Interactive Brokers

IBKR's fee structure is genuinely cheap — and genuinely complicated. Two plans, two pricing models within Pro, and different rates for every asset class.

IBKR Lite (Free Trading)

• US stocks and ETFs: $0 commissions on exchange-listed securities
• Options: $0.65 per contract (fixed)
• Futures: $0.85 per contract (fixed)
• Margin: Benchmark + 2.5% (currently 6.14%)
• Cash interest: Benchmark - 1.5% (currently up to 2.14%)
• The catch: Lite uses payment for order flow. Your "free" trades are subsidized by potentially worse execution prices.

IBKR Pro (Active Traders)

• US stocks/ETFs (Tiered): $0.0005 to $0.0035 per share — volume discounts kick in automatically
• US stocks/ETFs (Fixed): $0.005 per share, all-in (includes exchange and regulatory fees)
• Options: $0.15 to $0.65 per contract (tiered) or $0.65 flat (fixed)
• Futures: $0.25 to $0.85 per contract (tiered) or $0.85 flat (fixed)
• Margin rates by balance tier:

• Cash interest: Benchmark - 0.5% (currently up to 3.14% on Pro with $100K+)
• No PFOF: Pro uses IB SmartRouting for best execution

No hidden fees on either plan: $0 account minimum, $0 maintenance, $0 inactivity, no platform fees, no added spreads.

Other costs to know:

• Bonds: 10 basis points x face value
• Mutual funds: up to 3% x trade value, capped at $14.95 (but $0 on no-transaction-fee funds)
• Spot currencies: 0.08 to 0.20 basis points x trade value
• International market data: paid subscriptions, typically $5-30/month per exchange

The margin rate comparison is the headline. At 5.14% for a $50K margin loan on Pro, IBKR charges roughly half what Schwab or Fidelity do (both around 12-13%). On a $500K margin balance, the difference is $35,000+ per year. Cash interest tells the same story — Schwab pays a fraction of what IBKR returns on uninvested cash.

This is where IBKR has no real competition among retail brokers. From a single account:

• Stocks on 90+ market centers globally — Tokyo, London, Frankfurt, Sydney, Hong Kong, and dozens more
• ETFs including 150+ no-transaction-fee options
• Options — US and international, with tiered pricing that rewards volume
• Futures and futures options across global exchanges
• Bonds — over 1 million, including US Treasuries with near-24-hour trading
• Mutual funds from 500+ fund families
• Spot currencies (forex) with spreads as narrow as 1/10 of a pip
• US Spot Gold
• Forecast/prediction contracts on political, economic, and climate events
• Fractional shares for US securities

That adds up to 170 markets across 40 countries in 29 currencies. If you want to buy Sony in Tokyo, Nestlé in Zurich, or BHP in Sydney — without routing through ADRs — IBKR is essentially your only mainstream option.

Account types cover everything: individual, joint, trust, UGMA/UTMA custodial, Traditional IRA, Roth IRA, Rollover IRA, SEP IRA, SIMPLE IRA, plus institutional accounts for advisors, hedge funds, and prop trading groups. All individual and retirement accounts qualify for IBKR Lite.

What IBKR does better than anyone:

Margin rates are the clearest differentiator. At 4.14-5.14% on Pro versus 12%+ at Schwab and Fidelity, anyone who borrows against their portfolio is leaving money on the table by not being at IBKR.

Cash earns real money. Up to 3.14% on Pro accounts over $100K, with uninvested cash covered by the Insured Bank Deposit Sweep Program — up to $5.25 million FDIC coverage for individual accounts and $10.25 million for joint accounts. That is significantly more protection than the standard $250K SIPC limit.

The trading tools are institutional-grade and free. Trader Workstation (TWS), IBKR Desktop, mobile apps, Client Portal, 100+ order types, algorithmic trading, API access, paper trading — no additional cost. The Stock Yield Enhancement Program lets you earn extra income lending out your shares, a feature most retail brokers don't offer.

Financial stability is a genuine fortress. $20.5 billion in equity capital, Nasdaq-listed, S&P 500 member, 50 years of operating history. Q4 2025 revenue hit $2.75 billion with a 91% gross margin. This is not a startup.

Where IBKR falls short:

Complexity is the tax you pay for power. TWS was designed by quants and it shows. Even the "simplified" IBKR Desktop has more knobs than most people need. New users will spend their first week just figuring out how to place a basic order.

International market data costs add up. US stock/ETF data is free, but a serious global trader could spend $30-100/month on data subscriptions for non-US exchanges and Level II data.

The cash interest rate has a penalty for smaller accounts. Under $100K, you earn proportionally less — a $10K account gets roughly 1/10th the headline rate. The first $10,000 in cash earns nothing at all.

Customer service is functional, not friendly. IBKR is built for self-sufficient traders. If you want hand-holding, Fidelity and Schwab are significantly better.

Open an IBKR account if you are:

• An active trader who wants sub-penny per-share costs and SmartRouting execution. The tiered Pro pricing rewards volume, and the execution quality is measurably better than PFOF brokers.
• A margin user. Period. The rate differential versus Schwab or Fidelity is thousands of dollars per year on any meaningful borrowed balance.
• An international investor who wants direct exchange access, not ADR wrappers. Nobody else gives retail investors direct access to 170 markets.
• Sitting on a large cash balance and want competitive interest. 3.14% beats what most brokers pay, and the $5.25M FDIC coverage is unmatched.

Look elsewhere if you are:

• A true beginner. Robinhood, Fidelity, or Schwab are dramatically more approachable. IBKR's Lite plan makes it technically accessible, but the interface will overwhelm new investors.
• A buy-and-hold investor with under $100K. The complexity is wasted, the proportional interest penalty stings, and a simple three-fund portfolio at Fidelity or Vanguard requires zero thought.
• Someone who wants integrated banking. Schwab and Fidelity offer checking, debit cards, and seamless cash management. IBKR has the Karta Visa Infinite charge card, but it targets high-net-worth international travelers, not everyday spending.
• Looking for a built-in robo-advisor. IBKR's Interactive Advisors service exists as a separate entity, but Schwab Intelligent Portfolios and Fidelity Go are more tightly integrated.

vs. Fidelity: The best all-around broker for most Americans — zero-fee index funds, excellent research, great service. But IBKR crushes Fidelity on margin rates (5.14% vs ~12.5%), cash interest, and global market access. If you trade actively, use margin, or invest internationally, IBKR wins on cost.

vs. Schwab: Similar to Fidelity — better banking, better support, huge branch network. But Schwab's margin rates hover around 12-13%, and uninvested cash earns far less. Schwab absorbed TD Ameritrade's thinkorswim platform, which is powerful, but IBKR's tools and pricing remain a tier above for active traders.

vs. Robinhood: Both offer $0 stock trades. Robinhood is simpler and prettier. But IBKR offers far more asset classes, much better margin rates, pays real interest on cash, doesn't gamify investing, and has 50 years of stability versus Robinhood's decade. One is a mobile app with a broker attached; the other is a broker with a mobile app attached.

The bottom line: if low costs and global access are your priorities, IBKR has no real competitor. If ease of use and customer support matter more, Fidelity is the better choice for most people.