What is Exchange Commission?

How Exchange Commission Works

Betting exchanges make their money differently from traditional bookmakers. Rather than offering odds with an overround baked in, they act as a marketplace where bettors trade against one another. The exchange charges a commission on net winnings from each settled market. Rates vary by platform and by account status — Betfair's standard rate is currently 10% but most active accounts attract a lower 'discounted' rate, sometimes as low as 2%. Smarkets and Matchbook have historically advertised flat rates of around 2% and 1.5% respectively, though you should always check current terms directly with each exchange.

Commission is applied to net winnings per market, not per individual bet. If you place several bets in the same market and end up with a net profit, commission is taken on that profit only. If you have a net loss in a market, no commission is charged. Some exchanges calculate commission per bet rather than per market — again, terms differ, so check before you bet. The practical effect is that your effective odds are slightly lower than the displayed price, and this must be factored into any profitability calculation.

A Worked Example

Suppose you back a horse at 5.0 (decimal) with a £100 stake on an exchange charging 5% commission. If the horse wins, your gross profit is £400 (£500 returned minus your £100 stake). The exchange deducts 5% of £400, which is £20, leaving you with a net profit of £380 and total returns of £480. In effective decimal odds terms, that equates to roughly 4.80 rather than 5.0 — a meaningful difference when assessing whether a bet offered value.

This single example illustrates why comparing exchange prices directly with bookmaker prices requires adjustment. A bookmaker offering 4.90 decimal with no commission may actually return more than an exchange showing 5.0 at 5% commission. The break-even commission rate in this case is 2%, meaning only if commission is below 2% does the exchange price of 5.0 beat 4.90. Running this calculation consistently is essential for anyone serious about tracking true profitability.

Why It Matters When Following or Judging a Tipster

When a tipster records results and publishes their profit in points, the odds they quote are usually the displayed exchange price or a bookmaker price at the time the tip is advised. If they are tipping exchange bets without deducting commission from their figures, their stated yield will be overstated. On a high-volume service operating at a modest margin, even a 2–5% commission charge can be enough to turn a theoretically profitable record into a practical loss for followers.

At TipsterCheck, we look carefully at whether a tipster's proofed results reflect post-commission returns where exchange betting is involved, and whether the advised odds are achievable after fees. When assessing a tipster, ask whether their ROI or yield figures account for commission, what exchange and commission rate they assume, and whether the sample size is large enough to distinguish genuine edge from variance. A tipster whose edge disappears once commission is factored in is not genuinely profitable for followers.

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