In forex trading, the spread is the built-in price difference between the bid (sell) and ask (buy) price on a currency pair — the broker earns this gap on every trade without charging a separate fee. A commission is a separate, explicit charge per trade, usually a fixed dollar amount per standard lot (e.g. $3.50 per lot). Many brokers use one or the other; some use both. Spread-only accounts are simpler and suit lower-volume traders. Commission-based accounts (typically called ECN or Raw accounts) offer tighter raw spreads but add a flat fee — making them more cost-effective for high-volume traders.
Broker Review Contents
Introduction: The Two Ways Brokers Get Paid
Every time you open or close a forex trade, your broker earns revenue. That revenue comes from one of two sources — or in some cases both simultaneously. Understanding the difference between spreads and commissions is not just academic knowledge about how brokers make money. It is directly relevant to your own profitability, because every cent your broker earns comes from your trading account.
The way a broker charges you affects the real cost of every strategy you implement, the viability of high-frequency approaches, and the true comparison between brokers that advertise different pricing models. This guide breaks down spreads and commissions with precision, shows you how to calculate your real cost per trade, and helps you determine which pricing model is better for your specific trading style. Compare brokers by actual total cost on the Compare Forex Brokers tool at CompareBroker.io.
What Is a Forex Spread?
The spread is the difference between the bid price (the price at which you can sell a currency pair) and the ask price (the price at which you can buy it). The broker always quotes two prices simultaneously, and the gap between them — measured in pips — is the spread.
Example: EUR/USD Bid = 1.08500, Ask = 1.08530. Spread = 0.00030 = 3 pips. You buy at 1.08530. For the trade to break even, the bid price must rise to 1.08530. You are already 3 pips in the red the moment you enter.
The spread is embedded directly in the price — it is invisible in the sense that you never see a separate charge appear on your statement. The broker simply quotes you a price that already includes their margin. When you buy at the ask and later sell at the bid, the round-trip cost is the spread.
Spread-only pricing is the default model for market makers and many STP brokers. It is the most common pricing structure in retail forex. You can compare brokers with the tightest live spreads on the Compare Zero Spread Brokers page and the Compare Fixed Spread Brokers page.
What Is a Commission in Forex?
A commission is an explicit, separately charged fee that a broker applies per trade — typically expressed as a dollar amount per standard lot (100,000 units) traded. The most common structure is a round-trip commission: the full charge is applied either at trade entry or split between entry and exit.
Example: A broker charges $3.50 per standard lot per side. You open 1 lot of EUR/USD: $3.50 charged at entry. You close the trade: $3.50 charged at exit. Total round-trip commission: $7.00.
Commission-based pricing is most associated with ECN and Raw-spread accounts, where the broker passes the tightest available interbank prices to the client and earns exclusively through the transparent per-lot fee. The raw spread on EUR/USD on such accounts might be as low as 0.0–0.3 pips — far tighter than the 1.0–2.0 pips typical on spread-only accounts.
Commissions are displayed separately in your trading history and are clearly visible on every trade ticket — making this a more transparent cost structure than embedded spreads. Explore ECN brokers with commission-based pricing at CompareBroker.io.
Spread vs Commission: Which Is Cheaper?
The answer depends entirely on your trading volume, position size, and how often you trade. There is no universal answer — you need to calculate the effective cost per pip for each model and compare them directly.
The Total Cost Formula
Total Trading Cost = Spread Cost + Commission Cost Spread Cost (in USD) = Spread in pips × Pip Value per lot × Number of lots Commission Cost (in USD) = Commission per lot × Number of lots Effective Spread = Raw Spread + (Commission per lot ÷ Pip Value per lot)
Worked Example: Same EUR/USD Trade on Two Account Types
Trade: Buy 2 standard lots EUR/USD, hold for 50 pips, then close.
Account A — Spread-Only (Standard Account): EUR/USD spread = 1.5 pips. Pip value per standard lot = $10. Total spread cost = 1.5 pips × $10 × 2 lots = $30. Commission = $0. Total cost: $30.
Account B — ECN/Raw + Commission: EUR/USD raw spread = 0.1 pips. Commission = $3.50 per lot per side × 2 lots × 2 sides = $14. Total spread cost = 0.1 × $10 × 2 = $2. Total cost: $2 + $14 = $16.
Verdict: Account B saves $14 on this single trade. Across 100 trades per month, that is $1,400 saved. For high-volume traders, ECN commission accounts are significantly cheaper. For traders making 2–5 trades per month with small position sizes, the simplicity of a spread-only account often outweighs the savings.
Commission and Spread by Account Type
Account Type | Spread | Commission | Total Cost (EUR/USD, 1 lot) | Best Suited For |
Standard (Market Maker) | 1.0–2.5 pips | None | $10–$25 per trade | Beginners, low-volume traders |
STP Standard | 0.6–1.5 pips | None | $6–$15 per trade | Retail traders, medium volume |
ECN / Raw | 0.0–0.5 pips | $3.50–$7.00/lot RT | $3.50–$12 per trade | Day traders, scalpers, high volume |
Zero Spread | 0.0 pips | $3.00–$6.00/lot RT | $3–$6 per trade | Scalpers, algorithmic traders |
As this table shows, the cheapest account for a scalper placing 20+ trades per day is almost always the ECN commission model. The cheapest account for someone placing 3 trades per week with small lot sizes may well be the standard spread-only model — because the fixed commission is charged regardless of how small the position is. Use the Compare Forex Brokers tool to filter by both spread and commission data simultaneously.
How Commissions Are Quoted: Structures to Know
Not all commission structures are the same. Understanding how a broker expresses their commission prevents misreading the true cost.
Per Lot Round Trip
The most transparent structure. A single charge covers both opening and closing the trade. Example: $7.00 per standard lot round trip = $7 total per trade regardless of when you open or close.
Per Lot Per Side
Charge is split between entry and exit. Example: $3.50 per lot per side = $3.50 when you open + $3.50 when you close = $7.00 total. Mathematically identical to round-trip but displayed differently in trade history.
Percentage of Trade Value
Rare in retail forex but common in equities. The commission is a percentage of the total trade notional value. For a $100,000 standard lot at 0.007%, the commission is $7. This structure scales with position size rather than being fixed per lot.
Tiered Commission (Volume-Based)
Some brokers reduce commission rates for high-volume traders. A trader placing under 10 standard lots per month might pay $7 per lot, while a trader placing 500+ lots per month might negotiate $3 per lot. Professional and institutional account tiers at brokers like Pepperstone and Eightcap often include volume-based commission rebates.
Hidden Costs Beyond Spread and Commission
Spread and commission are the primary trading costs, but they are not the only ones. A complete cost picture includes:
- Overnight swap / rollover fees: Applied when positions are held past the daily cutoff (typically 5 PM New York time). Can be positive (you earn) or negative (you pay) depending on the interest rate differential. Muslim traders should explore Islamic swap-free accounts.
- Inactivity fees: Some brokers charge monthly fees if no trades are placed for a defined period (commonly 3–12 months). Always check the fee schedule before choosing a broker.
- Deposit and withdrawal fees: Some brokers charge for certain payment methods. Credit/debit card deposits often carry a 1–2% processing fee. Always verify the full fee schedule.
- Currency conversion fees: If your account base currency differs from the currency of your profit/loss, a conversion fee applies. Minimised by choosing a broker that supports your local currency as an account denomination.
Which Should You Choose: Spread or Commission?
Here is a practical decision framework based on your trading profile:
- You trade 1–5 times per week, small position sizes: Spread-only account. The fixed commission on an ECN account becomes disproportionately expensive for very small and infrequent trades.
- You trade 5–20 times per week, standard lot sizes: Compare the effective spread (raw spread + commission equivalent) between both models. STP standard accounts may be competitive without the commission structure.
- You scalp or day-trade 10+ times per day: ECN commission account almost always wins. The raw spread savings compound dramatically at high frequency. Compare day trading brokers with ECN execution.
- You run automated trading strategies (EAs): ECN commission accounts are essential. Even 0.5 pip spread savings per trade multiplied by thousands of automated trades produces significant performance differences. Compare MT4 brokers with raw spread access.
Pro Tip: Always calculate the effective spread for any account you consider — this converts everything to a comparable pip-cost figure: Effective Spread = Raw Spread + (Round-Trip Commission ÷ Pip Value per lot). For EUR/USD with a $7 RT commission on a standard lot: $7 ÷ $10 per pip = 0.7 pips equivalent. A raw account showing 0.1 pip + 0.7 pip equivalent commission = 0.8 pip effective cost. Compare this to a 1.5 pip spread-only account — the raw account is still cheaper.
How to Find the True All-In Cost on a Demo Account
The most reliable way to verify a broker’s real trading costs is to open a forex demo account and observe live spread data across different sessions. Record the actual spread during the London-New York overlap (when spreads are tightest) and during pre-market Asian hours (when spreads are widest). This gives you a realistic average rather than relying on the broker’s marketing figures.
Add the commission on top of the observed spread, then compare the effective cost to your closest alternatives. This due diligence takes less than one trading week and can save you thousands in annual trading costs.
Frequently Asked Questions: Commission vs Spread
Can a broker charge both a spread and a commission?
Yes — and some do. Hybrid pricing models apply both a spread (typically 0.3–0.8 pips) and a commission per lot. This is common in some STP account structures that sit between pure spread-only and pure ECN models. Always calculate the total all-in cost rather than evaluating spread and commission separately.
Is a zero-spread account really free to trade?
No. Zero-spread accounts always include a commission to compensate the broker. A 0.0-pip spread with a $6 round-trip commission on EUR/USD equates to a 0.6-pip effective cost — still very competitive but not free. Compare zero spread brokers with their commission structures disclosed side by side.
Do commissions apply to every instrument?
Commissions typically apply to all instruments on commission-based ECN accounts — forex pairs, gold, indices, and oil CFDs. The commission rate per lot varies by instrument; gold (XAU/USD) and indices often carry a higher per-lot commission than forex pairs due to different contract sizes and margin requirements.
How does commission affect my margin requirement?
Commission is charged from your free margin balance, not added to the margin requirement itself. However, on small accounts with tight margins, a commission deducted at trade entry can slightly reduce available free margin. For micro lot traders on small accounts, this is worth monitoring when operating near margin call thresholds.
Conclusion: Total Cost Is What Matters, Not Spread or Commission Alone
The most common mistake traders make when comparing brokers is looking at either the spread or the commission in isolation. Neither figure alone tells you the full story. What matters is the effective all-in cost per pip — the sum of spread cost and commission equivalent expressed in comparable pip terms.
Once you understand the effective spread formula, broker cost comparison becomes straightforward and quantitative rather than impressionistic. The cheapest broker for a scalper placing 20 trades per day will almost certainly not be the cheapest for someone placing 3 swing trades per week.
Find your ideal pricing structure by comparing brokers across spread type, commission level, and account type at CompareBroker.io. Use a demo account to verify real-world spread data before committing capital.
