What Is Free Margin? Meaning, Formula & Examples (2026)

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Updated on July 18, 2026

Free margin is one of the most important concepts in leveraged trading, yet it is often misunderstood by beginners.

Simply put, free margin is the portion of your account equity that is not currently being used as margin for open trades. It represents the funds that remain available to open new positions or to absorb temporary market losses without triggering a margin call.

Whenever you open a leveraged trade, your broker sets aside part of your account as used margin. The remaining equity becomes your free margin.

As long as you have sufficient free margin, your account has room to withstand normal market fluctuations. However, if your free margin falls to zero, your account becomes much more vulnerable to margin calls and stop-outs if losses continue to increase.

Understanding free margin is essential because it directly affects your trading flexibility, your ability to manage risk, and the number of positions you can safely maintain.

If you’re new to leveraged trading, it’s recommended to first read our guides on What Is Margin in Trading?, What Is Leverage in Trading?, and What Is a Margin Call?, These concepts are closely connected.

Table of Contents

Quick Answer

Free margin is the amount of your account equity that remains available after subtracting the margin currently used for open positions.

It can be used to:

Open additional trades.
Absorb floating losses.
Reduce the likelihood of a margin call.
Provide flexibility during volatile market conditions.

The higher your free margin, the healthier and more flexible your trading account generally is.

Once you’ve mastered the basics of Free Margin, compare the Free Margin requirements offered by different platforms in our Best Forex Brokers guide, and you should take a look at the best brokers in 2026

Free Margin at a Glance

Feature	Description
Definition	Equity not currently locked as margin
Used For	Opening new trades and absorbing losses
Changes Constantly	Yes
Increases When	Equity rises or positions are closed
Decreases When	Losses increase or more positions are opened
Related To	Margin, Used Margin, Equity, Margin Level
Important For	Risk management and account flexibility

Why Is Free Margin Important?

Free margin acts as the financial cushion of your trading account.

It provides the flexibility needed to handle normal price movements without immediately putting your account at risk.

A healthy free margin allows you to:

Open new trading positions when opportunities arise.
Withstand temporary market fluctuations.
Reduce the likelihood of receiving a margin call.
Avoid automatic position closures caused by stop-outs.

On the other hand, if your free margin becomes very low, your account has little capacity to absorb additional losses. Even a relatively small adverse price movement can significantly increase the risk of broker intervention.

For this reason, experienced traders monitor their free margin just as closely as they monitor profits and losses.

How Is Free Margin Calculated?

Free margin is calculated using a simple relationship between your account equity and the margin currently being used for open positions.

Formula:

Free Margin = Equity − Used Margin

This means that:

If your equity increases because your trades become profitable, your free margin also increases.
If your equity decreases due to floating losses, your free margin decreases.
Opening additional positions increases your used margin, which also reduces your available free margin.

Although the calculation is straightforward, understanding how these values interact is essential for effective risk management.

Example of Free Margin

Imagine the following trading account:

Account Information	Value
Balance	$5,000
Equity	$5,000
Used Margin	$1,500

Your free margin would be:

$5,000 − $1,500 = $3,500

This means you still have $3,500 available to support existing trades or open additional positions.

Now suppose one of your positions incurs a floating loss of $800.

Your account would look like this:

Metric	Value
Balance	$5,000
Equity	$4,200
Used Margin	$1,500
Free Margin	$2,700

Even though your account balance hasn’t changed, your free margin has decreased because your equity has fallen.

This demonstrates why the free margin changes continuously as market prices fluctuate.

What Affects Free Margin?

Free margin is not a fixed value.

It changes continuously while the market is open because it depends on both your account equity and the amount of margin currently being used.

Several factors can increase or decrease your free margin throughout the trading day.

1. Floating Profit

When your open trades move in your favor, your account equity increases.

Since the used margin usually remains the same, the increase in equity results in a higher free margin.

For example:

Account Metric	Before Profit	After Profit
Equity	$5,000	$5,600
Used Margin	$1,500	$1,500
Free Margin	$3,500	$4,100

A profitable trade gives your account more flexibility and increases your ability to open additional positions.

2. Floating Loss

The opposite happens when the market moves against your positions.

As losses increase, your equity decreases, reducing your available free margin.

For example:

Account Metric	Before Loss	After Loss
Equity	$5,000	$4,200
Used Margin	$1,500	$1,500
Free Margin	$3,500	$2,700

If losses continue, your free margin may eventually reach zero, increasing the risk of a margin call.

3. Opening New Positions

Every new leveraged trade requires additional margin.

As your broker reserves more funds for new positions, your used margin increases.

Since:

Free Margin = Equity − Used Margin

Your free margin decreases whenever you open additional trades.

This is why experienced traders avoid opening too many positions simultaneously.

4. Closing Positions

Closing an open position releases the margin that was reserved for that trade.

As a result, your used margin decreases, and your free margin generally increases.

If the position is profitable, your equity may also increase, giving your account even more available margin.

5. Depositing Additional Funds

Adding money to your trading account increases your account balance and, consequently, your equity.

This immediately increases your free margin and provides a larger safety buffer against future market fluctuations.

How Free Margin Changes During a Trade

Let’s look at a complete trading example.

Step 1: Before Opening a Trade

Account Information	Value
Balance	$10,000
Equity	$10,000
Used Margin	$0
Free Margin	$10,000

Since there are no open trades, all available funds are free margin.

Step 2: Open a Leveraged Position

Suppose your broker reserves $2,000 as margin.

Account Metric	Value
Equity	$10,000
Used Margin	$2,000
Free Margin	$8,000

Your account is still healthy, but part of your equity is now committed to supporting the open trade.

Step 3: The Trade Moves Into Profit

Your floating profit reaches $700.

Account Metric	Value
Equity	$10,700
Used Margin	$2,000
Free Margin	$8,700

Notice that your free margin has increased even though your used margin hasn’t changed.

Step 4: The Market Reverses

Instead of a profit, imagine your trade now has a floating loss of $1,500.

Account Metric	Value
Equity	$8,500
Used Margin	$2,000
Free Margin	$6,500

The account still has available free margin, but continued losses could eventually trigger a margin call.

Free Margin vs Used Margin

Although they are closely related, free margin and used margin represent two completely different parts of your trading account.

Free Margin	Used Margin
Available funds	Reserved funds
Can absorb losses	Supports open positions
Can be used to open new trades	Cannot be used elsewhere until trades are closed
Changes with equity and open positions	Changes mainly when positions are opened or closed
Higher is generally better	Should remain at a manageable level

A simple way to remember the difference is:

Used Margin is money currently committed to keeping your trades open.
Free Margin is money that remains available for future trading opportunities or unexpected market movements.

We’ll compare these two concepts in greater detail in our dedicated guide, Free Margin vs Used Margin.

Common Mistakes Related to Free Margin

Many traders misunderstand free margin, leading to unnecessary risk and avoidable losses.

Some of the most common mistakes include:

Using All Available Free Margin

Just because your account allows you to open another position doesn’t mean you should.

Using nearly all available free margin leaves little room for normal market fluctuations.

Ignoring Floating Losses

Some traders focus only on their account balance.

However, free margin depends on equity, not balance.

Large floating losses can dramatically reduce your free margin even if your account balance hasn’t changed.

Opening Too Many Trades

Opening several leveraged positions at once rapidly consumes available free margin.

If markets become volatile, the account may approach a margin call much sooner than expected.

Confusing Balance With Free Margin

Many beginners believe their balance represents the money available for trading.

In reality, free margin—not account balance—determines how much additional market exposure your account can safely support.

Trading Without Monitoring Margin Level

Free margin and margin level work together.

Monitoring only one while ignoring the other can lead to poor risk management decisions.

Professional traders regularly check both values before opening new positions.

Best Practices for Managing Free Margin

Maintaining a healthy free margin is one of the foundations of successful leveraged trading.

Rather than trying to maximize the number of trades you can open, professional traders focus on maintaining enough available funds to handle unexpected market movements.

The following best practices can help you protect your trading account.

Keep a Healthy Free Margin Buffer

One of the simplest ways to reduce trading risk is to avoid using all of your available margin.

Leaving a comfortable amount of free margin allows your account to withstand temporary losses without immediately approaching a margin call.

Think of free margin as your account’s emergency reserve rather than unused money waiting to be invested.

Use Appropriate Position Sizes

Every position you open consumes part of your available margin.

Opening positions that are too large can quickly reduce your free margin and increase overall account risk.

Before entering any trade, calculate your position size based on your account balance and acceptable level of risk instead of using the maximum size your broker allows.

Monitor Equity Instead of Balance

Many beginners make the mistake of watching only their account balance.

However, free margin is based on equity, which includes your floating profits and losses.

A large unrealized loss can significantly reduce your free margin even though your account balance has not yet changed.

Always pay attention to your equity while trades are open.

Avoid Overleveraging

High leverage reduces the amount of margin required to open a trade, making it easier to open larger positions.

While this may seem attractive, it can also cause your free margin to disappear much more quickly when the market moves against you.

Using moderate leverage provides greater flexibility and reduces the likelihood of margin calls.

Review Your Margin Before Opening New Trades

Before opening another position, ask yourself:

How much free margin will remain?
Can my account survive a temporary adverse market movement?
Am I risking too much by increasing my exposure?

If the answer to any of these questions is uncertain, it may be better to wait rather than open another trade.

FAQ

What is free margin in simple terms?

Free margin is the amount of money in your trading account that is available for opening new positions or absorbing market losses.
It is the portion of your equity that is not currently being used as margin for open trades.

Is free margin the same as account balance?

No.
Your account balance reflects the money in your account after all closed trades.
Free margin depends on your current equity and changes continuously while your trades remain open.

Can free margin become negative?

Under normal trading conditions, free margin generally does not remain negative.
If your account approaches zero free margin, your broker may issue a margin call or begin closing positions according to its stop-out policy.

Is a higher free margin better?

Generally, yes.
A higher free margin provides greater flexibility, allows your account to absorb temporary losses, and reduces the likelihood of margin calls.
However, maintaining a high free margin should be part of an overall risk management strategy rather than the sole objective.

How can I increase my free margin?

You can increase your free margin by:
Closing open positions.
Depositing additional funds.
Reducing leverage.
Opening smaller positions.
Allowing profitable trades to increase your equity.

Final Thoughts

Free margin is one of the most important indicators of your trading account’s health.

It represents the capital available to support your existing positions, absorb market fluctuations, and take advantage of new trading opportunities.

Successful traders do not focus solely on profits—they also monitor their available free margin to ensure their accounts remain financially stable during both calm and volatile market conditions.

Understanding how free margin interacts with equity, used margin, leverage, and margin level will help you make better trading decisions and reduce the likelihood of margin calls or stop-outs.

Instead of viewing free margin as unused capital, think of it as an essential safety buffer that gives your trading strategy room to operate effectively.

Continue Learning

Build your understanding of leveraged trading with these related guides:

Margin & Leverage

What Is Leverage in Trading?
What Is Margin in Trading?
What Is a Margin Call?
What Is a Stop-Out Level?
What Is Used Margin?
Free Margin vs Used Margin
What Is Margin Level?
How to Calculate Margin Level

More Guides

Trading Tools

Best Brokers

Authors

Fernando Reyes: Checker
Fernando Reyes is a dedicated trading platform checker and analyzer with a sharp eye for detail and a deep understanding of the online trading ecosystem. With years of experience evaluating forex, crypto, binary options, and multi-asset brokers, Fernando has built a trusted reputation for delivering honest, data-driven, and user-focused platform reviews.

Mateo Hernández: Reviewer
Mateo Hernández is a dedicated trading platform reviewer known for his thorough, unbiased, and detail-oriented evaluations of online brokers and trading solutions. With extensive hands-on experience across forex, crypto, CFD, and binary options platforms, Mateo has built a strong reputation for delivering accurate, transparent, and trader-focused reviews.