A margin account lets you borrow money from your broker to buy stocks or other investments

A margin account is a brokerage account where you can borrow cash from your broker to purchase securities. You put up some of your own money—called the margin—and the broker lends you the rest. The securities you buy sit as collateral for that loan. This is different from a regular cash account, where you can only buy what you have money for.

The appeal is leverage: a smaller amount of your own cash can control a larger investment position. If the investment goes up, your gains are larger relative to what you actually spent. But if it goes down, your losses are also larger—and you still owe the full amount you borrowed, plus interest.

Margin accounts are common among active traders and investors who want flexibility. But they carry real costs and real risks that a cash account does not.

Key Takeaways

  • You must deposit a minimum amount of your own money—typically $2,000 to $5,000 depending on the broker—before you can open a margin account.
  • Your broker charges interest on borrowed money, usually between 4% and 12% per year depending on how much you borrow and current rates.
  • If your account value drops below the broker's maintenance requirement, you receive a margin call and must deposit more cash or sell positions when ready.
  • Margin amplifies both gains and losses, so a 20% drop in your investment can wipe out 50% or more of your own money.

How much you can borrow and what it costs

The amount you can borrow depends on Regulation T, a Federal Reserve rule that sets the initial margin requirement at 50% for most stocks. That means if you want to buy $10,000 worth of stock, you must put up at least $5,000 of your own money and can borrow up to $5,000 from your broker.

Your broker will also set a maintenance requirement, usually 25% to 30% of the total value of your positions. This is the minimum equity you must keep in the account at all times. If your account falls below that level—because your investments lose value—the broker will issue a margin call.

Interest on borrowed money varies by broker and by how much you borrow. Most brokers charge between 4% and 12% annually, with higher rates for larger borrowers and lower rates for larger accounts. Some brokers offer tiered rates: borrow less, pay more per dollar; borrow more, pay less per dollar. You pay this interest whether your investments gain or lose money.

What happens when you get a margin call

A margin call occurs when the value of your account drops below the maintenance requirement. Your broker is not asking—they are notifying you that you must act when ready. You have a few options: deposit cash, sell some of your positions to raise cash, or transfer securities into the account.

If you do not respond within the timeframe your broker sets (usually one to five business days), the broker will sell your positions without your permission to bring the account back into compliance. They will typically sell the most liquid positions first, which may not be the ones you wanted to sell. You still owe any losses, and you pay the broker's transaction costs on top.

A margin call can force you to lock in losses at the worst possible time. If you borrowed heavily and the market drops 20%, you may be forced to sell at a loss just to meet the requirement, even if you believe the investment will recover.

The difference between initial margin and maintenance margin

Initial margin is what you must put down when you first buy a security. For stocks, Regulation T sets this at 50%. Some brokers require more for certain securities or for accounts below a certain size.

Maintenance margin is the minimum you must keep in the account going forward. The Federal Reserve sets a floor of 25%, but most brokers require 30% to 35%. The difference matters: you can buy with 50% down, but if your investment drops and your equity falls below 30%, you get a margin call even though you met the initial requirement.

Different securities have different requirements. Penny stocks, for example, often cannot be bought on margin at all. Bonds, mutual funds, and options have their own rules. Your broker's website or account agreement will spell out which securities are marginable and at what rate.

When margin makes sense and when it does not

Margin works best for investors with a clear strategy, steady income, and the ability to cover a margin call without selling positions. If you are borrowing to buy a stock you plan to hold for years and you have cash reserves to handle a 30% market drop, margin might let you increase your position size responsibly.

Margin does not work for investors who cannot afford to lose more than they put in, who are borrowing to cover living expenses, or who are trying to time the market. If a 20% drop in your investment would force you to sell at a loss just to meet a margin call, you are borrowing too much. The interest cost also eats into returns on smaller accounts—if you are borrowing $1,000 at 8% interest, that is $80 a year in costs before your investment makes anything.

Many investors use margin only for short-term trades where they expect to close the position within days or weeks, not for long-term holdings. Others avoid it entirely and accept that they can only invest what they have.

How margin accounts affect taxes and record-keeping

Interest paid on margin loans is tax-deductible only if you use the borrowed money to buy investments that generate taxable income—stocks that pay dividends or bonds that pay interest. If you borrow to buy growth stocks that do not pay dividends, the interest is not deductible.

Your broker will send you a 1099-INT form at tax time showing the interest you paid. You will also receive a 1099-B showing all your sales and their proceeds. Margin accounts generate more trading activity for many people, which means more capital gains to track and report. Keep detailed records of when you bought, when you sold, and what you paid in interest.

If you carry a margin balance across multiple tax years, the interest accrues and compounds. Some brokers allow you to pay interest monthly; others add it to your balance. Check your account agreement to understand how your broker handles this.

Alternatives to margin if you want leverage

If you want exposure to larger positions without a margin account, you have other options. Options contracts let you control a large amount of stock with a small upfront payment, though they expire and have their own complexity. Leveraged ETFs use derivatives to amplify returns of an index, though they decay over time and are meant for short-term trading, not buy-and-hold.

You can also straightforward save more money and buy more shares with cash. This takes longer but eliminates interest costs and margin calls. For most long-term investors, this is the safer path.

If you are interested in margin because you need cash for something else, a personal line of credit or home equity line of credit might be a better fit—they have fixed rates and do not force you to sell investments if the market drops.

Frequently Asked Questions

Can I lose more money than I put into a margin account?

Yes. If you borrow $5,000 and buy $10,000 worth of stock, and that stock drops to $3,000, you still owe the $5,000 you borrowed plus interest. You have lost your entire $5,000 and still owe money. In extreme cases with volatile securities, losses can exceed your initial deposit.

What is the minimum amount I need to open a margin account?

Most brokers require a minimum deposit of $2,000 to $5,000 to open a margin account. Some require more. Check your broker's account agreement for their specific minimum.

Can I use margin to buy any stock?

No. Stocks under $5, penny stocks, and some newly issued stocks cannot be bought on margin. Your broker will show you which securities are marginable when you place an order. Bonds, mutual funds, and options have different margin rules.

How quickly can a margin call happen?

A margin call can happen when ready if the market moves sharply against your position. Your broker monitors your account continuously during market hours. You may have one to five business days to respond, depending on your broker's policy.

Do I pay interest on margin if I do not use it?

No. You only pay interest on the money you actually borrow. If you open a margin account but buy everything with cash, there is no interest charge.