WhichBrokerScore breakdown
Scores follow our public methodology — fees 30%, platforms 20%, trust 25%, markets 15%, support 10%. How we score
What we like
- Unmatched global market access — 150 exchanges from one account
- Lowest margin rates in the retail industry
- Nasdaq-listed, 45+ years of history, fortress balance sheet
- Interest paid on idle cash balances
What to watch
- Trader Workstation has a steep learning curve
- Customer support can be slow and impersonal
- Interface overkill for someone buying two ETFs a month
Who Interactive Brokers is actually for
Interactive Brokers is the oldest firm in our comparison by decades — founded in 1978, listed on Nasdaq, and run with a balance sheet that most banks would envy. It is also the only broker here that genuinely erases the line between retail and institutional access: 150 markets in 34 countries, real stocks, options, futures, bonds, funds and forex from a single account, with margin rates that undercut every mainstream rival.
The right user is a serious investor or active trader with global ambitions: someone buying Japanese equities and US treasuries in the same portfolio, an options trader who needs proper chains and analytics, or anyone borrowing on margin, where IBKR’s rates save four-figure sums annually versus typical brokers. The wrong user is someone buying two ETFs a month who wants a friendly app — the learning curve here is real, and a simpler platform like XTB or eToro will make them happier.
Opening an account: thorough, not fast
There’s no minimum deposit, but expect the most detailed application in this comparison: regulatory status, trading experience per asset class, financial profile. This thoroughness is the flip side of being able to trade almost anything — the broker has to establish what it may let you do. Approval can take a day or two rather than minutes. Once open, you can hold and deposit in multiple currencies natively, a quiet superpower for anyone living outside the US: no forced conversions, and currency exchange at near-interbank spreads when you choose it.
The platforms: power first, polish second
- Trader Workstation (TWS) — the flagship desktop platform and the reason for both the 9.8 markets score and the platform score of “only” 8.4. Nothing else in retail matches its scope: options analytics, algos, scanners, portfolio margining tools. It also looks and feels like the professional software it is; the first week is genuinely disorienting.
- IBKR Desktop — the newer, saner desktop app that covers what most users need with far less friction. If TWS intimidates, start here.
- IBKR Mobile & Client Portal — competent, information-dense mobile and web experiences; the portal handles most investor workflows without touching TWS at all.
The honest framing: IBKR’s platforms are the most capable in this comparison and the least welcoming. The gap between what you can do and how easily you can find it is wider than anywhere else we score.
Fees: the low-cost benchmark
| Cost | What to expect |
|---|---|
| US stocks (IBKR Lite, US residents) | $0 commission |
| US stocks (Pro, tiered) | from $0.0005/share, ~$0.35–1 minimum per order |
| European/Asian stocks | low per-order commissions, varying by exchange |
| Margin rates | the lowest in the retail industry, near benchmark rates |
| Idle cash | interest paid on qualifying balances — rare among brokers |
| FX conversion | near-interbank spreads, tiny commission |
| Inactivity fee | none |
Two items in that table quietly dominate long-term returns. Margin at near-benchmark rates means leveraged investors save enormously versus the 6–10%+ typical elsewhere. And earning interest on idle cash — rather than the broker keeping it, as most do — turns uninvested balances from dead weight into yield. Rates and tiers change, so verify current terms on the broker’s site.
Costs are not uniformly rock-bottom: some market-data subscriptions cost extra, and small trades on exotic exchanges can carry minimum commissions that sting. But taken as a whole, our 9.4 fees score reflects a structure that is very hard to beat at any scale.
What you can actually do with it
The product breadth deserves its own section, because it changes how you invest rather than just where:
- Fractional shares and recurring investments make dollar-cost averaging into US and European stocks practical from small amounts, despite the platform’s professional image.
- Bonds — corporate, municipal and government — are searchable and tradable directly, an asset class most retail brokers simply don’t carry.
- Global funds and ETFs across dozens of exchanges, with UCITS options for European residents.
- Options and futures with real analytics: chains, strategy builders, probability tools and margin previews before you commit.
- Stock Yield Enhancement — opt in and IBKR lends out your fully paid shares, splitting the lending revenue with you; a modest but real yield on holdings you’d keep anyway.
- Multi-currency cash management — hold, convert and earn interest across currencies at near-interbank pricing, which quietly replaces a foreign-currency bank account for many expats and international investors.
No other broker in our comparison offers even half of this list under one login.
Safety: the strongest trust profile we score
Interactive Brokers is Nasdaq-listed with audited public financials, holds far more capital than regulators require, and is overseen by the SEC and FINRA in the US, the FCA in the UK, the Central Bank of Ireland for the EU, ASIC in Australia and MAS in Singapore. US-side securities accounts carry SIPC protection, with European and other entities under their local schemes. After nearly five decades — including 1987, 2008 and every volatility event since — the firm’s risk management record speaks for itself. The 9.6 trust score is the highest we award.
One risk note belongs here anyway: IBKR gives you access to genuinely dangerous instruments — futures, short options, portfolio margin — with comparatively few guardrails once you’re approved. The safety of the institution does not make the instruments safe.
Where Interactive Brokers falls short
- The learning curve is the price of admission, and support won’t carry you: it’s competent for account mechanics but can be slow and impersonal — hence the 7.8 support score.
- Overkill for simple needs. Fractional-share ETF investing works fine here, but nothing about the experience is optimized for it.
- Interface density on mobile and web reflects the platform’s ancestry; expect information-rich screens rather than guided flows.
Making the learning curve survivable
A practical note for anyone deterred by TWS’s reputation: you don’t have to start there. A sensible path is Client Portal for account setup and simple orders, IBKR Desktop once you want watchlists and charting, and TWS only when a specific need — options analytics, algos, portfolio margin — pulls you in. The paper-trading account mirrors the real platforms with live-like data, so the expensive part of the learning curve can happen with simulated money. Give it two deliberate weeks and the density starts reading as information rather than noise.
Verdict
9.0 / 10. The best broker we score, for the people it’s for: global market access nobody else matches, the lowest financing costs in the industry, interest on idle cash, and a fortress institution behind it all. The trade-off is a product that respects your intelligence more than your time. Long-term investors comparing it against a friendlier multi-asset platform should read XTB vs Interactive Brokers; beginners who want stocks with training wheels will be better served starting at eToro and graduating here later.
Open the official site — check the current terms for your country before depositing.