Hedging bets means placing a second bet on the other outcome of a bet you already hold, so you lock in a result or shrink what you could lose. For the same result whichever way the event goes, hedge stake = potential return of your first bet / the odds you take on the other side. A hedge is a bet in its own right, so it carries its own margin, and that margin is what the certainty costs.
Hedge betting usually follows a price move: your selection has shortened since you backed it, so your bet and a bet on the other side can now pay something together whatever happens. Every hedge here goes on before the game starts or the race jumps. Three cases have their own pages: hedging a futures bet, hedging a multi and the bookmaker's own buyback, in is cash out worth it.
How a hedge works on a two-way market
Example: illustrative prices, not a real game. Early in the week you backed Team A head to head for $60 at $3.40 with Bookmaker A, a potential return of 60 x 3.40 = $204. By game day Bookmaker B prices Team A at $1.95 and Team B at $1.85, and the game cannot end in a draw.
Before any hedge, your bet finishes 204 - 60 = +$144 ahead if Team A wins and -$60 if Team B wins. To finish level either way, back Team B for your potential return divided by its odds:
hedge stake = 204 / 1.85 = $110.27
| Result | $60 on Team A at $3.40 | $110.27 on Team B at $1.85 | Total |
|---|---|---|---|
| Team A wins | +$144.00 | -$110.27 | +$33.73 |
| Team B wins | -$60.00 | 110.27 x 0.85 = +$93.73 | +$33.73 |
It works because the hedge returns 110.27 x 1.85 = $204, the same as your first bet: you stake 60 + 110.27 = $170.27 in total and get $204 back either way.
Risk: Betting involves risk. The $33.73 exists only if Bookmaker B accepts the whole hedge at $1.85, and under its terms a bookmaker can refuse or cut a stake, void bets or close an account. See responsible gambling for limits and support.
Full hedge vs partial hedge
A full hedge makes every result the same. A partial hedge puts less on the other side, so one result stays bigger than the other. To get your stake back if your first bet loses, and keep the rest of the upside:
stake-back hedge = first stake / (hedge odds - 1) = 60 / 0.85 = $70.59
With the same illustrative prices:
| Hedge on Team B at $1.85 | If Team A wins | If Team B wins | What it does |
|---|---|---|---|
| None | +$144.00 | -$60.00 | The open bet |
| $55.14, half the full hedge | 144 - 55.14 = +$88.86 | -60 + 55.14 x 0.85 = -$13.13 | Cuts the loss, keeps most of the upside |
| $70.59 | 144 - 70.59 = +$73.41 | -60 + 70.59 x 0.85 = $0.00 | Your stake back if Team A loses |
| $110.27, the full hedge | +$33.73 | +$33.73 | The same either way |
| $130.00 | 144 - 130 = +$14.00 | -60 + 130 x 0.85 = +$50.50 | Over-hedged: now a bet on Team B |
Pick the row by the result you care about: a partial hedge keeps a stake in Team A while capping the damage, and anything past $110.27 turns into a bet against your own selection.
Risk: Betting involves risk. A partial hedge shrinks a loss only if it is accepted in full at the price you planned, the unhedged part can still lose, and there is no guarantee of profit. See responsible gambling for limits and support.
Hedging at a bookmaker vs laying on the exchange
On a betting exchange you can hedge by laying your own selection: betting that Team A will not win. Commission comes off your net winnings in that market at a rate the exchange sets, so treat it as an input. With your first bet at a bookmaker, only the lay pays commission, and the equal-result lay is:
lay stake = potential return / (lay odds - commission rate)
With Team A at $2.00 to back and $2.06 to lay on the exchange, and an illustrative 6% commission: lay stake = 204 / (2.06 - 0.06) = 204 / 2.00 = $102.00. Its liability is 102 x 1.06 = $108.12.
| Result | $60 on Team A at $3.40 | Lay $102.00 at $2.06 | Total |
|---|---|---|---|
| Team A wins | +$144.00 | -$108.12 | +$35.88 |
| Team B wins | -$60.00 | 102 x 0.94 = +$95.88 | +$35.88 |
Here the lay locks in 35.88 - 33.73 = $2.15 more than Bookmaker B, a result of these prices rather than a rule. The two routes differ in ways that can move the answer:
| Back the other side at a bookmaker | Lay your selection on the exchange | |
|---|---|---|
| What it costs | The bookmaker's margin, built into its odds | Commission on net winnings, plus the gap between the back and lay prices |
| Money you need | The hedge stake, $110.27 | The liability, $108.12 |
| Getting it on | A bookmaker can refuse or cut the stake | Someone must match your lay, and part can stay unmatched |
| Three or more outcomes | One bet on each other outcome | One lay covers every other outcome |
| Settlement | The bookmaker's terms | The exchange's market rules |
If both of your bets are on the exchange, commission falls on the net result of the market and the sum is simpler: how to green up works it through. Lay betting explained starts from what a lay is and what it can cost.
Risk: Betting involves risk. A lay must be matched in full at your price before the start, and its liability is held from your exchange balance until the market settles. See responsible gambling for limits and support.
What a hedge costs in margin
A hedge is a new bet, usually with a negative expected value. Measure its cost by comparing what it locks in with your first bet's expected profit at fair prices.
Suppose, for illustration, you put Team A's fair chance at 50%, a fair price of $2.00 for each team. Your bet is then worth 204 x 0.5 = $102 on average, an expected profit of 102 - 60 = $42.00. A hedge at fair prices would lock in all $42.00. Real hedges lock in less:
| Hedge | Locks in | Cost against $42.00 | Working |
|---|---|---|---|
| A fair price, no margin | $42.00 | $0.00 | none |
| Lay at $2.06 with 6% commission | $35.88 | $6.12 | 102 x (0.5 x 1.06 - 0.5 x 0.94) |
| Back Team B at $1.85 | $33.73 | $8.27 | 110.27 x (1 - 0.5 x 1.85) |
For a hedge at a bookmaker, cost = hedge stake x (1 - fair chance of the hedge winning x hedge odds).
Every cost here moves with your estimate. Removing Bookmaker B's margin in proportion gives Team A (1 / 1.95) / (1 / 1.95 + 1 / 1.85) = about 48.7%, and a lower chance for Team A makes both real hedges cheaper.
In every row, the amount locked in is your bet's expected profit at fair prices less the hedge's own cost. Hedging does not change what your first bet was worth: it swaps an uncertain result for a fixed one and charges the hedge's margin for the swap. Fifty hedges like the Bookmaker B one give up 50 x 8.27 = $413.50 of expected value.
The cost becomes a gain only when the hedge price is longer than fair. If another bookmaker offered Team B at $2.04 against your fair $2.00, the full hedge of 204 / 2.04 = $100.00 would lock in 144 - 100 = $44.00. That is $2.00 more than the bet's expected profit at fair prices. Fair odds explains how to estimate a fair price, and bookmaker margin shows where the cost comes from.
Risk: Betting involves risk. A fair price is only an estimate, a hedge that looks cheap against a wrong estimate can cost more than it seems, and there is no guarantee of profit. See responsible gambling for limits and support.
When not to hedge
Skip the hedge, or hedge only part, when:
- You would still take your first bet at today's price. If Team A at $2.00 still looks like value to you, a full hedge sells that view back below fair.
- The other side carries a wide margin. A race is the extreme case: hedging one runner at bookmakers means backing every other runner, paying the market's overround on all of those stakes, where one exchange lay covers the field.
- The amount at risk is one you can afford to lose. Hedging every bet that shortens repeats the cost each time, $8.27 a time in the Bookmaker B example.
- The two sides could settle the same result differently, as a draw, a dead heat or a late scratching can.
- The hedge stake or liability would tie up money you need.
The decision rule: hedge when a fixed result matters more to you than the hedge's cost, and leave the bet alone when you would back your selection again at today's price.
Edge cases that leave a hedge uneven
- A draw, in a sport where one can happen. Under the NSW Bookmaker Declared Betting Events Betting Rules, which cover bets with bookmakers authorised in NSW, a draw makes every bet on another result a loser where a draw price was offered (rule 5.1.7). A two-bet hedge like this one would then lose 60 + 110.27 = $170.27. With no draw price offered, a two-team draw pays each ticket half its face value (rule 5.1.8), and two tickets of $204 stay level. Other bookmakers set their own terms, so read them for both bets.
- Dead heats in racing. A bookmaker's terms and an exchange's rules can split a dead heat differently; dead heat rules works the sums.
- Late scratchings. Stewards can declare a deduction, in cents in the dollar, on winning fixed-odds bets placed before a scratching. An exchange adjusts matched bets under its own rules, so the two halves of a racing hedge can shift by different amounts. Scratchings and deductions explains the figures.
- Part matched. A lay only partly matched before the start is a partial hedge you did not plan: work out both results again.
- Voids. An abandoned game or a cancelled bet can void one side and leave the other as an open bet.
How to hedge a bet in five steps
- Write down what your first bet pays in each result: its potential return if it wins, and its stake if it loses.
- Find the best price on the other side: each bookmaker's odds on the other outcome, and the exchange's lay price (not its back price) on your own selection.
- Choose a full or partial hedge and work out the stake with its formula or the hedge calculator.
- Work out every result by hand before you place anything. They should agree to within a cent or two.
- Place the hedge before the game starts or the race jumps, then check how much was accepted or matched.
Two sizing mistakes split the result. Sizing the lay with the $2.00 back price gives 204 / (2.00 - 0.06) = $105.15, which, matched at $2.06, leaves +$32.54 if Team A wins and +$38.84 if it loses. Leaving commission out gives 204 / 2.06 = $99.03: +$39.03 if Team A wins and +$33.09 if it loses. Sized correctly, it is $35.88 either way.
Where B337 fits
The Terminal lines up prices from 40+ bookmakers across racing and sports with Betfair back and lay in the same view. Where your market is listed, you can compare the other side at the bookmakers that price it with the exchange's lay price before you hedge. The columns follow the market, because not every bookmaker prices every race or game. B337 does not place exchange bets or hedge: any hedge is yours to place, in your own accounts. Prices are read on a repeating cycle, so confirm the price with the bookmaker or the exchange before you place the hedge. A free account opens a limited view of the Terminal with live odds. Bookmaker names are trade marks of their owners. B337 is not affiliated with them.
Risk: Betting involves risk. Prices move between the screen and the bet slip, and a hedge fixes your result only when every part of it has gone on at the price you planned. See responsible gambling for limits and support.