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Back vs Lay: How a Betting Exchange Actually Works

The word "exch" in 99exch is short for exchange — and that single idea changes how every bet you place behaves. Here is a plain-English walkthrough of backing, laying and liability.

29 Jul 20266 min read99exch Team

If you have only ever placed bets with a traditional bookmaker, a betting exchange can feel unfamiliar at first. The interface shows two coloured columns instead of one price, and you are suddenly asked whether you want to "back" or "lay" a selection. Once the idea clicks, though, most people find an exchange far more transparent than a fixed-odds bookmaker — because you can see exactly who is willing to take the other side of your bet.

This guide breaks down the core mechanics of 99exch (you will also see the brand written as 99exchange) so a first-time user can read a market with confidence. Nothing here is a promise of profit — betting always carries risk — but understanding the plumbing helps you make calmer, better-informed decisions.

What is a betting exchange?

A traditional bookmaker sets the odds and takes every bet against you: if you win, they pay; if you lose, they keep your stake. A betting exchange works differently. It is a peer-to-peer marketplace where users bet against each other, and the platform simply matches the two sides and takes a small commission on net winnings.

That means for every person who thinks India will win a match, there has to be someone on the other side who is prepared to accept that bet. The exchange pairs them up automatically. Because prices are driven by real supply and demand between users, exchange odds often move quickly and can be sharper than a bookmaker's fixed line.

Backing: the familiar side

Backing is the bet you already know. When you back a selection, you are betting that it will happen — a team wins, a batter passes a runs total, a specific score lands. If the outcome comes in, you win at the odds you took; if it does not, you lose your stake.

On 99exch this is the blue side of a market. A back bet of ₹1,000 at odds of 2.0 would return your ₹1,000 stake plus ₹1,000 profit if it wins (before commission). If it loses, the amount at risk — your liability — is simply the ₹1,000 you staked. Nice and simple.

Laying: betting against an outcome

Laying is the part that is unique to an exchange, and it is worth taking slowly. When you lay a selection, you are betting that it will not happen. In effect, you step into the shoes of the bookmaker: you accept someone else's back bet.

If you lay "Team A to win" and Team A loses (or the match is drawn), you keep the backer's stake as your profit. If Team A wins, you have to pay out — and that payout is your liability. This is the key difference beginners must internalise: when you lay, your potential loss is usually larger than the amount you stand to win.

Understanding liability

Liability is just a word for "the amount you could lose". How it is calculated depends on which side you are on:

Bet typeYou are betting…Your liability
Backthe outcome will happenyour stake
Laythe outcome will not happenstake × (odds − 1)

So if you lay a selection for ₹1,000 at odds of 3.0, your liability is ₹1,000 × (3.0 − 1) = ₹2,000. You win ₹1,000 if the selection loses, but you risk ₹2,000 if it wins. The exchange always shows this figure before you confirm, so you never lay blind — but it is your job to read it.

Quick habit: before confirming any lay bet, glance at the liability box and ask yourself, "Am I comfortable losing this exact amount?" If the answer is no, reduce your stake or pick different odds.

Matched vs unmatched bets

Because an exchange needs two willing sides, your bet is not live until someone accepts it. You will see two states:

  • Matched — another user has taken the opposite side at your price. The bet is now active and will settle when the event finishes.
  • Unmatched — no one has accepted your price yet. Your money is reserved but the bet is not working. You can wait for the market to come to you, or edit the odds to the price currently on offer so it matches straight away.

This is why exchange prices can look like a live order book: the available odds simply reflect what other users are offering right now. If you ask for a better price than the market, you wait; if you accept the market price, you match instantly.

Why exchange odds move

On a fixed-odds site, a price only changes when the bookmaker decides to change it. On an exchange, odds shift continuously as users place, edit and cancel bets — especially during live cricket, where a single boundary or wicket can send a market swinging. That volatility is an opportunity for experienced traders and a trap for anyone chasing losses, so treat fast-moving in-play markets with respect.

Practical tips for new 99exch users

  • Start by backing. It behaves like a normal bet, so you can learn the interface without worrying about liability maths.
  • Practise with a demo first. You can request a free demo ID to explore the markets before committing real funds.
  • Read the liability box every time you lay — treat it as a compulsory step, not an afterthought.
  • Set a budget before you log in and stop when you reach it. The exchange will not do this for you.
  • Keep records. Reviewing your matched bets teaches you more than any tips channel.

A note on responsible play

A betting exchange gives you more control and more transparency, but it does not change the fundamentals: outcomes are uncertain and losing runs happen to everyone. Bet only with money you can afford to lose, never chase a loss, and take a break if it stops being fun. Our responsible gaming page has tools and links if you ever need them. This platform is strictly for users aged 18 and above.

Want a walkthrough of your first market on 99exch? Message our team on WhatsApp and we will help you read the back and lay columns step by step, or set you up with a 99exch ID when you are ready.

Frequently asked questions

What is the difference between backing and laying? expand_more
Backing means betting that something will happen — a team wins, a batter reaches a total. Laying is the opposite: you bet that the outcome will not happen, effectively taking the role a bookmaker normally plays. On a betting exchange you can do either side.
Is 99exch a betting exchange or a bookmaker? expand_more
99exch (also written 99exchange) is a betting exchange. Instead of only betting against the house, you can back or lay a selection, and your bet is matched against another user who wants the opposite side.
What does liability mean on a betting exchange? expand_more
Liability is the amount you could lose if a bet goes against you. When you back a selection your liability is your stake. When you lay a selection your liability is the stake multiplied by the odds minus one, because you would have to pay out the backer if the outcome happens.
Why is my bet showing as unmatched? expand_more
An unmatched bet means no other user has yet accepted the opposite side at the odds you requested. You can wait for the market to reach your price, or edit your bet to the currently available odds so it matches.
Do I need experience to use a betting exchange? expand_more
No. Backing works much like a normal bet, so beginners usually start there and explore laying once they are comfortable. You can also request a free demo ID to practise the interface before using real funds. This platform is for users aged 18 and above only.

Ready to read your first market?

Chat with the 99exch team on WhatsApp for a guided walkthrough of back and lay — no pressure, no jargon.

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Beyond the basics: exposure, hedging and reading the price ladder on an exchange

The article above gives you the vocabulary: back, lay, liability, matched and unmatched. This section is for the moment after that, when you are looking at a live market with a bet already placed and wondering what the numbers on the screen now mean. It covers how the exchange calculates what you can lose across a whole market, how to close a position before the event ends, why prices move in fixed steps, and the mistakes that catch almost every new 99exch user at least once.

As always, a line about who is writing: 99exch.in is an ID provider and authorised agent for 99exch (99exchange) IDs. We do not run the exchange or set its prices, and nothing below is a way to guarantee a profit. It is a way to understand exactly what you are risking, which is the foundation of every calm decision.

Exposure: what the market screen is really telling you

Once you have a bet in a market, the exchange stops thinking in terms of individual bets and starts thinking in terms of your position: what you would win or lose on each possible outcome, with every matched bet in that market added together. The small green and red figures beneath each selection are that position. Green is profit if that selection wins; red is loss.

Consider a cricket match with three outcomes: Team A, Team B and the draw. If you back Team A for ₹500 at 2.0, the screen shows +500 under Team A and -500 under both Team B and the draw. Now suppose you also lay the draw for ₹200 at 5.0. The lay adds +200 to Team A and Team B, and -800 (200 x 4) to the draw. Your combined position becomes +700 on Team A, -300 on Team B, and -1,300 on the draw.

Two things follow from this that the article above does not cover:

  • Your worst-case figure across the market, here -1,300, is what the exchange reserves from your balance. It is not the sum of your stakes. Available balance falls by the largest red number, not by every bet added together.
  • A bet that looks small on its own can move your worst case a great deal if it lands on the outcome where you were already most exposed. Always look at the position figures, not just the bet slip, before confirming.

Learning to read those figures at a glance is the single most useful habit for anyone moving beyond the first few bets. On a demo ID you can place a handful of bets and watch the numbers change with no money at risk.

Closing a position early: the idea behind hedging and cash out

Because an exchange lets you take both sides of a market, you can close a bet before the event finishes by placing the opposite bet. If you backed a team and the price has shortened, laying the same team at the new lower price can lock in a profit whichever side wins. If the price has drifted against you, laying can cap your loss. The cash-out button on many platforms does exactly this automatically; doing it by hand simply gives you control over the stake and the price.

A worked example with round numbers. You backed Team A for ₹1,000 at 3.0 before the match. Team A starts well and the lay price falls to 1.5. You now lay Team A for ₹2,000 at 1.5.

OutcomeBack bet (₹1,000 at 3.0)Lay bet (₹2,000 at 1.5)Net position
Team A wins+2,000-1,000 (liability 2,000 x 0.5)+1,000
Team A does not win-1,000+2,000+1,000

The lay stake that produces an equal profit on both sides is your back stake multiplied by the back odds, divided by the lay odds: 1,000 x 3.0 / 1.5 = 2,000. If you had laid a smaller amount you would have kept more upside on Team A and less protection on the other side; a larger lay would tilt the other way. There is no correct answer; it depends on how much certainty you want to buy.

Three cautions. Hedging is only possible if your lay is matched, so in a fast in-play market the price may move before it fills. Commission on your net winnings still applies. And the example works because the price moved in your favour; if it moved against you, the same technique locks in a smaller loss rather than a profit, which is often the wiser choice than hoping.

The price ladder and why odds move in steps

Exchange prices do not move smoothly; they move in fixed increments called ticks, and the size of a tick grows as the odds grow. Near even money the steps are tiny; at longer prices they become larger. This is why you may find you cannot request a price of, say, 3.07: the ladder simply does not have a rung there, and the platform will move your request to the nearest valid price.

A typical ladder looks something like this (the exact bands are set by the exchange and may differ):

Price rangeStep between pricesExample valid prices
1.01 to 2.00.011.85, 1.86, 1.87
2.0 to 3.00.022.10, 2.12, 2.14
3.0 to 4.00.053.05, 3.10, 3.15
4.0 to 6.00.14.1, 4.2, 4.3
6.0 to 100.26.2, 6.4, 6.6
Above 100.5 and larger15.5, 16.0, 16.5

Why this matters in practice: the gap between the best back price and the best lay price is called the spread, and it is measured in ticks. On a liquid IPL match odds market the spread is often a single tick. On a small kabaddi market it might be several. A wide spread tells you that matching at a good price will be slow, and that closing a position later may cost you more than you expect.

Partial matching and the average price

When your stake is larger than the money available at the best price, the exchange fills as much as it can and leaves the remainder unmatched. If the market then moves and your remaining stake is filled at a different price, your position shows an average. A ₹1,000 back with ₹600 matched at 2.0 and ₹400 at 1.96 gives an average price of roughly 1.98 on the full stake.

You have three choices with an unmatched remainder:

  1. Leave it. It sits in the queue and fills if the market comes back to your price. During a live match this can happen suddenly after a wicket or a boundary.
  2. Edit it. Change the requested price to the current best price and it fills at once, at slightly worse terms.
  3. Cancel it. The reserved money returns to your available balance immediately.

One point that surprises people: an unmatched bet does not disappear when the market suspends. Depending on the platform's rules, in-play suspensions may cancel unmatched bets or keep them. Check the "keep" setting if your platform offers one, and check your unmatched list after every suspension rather than assuming.

Laying the favourite versus backing the field

Beginners often ask whether laying a favourite is the same as backing every other outcome. In a two-outcome market, effectively yes. In a three-outcome market such as a cricket match with a draw, the difference is real. Laying Team A is one bet with one liability; backing both Team B and the draw is two bets that need two prices and two matches, and your profit depends on which of the two wins.

Where laying earns its keep is in situations where you have a view that the favourite is overpriced but no strong view about which alternative will happen. The cost is the liability: laying a strong favourite at a short price risks a lot to win a little, and laying an outsider at a long price risks a great deal on an outcome that may still come in. Before laying anything above about 4.0, work out the liability in rupees, write it down, and ask whether you would place that amount as a back bet on the other side. If not, the lay is too large.

The market screen makes this easy to check. After entering a lay, look at the red figure under the selection you are laying. That is your answer.

Common mistakes on a 99exch market and how to avoid them

MistakeWhy it happensFix
Backing when you meant to layBlue and pink columns sit side by side; a rushed tap lands on the wrong oneRead the bet slip header before confirming; it says Back or Lay in words
Confusing stake with liability on a layThe stake box is what you type; liability is shown separatelyLook at the liability figure every time, without exception
Betting during a suspensionA wicket or goal closes the market for a momentWait for the market to reopen; a rejected bet is not an error
Leaving an unmatched bet forgottenThe remainder fills later at a price you no longer wantCheck the unmatched list after every bet and cancel what you no longer need
Adding bets without reading the positionEach new bet changes the worst case across the marketRead the green and red figures under each selection before confirming
Chasing a moving price in-playRepeatedly editing to the current price after each moveDecide the worst price you will accept before the match and stop there
Hedging too early or too lateTrying to time the perfect priceSet a target price in advance; take it when it arrives

A checklist for your first lay bet

Do this once, slowly, with a small stake, and the process becomes automatic. A demo ID is the ideal place for the first run-through.

  1. Open a liquid market such as match odds on a major cricket fixture; avoid thin markets for your first lay.
  2. Find the selection you believe will not win and tap the pink price beside it.
  3. Enter a small stake, for example ₹100, and confirm the bet slip header says Lay.
  4. Read the liability figure. Say it aloud: "I could lose this much." If it is more than you accept, reduce the stake.
  5. Look at the position figures under every selection to see how the market will settle for you on each outcome.
  6. Confirm the bet, then check whether it is matched or unmatched.
  7. If unmatched, decide now whether to wait, edit or cancel; do not leave it to chance.
  8. After the event, open your account statement and confirm the settlement matches what the position figures showed. If it does not, note the market and time and message our support.

Repeat the process a few times on the demo before using real funds. Once the liability check feels boring, you are ready.

A final habit that separates careful 99exchange users from careless ones: after every session, open the account statement and match each settled bet against the ledger line you wrote before placing it. Unexpected differences are almost always a partial match at a different average price or a lay whose liability you misread, and both are easier to catch on a quiet evening than in the middle of the next match.

18+ only. Exchange betting involves financial risk, and laying can expose you to losses much larger than your stake. Bet only with money you can afford to lose, set limits before you open a market, and read our responsible gaming page for tools that help you stay in control.

Frequently asked questions

What do the green and red numbers under each selection mean?

They show your net position in the market: what you win (green) or lose (red) if that selection wins, with all your matched bets in the market combined. The largest red figure is what the exchange reserves from your balance.

How is my available balance calculated when I have open bets?

Your available balance is your total balance minus your worst-case exposure across each open market. It is not reduced by the sum of all stakes, because bets on different outcomes in the same market cannot all lose at once.

What lay stake locks in an equal profit after a back bet?

Back stake multiplied by the back odds, divided by the current lay odds. For ₹1,000 backed at 3.0 with the lay price now 1.5, the lay stake is 2,000, producing a profit of ₹1,000 on either outcome before commission.

Why can I not enter the exact price I want?

Exchange prices move in fixed steps called ticks, and the step size grows with the odds. If the price you type is not on the ladder, the platform moves it to the nearest valid price.

What happens to an unmatched bet when the market suspends?

It depends on the platform's rules and any keep setting you have chosen. Some cancel unmatched bets at suspension, others keep them. Check your unmatched list after every suspension rather than assuming.

Is laying a favourite the same as backing everything else?

In a two-outcome market, effectively yes. In a three-outcome market such as a cricket match with a draw, laying is one bet with one liability while backing the alternatives is two separate bets with two prices.

Does hedging always produce a profit?

No. Hedging locks in whatever the market currently offers. If the price has moved in your favour it locks in a profit; if it has moved against you it locks in a smaller loss. Both can be sensible.

What is a partially matched bet?

A bet where only part of your stake found a match at the requested price. The matched part is live; the rest waits in the queue until you edit, cancel or the market comes back to your price.

Why did my hedge not fill during a live match?

In-play prices move quickly and a market suspends after every key event. A lay placed at a price that has already moved sits unmatched. Enter the hedge at the current best price if you want it filled immediately, or set a target price in advance and accept that it may not be reached.

Does 99exch.in handle bet settlement?

No. 99exch.in is an ID provider and authorised agent. Settlement is done by the exchange under its market rules. We can help you locate the rules text and escalate a query, but we do not decide results.

The next step after understanding positions is deciding how much of your money any single position should ever represent; our blog has a bankroll guide on exactly that. If you would like to practise the checklist above with no money at stake, the 99exch demo ID page explains how to get one, and the sports betting page covers the markets you will find beyond cricket.