AI Bet types · Updated 5 Aug 2026
Treble bet explained: three selections, one stake
A treble puts three selections into one bet. All three must win, and the odds multiply together, which is why a small stake can return a large sum and why it loses more often than a single.
A treble is one bet on three selections. Each selection comes from a different event, all three have to win, and the winnings from the first selection roll on to the second and then the third. That rolling-on is what makes the payout grow quickly: the odds of the three selections are multiplied together rather than added.
Trebles are common in football, where people pick three match results on a Saturday, and in racing, where they might back three horses across an afternoon card. It is the smallest accumulator after the double, and it shares the same trade-off as every acca: a bigger potential return in exchange for a much lower chance of landing.
How a treble is calculated
The quickest method uses decimal odds. Multiply the three decimal prices together, then multiply by the stake. The result is your total return, stake included.
If you work in fractional odds, convert each price first by adding 1: 2/1 becomes 3.0, 6/4 becomes 2.5, evens (1/1) becomes 2.0. You can also do it the long way, rolling the winnings through each leg in turn, and you get the same answer.
Worked example: a £10 football treble
Three Saturday selections:
- Team A to win at 2/1 (decimal 3.0)
- Team B to win at 6/4 (decimal 2.5)
- Team C to win at evens, 1/1 (decimal 2.0)
Decimal method: 3.0 x 2.5 x 2.0 = 15.0. A £10 stake returns £10 x 15.0 = £150, which is £140 profit.
Rolling method, fractional odds:
- Leg 1: £10 at 2/1 returns £10 + £20 = £30.
- Leg 2: that £30 goes on at 6/4, returning £30 + £45 = £75.
- Leg 3: that £75 goes on at evens, returning £75 + £75 = £150.
Same result, £150. Combined, the treble is priced at 14/1 (15.0 in decimal).
The same selections as three singles
Compare that with £10 on each selection as a single, a £30 outlay:
- All three win: £30 + £25 + £20 = £75 returned.
- Two win (A and B): £30 + £25 = £55 returned, a profit of £25.
- One wins (C only): £20 returned, a loss of £10.
The treble pays twice as much when everything goes right, for a third of the outlay. If any one selection fails, it returns nothing.
How the chances shrink
The bookmaker’s odds imply a probability for each leg. In the example, 2/1 implies 33.3%, 6/4 implies 40% and evens implies 50%. If the three results are independent, the chance of all three winning is 0.333 x 0.40 x 0.50, roughly 6.7%, or about one in fifteen.
That is the same number as the combined decimal price, 15.0, which is the point: the treble odds are fair to the bookmaker’s own prices, but each price already includes the bookmaker’s margin, and multiplying three prices together multiplies the margin too. Our guide to betting odds explained shows how to read that margin from a set of odds.
Treble returns at common prices
| Leg 1 | Leg 2 | Leg 3 | Combined decimal odds | £5 treble returns | £10 treble returns |
|---|---|---|---|---|---|
| 1/2 (1.5) | 1/2 (1.5) | 1/2 (1.5) | 3.375 | £16.88 | £33.75 |
| Evens (2.0) | Evens (2.0) | Evens (2.0) | 8.0 | £40.00 | £80.00 |
| 2/1 (3.0) | 6/4 (2.5) | Evens (2.0) | 15.0 | £75.00 | £150.00 |
| 2/1 (3.0) | 2/1 (3.0) | 2/1 (3.0) | 27.0 | £135.00 | £270.00 |
| 5/1 (6.0) | 3/1 (4.0) | 2/1 (3.0) | 72.0 | £360.00 | £720.00 |
Three odds-on favourites at 1/2 return just over three times the stake, which surprises a lot of people. Short prices multiply into short prices.
Void legs, non-runners and dead heats
Void or non-runner. If one selection is void (a postponed match, a non-runner), that leg is usually settled at odds of 1.0. The treble then pays as a double on the other two. In the worked example, if Team C’s match is postponed, the bet becomes 3.0 x 2.5 = 7.5, and £10 returns £75.
Dead heat. In racing, if your horse dead-heats for first, the stake on that leg is normally halved, or the odds divided, depending on the bookmaker’s rules. That cuts the treble return accordingly.
Rule 4. If a horse in one of your races is withdrawn late, a Rule 4 deduction can reduce the odds on your selection in that race, and the reduced figure flows through the treble.
Treble, trixie and patent
A treble is often confused with full-cover bets built on the same three selections.
- Treble: 1 bet. All three must win.
- Trixie: 4 bets (3 doubles + 1 treble). Pays something if any two win. A £1 trixie costs £4.
- Patent: 7 bets (3 singles + 3 doubles + 1 treble). Pays something if any one wins. A £1 patent costs £7.
The extra bets give you cover, but you pay for every one of them. Our bet calculator works out trebles, trixies and patents, each way included, if you want to compare the returns before you choose.
Trebles and welcome offers
Several sign up offers come as acca free bets, and the minimum number of selections decides whether a treble qualifies. Betano’s football acca free bet needs 3 or more selections, so a treble fits. BetMGM’s two football acca free bets need 4 or more legs, and its two sports multiples need 2 or more. Bet442’s Bet Builder free bets are a different format again: four legs from one match at combined odds of 3/1.
Remember too that free bet stakes are usually not returned. A £10 free bet treble at combined odds of 15.0 pays £140, not £150. Our comparison of new betting sites offers lays out the selection rules for each offer.
When a treble is a sensible bet
A treble is a reasonable choice when you have three opinions you are confident in and want a bigger return from a small stake. It is a poor way to chase losses, and adding a fourth or fifth leg to “make it worth it” lowers the chance of a return far faster than most people expect.
For the rest of our bet type explainers see the betting guides hub, and for where to place the bet, this month’s racecard of new bookmakers compares licence, offers and stated payout windows.
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What is a treble bet?
A treble is a single bet on three selections from different events. All three must win for the bet to pay, and the returns are worked out by multiplying the decimal odds of the three selections together and then by the stake.
What happens if one leg of my treble loses?
The whole bet loses. A treble has no partial payout, which is the main difference from three singles or a trixie. If you want something back when two of three win, you need a bet type that includes doubles.
What happens if one selection is void or a non-runner?
That leg is normally treated as a winner at odds of 1.0, so the treble becomes a double on the remaining two selections. A £10 treble with one void leg pays as a £10 double on the other two.
Can I put two selections from the same match in a treble?
Usually not as a standard treble, because the results are linked. Combining several markets from one match is what a Bet Builder does, and bookmakers price that differently.
What is the difference between a treble and a trixie?
A treble is one bet. A trixie is four bets on the same three selections: three doubles and one treble, so a £1 trixie costs £4. It pays something if any two selections win, while a treble needs all three.
Does a treble count for an acca free bet?
It depends on the minimum number of selections. Betano's acca free bet needs 3 or more selections, so a treble meets it. BetMGM's football acca free bets need 4 or more legs, so a treble does not.
Is a treble better value than three singles?
Not in itself. A treble pays more when all three win but loses entirely if one fails, and the bookmaker's margin is built into each leg, so it compounds across the three. It suits people who want a bigger return from a small stake and accept that it will lose more often.
