BROKER RESEARCH · GUIDE
Spread vs commission: what a forex trade really costs
One broker shows a tiny spread and “zero commission”; another quotes a wider spread with a fee attached. Here is how to price the same trade under each, so you compare real cost instead of marketing.
Updated 2026-09-06 · Educational content · No broker owns this site
Quick answer. A spread is the gap between the buy and sell price, baked into every quote; a commission is a separate cash fee. They pay for the same thing, so compare accounts by turning both into one all-in cost per trade, not by the label.
Risk warning. Trading leveraged forex and CFDs carries a high risk of losing money rapidly, and most retail accounts lose money. Trading costs make that harder, not easier: every spread and commission is money you must earn back before a trade breaks even. Nothing here is a recommendation to trade or to pick any particular broker. Never trade with funds you cannot afford to lose.
What is the difference between a spread and a commission?
Every forex quote has two prices. The bid is the price you can sell at; the ask is the price you can buy at. The spread is the gap between them:
ask price − bid price = spread
A commission is different: it is a separate cash fee, charged per lot. You will see it quoted "per side" (one charge to open, one to close) or "per round turn" (the whole open-and-close trade). The spread and the commission are two ways of charging for the same service — giving you access to the market — so the only fair comparison adds them together.
Here is the spread in dollars. Suppose EUR/USD shows a bid of 1.10000 and an ask of 1.10010. The gap is 0.00010, which on EUR/USD is one pip. Buy one mini lot (10,000 units) on a US-dollar account and each pip is worth $1 (10,000 × 0.0001 = $1), so a one-pip spread costs you $1. You begin the trade $1 down, before the price has moved at all. That does not make the trade bad; it means the trade has a cost, and the cost is the same idea whether it arrives as a spread or as a commission.
How do you turn spread and commission into one cost?
Use one formula for every account, and always price the full round turn — a trade is not finished until you close it:
all-in cost = (spread in pips × pip value) + round-turn commission
Work an example on one mini lot of EUR/USD, US-dollar account, where the pip value is $1. On a spread-only account with a one-pip spread and no commission, the all-in cost is 1 × $1 = $1.00. On a raw-spread account, suppose the spread is 0.2 pips and the commission is $0.35 per side. The spread cost is 0.2 × $1 = $0.20, the round-turn commission is $0.35 + $0.35 = $0.70, and the all-in cost is $0.20 + $0.70 = $0.90. The numbers here are illustrative inputs, not any broker’s live pricing — the point is the method, so you can drop your own broker’s figures into the same three lines.
Which is cheaper, a spread or a commission account?
Neither model is always cheaper. The cheaper account is simply the one with the lower all-in cost for the pair you trade, the size you trade, and how often you trade. Put the numbers in a table rather than trusting a slogan. The figures below are hypothetical quotes for one mini lot of EUR/USD — arithmetic to show the method, not live broker pricing and not a recommendation.
On a narrow screen, scroll the table sideways.
| Account type | Quoted spread | Commission | Step by step | All-in cost |
|---|---|---|---|---|
| Spread-only | 1 pip | $0 | 1 × $1 | $1.00 |
| Raw spread + commission | 0.2 pip | $0.35 × 2 sides | 0.2 × $1 + $0.70 | $0.90 |
| Wide spread, no commission | 3 pips | $0 | 3 × $1 | $3.00 |
To see how fragile the ranking is, change a single input. If that raw-spread account charged $1.00 per side instead of $0.35, its all-in cost becomes $0.20 + $2.00 = $2.20 — and now the plain one-pip spread-only account, at $1.00, is the cheaper of the two. That is the whole lesson: the label ("raw", "ECN", "zero commission") tells you how you are charged, never how much. Only the all-in number does that.
Why can a low spread still be expensive?
Because the advertised spread is only one line of the bill. A tight spread can still be the expensive choice once the commission, overnight financing, slippage, or a minimum fee is added in. Know the four costs and where each one hides:
| Cost | Where you see it | Why it matters |
|---|---|---|
| Spread | Inside the bid and ask price | Paid the moment you cross it, on every trade. |
| Commission | A separate fee line on the ticket | Adds to the spread cost; use the round-turn figure. |
| Swap | An overnight adjustment to the position | Charged or paid when you hold past the daily rollover. |
| Slippage | Expected price vs the price you actually filled at | Can grow in fast or thin markets, especially around news. |
So do not rank brokers by the lowest "from 0.0 pips" headline. Ask the sharper question: what is the average spread on the pair I trade, during the hours I trade, after commission — and what does it cost me to hold overnight if I do? A demo account is the cheapest place to watch those live spreads widen and settle before a cent is at risk.
Does your trading style change which cost matters most?
Yes, and it is the difference between a rounding error and a real drag. Short-term traders cross the spread far more often, so spread and commission dominate their costs; longer-horizon traders hold positions for days, so swap and holding costs matter more to them.
Picture two traders on the same EUR/USD mini-lot setup at $1 a trade. Trader A takes one trade a week: the $1 is trivial against a 50-pip ($50) stop. Trader B takes 20 trades a week: that is 20 × $1 = $20 in cost, and against a 10-pip ($10) stop each $1 cost is a tenth of the risk on the trade. Same pair, same spread — very different pressure. This is why cost discipline matters most for scalping and heavy trading; it is not a reason to hold longer, because holding adds swap and larger price swings of its own.
How should a beginner compare account costs?
Turn every cost into dollars for one identical trade, then compare the totals. Hold the pair, the size, and the round turn constant so nothing hides:
- Pick one pair — EUR/USD is easiest, because the pip value on a US-dollar account is a clean $1 per mini lot.
- Pick one size — one mini lot (10,000 units).
- Write down the average spread in pips (watch it live on a demo, not the "from" number in the advert).
- Convert the spread to dollars, then add the round-turn commission.
- Add the expected swap only if you plan to hold overnight.
- Compare the final dollar figures — lowest all-in cost wins.
If a broker will not show its spreads and commissions plainly, treat that as the answer and read the account documents before funding anything. Costs are not a footnote to the regulators either: the mandatory "percentage of retail accounts that lose money" line every UK broker must display counts an account as losing only after all costs, fees and commissions are netted out (FCA COBS 22.5). In other words, the official measure of who loses already treats cost as part of the result. Cost sits alongside the checks in how to choose a forex broker and what broker regulation actually protects; regulation comes first, cost second. To size each trade to a fixed risk once you have chosen, use a position size calculator rather than guessing.
Common mistakes beginners make
- Reading "commission-free" as "cost-free". A zero-commission account is still paid — through a wider spread. Price it and see.
- Comparing raw spreads without adding the commission. A 0.2-pip spread looks unbeatable until the fee lands on top of it.
- Mixing up mini and standard lots. On EUR/USD a pip is about $1 on a mini lot but about $10 on a standard lot — a tenfold error in your cost maths.
- Chasing the "from 0.0 pips" headline. "From" is the best case in the quietest minute, not what you will average.
- Forgetting the cost repeats. A $1 cost is $20 over 20 trades and $100 over 100 — and a lower cost never rescues a position that is simply too large.
Frequently asked questions
Is a spread or a commission better in forex?
Neither is automatically better. A spread-only account is simpler because the cost is built into the quote, but it can be dearer if the spread is wide. A commission account can be cheaper when the spread is tight and the fee is low. Compare the all-in dollar cost, not the label.
Why do brokers offer zero-commission accounts?
A zero-commission account is still paid — usually through a wider bid-ask spread instead of a separate fee. That can be perfectly fair as long as the total cost is clear. It becomes a trap only when a beginner reads “zero commission” as “zero trading cost” and stops checking the spread.
How do I calculate the spread cost on EUR/USD?
Multiply the spread in pips by the pip value. On a US-dollar account, one mini lot of EUR/USD is worth about $1 per pip, so a one-pip spread costs about $1 and a three-pip spread about $3. This clean $1 holds because USD is the quote currency; other pairs differ.
What is a round-turn commission?
It is the full commission for opening and closing one position. If an account charges $0.35 per side on a mini lot, the round turn is $0.70. Always budget with the round-turn figure, because a trade is not finished — and not fully paid for — until it is closed.
Should a beginner choose an ECN account?
Not just because the name sounds professional. An ECN-style account can be cheaper, but only after you add its commission to its tighter spread and compare the total against a simple spread-only account. Check regulation first, then compare all-in cost; the label alone proves nothing.
Sources
- FirstPip knowledge base — note broker-types-execution-models (internal; secondary sources S012/S013). Used only for the mechanism that true cost is spread plus commission, no figures published.
- CFTC — Customer Advisory: Foreign Currency (forex) Trading; what retail customers need to know about costs and risks
- FCA — PS19/18: Restricting contract for difference products sold to retail clients (mandatory standardised risk warning; a losing account is defined after all costs, fees and commissions — COBS 22.5)
- ESMA — Product intervention measures on CFDs (standardised risk warning and cost/loss disclosure for retail CFDs, 2018)