A margin account lets you borrow money from your broker to buy stocks or other securities
A margin account is a brokerage account where you can borrow cash from your broker to purchase investments. Instead of paying the full price upfront with your own money, you put down a percentage of the cost yourself and borrow the rest. The securities you buy sit as collateral for the loan.
This is different from a standard cash account, where you can only buy what you have money for. A margin account gives you the ability to control a larger investment position than your cash balance alone would allow. The tradeoff is that you pay interest on the borrowed amount and face specific rules about how much you can borrow and what happens if your account value drops.
Margin accounts are offered by most major brokers—Fidelity, Charles Schwab, E-Trade, Interactive Brokers, and others. They are not the same as a line of credit against your home or a personal loan, though they serve a similar function: they let you access money you do not currently have to make a purchase.
Key Takeaways
- A margin account requires you to deposit a minimum amount (often $2,000 to $25,000 depending on your broker) before you can borrow.
- Your broker will lend you up to 50 percent of the purchase price of stocks under Federal Reserve rules, though some brokers allow higher percentages for experienced traders.
- You pay interest on the borrowed amount, typically ranging from 4 to 12 percent annually depending on the size of your loan and current market rates.
- If the value of your holdings drops below a certain threshold, your broker can force you to deposit more cash or sell positions without asking your permission—called a margin call.
- Margin accounts are riskier than cash accounts because losses are magnified when you borrow money to invest.
How much you can borrow depends on federal rules and your broker's policies
The Federal Reserve sets the baseline for how much you can borrow in a margin account. Under Regulation T, you must put down at least 50 percent of the purchase price yourself for stocks. That means your broker can lend you up to 50 percent. Some brokers allow you to borrow more for certain securities or if you have a larger account balance and trading history, but 50 percent is the federal floor.
Before you can borrow at all, you must meet your broker's minimum deposit requirement. This varies: some brokers require $2,000, others $10,000, and some require $25,000 or more. Once you meet that minimum, you can borrow against the value of securities already in your account, not just new purchases.
Your broker also sets a maintenance requirement—the minimum account value you must keep at all times. This is usually 25 to 30 percent of the total value of your positions. If your account drops below that level, your broker can issue a margin call.
Interest charges and how they accumulate
When you borrow on margin, you pay interest to your broker on the borrowed amount. The rate varies by broker and by how much you have borrowed. Rates typically range from 4 to 12 percent per year, though they can go higher in volatile markets or if you borrow a large amount relative to your account size.
Interest is usually calculated daily and charged monthly to your account. If you borrow $10,000 at 8 percent annual interest, you would owe roughly $67 per month in interest charges alone. That cost comes out of any profits you make, or adds to your losses if the investment declines.
Some brokers offer lower rates if you maintain a larger balance or if you borrow less. It is worth comparing rates across brokers before opening a margin account, because the difference between 5 percent and 10 percent can be substantial over time.
What a margin call is and what happens when one occurs
A margin call happens when the value of your account falls below your broker's maintenance requirement. If you borrowed $10,000 to buy stocks and those stocks lose value, your account equity shrinks. When it drops too far, your broker sends you a notice demanding that you either deposit more cash or sell positions to bring the account back into compliance.
You typically have a few days to respond—often two to five business days, depending on your broker. If you do not act, your broker can sell your positions without your permission to raise the cash needed. This forced liquidation can lock in losses and may happen at the worst possible time in the market.
Margin calls can happen quickly in volatile markets. A 20 percent drop in your holdings can easily trigger one if you are borrowing near the maximum. This is why margin accounts are considered high-risk: you can lose more than you invested if the market moves sharply against you.
The risks of borrowing to invest
Margin amplifies both gains and losses. If you invest $10,000 of your own money and the investment rises 20 percent, you make $2,000. But if you borrow $10,000 and invest $20,000 total, a 20 percent gain nets you $4,000—minus interest costs. The reverse is also true: a 20 percent loss on a $20,000 position costs you $4,000, which may be more than your initial $10,000 deposit.
In extreme cases, losses can exceed your initial investment. If you borrow heavily and the market crashes, you could owe your broker money even after your positions are liquidated. This happened to many traders during the 2008 financial crisis and during the March 2020 market panic.
Margin accounts also require active monitoring. You cannot simply buy and hold without watching your account value. A sudden market drop can trigger a margin call that forces you to act immediately, often at the worst time.
When a margin account makes sense and when it does not
Margin accounts are most useful for experienced traders who understand leverage and monitor their positions daily. They can be valuable for short-term trading strategies, for hedging existing positions, or for investors who want to increase exposure to a particular security they believe in.
Margin accounts are generally not appropriate for buy-and-hold investors, beginners, or anyone who cannot afford to lose more than their initial investment. If you are saving for retirement or building wealth over decades, a cash account is safer and simpler. The interest costs and margin call risk usually outweigh any benefit.
Some investors use margin strategically—borrowing only a small percentage of their account value to reduce risk. Others avoid it entirely. The decision depends on your experience, risk tolerance, and investment goals.
How to open a margin account and what paperwork is involved
Opening a margin account is straightforward. When you sign up with a broker, you can usually request a margin account during the account setup process. Your broker will ask you to sign a margin agreement that outlines the terms, interest rates, and your obligations.
The broker will also ask about your investment experience and income to assess whether margin is appropriate for you. This is partly a regulatory requirement and partly the broker's own risk management. Some brokers may decline to offer margin to new or inexperienced traders.
Once approved, you will need to deposit your broker's minimum amount before you can borrow. After that, you can borrow up to your limit whenever you place a trade. Your broker's platform will show your available margin—the amount you can still borrow—at all times.
Frequently Asked Questions
Can I lose more money than I invested in a margin account?
Yes. If you borrow heavily and the market moves sharply against you, losses can exceed your initial deposit. Your broker can force you to cover the difference, and in rare cases you could owe money after your positions are sold.
What is the difference between a margin account and a line of credit?
A margin account is specific to investing—you borrow to buy securities, and those securities are your collateral. A line of credit is more flexible; you can use the money for anything. Margin also has federal borrowing limits and maintenance requirements that lines of credit do not.
Do I have to use all my available margin?
No. You can borrow as little or as much as you want up to your limit. Many traders borrow only a small percentage of their available margin to reduce risk and avoid margin calls.
What happens to my margin account if the stock market crashes?
Your account value drops along with the market. If the drop is large enough, you will receive a margin call and must deposit cash or sell positions immediately. This can force you to lock in losses at the worst possible time.
Can my broker change the interest rate on my margin loan?
Yes. Most brokers reserve the right to adjust margin interest rates based on market conditions and the Federal Reserve's rate changes. Your broker should notify you of changes, but rates are not fixed.