Interactive Brokers client equity reached $962.8 billion at the end of August 2026, the broker’s latest monthly metrics show, putting the $1 trillion milestone within touching distance. Daily average revenue trades (DARTs, the number of trades per day that generate commission or spread income) slipped 3% from July but remained 23% above the same month a year earlier.
What the August Numbers Actually Show
The headline DARTs figure of 4.28 million per day sits against a backdrop of steady account growth. Client accounts reached 5.460 million, up 35% year-on-year, with roughly 143,000 new accounts opened during August alone. That pace of account addition matters: more accounts spread the fixed costs of running a brokerage platform across a larger base.
According to Interactive Brokers’ August 2026 metrics reported by Yahoo Finance, the broker recorded 168 annualised average cleared DARTs per client account during the month. Average commission per cleared commissionable order came to $2.52, including exchange, clearing and regulatory fees.
Client margin loan balances (money clients have borrowed against their portfolios) rose to $101.5 billion, up 41% year-on-year and 1% from July. For context, Interactive Brokers’ Q2 2026 earnings release showed the annualised yield on those margin loans was 4.10% at the quarter end. A higher loan balance at that yield translates directly into net interest income, which in Q2 accounted for $1.06 billion of the broker’s $1.90 billion in GAAP net revenues.
Client credit balances (cash held in client accounts that the broker can lend out) reached $185.6 billion, up 27% from August 2025 and 3% from July. Of that total, $6.4 billion sat in insured bank deposit sweeps, per the company’s monthly metrics release.
Interactive Brokers Client Equity: The $1 Trillion Context
Interactive Brokers client equity has now risen 35% year-on-year, adding $56.1 billion from July’s $906.7 billion in a single month. To put the trajectory in perspective, the broker’s electronic brokerage statistics show client equity was $814.3 billion as recently as January 2025. In roughly nineteen months the figure has grown by nearly $150 billion.
The July DARTs dip (down 16% from June to 4.43 million) attracted attention at the time. August’s 3% further decline is more modest and sits alongside strong asset growth, suggesting clients are holding larger positions rather than churning them frequently. That mix tends to favour net interest income over commission revenue, a dynamic Interactive Brokers has already benefited from: its Q2 2026 pretax profit margin reached 77%.
For investors holding IBKR shares, the direction of margin loan balances is worth watching. At $101.5 billion and growing at 41% year-on-year, they represent a meaningful revenue line whose yield depends partly on prevailing interest rates. Any shift in Federal Reserve policy affects what Interactive Brokers can charge on those loans and what it pays on client credit balances.
Expanding the Business While Managing Platform Hiccups
August also brought operational news beyond the monthly metrics. On 5 August 2026, Interactive Brokers announced that eligible clients outside Brazil can now trade Brazilian futures through the B3 exchange, adding to the equities access the broker already offered on that market. A further announcement on 18 August expanded funding options for Latin American investors.
The broker also reported a temporary access issue during US trading hours that affected a small number of clients in certain Asia-Pacific data centres. Access was restored within an hour, the company said. Platform resilience tends to receive scrutiny when a broker is growing accounts as quickly as Interactive Brokers is: adding 143,000 users in a month raises the stakes for outage events.
Separately, the broker partnered with South Korea’s DAOL Investment and Securities to give local investors access to global stocks through DAOL Fi PRO, extending its footprint in North Asian retail markets.
The $1 trillion client equity level is the threshold to watch in September. If markets hold broadly steady, the broker’s own account-growth momentum suggests it could cross that line before the end of the quarter. The Q3 2026 earnings call, where management typically discusses DARTs trends and interest income margins together, will offer the clearer read on whether August’s trading slowdown carried into September or reversed.
