Interactive Brokers Review

Interactive Brokers is the broker professionals name when you ask what they actually use. It has the lowest margin rates in the business, access to 150-plus markets in over 30 countries, and a platform serious enough to run a small fund from. None of that is the thing most people get wrong about it.

The thing most people get wrong is the choice you make on the way in the door: IBKR Lite or IBKR Pro. That single decision changes how your orders are filled, how much you earn on idle cash, and how much you pay to borrow — and the “free” option is not automatically the better one. Get that right and IBKR is the most cost-efficient serious broker available, which is why it earns a 4.7. Get it wrong, or expect a beginner-friendly app, and you’ll either leave money on the table or bounce off the learning curve.

Who IBKR is for — and who should look elsewhere

IBKR is built for active, cost-sensitive, and globally-minded traders: people who trade size, use margin, hold cash they want paid on, or want direct access to international exchanges most US brokers don’t touch. It’s also quietly excellent for buy-and-hold investors who want rock-bottom margin and high interest on cash — if they’re willing to learn the tools.

Look elsewhere if you want a simple, hand-holding mobile experience — Robinhood or SoFi will feel friendlier — or if you’ll never use the global access, advanced order types, or low margin that justify the complexity. For pure US stock investing with zero learning curve, Fidelity or Schwab are easier homes.

The cost story: the Lite-vs-Pro fork is the whole game

This is the section that matters more than any other, so read it before you open an account.

IBKR Lite offers $0 commissions on US-listed stocks and ETFs. The catch is how it pays for that: Lite routes orders via payment for order flow, which can mean slightly worse fills; it pays less interest on your idle cash (roughly the benchmark minus 1.5%); and it charges more on margin (a ~2.5% markup).

IBKR Pro charges tiered commissions — from $0.0035 per share (with a low per-order minimum), and options from $0.65 down to as little as $0.15 per contract at volume — but in exchange it avoids PFOF entirely, using IBKR’s SmartRouting to hunt the best available price across exchanges and dark pools; it pays more on idle cash (benchmark minus ~0.5%); and it charges the lowest margin rates in the industry (a markup of ~0.5%–1.5%). On a $50,000 cash balance, Pro’s better cash rate alone is worth roughly $500 a year versus Lite.

The takeaway: for anyone who trades meaningful size, carries margin, or holds real cash, Pro’s commissions are usually more than offset by better execution, higher cash interest, and cheaper borrowing. Lite is the right pick mainly for low-activity investors who hold little cash and never borrow. The mistake is assuming “free” (Lite) is cheaper — for an active trader it often isn’t. Because IBKR’s underlying pricing is the most competitive on this entire list, Fees & value scores 4.9, the highest fee score we give.

Platforms and tools

IBKR’s range runs from a clean mobile app and a simple web portal up to Trader Workstation (TWS) — a professional-grade desktop platform with deep order types, algorithmic routing, risk tools, and full API access for automated trading. TWS is genuinely powerful and genuinely intimidating; it’s a cockpit, not a toy, and there’s a real learning curve. IBKR has improved the simpler surfaces over the years, so beginners aren’t forced into TWS, but the platform’s center of gravity is the serious trader. Platform & tools scores 4.7 — elite capability, with usability the only thing holding it back.

What you can trade

This is IBKR’s standout category. Stocks, ETFs, options, futures, bonds, mutual funds, currencies, and more — across 150+ markets in 30-plus countries, with fractional shares on US and Canadian stocks and ETFs. If you want to buy equities in Tokyo, London, and New York from one account in multiple currencies, almost nothing else comes close. Tradable assets scores a perfect 5.0.

Regulation, trust, and safety

Interactive Brokers is regulated by the SEC and FINRA in the US, with brokerage accounts covered by SIPC (up to $500,000 in securities, including a $250,000 cash limit) plus additional excess protection, and it operates under top-tier regulators across its global entities. Publicly traded, founded in 1978, and known for conservative risk management (sometimes aggressively so — IBKR will auto-liquidate margin positions faster than most), it’s a deeply established firm. Regulation & trust scores 4.8.

Support and the day-to-day

Support is IBKR’s weakest dimension. It has improved — phone, chat, and a ticket system exist — but historically it has trailed the white-glove service of Fidelity or Schwab, and the platform’s complexity means newer users hit more questions. Account opening is more involved than the app brokers, reflecting the broker’s institutional roots. Support & experience scores 4.2, the lowest of IBKR’s categories and the main reason it sits just behind Fidelity and Schwab overall.

Where IBKR falls short

• IBKR Lite’s “free” trading uses PFOF, pays less on cash, and costs more on margin — Pro is the better choice for serious traders, but it’s a commission account.
• Trader Workstation has a steep learning curve and can intimidate newer traders.
• Customer support has historically trailed peers, though it’s improved.
• Aggressive auto-liquidation on margin can catch unprepared traders off guard.

These are the trade-offs of a tool built for professionals. None of them dents the core value for the trader IBKR is designed around.

Why this score

The 4.7 overall is the weighted average of the five category scores above. IBKR is carried by the two things it does better than anyone — cost (the 4.9 Fees score, the highest we award) and breadth of markets (a perfect 5.0 on assets) — and held back almost entirely by support and platform usability. In other words, the rating reflects exactly what IBKR is: the most capable and cost-efficient broker on the list, with a learning tax attached.

What to watch

• Your Lite-vs-Pro choice, and whether your activity level means Pro’s execution, cash, and margin advantages outweigh its commissions.
• IBKR’s cash interest and margin rates, which move with benchmark rates — they’re a core reason to choose Pro.
• Auto-liquidation rules if you trade on margin.

Bottom line

Interactive Brokers is the professional’s broker: unmatched market access, the lowest margin rates available, the best interest on idle cash among major brokers, and a platform that can do nearly anything — provided you choose Pro and invest the time to learn it. It is not the friendliest place to start, and support is its soft spot. But for an active, global, or cost-obsessed trader, nothing on this list delivers more for the money. That’s a 4.7.

Frequently asked questions

Should I choose IBKR Lite or IBKR Pro? Lite offers $0 US stock/ETF commissions but uses payment for order flow, pays less on cash, and charges more on margin. Pro charges low tiered commissions but avoids PFOF, pays more on idle cash, and has the lowest margin rates. Active traders, margin users, and anyone holding real cash are usually better off on Pro.

Does Interactive Brokers have the lowest margin rates? It is consistently among the lowest in the industry, especially on IBKR Pro. If you borrow to trade, that’s one of the strongest reasons to use IBKR.

Is Interactive Brokers good for beginners? Less so than Fidelity, Schwab, or Robinhood. The simpler app and web portal are usable, but the platform’s depth and the more involved onboarding suit experienced traders better.

What can I trade at IBKR? Stocks, ETFs, options, futures, bonds, mutual funds, and currencies across 150+ markets in 30-plus countries, with fractional US and Canadian shares.

Is my money safe at Interactive Brokers? IBKR is SEC- and FINRA-regulated with SIPC coverage (up to $500,000 in securities, $250,000 cash) plus additional excess protection, and it’s a publicly traded firm operating since 1978. None of that protects against investment losses.

---

Fees, rates, and account terms are current as of the “Broker data last verified” date shown above and change over time; confirm specifics on Interactive Brokers’ site before opening an account. This review is editorial opinion for informational and educational purposes only and is not investment advice. Trading and investing involve risk, including loss of principal.