Futures margins: How margin requirements work before you place a trade

When you open a futures position, your broker asks you to set aside a small amount of money as a deposit — proof that you can cover losses if the trade goes against you. That deposit is called futures margin, and it acts as a good faith deposit between you, your broker, and the exchange.

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Think of it like a security deposit on an apartment. You don't lose it just by moving in, and you get it back when you leave — minus any damages. Futures margin works the same way: it sits in your account as collateral and is returned when you close the trade, adjusted for any gains or losses.

The futures margin requirement is typically between 3% and 12% of the futures contract's total value. So if you're trading a futures contract worth $100,000, you might only need to post $3,000–$12,000 to open the position.

That deposit is also what makes leverage possible. You only put up a fraction of what the trade is worth — and that means both your gains and your losses are amplified. A small move in the market can mean a big swing in your account.

This guide explains how futures margin works, how it differs from borrowing money to trade stocks, the four types of margin you'll encounter, and what happens if your account falls below the required level.

The word "margin" means something very different depending on whether you're trading stocks or futures.

With stocks, margin is a loan. Your broker lends you money to buy shares and charges you interest until you pay it back. You can borrow up to 50% of the stock's value — so to buy $10,000 worth of stock, you need at least $5,000 of your own money. That's a maximum of 2:1 leverage.

With futures, there is no loan and no interest. You're not borrowing anything. You're simply setting aside a portion of your own money as a good faith deposit to show you can cover potential losses. When you close the futures contract, that collateral comes back to you.

This is why futures offer far higher leverage than stocks. Because you're posting a risk-based deposit rather than taking out a loan, the futures margin requirement can be as low as 3–12% of the notional value. On a $100,000 futures contract, you might only need $5,000 in margin — that's 20:1 leverage. Compare that to stocks, where the rules cap you at 2:1. The same $5,000 in a stock margin account buys you $10,000 worth of shares. In futures, that same $5,000 controls $100,000 worth of exposure.

That difference cuts both ways. Higher leverage means bigger potential gains — but it also means losses can pile up just as fast. A 5% move against you in stocks with 2:1 leverage costs you 10% of your capital. The same 5% move in futures with 20:1 leverage wipes out your entire deposit.

The simplest way to think about it: stock margin is a credit card. Futures margin is a security deposit — and a much smaller one.

Margin requirements exist for three reasons: to manage risk, to enable leverage, and to keep markets stable.

Risk management. Every futures trade has two sides — a buyer and a seller. Both are required to post margin. This ensures that if the trade moves against either party, there are funds available to cover the loss. Without it, traders could open futures positions they can't afford to lose, putting the entire market at risk.

Leverage. Futures margin is what makes leverage possible. By only requiring a small good faith deposit to control a large position, futures let you put your capital to work more efficiently. Here's a concrete example: Bitcoin is trading at $100,000. You open a one-BTC perpetual futures contract and post $5,000 in margin. You now control $100,000 worth of Bitcoin with just $5,000. If Bitcoin moves up $10,000, you make $10,000 on a $5,000 deposit. If it moves down $10,000, you lose $10,000 — more than you put in. That's the power and the risk of leverage.

Margin and leverage are not the same thing. Margin is the deposit you post. Leverage is how much exposure that deposit gives you. Post $5,000 to control a $100,000 futures contract and your leverage is 20:1. When exchanges raise margin requirements, they are directly reducing how much leverage traders can take on — which is one of the main tools they use to calm markets during periods of high volatility.

Market stability. When all traders are required to hold adequate margin, it reduces the risk of a chain reaction. If one trader can't cover their losses, it shouldn't affect everyone else. Margin requirements are what keep that from happening.

There are four margin figures you'll come across when trading futures. Each one applies at a different moment, and mixing them up is one of the most common reasons new traders get caught off guard.

Initial margin is what you post to open a futures position. It's the full good faith deposit required by the exchange — think of it as the entry ticket.

Maintenance margin is the minimum your account balance can fall to before you're in trouble. It sits just below the initial margin — typically around 90% of it. If your balance drops below this level due to mark-to-market losses, your broker issues a margin call and you'll need to top your account back up to the full initial margin requirement, not just the maintenance level.

Day trading margin is a reduced margin requirement your broker offers for positions you open and close within the same session. It can be significantly lower than the exchange requirement — sometimes just a few hundred dollars per contract. The catch is that if you're still holding the position when the session closes, the day trading margin disappears and the full overnight margin kicks in immediately.

Overnight margin is the full exchange-set requirement for holding a futures position past the session close. It's the same as the initial margin in most cases. If you plan to hold overnight, this is the number to plan around — not the day trading margin.

Futures margin requirements are not fixed — they move with the market. Three things drive the changes:

Volatility. When markets get choppy, exchanges can raise margin requirements to protect the clearinghouse. When things calm down, requirements may come back down. Brokers can also add house requirements on top of exchange minimums during periods of elevated risk.

Contract size. A standard futures contract carries a larger margin requirement than a micro version simply because the notional value is bigger. The percentage may be similar, but the dollar amount scales with the size of the contract.

Daily mark-to-market. Futures positions are settled every day. Gains are credited to your account; losses are debited. A string of losing sessions can quietly erode your margin buffer even if no single move felt dramatic — which is why it pays to keep a buffer above the maintenance margin rather than running your account equity right to the edge.

A margin call is triggered when your account equity falls below the maintenance margin level after mark-to-market losses. It is the system signaling that your buffer is gone and you need to act.

How to satisfy a margin call

You have three options:

1. Deposit additional funds to bring your account back up to the initial margin requirement — not just to the maintenance margin level.

2. Reduce your position by closing some futures contracts, which lowers the total margin required.

3. Wait for the market to move in your favor — but this is the riskiest path and should not be relied on.

Acting quickly matters. Margin calls often come with short deadlines, sometimes within the same business day.

When brokers liquidate positions

If a margin call goes unmet, your broker can force a liquidation of your positions to bring the account back in line. This can mean a partial close, a full close, or position-closing-only restrictions that block new trades. During fast-moving sessions, forced liquidation can happen quickly and without warning — which is exactly why experienced traders keep a margin buffer rather than running their account equity close to the maintenance margin threshold.

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