Margin trading lets you borrow money from your broker to buy more stock than you could pay for outright

When you trade on margin, your broker lends you cash so you can purchase securities — usually stocks or bonds — without having the full amount in your account. You put down a percentage of the purchase price yourself (called the margin requirement), and the broker covers the rest. You pay interest on the borrowed amount, similar to a loan.

The appeal is leverage: a smaller amount of your own money controls a larger position. If the stock price rises, your profit is larger than it would have been with only your own cash. But if the price falls, your losses are also larger — and you still owe the broker the full borrowed amount plus interest, regardless of what the stock is worth.

Margin accounts are offered by most brokerages, but they require a separate agreement and typically a minimum account balance. The Federal Reserve sets broad rules about how much you can borrow, but individual brokers often require more cash down than the minimum.

Key Takeaways

  • Margin is borrowed money from your broker that you use to buy securities, with you paying interest on the loan.
  • Your broker can force you to sell positions or deposit more cash if your account value falls below the maintenance margin requirement.
  • Margin amplifies both gains and losses — a 10% stock price drop can wipe out 50% or more of your own money if you bought on margin.
  • The Federal Reserve sets the initial margin requirement at 50%, but your broker may require 60%, 70%, or higher depending on the security.
  • Interest rates on margin loans vary by broker and account size, and you pay interest whether the stock goes up or down.

How the margin requirement and maintenance margin work

The initial margin requirement is the minimum percentage of a purchase price you must pay with your own money. The Federal Reserve currently sets this at 50% for stocks, meaning you can borrow up to 50% of what you spend. Your broker may require more — 60%, 70%, or even higher — depending on the stock's volatility and liquidity.

The maintenance margin is the minimum percentage of your account value you must keep in cash or securities at all times. This is typically 25% to 30%, though brokers often set it higher. If your account value drops below this level, your broker will issue a margin call — a demand that you deposit more cash or sell securities when ready to bring the account back into compliance. If you do not respond, the broker can sell your positions without your permission to cover the shortfall.

Example: You have $10,000 in your account and buy $20,000 worth of stock using 50% margin. You put down $10,000 and borrow $10,000. If the stock drops to $15,000 total value, your account is now worth $5,000 (the stock value minus what you owe). At a 25% maintenance requirement, you need to hold at least $3,750 in value. You are still above that, so no margin call yet. But if the stock drops to $13,000, your account is worth $3,000, which falls below the $3,750 threshold, and you face a margin call.

Interest costs and how they reduce your returns

Margin is not free. Your broker charges interest on the borrowed amount, and this interest accrues whether your position gains or loses money. Interest rates vary by broker and typically range from 4% to 12% annually, depending on the size of your loan and current market rates. Larger accounts and larger loans often get lower rates.

Interest is usually calculated daily and charged monthly or quarterly. If you borrow $10,000 at 8% annual interest, you pay roughly $67 per month. Over a year, that is $800 in interest costs that reduce your net profit — or increase your net loss if the position declines.

This cost matters most when your returns are modest. If you borrow $10,000 to buy a stock that rises 5% in a year, you gain $500 on the stock but pay $800 in interest, leaving you with a net loss of $300 on borrowed money. You would have been better off not using margin at all.

The amplified risk of losses on margin

Leverage cuts both ways. If you buy $20,000 of stock with $10,000 of your own money and $10,000 borrowed, a 10% drop in the stock price costs you $2,000. But that $2,000 loss is 20% of your original $10,000 — double the percentage loss of the stock itself. A 50% stock price drop wipes out your entire $10,000 and leaves you owing the broker $5,000 plus interest.

Unlike a normal stock purchase where your maximum loss is what you invested, margin trading can result in losses exceeding your account balance. You can end up owing your broker money even after the forced sale of your positions. This is why brokers impose maintenance margin requirements and issue margin calls — to prevent losses from spiraling beyond what the account can cover.

Margin is most dangerous during market downturns, when many investors face margin calls simultaneously. Forced selling by margin traders can accelerate price declines, creating a feedback loop that worsens losses for everyone holding the security.

When brokers force you to sell and what happens next

A margin call is not a request — it is a demand. When your account falls below the maintenance margin threshold, your broker has the legal right to sell your positions without waiting for your approval. Brokers typically give you a few business days to respond, but they are not required to.

The broker will usually sell the positions that are easiest to liquidate (most liquid) first, not necessarily the ones losing the most money. This means you may be forced to sell winners to cover losses, locking in gains you did not intend to realize and creating unexpected tax consequences.

If the forced sale does not raise enough cash to bring your account into compliance, you will owe your broker the difference. Some brokers will pursue collection or freeze your account until the debt is paid. This debt is separate from any tax liability you owe on the gains or losses from the forced sale.

Margin trading versus buying on cash and using options

Margin is one way to control a larger position with less capital, but it is not the only way. Options — contracts that give you the right to buy or sell a security at a set price — also provide leverage and require less upfront cash than buying the stock outright. However, options have their own risks and complexities, and they expire, whereas a margin position can be held indefinitely as long as you maintain the maintenance margin.

Buying stock with cash you already have eliminates interest costs and margin call risk entirely. Your maximum loss is what you invested, and you have full control over when to sell. The trade-off is that you control less total value with the same amount of money.

Many experienced traders use margin strategically for short-term positions and cash for longer-term holdings. Beginners are often advised to avoid margin until they understand both how it works and how much risk they can tolerate.

How margin accounts are set up and what paperwork is involved

Opening a margin account requires signing a separate agreement with your broker beyond the standard brokerage account process. The agreement discloses the interest rate, maintenance margin requirement, and your broker's right to liquidate positions without notice. You will also receive a disclosure statement explaining the risks of margin trading.

Most brokers require a minimum account balance — often $2,000 to $5,000 — before you can trade on margin. Some brokers waive this for certain account types or customer segments. Once approved, you can choose to use margin on individual trades or leave the account in cash mode and only borrow when you decide to.

Your broker will send you monthly or quarterly statements showing your margin balance, interest charges, and current maintenance margin percentage. Tracking this regularly helps you avoid surprise margin calls.

Frequently Asked Questions

Can I lose more money than I invested if I trade on margin?

Yes. If your stock drops 50% and you bought it with 50% margin, your entire investment is gone and you still owe the broker the borrowed half. You can end up owing money after a forced sale. This is why maintenance margin requirements exist — to limit losses, though they do not eliminate the risk of owing money.

What is a margin call and how much time do I have to respond?

A margin call is a demand from your broker to deposit cash or sell securities because your account has fallen below the maintenance margin threshold. Your broker typically gives you a few business days to respond, but they can liquidate your positions without waiting. The exact timeline is in your margin agreement.

Do I pay interest on margin even if my stock goes up?

Yes. Interest accrues on the borrowed amount regardless of whether the position gains or loses. If you borrow $10,000 at 8% annual interest, you owe roughly $67 per month in interest charges. This cost reduces your net profit from the trade.

Is margin trading the same as day trading?

No. Margin is borrowing money to buy securities; day trading is buying and selling the same security within one trading day. You can day trade without margin (using only cash) or use margin for longer-term positions. However, day traders often use margin to control larger positions with less capital.

What happens if I cannot pay back the margin loan?

Your broker will force-sell your positions to cover the debt. If the sale does not raise enough, you will owe the remaining balance. Your broker may pursue collection, freeze your account, or report the debt to credit agencies. This debt is separate from any taxes you owe on the gains or losses from the forced sale.