Four numbers decide your cost: spread, commission, swap, and slippage. Add them together for one round turn and you have the only number that actually changes your P&L. A broker with a tighter advertised spread but worse execution is more expensive than the one you dismissed. Compare total cost per round turn, on your instrument, at your trading hours.
Why broker comparisons are almost always useless
Broker comparison sites are affiliate businesses. The "best broker" is almost always the one paying the highest referral commission, not the one with the lowest real cost to you. Their "average spread" figures come from peak liquidity hours and hide the 3× wider spreads you will pay during news and at rollover.
This lesson does not rank brokers. It gives you the framework to rank them yourself, against your own instrument, session and trade frequency. The framework transfers to any broker. The rankings do not.
T
Written by the Trade To The Top team|Reviewed 30 September 2026
Cost-per-round-turn methodology cross-checked against FCA and ASIC CFD cost-disclosure requirements, ESMA's 2018 product intervention measures, and published execution-quality disclosures from IC Markets, Pepperstone and FP Markets. Slippage figures reconciled with Lesson 05. Swap mechanics reconciled with Lesson 04.
Two brokers. One advertises 0.1 pips on EUR/USD. The other advertises 0.6. The first one is more expensive. This lesson shows you why, and how to see it before you fund an account.
Key takeaways
Total cost per round turn = spread + commission + swap + slippage. Everything else is marketing.
A "raw spread" account is not cheaper. It usually just moves the cost from the spread into a commission line.
Advertised spreads are best-case numbers. They widen during news, rollover and low liquidity.
Swap applies to every position held overnight. On a swing trade it can exceed the spread.
Slippage is invisible until you trade live. It is the biggest source of difference between brokers.
Regulation tiers are not equal. Tier-1 protects you with segregated funds and compensation schemes. Offshore does neither.
Leverage is not a benefit. Higher leverage means more margin to lose, not more profit to make.
Stop-out level matters more than leverage. It decides when the broker closes your losing position.
Withdrawal speed is a real factor. A broker that takes five days to process is a broker you cannot exit quickly.
Compare on your instrument, at your hours, at your trade frequency. There is no universal "best" broker.
Every broker cost falls into one of four buckets. Nothing else you read on a comparison page changes your P&L.
THE FOUR COSTS · WHAT YOU ACTUALLY PAY
Every trade pays into all four buckets. Only the sizes change between brokers.
Every trade pays all four. Only one of them is fully visible on the broker's own marketing page.
Read that bottom bar again. Total cost per round turn is the sum of all four. Not spread alone. Not spread plus commission. The complete cost of opening and closing one position on one instrument.
Brokers compete on the number you can see. The number you can see is the spread. So brokers advertise tight spreads and recover the cost elsewhere — commission, swap, or execution. You cannot escape the cost. You can only see where it goes.
The cost is always there. The only question is whether you can see it.
Spread — fixed, variable, raw
The spread is the difference between the bid and the ask. You buy at the ask and sell at the bid, so the spread is paid on every position. On a standard EUR/USD trade, a 1-pip spread costs $10 per standard lot.
Three spread types exist, and they are not interchangeable:
Spread type
How it behaves
What it looks like in practice
Fixed spread
Constant pip value set by the broker.
Looks predictable. During news, the broker widens it or slips the fill.
Variable spread
Floats with liquidity.
Tighter on average. Wider during news and rollover.
Raw spread
Tightest possible. Paid for with commission.
0.0–0.3 pips typical. But add $3–7 per lot round turn.
The raw-spread account is where most beginners get confused. It is not cheaper. It is differently structured. A raw account with a 0.1-pip spread and a $6 round-turn commission on a standard lot costs 0.1 pips + 0.6 pips equivalent = 0.7 pips. A standard account with a 0.7-pip spread and no commission costs 0.7 pips. Same cost. Different marketing.
The reason raw accounts exist is not to save you money. They exist because they are clearer. The raw spread shows the market cost. The commission shows the broker cost. You can see exactly who is charging what. On a standard account, both are bundled into the spread and you have no idea where the money goes.
Common mistake
Comparing advertised spreads without checking the commission on the same page. "0.0 pips on EUR/USD" is meaningless if the round-turn commission is $8 per lot. A 0.0 spread + $8 commission is 0.8 pips equivalent. That is more expensive than a 0.6-pip variable spread with no commission on a standard account. Always convert to the same unit before comparing.
Commission — the hidden line
Commission is an explicit per-lot fee charged on entry, exit, or round turn. On raw-spread accounts, it is the broker's actual revenue. On standard accounts, it is usually folded into the spread and not shown separately.
Typical ranges on regulated brokers for EUR/USD:
$3.00 per lot per side = $6 round turn = 0.6 pips equivalent.
$3.50 per lot per side = $7 round turn = 0.7 pips equivalent.
$2.50 per lot per side = $5 round turn = 0.5 pips equivalent.
$0 per side (standard account) = commission bundled in spread.
The conversion is simple. On EUR/USD, $10 per pip per standard lot means $10 = 1 pip. So $6 round turn commission = 0.6 pips. Every commission figure converts to a pip-equivalent on every instrument, using that instrument's pip value.
Two traps with commissions:
Charged on entry only or round turn? A "$3 commission" on a broker that charges per side is $6 round turn, not $3. Always verify whether the advertised figure is per side, per round turn, or per lot.
Fixed or tiered? Some brokers discount commission at higher volumes. If you trade under 10 lots a month, you are on the top tier. Ignore volume discounts in your calculation unless you actually qualify for them.
Swap — the overnight cost
Swap is the interest charged or credited for holding a position overnight. On an intraday trade, it does not apply. On a swing trade held for days or weeks, it can exceed the spread.
Swap is calculated from the difference between the two currencies' interest rates, adjusted by the broker's markup. You never see the markup explicitly — only the final long and short swap rates per lot per night.
Three things to know about swap:
How swap actually works
01
It is charged at rollover.
17:00 New York time (usually). If you close before rollover, no swap. If you hold through it, you pay or receive one night's worth.
02
Wednesday is triple swap.
On most pairs, the Wednesday rollover charges three nights to account for the weekend value date. A position held over Wednesday pays 3× the normal rate. A swing trade that starts Wednesday morning and ends Thursday morning pays 3 nights of swap, not 1.
03
It compounds.
On a trade held for two weeks, swap is charged fourteen times. On EUR/USD at typical retail rates, that is often 10–15 pips of accumulated cost — larger than the entry spread and commission combined.
For a scalper or day trader, swap is zero. For a swing trader, swap is a first-class cost. Before choosing a broker for swing trading, look at their published swap rates for your instruments. The difference between two brokers can be 30–50% of your total trading cost on multi-day positions.
Slippage — the invisible one
Slippage is the difference between the price you requested and the price you actually got. It is the only cost that does not appear in any broker's published numbers. It depends on execution quality, latency, and the market at the moment of your click.
Two brokers can both advertise 0.1 pips on EUR/USD and deliver completely different results. The one with better execution infrastructure will fill you closer to the requested price. The one with worse infrastructure will slip you 0.5–2 pips on volatile candles, quietly eating into every winner and enlarging every loser.
Slippage is not free. It is a real cost. It just hides in the fill price rather than the fee line. You cannot see it on demo, and you cannot see it on a comparison page. The only way to see a broker's slippage is to trade live and log the difference between requested and filled prices.
For most retail traders, slippage is 10–30% of total trading cost. For scalpers on fast timeframes, it can be higher than spread and commission combined. This is why a broker that advertises a tighter spread is not necessarily cheaper.
Total cost per round turn
The total cost per round turn is the only number that lets you compare two brokers fairly. Calculate it once for your instrument, at your trading hours, at your trade frequency.
TOTAL COST PER ROUND TURN · THE COMPARISON TABLE
Worked on 1 standard lot EUR/USD · intraday (swap = 0) · typical retail spread
Broker A advertises the tightest spread. Broker C has the lowest total cost because its execution quality is best.
This is the whole lesson in one chart. Broker A — the one advertising 0.1 pips — is not the cheapest. Broker C, with a wider advertised spread, has the lowest total cost because its execution does not slip. Broker D, with a moderate spread and bad execution, is 60% more expensive than C.
The order of the columns matters. Spread is the smallest of the four costs on a typical trade. Commission, swap and slippage are usually larger. Any comparison that leads with the spread is showing you the smallest variable.
Regulation tiers and what they protect
Regulation is not one thing. It is a tier system, and the protection you get depends on which tier your broker is licensed under.
Tier 2 — moderate.
CySEC (Cyprus), FSA (Japan), BaFin (Germany), FINRA-adjacent EU regulators. Segregated funds. Similar to Tier 1 but with weaker enforcement history and typically slower resolution times.
03
Tier 3 — offshore.
FSA (Seychelles), IFSC (Belize), VFSC (Vanuatu), SVG FSA. Minimal protections. Higher leverage allowed (up to 500:1 or more). No compensation scheme. Segregation enforced unevenly. Resolution of disputes depends almost entirely on the broker's own compliance department.
Tier 3 is not automatically bad. Some Tier-3 brokers are properly run and cheap. But the trade-off is real: you are accepting weaker legal protection in exchange for higher leverage and often lower costs. If the broker fails, or disputes a withdrawal, your recourse is minimal.
The rule is straightforward. If you cannot afford to lose your account balance to a broker failure, do not use a broker without a Tier 1 or Tier 2 licence. If you are trading small and accept the risk, Tier 3 can be cheaper. Do not accept Tier 3 for a serious account.
Leverage, margin, stop-out
Leverage is the amount of position size the broker lets you control with a given margin. It is not a benefit. It is a permission. Higher leverage means more size per dollar of margin, which means a losing trade costs you more, faster.
What actually matters is not the leverage offered. It is the stop-out level — the margin level at which the broker forcibly closes your losing positions.
Typical stop-out levels:
50% margin level. The broker closes your position when equity falls to 50% of used margin. This is common on Tier-1 regulated accounts. The stop-out comes late, giving the position room to recover — or to lose more.
20% margin level. Tighter. The broker closes you sooner. This is safer from the broker's perspective but can cut positions that would have recovered.
No fixed stop-out. Rare but exists offshore. Positions can go negative. See negative balance protection below.
Stop-out level matters more than leverage because it is the point at which you lose control of the position. A broker offering 500:1 leverage but a 20% stop-out is stricter in practice than a broker offering 30:1 leverage with a 50% stop-out — because the high-leverage account is more likely to trigger the stop-out on a normal loss.
Negative balance protection — what it actually means
On a Tier-1 or Tier-2 regulated account, you cannot lose more than your account balance. If a gap event takes your account negative, the broker absorbs the loss. This is called negative balance protection.
On Tier-3 accounts, this protection usually does not exist. A gap event can take your balance below zero, and the broker can legally demand you deposit more. The January 2015 CHF devaluation put retail traders at offshore brokers into millions of dollars of debt. Tier-1 traders walked away. Tier-3 traders did not.
Check this before funding any account. It is a binary protection, not a soft one.
Worked example — four brokers, one trade
Same trade, four different brokers. One standard lot EUR/USD, intraday, 40-pip target, 20-pip stop. The trade hits target. Gross profit before costs is $400. Here is what each broker actually pays out.
Worked example — 1 lot EUR/USD winner on four brokers
Trade
Buy 1.0850, target 1.0890, stop 1.0830
Gross result
+40 pips = +$400
Outcome
Target hit
Broker A — RAW account.
Spread 0.1 pip + Commission 0.6 pip + Slippage 0.3 pip = 1.0 pip total.
Net: $400 − $10 = +$390 (−2.5% of gross)
Broker B — STANDARD account.
Spread 0.6 pip + Commission 0 + Slippage 0.4 pip = 1.0 pip total.
Net: $400 − $10 = +$390 (−2.5% of gross)
Broker C — ECN, best execution.
Spread 0.2 pip + Commission 0.5 pip + Slippage 0.1 pip = 0.8 pip total.
Net: $400 − $8 = +$392 (−2.0% of gross)
Broker D — RETAIL MARKET MAKER.
Spread 0.4 pip + Commission 0 + Slippage 1.2 pip = 1.6 pip total.
Net: $400 − $16 = +$384 (−4.0% of gross)
$8 SPREAD ACROSS BROKERS ON ONE WINNING TRADE.
The $8 difference on one trade looks trivial. Scale it up. 200 trades a year, 1 lot each:
Broker C — best execution
Cost per trade0.8 pip
Annual cost$1,600
Gross profit$80,000
Net profit$78,400
$78,400Net after all costs
Broker D — expensive execution
Cost per trade1.6 pip
Annual cost$3,200
Gross profit$80,000
Net profit$76,800
$76,800Net after all costs
The difference is $1,600 a year on 200 trades. On a $10,000 account, that is 16% of your starting capital paid in extra execution cost. Not because you traded badly — because your broker was worse at getting you filled.
Now consider the loss side. The same costs apply to losers. On a losing trade, the cost is added to the loss, not subtracted from the win. A 20-pip stop that becomes a 21.6-pip loss because of execution is a 8% enlargement of the loss. Across a losing streak, this compounds the drawdown.
Cost is not a per-trade nuisance. It is a permanent drag on your expectancy.
When this fails
Where broker comparison breaks down
Advertised spreads are the best case, not the average. A broker advertising "0.0 pips on EUR/USD" means during the London-New York overlap, during peak liquidity, at the tightest moment. On a quiet Friday afternoon or during a news release, the same spread will be 5–10× wider. Always check the broker's average spread across a full trading day, not the headline number.
Demo spreads are not live spreads. Brokers route demo orders differently. Some brokers show demos at tighter spreads than live accounts to encourage sign-up. A spread that looks tight on your demo may be 50% wider on your live account. This is the single most common surprise for new traders.
Backtest data ignores all four costs. A strategy that backtests at 3R average winner often produces 2R live simply because the backtest treated every entry at the signal price, every exit at the target price, and every commission as zero. Real execution costs 20–40% of a backtested edge. See Lesson 49.
Switching brokers to save 0.1 pip is not worth it if it costs you anything else. Withdrawal speed, execution quality, platform stability, support responsiveness, and regulatory safety all matter. The cheapest broker is not the best broker. The best broker is the one whose total cost and total reliability combine to the lowest number for your workflow.
Regulation is a spectrum, not a switch. "Regulated" on a broker's website can mean anything from FCA to Seychelles. Read the actual licence number, check the actual regulator, and confirm the entity you are opening the account with is the one holding the licence. Many brokers operate multiple entities, and the entity you sign with may not be the one you thought.
None of these are the comparison's fault. They are the realities the comparison industry prefers not to surface. Every number on a comparison page is real. The question is whether it is the number you will actually trade at.
Before you fund a broker — seven checks
Total cost per round turn on your instrument.Spread + commission + swap + slippage. Converted to one unit.
Average spread across a full trading day, not the headline. Ask support for the number or measure it yourself on demo across sessions.
Swap rates on your held instruments.Check the platform's symbol specification sheet. Look at both long and short, and check for triple-swap day.
Regulation entity you are actually signing with.Check the licence number on the regulator's own register, not the broker's website.
Negative balance protection.Is it in the terms? On which entity? Does it apply to your account type?
Stop-out level.Percentage at which the broker closes your losing positions. Read the platform spec.
Withdrawal speed and method.How long does a normal withdrawal take? What fees apply? What is the process for a dispute?
In one box
Four numbers matter: spread, commission, swap, slippage.
Total cost per round turn is the only comparison that matters.
Advertised spread is the smallest variable. Commission, swap and slippage are usually larger.
Raw accounts are not cheaper. They move cost from spread to commission.
Swap is zero intraday, meaningful on swings. Wednesday is triple swap.
Slippage is invisible on demo and in comparisons. It shows only on live fills.
Regulation has three tiers. Tier 1 protects. Tier 3 usually does not.
Negative balance protection is binary. You either have it or you do not.
Stop-out level matters more than leverage. It decides when you lose control.
Cheapest is not best. Execution quality, withdrawal speed and regulation all count.
Log your fills to reveal real slippage. Our free journal has fields for requested price, filled price and slippage in pips. After 30 live trades you have your own execution-cost measurement — not the broker's advertised number.
5 questions · immediate feedback · retake any time
Question 01 of 05
What are the four numbers that make up total trading cost?
Correct: C. Spread, commission, swap and slippage. Add them together for one round turn and you have the only number that actually changes your P&L between brokers.
Question 02 of 05
A broker advertises 0.0 pips on EUR/USD with a $6 round-turn commission. What is the effective spread?
Correct: B. On EUR/USD, one standard lot pays $10 per pip. A $6 round-turn commission converts to 0.6 pips. Add the 0.0 pip spread and the effective cost is 0.6 pips — same as a standard account with a 0.6-pip spread and no commission.
Question 03 of 05
You hold a long EUR/USD position over Wednesday night. What swap do you pay?
Correct: D. On most pairs, the Wednesday rollover charges three nights of swap to account for the weekend value date. A position held over Wednesday pays 3× the normal overnight rate.
Question 04 of 05
Broker A advertises 0.1 pip spread. Broker C advertises 0.2 pip spread. Which is cheaper overall?
Correct: A. Spread is the smallest of the four costs. A broker with a 0.1-pip spread and heavy slippage can be more expensive than a broker with a 0.2-pip spread and clean execution. Total cost per round turn is the only fair comparison.
Question 05 of 05
Why does the stop-out level matter more than the leverage offered?
Correct: B. Leverage is permission, not benefit. The stop-out level is the margin level at which the broker closes your position. It is the point at which you lose control. A high-leverage account with a tight stop-out is stricter in practice than a low-leverage account with a wide stop-out.