How to Place a Lay Bet on Betfair Exchange

Quick Version

Log in to betfair.com → Exchange → pick sport → pick market → click the pink button on the right of the selection you want to lay → enter the backer's stake → check the liability figure → click Place bet. The liability (not your stake) is what gets locked from your balance until settlement.

If you want the full mental model, the cluster pillar Betfair Exchange: Complete Beginner's Guide walks through every concept from zero. The conceptual companion to this page is Lay Betting Explained, and the back-side equivalent is How to Place a Back Bet.

What "Laying" Actually Means

A lay bet wins if the selection does not win. You are betting against the outcome. If you lay Manchester City to win the Premier League, you collect when any other team wins it, when the title is shared, or when no one wins. You only lose if the team you laid wins.

Think of it as taking the bookmaker's role for one bet. Someone else wants to back the team. You take the other side. They give you their stake; you promise to pay them their winnings if they win. Betfair holds your liability — the amount you'd owe them — out of your balance for the duration of the market.

This is the structural piece that makes the Exchange a different product to a sportsbook. Read Exchange vs Sportsbook for the wider comparison and Exchange vs Bookmaker: 10 Differences for the practical effects on your trading.

Before You Start: Account Ready?

You need a verified Betfair account with funds in the Exchange wallet. If you haven't done that:

• Open and verify the account: Opening a Betfair Account: Step by Step or Account Setup Walkthrough.
• Set deposit limits before you fund the account: see our responsible gambling page.
• Deposit enough to cover the liability of a small first lay — at the minimum lay price of 1.01, a £2 stake costs you 2p in liability; at 5.0, a £2 backer stake costs you £8.

Web Walkthrough

Mobile App Walkthrough

Same workflow, smaller screen. Tap the menu → Exchange → Sport → Event → Market. Tap the pink lay price (right side of the row). The bet slip pops up. Type the backer's stake. The liability appears in the slip. Confirm. The mobile app's "Quick Bet" mode skips the confirmation screen — turn it off until you've placed at least 50 lays. Mobile lay misclicks happen because the lay button is on the right, where right-handed thumbs naturally land while scrolling.

Worked Example — Laying the Favourite

Liability — The Number That Matters

The single biggest source of beginner errors is confusing stake with liability. Liability is what the lay bet can lose you. Stake is what the backer wins from you. The formula is simple:

Liability = (Lay price − 1) × Backer's stake

Examples:

• Lay 2.00 for £10 stake → liability £10. Risk = reward.
• Lay 3.00 for £10 stake → liability £20. You risk twice what you'd win.
• Lay 1.50 for £10 stake → liability £5. You'd risk half what you'd win.
• Lay 10.00 for £10 stake → liability £90. The classic blow-up trap: it looks small until you click.

The higher the lay price, the bigger the liability per pound staked. Laying outsiders is statistically the most expensive thing a Betfair beginner can do — see Laying Horses for a full treatment of where laying long shots actually pays.

Commission on Lays

Commission is charged on net winnings only — when you lay successfully and the selection loses. Most accounts: 5% on most sports; 2% on UK and Irish horse racing in 2026. New accounts often start with a reduced rate. Lay losses don't attract commission — that part is whole. Full breakdown in Betfair Commission: How Much You Pay and the conceptual guide.

Matched vs Unmatched Lays

Same as backs — two states matter:

• Matched: Someone has backed at the price you offered. The bet is live. The liability stays locked until settlement.
• Unmatched: You've offered a lay price worse for backers than the current best back. Your offer sits in the order book, displayed as available liquidity for a backer at your price. You can cancel any time before it's matched.

If the displayed lay price is 1.80 and you offer 1.75, your bet is unmatched until someone is willing to take a shorter price. If you offer 1.85, it instantly matches because there are backers waiting.

Mistakes Beginners Make Laying

1. Confusing stake with liability. Always read the liability number before clicking Place bet. £20 stake at 5.0 = £80 liability, not £20.
2. Misclicking back instead of lay. The buttons are next to each other. Mobile users especially hit the wrong one. Slow down on the first 50.
3. Laying without thinking about commission. A 1.50 lay at £10 stake makes £10 minus 50p — not £10 net.
4. Laying long shots emotionally. You think a 30/1 shot won't win — but the liability is 29× your "stake" if it does. The Grand National is full of stories of beginners laying 50/1 shots that won.
5. Confusing exposure across multiple lays. If you lay every horse in a 12-runner field, your worst-case liability is the largest single one. The bet slip shows you market P&L per outcome — read it.
6. Confirming a moving price. "Price has changed" prompts pop up when the market moves between click and confirm. Read the new figure before re-confirming, or you'll end up at a different liability.
7. Laying in a thin market. If only £4 is available at the price and you stake £100, only £4 matches; the £96 sits unmatched at your asking price. You may not get filled, or you may get filled at a much worse price seconds later.

Reading the Lay Side of the Ladder

The right side of each market row shows the three best lay prices (the prices currently asked by people offering to lay). The price you can hit instantly as a backer is the best lay; the price you can hit instantly as a layer is the best back. They are mirror images.

If the screen shows 3.40 / 3.45, the back side is 3.40 and the lay side is 3.45. You, as a layer, can match the 3.45 instantly because backers are waiting there. To lay at 3.40, you'd have to wait for new backers to come in at that price — see Understanding the Ladder for the full mechanics. The wider the spread, the more it costs to round-trip a trade.

What Happens After You Click "Place"

Behind the scenes:

1. Your lay order arrives at the matching engine within milliseconds.
2. The engine checks for an opposite (back) order at your price. If yes, it matches you and locks the liability from your account.
3. If liquidity is partial, you get a partial match plus an unmatched balance at your asking price.
4. Your bet appears in "My Bets" → "Matched" or "Unmatched" depending on the outcome.
5. When the market settles, lay winners receive the backer's stake, less commission. Lay losers forfeit the liability.

How Much Liability to Risk

For your first 30 lays: keep liability under £10 per bet. The cleanest way is to start at lay prices around 2.00 with £2-£5 stakes — liability equals stake at evens, so the maths is intuitive.

Once you have an edge, lay sizing is governed by structured staking. Most disciplined exchange traders cap single-bet liability at 1–2% of bankroll. Anything more in the early days is a fast track to a deposit-and-bust cycle.

For deeper context on how laying fits into a long-term Exchange edge, the cluster pillar Betfair Exchange Beginner's Guide covers the full mental model. Can you make a living trading Betfair? sets realistic expectations.

Persistence and SP Options

Lay bets have the same persistence options as backs:

• Take SP: The unmatched portion is taken at Starting Price at the off, but at the maximum BSP your account allows.
• Keep: Unmatched portion stays alive in-running.
• Lapse: Default. Unmatched portion is cancelled at the off.

For first lays, leave on Lapse. Take SP and Keep have specific use cases that come later, including for lay-the-draw plays in football (covered in Lay the Draw Strategy).

Cancelling and Modifying Lay Bets

Unmatched lays can be cancelled at any time before they're matched. "My Bets" shows all unmatched orders. Once matched, you can't cancel — the only exit is to back the same selection at a price (the trading move). Read Swing Trading for the lay-then-back exit logic and Green Up Explained for closing out at a guaranteed profit across all outcomes.

Common Beginner Lay Strategies

Once you've placed 10-20 small lays for practice, three strategies use laying as a core mechanic:

• Lay the Draw (LTD). Pre-match, you lay the Draw outcome in a Match Odds market expecting goals to come. If a team scores, the draw price drifts and you can either close out for profit or let it run. Full guide.
• Trading the Favourite Pre-Race. Lay a horse racing favourite at the off, anticipating it will drift. If it does, back at the new price and lock profit. Risk: if it shortens further, you bleed liability. Trading the Favourite.
• Matched Betting Lay. Place a back bet at a bookmaker for a free-bet offer; lay the same selection on the Exchange to lock guaranteed profit regardless of outcome. How Matched Betting Works.

Laying vs Backing: Which Is Easier?

Honest take: laying is harder for beginners, for three reasons:

1. The maths is asymmetric. Backing wagers stake to win profit. Laying risks liability to win backer's stake. Internalising this takes practice.
2. Selection psychology. Picking what won't win is harder than picking what will. Most casual bettors have stronger intuitions about winners.
3. Long-tail risk. Laying outsiders is the single most expensive mistake a beginner can make. A 30/1 shot you "knew" wouldn't win that won = a year of trading wiped out.

That said, laying is structurally favourable when:

• The selection is mispriced too short relative to the true probability.
• You have specific information that narrows the field of likely winners (course form, in-running indicators).
• You're laying as the closing leg of a swing trade, not as a standalone bet.

Next Steps

Once you've placed your first lay bet:

• Place a £2 back bet on the same selection to feel the symmetry: How to Place a Back Bet.
• Practise reading liability across the ladder: Understanding the Ladder.
• Try a lay-then-back swing trade: Swing Trading Guide.
• Internalise the pillar: Betfair Exchange Beginner's Guide.
• If trading is the goal, read What Is Betfair Trading?
• Test software that makes lay-side ladder reading easier: Best Trading Software 2026.
• Check the lay-specific strategy work in Laying Horses if you favour racing.