Margin is borrowed money your broker lends you to control a larger currency position than your account balance would normally allow

When you trade forex, margin is the amount of your own money you deposit with your broker to open and hold a trade. Your broker then lends you additional funds so you can control a much larger position. For example, with 2% margin (a 50:1 leverage ratio), you might deposit $1,000 and control $50,000 worth of currency. The broker holds your $1,000 as security against losses on that larger position.

Margin is not a fee or a cost — it is a deposit. You do not pay interest on margin in most forex accounts, though some brokers charge a small overnight fee if you hold positions across the daily reset. The real cost of margin is the risk: if your trade moves against you, your $1,000 deposit can be wiped out quickly, and you can lose more than you deposited if losses exceed your margin.

Key Takeaways

  • Margin is your broker's requirement that you deposit a percentage of the trade's total value before they will lend you the rest.
  • A margin call occurs when your account balance falls below the minimum the broker requires, and you must deposit more money or the broker will close your positions automatically.
  • Margin amplifies both gains and losses — a small move in the currency pair can wipe out your entire deposit or double it.
  • Different brokers set different margin requirements, typically ranging from 0.5% to 5%, which means leverage ratios from 200:1 down to 20:1.

How margin requirements work in practice

Your broker sets a margin requirement as a percentage of the total trade value. If the requirement is 2%, you must have at least 2% of the position size in your account as a deposit. A standard forex lot is 100,000 units of the base currency. If you want to buy one lot of EUR/USD at a 2% margin requirement, the total notional value is roughly $100,000, so you need $2,000 in your account.

The broker holds that $2,000 and lends you the remaining $98,000 to complete the trade. If the EUR/USD rate moves up 1%, your position gains $1,000 — a 50% return on your $2,000 deposit. If it moves down 1%, you lose $1,000 and your account drops to $1,000. A 2% move against you wipes out your entire margin deposit.

Brokers vary widely on margin requirements. Retail brokers in the United States typically require 2% to 5% margin on major currency pairs. Brokers outside the U.S. often allow 0.5% to 1% margin, which means 100:1 to 200:1 leverage. The lower the margin requirement, the more leverage you control, and the faster your account can be liquidated.

What a margin call is and when it happens

A margin call is a demand from your broker that you deposit more money because your account balance has fallen below the minimum required to hold your open positions. Most brokers set a margin call level at 50% of the initial margin requirement. If your initial margin is 2%, the margin call triggers when your account balance drops to 1% of the position value.

When a margin call occurs, you have two choices: deposit more money immediately, or your broker will close positions automatically — usually starting with your largest losing trades — until your account balance rises above the call level. This automatic closing is called a stop-out or liquidation. You do not get to choose which trades close; the broker does. By the time you see the margin call notification, some positions may already be closed at a loss.

Margin calls happen fast in forex because currency pairs move in small increments and leverage is high. A 1% move against a 100:1 leveraged position wipes out 100% of your deposit. Many traders lose their entire account without ever receiving a margin call notice — the broker closes them out first.

Margin used versus available margin

Your broker's platform shows two margin figures: used margin and available margin. Used margin is the amount of your account balance currently locked up as a deposit on your open positions. Available margin is what remains and what you can use to open new trades or absorb losses on existing ones.

If your account has $10,000 and you open a trade requiring $2,000 margin, you have $2,000 used margin and $8,000 available margin. If that trade loses $3,000, your account drops to $7,000 total. You now have $2,000 used margin (still locked on the open trade) and $5,000 available margin. If the trade loses another $5,000, your account is at $2,000 total, used margin is still $2,000, and available margin is zero — you cannot open any new trades and you are at the margin call level.

Tracking available margin is critical because it is your only buffer against a margin call. Many traders focus on the size of their winning trades and ignore available margin until it is too late.

How margin relates to leverage and risk

Margin and leverage are linked but not the same. Margin is the deposit requirement; leverage is the ratio of borrowed money to your deposit. A 2% margin requirement equals 50:1 leverage. A 1% margin requirement equals 100:1 leverage. The lower the margin percentage, the higher the leverage, and the more risk you take on.

Leverage is advertised heavily because it sounds powerful — "trade with 500:1 leverage" — but it is a warning sign, not a feature. High leverage means your account can be wiped out by a tiny move in the currency pair. A 0.2% move against a 500:1 leveraged position loses 100% of your deposit. Most professional traders use leverage between 10:1 and 20:1 because the risk of total loss is lower and they can survive normal market swings.

Brokers in the United States are required by the Commodity Futures Trading Commission (CFTC) to limit retail traders to 50:1 leverage on major pairs and 20:1 on minor pairs. Brokers in other countries often allow much higher leverage with no such limit, which is why many U.S. traders open accounts overseas — and why many of those traders lose their entire deposit within months.

Margin requirements vary by currency pair and broker

Not all currency pairs have the same margin requirement. Major pairs like EUR/USD, GBP/USD, and USD/JPY typically have the lowest requirements — often 1% to 2% — because they trade in high volume and move predictably. Exotic pairs like USD/ZAR (U.S. dollar to South African rand) or USD/TRY (U.S. dollar to Turkish lira) may require 5% to 10% margin because they are less liquid and more volatile.

Your broker sets the margin requirement, not the exchange. Two brokers can offer different margin on the same pair. A broker offering 0.5% margin on EUR/USD is giving you 200:1 leverage; another offering 2% margin is giving you 50:1 leverage. Lower margin sounds better until your account is liquidated in a market spike.

Some brokers also adjust margin requirements during major economic announcements or market stress. If a central bank is about to announce interest rates, the broker may raise the margin requirement from 2% to 5% to reduce their own risk. If you are holding a position and the requirement rises, you may suddenly face a margin call even though your trade has not moved.

Frequently Asked Questions

Can I lose more money than I deposit with margin?

Yes. If your $1,000 deposit controls a $50,000 position and the currency pair moves 3% against you, your loss is $1,500 — more than your deposit. Your account goes negative and you owe the broker $500. Most brokers close positions before this happens, but during extreme market moves (like the Swiss franc shock in 2015), some traders were left with five-figure debts. Brokers in the U.S. are required to prevent negative balances, but overseas brokers often do not.

What is the difference between initial margin and maintenance margin?

Initial margin is the amount you must deposit to open a trade. Maintenance margin is the minimum you must keep in your account to hold that trade. If your initial margin is 2%, maintenance margin is usually 1% — the margin call level. You must deposit 2% to open, but only 1% to stay open. Once you fall below 1%, the broker closes you out.

Do I pay interest on margin?

Margin itself is not charged interest — it is your own money held as security. However, some brokers charge a small overnight fee (usually 0.01% to 0.05% per day) if you hold a position past the daily reset time, typically 5 p.m. Eastern. This fee is separate from margin and applies to all positions, not just leveraged ones.

Why would I use margin if it is so risky?

Margin allows you to control larger positions with smaller deposits, which means larger gains on winning trades. A 1% move on a 50:1 leveraged position returns 50% on your deposit. Without leverage, that same 1% move returns only 1%. The trade-off is that losses are equally amplified. Most professional traders use moderate leverage (10:1 to 20:1) to capture gains while keeping the risk of total loss manageable.

What happens if my broker goes out of business while I have an open position?

In the U.S., brokers are required to segregate customer funds from company funds, so your margin deposit is protected even if the broker fails. Your positions are transferred to another broker. Outside the U.S., this protection varies widely. Many offshore brokers do not segregate funds, which means your deposit can be lost if the broker fails. This is one reason to use a regulated broker in your home country.