Margin trading lets you borrow money from your broker to buy more stocks than you could pay for in cash

When you open a regular brokerage account, you can only buy as many shares as you have cash for. Margin trading removes that limit. Your broker lends you money — called a margin loan — so you can purchase additional shares. You keep the shares in your account as collateral for the loan, and you pay interest on the borrowed amount.

The appeal is straightforward: if you have $5,000 and your broker offers 2-to-1 margin, you can control $10,000 worth of stock. If that stock rises 20 percent, your $5,000 becomes $7,000 — a 40 percent gain on your actual cash. But the reverse is also true. If the stock falls 20 percent, your $5,000 becomes $3,000 — a 40 percent loss. You magnify both wins and losses.

Not every brokerage offers margin accounts, and not every investor is allowed to open one. Your broker will check your income, net worth, and trading experience. You must also maintain a minimum account balance — typically $2,000 — to keep the account open.

Key Takeaways

  • Margin trading uses borrowed money to buy more shares than you could afford with cash alone, which magnifies both gains and losses.
  • Your broker charges interest on the borrowed amount, and that interest cost reduces your profit or increases your loss.
  • If your account value falls below the broker's maintenance requirement, you receive a margin call and must deposit cash or sell shares when ready.
  • Margin accounts require a minimum opening balance (usually $2,000) and are not available to all investors or all brokerages.
  • Losses on margin trades can exceed your initial investment, meaning you can owe money even after selling all your shares.

How the margin loan works in practice

When you buy stock on margin, the transaction happens the same way as a cash purchase — you place an order and the shares appear in your account. The difference is in how you pay for them. Your broker advances the money and charges you interest, usually calculated daily and added to your account monthly.

The interest rate varies by broker and by the size of your loan. A broker might charge 6 to 12 percent annually on margin balances, though rates change with market conditions. If you borrow $5,000 at 8 percent, you pay roughly $33 per month in interest. That cost comes out of any gains you make, so you need the stock to rise enough to cover both the interest and your original investment before you break even.

You can repay the margin loan at any time by depositing cash or selling shares. Many investors repay gradually as they make profits, while others hold the loan for years. There is no fixed repayment schedule — the loan stays open as long as you maintain the account and meet the broker's requirements.

Understanding margin calls and forced selling

Every margin account has a maintenance requirement — a minimum percentage of your account value that must be your own cash rather than borrowed money. If your account falls below that threshold, your broker issues a margin call. This is a demand to deposit cash or sell shares within a set time frame, usually one to five business days.

Here is a concrete example: you deposit $10,000 and borrow $10,000 to buy $20,000 worth of stock. Your maintenance requirement is 30 percent, meaning at least $6,000 of your account must be your own money. If the stock falls to $16,000, your equity is now $6,000 (the $10,000 you deposited minus the $4,000 loss). You are exactly at the maintenance level. If it falls another $500, you fall below the requirement and receive a margin call.

When a margin call arrives, you have two choices: deposit enough cash to bring your account back above the maintenance level, or sell shares to reduce the loan balance. If you do neither within the important date, your broker will sell shares automatically — usually the ones with the biggest losses first — to raise the cash. You have no control over which shares are sold, and you still owe any transaction fees.

The real cost of margin: interest and losses that exceed your investment

The most dangerous feature of margin trading is that your losses are not capped at your initial investment. If you deposit $5,000 and borrow $5,000 to buy $10,000 of stock, and that stock falls to $3,000, you have lost $7,000 — more than you put in. You still owe the broker the $5,000 loan, so you would need to deposit an additional $2,000 just to break even.

Interest compounds this problem. The longer you hold a margin loan, the more interest you pay. On a $10,000 loan at 8 percent annual interest, you pay $800 per year. If the stock does not move, you are already down $800 before any market loss. Many margin traders underestimate how much interest erodes their returns, especially in sideways or slowly rising markets.

Brokers also have the right to increase maintenance requirements or raise interest rates without notice, particularly during volatile markets. During the 2008 financial crisis and the 2020 pandemic crash, some brokers raised maintenance requirements from 30 percent to 50 percent or higher, triggering margin calls across thousands of accounts simultaneously.

Who should and should not use margin

Margin trading is a tool for experienced investors who understand leverage and can afford to lose more than they invested. It works best for traders who are actively managing positions, watching their account daily, and ready to act if a margin call arrives. It is also useful for short-term traders who need to borrow shares to short-sell, or for investors who want to use margin strategically for a specific trade and repay it quickly.

Margin is dangerous for buy-and-hold investors, people with limited cash reserves, and anyone who cannot afford to monitor their account regularly. If you cannot afford to deposit $5,000 on short notice to meet a margin call, you should not open a margin account. If your investment strategy is to buy stocks and hold them for years, margin adds cost and risk with no real benefit.

Many financial advisors recommend that retail investors avoid margin entirely. The interest costs and forced-selling risk often outweigh any gains, especially for investors with smaller accounts or longer time horizons.

Margin accounts versus cash accounts

A cash account is the alternative. In a cash account, you can only buy as much stock as you have cash for. There is no borrowing, no interest, and no margin calls. Trades settle in two business days, meaning you cannot use the proceeds from a sale to buy again until the sale is complete. This is slower but much simpler and safer.

Some brokers charge monthly fees for cash accounts, while others offer them free. Margin accounts are often free to open but cost you money through interest. If you are unsure which account type you have, check your account settings or contact your broker — the distinction matters because the rules and risks are completely different.

Frequently Asked Questions

Can I lose more money than I invested in a margin account?

Yes. If you deposit $5,000 and borrow $5,000, a 60 percent stock decline means you have lost $6,000 — more than your initial investment. You would owe the broker $1,000 plus any interest. This is called being "underwater" on margin.

What happens if I cannot meet a margin call?

Your broker will automatically sell shares from your account to raise the required cash. You have no say in which shares are sold, and you still owe any fees. If the sale does not raise enough, you may owe the broker money out of pocket.

How much interest do I pay on a margin loan?

Interest rates vary by broker and loan size, typically ranging from 6 to 12 percent annually. The rate is calculated daily and charged monthly. Larger loans sometimes may have access to for lower rates. Check your broker's current margin rates before opening an account.

Can I use margin to buy any stock?

No. Brokers restrict margin purchases to stocks that meet certain liquidity and price standards. Penny stocks, newly issued shares, and some low-volume stocks cannot be bought on margin. Your broker will tell you which stocks are marginable.

Is margin trading the same as day trading?

No. Margin is a way to borrow money; day trading is a strategy of buying and selling within the same day. You can day trade without margin (using only cash) or use margin without day trading. However, day traders often use margin to control larger positions with less cash.