Ask a room of successful people what they pay for their phone plan, their car lease or their country club dues, and most can tell you to the dollar. Ask what their brokerage charges to borrow on margin, and you’ll get a shrug. That shrug is expensive. In October 2026, the same $25,000 margin loan costs about 5% a year at some brokers and more than 12% at others. Same loan, same stocks as collateral, more than double the price.

I spent the 1990s as a licensed stock broker, and I still trade every week. I’ve watched margin rates drift apart for a long time, but this fall the gap got wide enough to matter even to people who rarely think about their brokerage account. Here’s what’s going on, and how to check whether you’re on the wrong side of it.

What margin actually is

A margin loan is money your broker lends you, secured by the stocks and funds already in your account. People use it to buy more shares, to cover a short-term cash need without selling a position and triggering taxes, or simply because their account was set up as a margin account and a purchase settled before the cash arrived. Interest accrues daily and is usually charged monthly, so it’s easy to miss on a statement.

Brokers set the rate as a base rate plus or minus a spread, and the spread usually shrinks as the loan gets bigger. When the Federal Reserve moves, base rates follow. Several big brokers repriced in mid-September 2026, and they didn’t all move by the same amount.

The numbers, side by side

Here are published margin rates for a $25,000 balance, checked against each broker’s own pricing pages in October 2026:

  • Public: 5.15%
  • Robinhood: 5.25%
  • Interactive Brokers: 5.38% on its Pro plan, 6.38% on Lite
  • Webull: 8.74% for Premium members
  • tastytrade: about 10.50% (reported by a third-party review; the broker doesn’t publish a simple table)
  • Charles Schwab: 11.575%
  • Fidelity: 11.575%
  • E*TRADE: 12.20%

Now put dollars on it. Carry a $25,000 balance for a year at 12.20% and you pay about $3,050 in interest. At 5.15%, you pay about $1,290. The difference is roughly $1,760 a year for the identical loan.

At $100,000 the gap grows. E*TRADE’s published rate at that level is 11.20%, or about $11,200 a year. Public’s is 5.00%, about $5,000. That’s $6,200 a year, every year, for nothing more than where the account happens to sit.

Why the big names cost more

The pattern is consistent: the newer, app-first brokers and Interactive Brokers sit at the bottom of the range, and the long-established full-service firms sit at the top. The established firms are betting that their customers value the branch network, the advisors, the research and the familiar name enough not to shop the rate. For many of their clients, that bet pays off, mostly because nobody checks.

There’s also a negotiation angle that rarely gets mentioned. Large-account clients at full-service brokers can often get a lower rate simply by calling and asking, especially if they mention a specific competitor’s number. The posted rate is a starting point for those clients.

Who gets hit hardest

The people who overpay most are rarely aggressive traders. They’re investors who borrow against a portfolio for a bridge to a home purchase, a tax bill or a business expense, because it’s faster than a bank loan and doesn’t force them to sell. That’s a sensible use of margin, and it often runs for months. A business owner who borrows $100,000 against a stock portfolio for six months to cover a seasonal cash crunch pays about $5,600 at 11.20% and about $2,500 at 5.00%. The paperwork is identical. The only variable is which logo is on the statement.

Long-time clients of the big firms are also the least likely to notice. Their accounts were opened when rate differences were small, and nothing on a monthly statement prompts a comparison.

The other half: what your cash earns

Margin rates are what you pay. Cash yield is what you earn on money sitting uninvested, and the spread there is just as wide.

Some brokers sweep idle cash into a bank account paying close to nothing; Schwab’s standard bank sweep has been reported at about 0.01%. Others pay a competitive rate: Robinhood pays 3.6% APY to Gold subscribers, Public pays 3.30% APY in its high-yield cash account, and Fidelity’s default SPAXX money market fund showed a 3.49% seven-day yield in early October. Interactive Brokers pays 3.38% on its Pro plan but skips the first $10,000.

Leave $50,000 sitting in cash for a year at 0.01% and you earn about $5. At 3.5% you earn about $1,750. If you keep a cash cushion at your broker, find out which kind of account it’s in. At most firms, moving it into a money market fund takes a few clicks.

What to do this week

  1. Find your rate. Log in and search for “margin rates” in your broker’s help pages, or look at the interest line on your last statement. Divide the annual interest by the average balance if the rate isn’t shown.
  2. Check your cash. See where uninvested cash goes. If it’s a bank sweep paying a fraction of a percent, look for a money market option.
  3. Call before you move. If your balance is large, ask your current broker to match a lower competitor’s rate. Have the number ready.
  4. Compare the whole package. A low margin rate doesn’t help if the platform is wrong for how you trade. Look at commissions, account types, retirement accounts and support too.
  5. Keep leverage modest. A cheaper loan is still a loan. Falling markets trigger margin calls, and a broker can sell your positions without asking.

A note on futures

If you trade futures, “margin” means something different. Futures margin is a good-faith deposit held against your positions. Nobody lends you anything, so you pay no interest on it. What you do pay is commission per contract, and that varies widely too. A trader doing 100 round trips a month in Micro E-mini contracts pays about $50 in commissions at the cheapest brokers and $450 at the most expensive.

The full comparison

I built BrokerNimble.com to keep these numbers in one place. It compares margin rates, cash yields, futures commissions and features across 14 US brokers, with every figure linked to the broker’s own page and dated. The margin and cash table has the full breakdown at different loan sizes, and each broker has its own page with fees and what changed this year.

Rates change whenever the Fed moves, so check the date next to any number before you act on it. Five minutes with your statement could easily be worth a few thousand dollars a year.

Disclosure: Peter Agro runs BrokerNimble.com, which may earn referral fees when readers open accounts through some of its links. Rates were checked against broker pages in October 2026 and change often; figures marked as reported come from third-party sources. This article is for information only and is not investment advice. Margin trading involves substantial risk, including losses greater than your deposit.