Forex Spreads and Commissions Explained
A trade can be a good idea and still lose money.
That is not always because the market moved in the wrong direction. Trading costs also matter.
Before you place a forex trade, it is important to understand the difference between the buy price and sell price, whether a commission applies and whether there are costs for holding a position over time.
These costs may seem small at first. But they can add up, particularly when trading frequently, using larger positions or holding leveraged products overnight.
Understanding them is part of treating trading as a process rather than simply clicking buy or sell.
What is a forex spread?
The spread is the difference between the price you can buy at and the price you can sell at.
You will usually see two prices quoted for a currency pair:
Bid price — the price available to sell
Ask price — the price available to buy
The difference between those two prices is the spread.
For example, a broker may quote GBP/USD at:
1.2700 / 1.2702
The first price is the bid. The second price is the ask.
The difference is two pips.
If you buy at the ask price and immediately sell at the bid price, you would usually begin with a small loss equal to the spread, before allowing for any other costs.
That is why a trade needs to move sufficiently in your favour before it becomes profitable.
Why spreads exist
The spread is one way trading providers are compensated for facilitating the transaction.
In simple terms, it reflects the difference between the buying and selling price available at that moment.
Spreads can vary depending on:
The currency pair
Market liquidity
The time of day
Economic news or unexpected events
Market volatility
The broker or product being used
Major pairs such as EUR/USD or GBP/USD often have tighter spreads than less actively traded pairs. This is because there are usually more participants and more available liquidity.
Less commonly traded pairs may have wider spreads. That means price may need to move further before a position can overcome the initial cost.
Spreads can widen
A spread is not always fixed.
During normal market conditions, a major currency pair may have a relatively stable spread. But during important economic releases, sudden news or periods of low liquidity, the spread can widen.
This matters because a wider spread increases the cost of entering and exiting a position.
For example, a trade that normally opens with a small spread may suddenly open with a much larger one during a high-impact data release. If you are using a very tight stop loss, that change may have a greater effect on the trade than you expected.
This is another reason why it is useful to understand the market environment before entering a position.
Fast movement is not the only thing to consider. The cost of trading can change too.
What is commission?
A commission is a separate charge that some brokers apply when you open or close a trade.
Some providers offer a spread-only pricing model. Others offer lower spreads but charge a commission for each transaction. The exact structure varies by broker, product and account type.
Neither model is automatically better.
A low advertised spread may look attractive, but it does not tell you the full cost if commission is charged separately. Equally, a wider spread may include the provider’s charge without a separate commission.
The important thing is to understand the total cost.
Before using any product, check:
Whether a commission applies
Whether it is charged when opening, closing or both
How it is calculated
Whether the cost changes with position size
Whether any other charges apply
Do not compare providers using one number alone.
Overnight funding and holding costs
If you use a leveraged product and hold a position overnight, there may be a financing charge.
This is sometimes called overnight funding, rollover or swap.
The exact calculation depends on the product, the currencies involved, the direction of the trade and the broker’s terms. In some cases, the amount may be charged. In other cases, it may be credited. You should never assume one or the other.
These costs are particularly important if you are holding positions for days or weeks.
A trade may appear to be moving in the right direction, but ongoing funding charges can reduce the overall result. This is especially relevant when leverage is involved because the charge may relate to the full exposure of the position rather than just the margin you deposited.
Always read the provider’s product information and check the overnight funding terms before holding a position for longer periods.
Currency conversion and other possible costs
Depending on your account and product, other charges may apply.
These can include:
Currency-conversion charges
Account-management fees
Inactivity or dormancy fees
Platform or data charges
Guaranteed stop-loss premiums, where available
Withdrawal or payment-processing charges
Not every provider charges every type of fee. But this is why it is important to read the full pricing information rather than relying on a headline spread.
If you do not understand a cost, do not ignore it. Find the answer before committing capital.
Costs and short-term trading
Trading more often means paying costs more often.
A trader who enters and exits multiple times each day may pay the spread and any commission on every transaction. Over time, those costs can have a meaningful effect on results.
This does not mean short-term trading is always wrong. It means the process needs to account for the friction involved.
A strategy that only aims to capture very small moves may have less room for error once spreads and commissions are included.
The same applies to emotional overtrading.
Taking unnecessary trades because you are bored, trying to recover a loss or reacting to every small movement can create costs without improving decision quality.
A clear process should include a reason to trade—not just an opportunity to click a button.
Lower cost does not remove risk
It is sensible to understand and compare costs.
But a low spread does not make a trade idea good. A commission-free account does not remove risk. And a tightly priced product can still produce a large loss if the position size is too big or the market moves quickly.
Costs are one part of the process.
Risk management, position size, leverage, market context and discipline still matter more.
The goal is not to find the cheapest possible trade.
The goal is to understand what you are paying, why you are paying it and whether the trade makes sense after those costs are considered.
A simple checklist before you trade
Before placing a trade, ask:
What is the current spread?
Is the spread likely to widen around upcoming news?
Does a separate commission apply?
Will there be an overnight funding cost if I hold this position?
Does my potential reward still justify the total cost and risk?
Am I taking this trade because it fits my plan?
If you cannot answer those questions, pause before entering.
Understanding costs will not guarantee a profitable trade. It will help you avoid being surprised by the basics.
What to learn next
You now understand the key building blocks of a forex trade: market context, price movement, position size, leverage and costs.
The next step is bringing those ideas together into a simple trading plan.
Read next: How to Build a Simple Forex Trading Plan
You may also find these useful:
Forex Leverage Explained: What Beginners Need to Know
Forex Lots and Position Sizing Explained
Risk warning: Forex and leveraged products carry a high level of risk and may not be suitable for everyone. This article is for general educational purposes only and is not personal investment advice. Never trade with money you cannot afford to lose.
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