How Interactive Brokers Makes Money

Interactive Brokers operates a highly automated, low-overhead electronic direct-market-access brokerage model driven by two powerful economic engines: (1) Net Interest Income (~65% of net revenue), where the firm earns high spreads by collecting low-cost client cash balances and investing them in short-term US Treasury bills or lending them to margin borrowers at industry-leading benchmark-plus margin rates; and (2) Commissions and Execution Fees (~30% of net revenue), earned by routing trades across 150+ market centers globally using its proprietary SmartRouting algorithm, which continuously scans competing exchanges to deliver National Best Bid and Offer (NBBO) execution. By automating trade matching, margin risk evaluation, and account administration, Interactive Brokers maintains an ultra-lean global headcount of approximately 3,100 employees, producing extraordinary operating leverage and pre-tax margins exceeding 70%.

Interactive Brokers is executing a four-pronged global growth strategy under CEO Milan Galik: (1) Introducing Broker and White-Label Institutional Scaling: Partnering with regional banks, wealth managers, and neo-brokers (such as HSBC, Revolut, and Webull) who utilize IBKR's back-end clearing and execution APIs to power international investing for their retail bases; (2) Global Emerging Market Expansion: Accelerating localized onboarding across Latin America, Southeast Asia, India, and the Middle East, allowing investors in emerging economies to custody assets in US dollars and trade global securities; (3) Expanding High-Yield Cash and Wealth Management Services: Attracting mass-affluent savers by paying top-tier market interest rates (currently up to 4.83% on uninvested cash balances) paired with the IBKR Debit Mastercard; and (4) Modernizing Institutional API Architecture: Upgrading Python, C++, and REST APIs alongside IBKR Desktop to attract quantitative institutional funds and automated trading desks.