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What Is the Betfair Exchange?
Betfair Exchange is a peer-to-peer betting marketplace. When you back a selection, you bet against another person who wants to lay it, not against Betfair. Betfair matches the two bets and takes commission on net winnings.
To start: learn the difference between backing and laying, read decimal odds, understand commission, then practise in simulation before trading small stakes. The five steps below set out that order.
At a bookmaker such as bet365 or Paddy Power, you bet against the bookmaker, who sets the odds with a profit margin built in. On the exchange, the market sets the odds, much as buyers and sellers set a share price. With no bookmaker margin, exchange odds are usually better.
Seven concrete advantages
- Better odds: no bookmaker margin, which adds up over many bets.
- You can lay: bet on something not to happen, taking the bookmaker's role.
- No account restrictions: bookmakers restrict or ban winning accounts; the exchange needs both winners and losers.
- Trading: back at one price, lay at another, and lock in a profit before the event ends.
- No maximum stake limits on most markets.
- Cash out at any time through the trading mechanism itself.
- Market depth: see how much money is available at each price.
Back Betting vs Lay Betting
Back Betting
Backing is the familiar bet: you back a selection to win. If it wins, you collect; if it loses, you lose your stake.
Example: Arsenal to win at 2.50, £50 backed. If Arsenal win, you receive £125 (£75 profit plus your £50 stake). If not, you lose £50.
Lay Betting
Laying is unique to exchanges. You bet that a selection will not win, accepting someone else's back bet as the bookmaker would.
Example: you lay Arsenal at 2.50 for a £50 stake. If Arsenal do not win, you collect £50 (the backer's stake). If they win, you pay out £75 (£50 × (2.50 − 1)).
Your liability as a layer can exceed your potential profit: at 2.50, laying £50 risks £75 to win £50. The maths mirrors backing.
Arsenal to Win at 2.50 · £50 stake
How Betfair Odds Work
Betfair uses decimal odds only:
Profit = Stake × (Odds − 1)
At 3.40 with a £100 stake: profit = £100 × (3.40 − 1) = £240. Total return = £340.
Odds run from 1.01 to 1000 and move in fixed steps called ticks. The step size widens as the odds rise:
- 1.01 – 2.00: steps of 0.01
- 2.00 – 3.00: steps of 0.02
Because the step size changes, traders measure price moves in ticks rather than percentages.
How to Read the Ladder
The Betfair website shows a simple blue (back) and pink (lay) interface. Traders use ladder software instead: a vertical price display that shows the market structure at a glance.
The ladder has three columns, back money / odds / lay money, with back money in blue and lay money in pink at each price. The gap between the best back and best lay price is the spread. Liquid markets, such as horse racing before the off, often have a one-tick spread; thin markets, such as minor football leagues, can be several ticks wide.
The ladder shows:
- how much money is available at each price
- where the market consensus sits
- whether a price is drifting (lengthening) or shortening
- where large "walls" of money may resist price movement
The Betfair website is not enough for trading
You can back and lay on the website, but it does not show market depth, execution is slow and there is no P&L tracking. It is fine for your first small test trades. For regular trading, use Bet Angel (free trial) or Cymatic Trader (free).
What Is Exchange Trading?
You do not have to wait for an event to finish. By backing and laying the same selection at different prices, you can lock in a profit whatever the result. That is trading.
A Simple Example Trade
Horse racing, shortly before the off. You judge the favourite, Blue Dahlia, to be overpriced at 4.50 and expect money to shorten the price.
- You back Blue Dahlia at 4.50 for £100.
- The horse is backed in to 3.80.
- You lay Blue Dahlia at 3.80 for £118.42.
- The "green up" function equalises profit across all outcomes.
- You make about £18 whatever the race result.
Blue Dahlia — Pre-Race Back-to-Lay
You traded the price movement, not the result. Scalping, swing trading, lay the draw and back-to-lay are all variations on this.
Commission and Costs
Betfair charges commission on net winnings in a market, not on every bet. The standard UK rate is 5%: break even on a market and you pay nothing; profit £100 and you pay £5.
- Market Base Rate (MBR): commission varies by market. Check the rate before trading.
- Premium Charge: a small minority of consistently profitable customers may be charged 20%, 40% or 60% on top of standard commission. It is not a concern when starting out.
- Free bets and bonuses: use new account offers for practice, but do not build your approach around them.
On small scalping profits of a tick or two, commission takes a meaningful share. Include it in every strategy calculation from the start.
Your First 5 Steps
Take these in order.
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01
Open a Betfair account and verify it You need to be 18+, resident in a supported country, and pass ID verification. See our step-by-step account opening guide. Deposit a small amount to get familiar with the interface, not to trade.
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02
Read the exchange mechanics guides Before risking money, read How Betfair Exchange Works, Back Betting Explained, Lay Betting Explained and Commission Explained.
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03
Place your first back bet on the exchange Find a horse racing market with 15–20 minutes to the off. Back the favourite for £2 and watch the price as the off approaches. Let the race run without laying off. The aim is to read the market, not to make money.
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04
Download Bet Angel or Cymatic Trader and use the practice mode Both have simulation modes for trading with virtual money on live markets. Spend two weeks here before trading real money. Practise placing back and lay bets, reading the ladder and using green-up. Our Bet Angel review and Cymatic Trader review cover setup.
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05
Start with one strategy, one sport, small stakes Pick one strategy from our strategy guides; back-to-lay on horse racing and lay the draw on football are common starting points. Use a bank of £100–£200 and a maximum stake of 5% of bank (£5–£10) per trade. Log every trade and review after 100.
What to Learn Next
Once you understand back and lay mechanics and have placed a few real trades, go deeper in this order:
Exchange Fundamentals
- How to Read the Betfair Market: ladder depth, money flow, price signals
- Betfair Commission Explained: market base rates, Premium Charge
- Green Up Explained: locking in profit on all outcomes
- Bankroll Management: sizing trades to survive variance
Choose Your Sport
- Horse Racing: the most liquid market on Betfair; suits scalping and back-to-lay.
- Football: structured match flow; suits lay the draw and correct score trading.
- Tennis: large in-play price swings on breaks of serve.
- Cricket: slower, position-based trading that suits patient swing traders.
Choose Your Strategy
- Scalping: 1–2 tick profits, high frequency, needs full attention and fast software
- Swing Trading: hold for bigger moves, fewer trades per session
- Lay the Draw: a popular football strategy for beginners
- Back-to-Lay: the basic trade structure used across all sports
Software
- Bet Angel Professional: strong for automation
- Geeks Toy: a fast ladder favoured by scalpers
- Cymatic Trader: a free option
- Best Trading Software 2026: full comparison
Expect to lose money while you learn to read markets, manage positions and execute under pressure. Simulate first, start small, keep strict stake limits and track everything. Treat trading as a skill to learn, not a shortcut to easy money. Read our bankroll management guide before you trade with real money.