A betting exchange is essential for matched betting — it's where you place your lay bets to offset your bookmaker back bets. In the UK, three exchanges dominate: Betfair, Smarkets, and Matchbook. Here's how they compare.
Betfair — the market leader
Betfair is the world's largest betting exchange and has by far the highest liquidity of any UK exchange. For matched bettors, this means you can almost always get your lay bets matched, even at short notice and at competitive odds.
- Commission: 2–5% on winnings (varies by market base rate and premium charge)
- Liquidity: Excellent — the deepest markets in the world
- Interface: Functional but dated; mobile app is much improved
- Welcome offer: Bet £10 get £30 in exchange credits (check current terms)
- Best for: Beginners and anyone prioritising matched bet availability
Smarkets — lowest commission
Smarkets charges a flat 2% commission on all markets — significantly lower than Betfair for many users. The interface is clean and beginner-friendly, and liquidity has grown substantially in recent years.
- Commission: Flat 2% on all winnings
- Liquidity: Good on major UK football and racing markets; thinner on minor sports
- Interface: Clean, modern, easy to navigate
- Welcome offer: £10 zero commission promotion (check current terms)
- Best for: Reducing costs once comfortable with matched betting
Matchbook — competitive but niche
Matchbook offers commission from 1.5% and competitive odds on European football. Liquidity is lower than Betfair and Smarkets on most markets, so it is better used as a supplementary exchange rather than a primary one.
- Commission: From 1.5%
- Liquidity: Lower — best on European football
- Interface: Solid, includes live streaming for some events
- Best for: Supplementary use alongside Betfair or Smarkets
Which exchange should you start with?
Start with Betfair. The liquidity advantage means you'll always find matched bets, and the welcome offer adds value to your first month. Open Smarkets at the same time — when Smarkets has matching liquidity, the lower commission saves you real money over time.
Does exchange commission matter?
For qualifying bets: very little — your lay bet wins only occasionally. For free bet conversion: yes. If you're converting a £30 free bet and win the lay, 2% commission (Smarkets) vs 5% (Betfair standard) is a £0.90 difference. Over hundreds of bets, this adds up. Our calculator lets you input the exact commission rate for either exchange.
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