8 min read Every trade carries three costs, and most traders notice only one. The spread is the gap between the buy and sell price. The commission is a flat fee some accounts charge per trade. The swap is what you pay, or earn, to hold a position overnight. What decides your real cost is the all-in total, not any single piece of it.
The three costs, in plain terms
Before comparing them, it helps to see exactly what each one is and when you pay it.
Spread. The difference between the bid (where you sell) and the ask (where you buy), built straight into the price. You pay it the moment you enter, because you buy at the higher ask and can only sell back at the lower bid. Every account has a spread. It’s the one cost you can’t switch off. If the idea is new, start with what a spread actually is, or the forex spread in detail.
Commission. A flat fee charged per lot, usually on raw or ECN-style accounts that show near-zero spreads in exchange. It’s typically billed round-turn (entry plus exit) and often lands somewhere around $3 to $7 per lot in the wider market. Spread-only accounts fold this into the spread instead and charge no separate commission.
Swap. An overnight financing charge, also called rollover. Hold a leveraged position past the daily cut-off (around 5 p.m. New York time) and you either pay or receive a swap, set by the interest-rate difference between the two currencies in the pair. It can be a charge or a credit, and it repeats every night you stay in.
The all-in cost formula
Put the three together and the real cost of any trade looks like this:
Total cost = (spread × pip value × lots) + (commission, round-turn) + (daily swap × nights held)
Numbers make it concrete. Say you open one standard lot of EUR/USD, where a pip is worth about $10, and hold it three nights.
On a raw-spread account with a 0.2-pip spread and a $7 round-turn commission, paying a swap of about $2.50 a night: the spread costs $2, the commission costs $7, and the swap costs $7.50. Total: $16.50. On a spread-only account with a 1.2-pip spread, no commission, and the same swap: the spread costs $12, commission is nothing, swap is $7.50. Total: $19.50. Same trade, $3 apart, and the gap only grows as you add lots. (All figures here are illustrative; live numbers vary by market and platform.)
The lesson isn’t which account won this example. It’s that the headline number, the one most platforms advertise, is never the whole cost.
Spread-only vs raw spread plus commission
That example points at the real decision behind the cost: which pricing model fits how you trade. There are two, and the choice can quietly decide your bottom line.
A spread-only account rolls every cost into one wider spread. You see a single number, there’s no commission to track, and a long-term position pays it once. A raw spread plus commission account shows the near-raw market spread and charges a fixed fee per lot on top. You pay more attention, but the market price stays clean and the cost is predictable even when spreads wobble.
| Spread-only | Raw spread + commission | |
|---|---|---|
| What you pay | One wider spread | Near-raw spread + flat fee per lot |
| Cost visibility | One number, less transparent | Market price and fee shown separately |
| Best for | Lower-frequency, longer holds | High-frequency, large volume |
| In volatility | Cost rises with the spread | Fee fixed, only the raw spread moves |
The break-even sits near a single pip. A $7 round-turn commission is worth roughly 0.7 of a pip on a standard lot, so add a 0.2-pip raw spread and the raw account costs about 0.9 pip all-in. Beat that with a spread-only account quoting under roughly a pip and spread-only wins; sit above it and the commission model pulls ahead. The more often you trade and the larger your size, the more decisively raw plus commission tends to win, which is why active and high-frequency traders gravitate to it. This is also the angle the way brokers make money turns on, and it sits next to the separate question of fixed vs floating spreads, which is about how the spread behaves rather than how it’s billed.
Where swap hides
Spread and commission hit you at the moment you trade. Swap is different: it’s a time cost, and it ambushes traders who only budgeted for the entry. Hold for one night and it’s a rounding error. Hold for weeks and it can quietly become the largest line on the trade, sometimes larger than the spread that got you in.
Two details catch people out. First, swap can run either way: hold a higher-yielding currency against a lower-yielding one and you might earn a small credit; hold it the other way and you pay. Second, most pairs charge a triple swap on Wednesday to cover the weekend’s financing in advance, so a position carried through midweek costs three times the usual night. Swing and position traders feel all of this; a scalper closing out by the afternoon barely meets swap at all.
Which cost matters most for your style
You don’t need to minimise all three equally. The one that dominates depends entirely on how long you hold.
| Trading style | Dominant cost | What to optimise |
|---|---|---|
| Scalping / day trading | Spread + commission | Tightest all-in entry cost |
| Swing trading | Swap, then spread | Overnight rates, holding period |
| Position / long-term | Swap | Swap rates, pair selection |
A scalper opening dozens of trades a day lives and dies on the spread and commission, because they pay it again on every round trip and never hold long enough to meet a swap. A swing trader flips the priorities: a wider entry spread barely registers across a multi-week hold, but three or four nights of swap, with a triple charge somewhere in the middle, adds up. A long-term position trader can watch swap dwarf the original spread entirely. Knowing which trader you are tells you which cost to attack first.
How to cut your total trading cost
None of these costs disappear, but each one bends.
Trade liquid markets in their busy hours, where spreads are tightest; the assets with the tightest spreads are the most heavily traded ones. Match the pricing model to your volume: spread-only for lower-frequency trading, raw plus commission once you’re active enough that the math flips. Mind the calendar if you hold overnight, and avoid carrying a costly-swap position through Wednesday without reason. And don’t forget the cost that isn’t on the menu: slippage, where a fast market fills you worse than the screen showed, stacks on top of everything else, and slippage grows with volatility just as spreads do. Bigger leverage multiplies the cash value of all of it, since a larger position pays a larger spread, commission, and swap.
The habit that ties it together is simple: compare the all-in cost, not the advertised one. Trade forex, gold, indices, and crypto on PrimeXBT from one account, or see how the platform structures its spreads.
Trading involves risk.
What is the difference between spread and commission?
The spread is built into the price: you pay it automatically by buying at the ask and selling at the bid. A commission is a separate flat fee per lot, charged on top of a near-raw spread on some account types. Spread-only accounts have no commission; raw or ECN accounts charge one in exchange for tighter spreads.
What is a swap fee?
A swap, or rollover, is the financing cost of holding a leveraged position overnight. It comes from the interest-rate difference between the two currencies in a pair, and it can be a charge or a credit depending on which way you hold them. It repeats every night you stay in the trade.
Is spread-only or commission-based cheaper?
It depends on how much you trade. Below roughly one pip of all-in cost, spread-only often wins; above it, raw spread plus commission pulls ahead. The more frequently you trade and the larger your size, the more a commission account tends to save, which is why active traders favour it.
Why is swap charged triple on Wednesday?
Markets are closed at the weekend, but financing still accrues. Most pairs apply a triple swap on Wednesday to cover Saturday and Sunday in advance, so a position held through midweek pays three nights at once.
Which trading cost is the biggest?
It depends on your holding period. For scalpers and day traders, spread and commission dominate. For swing and position traders, swap becomes the largest cost and can eventually exceed the spread that opened the trade.
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