choosing on brand reputation alone, because the cheapest, broadest broker for a nomad can be the wrong fit for a settled local investor, and vice versa.
Tip: Run your actual annual contribution and dividend pattern through each broker's fee schedule, including FX. The winner on a spreadsheet is often not the one with the lowest advertised commission.
Frequently Asked Questions
Which is the best global broker for ETF investing?
Interactive Brokers is the most common choice for cross-border investors because of its wide market access, low costs, near-interbank currency conversion, and willingness to serve residents of most countries. Saxo Bank is a more polished but pricier alternative, and a strong local broker can beat both if you only need one market in your home currency.
Why does currency conversion cost matter so much?
Because it applies to every contribution and every foreign dividend, year after year. A retail FX markup of 0.5% to 2% can quietly cost more over a lifetime than the difference in trading commissions between brokers. A broker that converts near interbank rates can save a cross-border investor a significant amount over decades.
Is my money equally protected across global brokers?
No. Global brokers operate through different regional entities, each regulated locally with its own investor-protection scheme and coverage limits. The same brand can offer different safeguards depending on which entity holds your account, so check which entity you are onboarded with and what protection applies before funding it.
Should US citizens abroad use these brokers?
US citizens need a broker that accepts US persons and lets them hold US-domiciled funds, because PFIC rules make foreign-domiciled funds costly for them. Some global brokers restrict US persons, so a US citizen abroad should specifically confirm acceptance and US-fund access, and generally seek advice tailored to US-person status.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.