- What a parlay bet means
- How parlay odds are combined
- Pushes, voids and how a parlay is settled
- Same-game parlays and other parlay variations
- Why a parlay is harder to win than a single bet
- Age limits and the law on parlay betting
- Gambling support and staying in control
- Writing about sports betting markets
- Frequently asked questions
A parlay is a single bet that combines two or more selections, called legs, and every leg must win for the bet to win. The odds of each leg are multiplied together, so returns can be large, but each extra leg lowers the chance of winning. In the UK, the same bet is usually called an accumulator.
If you've watched American sport or seen US betting adverts, you'll have come across the word parlay. It's one of the most talked-about bet types in the US, and it often confuses UK readers, who know the same idea by a different name. This guide explains what a parlay is, how one is settled and why the odds look so tempting.
This is a neutral explainer for adults, built from Caesars Sportsbook's betting guides, Wikipedia's articles on parlays, odds and US sports betting, the Gambling Commission and GambleAware. It isn't a recommendation to bet, and you won't find tips here. If gambling's causing you any worry, the support section near the end lists free, confidential help.
What a parlay bet means
Caesars defines it simply: parlay betting combines two or more individual wagers into a single bet. Each selection inside the bet is called a leg. Wikipedia notes that the same bet goes by several names, including accumulator, acca, combo bet and multi. In the UK, you'll mostly hear accumulator, which I cover in my guide to what an accumulator bet is.
The defining rule is that every leg has to win. Caesars puts it plainly: one losing leg loses the entire bet, however many of the other legs won.
How parlay odds are combined
Parlays are usually explained with decimal odds because the maths is easier. Wikipedia's article on odds explains that decimal odds include the original stake, so the total return on a single bet is the stake multiplied by the decimal odds. For a parlay, Caesars says the odds of each leg are converted to decimal and multiplied together across the ticket.
Worked example (illustrative odds only): imagine three legs with decimal odds of 2.00, 1.50 and 3.00. Multiply them and you get combined odds of 9.00. A stake of 10 units would return 90 units in total if all three legs won, and nothing at all if any one of them lost.
| Outcome (same illustrative example) | What happens to the parlay |
|---|---|
| All three legs win | Settled at combined odds of 9.00, so 10 units returns 90 units |
| Any one leg loses | The whole parlay loses and the stake is gone |
| One leg pushes or is void, the other two win | That leg is removed, leaving 2.00 x 3.00 = 6.00, so 10 units returns 60 units |
Pushes, voids and how a parlay is settled
Not every leg ends in a clean win or loss. Caesars' guide explains two common situations:
- Push. A push is a tie on a spread or total, where the result lands exactly on the line. Caesars says most sportsbooks remove that leg and settle the parlay as if it had one fewer selection, so a three-leg parlay with one push is treated as a two-leg parlay.
- Void. If a leg is voided, for example because a game is postponed or a prop is cancelled, it's removed and the parlay drops by one leg. A two-leg parlay with one voided leg settles as a single bet.
Rules can vary between operators, so the sportsbook's own terms always decide how a particular bet is settled.
Same-game parlays and other parlay variations
A same-game parlay, often shortened to SGP, combines two or more bets on one game into a single wager. Caesars gives examples such as a team's moneyline, the game total and a quarterback's passing yards in the same match. Every leg must still win.
Because those legs are linked, Caesars explains that the sportsbook sets the combined odds using a correlation model rather than simply multiplying each leg, and correlated legs usually see the return adjusted downward. Some combinations may be restricted, and state rules can limit which markets are eligible. Wikipedia adds that traditional bookmakers usually didn't allow correlated parlays, while newer mobile apps often do.
- Teasers let you move point spreads or totals in your favour in exchange for lower odds. Caesars says they're most often used in football and basketball.
- Round robins take three or more selections and create every smaller parlay combination from them, each as a separate wager, so the total stake is higher.
Why a parlay is harder to win than a single bet
The big combined odds aren't a gift. They're high because every extra leg is another result that has to go your way, and each one you add lowers the chance that the whole bet wins. Wikipedia also notes that bookmakers often settle parlays at less than the true odds would suggest, describing the house edge as increasing in parlays.
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That's why a parlay can look like a small stake for a big return while being far less likely to come in than any of its legs on their own. It's worth seeing the combined odds as a measure of how unlikely the full set of results is.
Age limits and the law on parlay betting
- Great Britain: the Gambling Commission says that in most cases the minimum legal age for gambling is 18, which covers betting shops and online gambling.
- United States: legality depends on the state. Wikipedia notes that after the Supreme Court's Murphy v. NCAA decision in 2018, each state is free to regulate or prohibit sports betting within its borders. Caesars, for example, requires users to be 21 or older and located in a state where it operates legally.
- Elsewhere: rules and age limits vary by country, so check the local regulator.
Gambling support and staying in control
If gambling stops being fun, or you're worried about someone else's betting, free help is available. GambleAware offers free, confidential support in Great Britain 24/7 by phone or online chat. The National Gambling Helpline, run by GamCare, is free on 0808 8020 133, 24 hours a day.
- Only use money you'd spend on other entertainment, and never chase losses.
- Decide on limits for your time and stakes before you start.
- Take a break if betting is affecting your mood, sleep, relationships or work.
- Talk to someone. A helpline adviser, your GP or a counsellor can help.
Writing about sports betting markets
Clear, neutral explanations of how bets work help readers understand what they're signing up to. If you write about odds, markets and responsible gambling, there are sites looking for that expertise.
Sports writers with a betting focus can browse betting blogs that take contributed articles.
Frequently asked questions
Is a parlay the same as an accumulator?
Yes, it's the same idea. Wikipedia lists accumulator, acca, combo bet and multi as other names for a parlay. Parlay is the usual US term and accumulator the usual UK one.
What happens if one leg of a parlay loses?
The whole bet loses. Caesars says one losing leg loses the entire parlay, regardless of how many other legs won.
What happens if a parlay leg is a push?
Caesars says most sportsbooks remove the pushed leg and settle the parlay with one fewer selection, so the combined odds drop.
What is a same game parlay?
It's a parlay where every leg comes from one game, such as a team result, the game total and a player's statistic. The sportsbook adjusts the odds because the legs are linked.
How old do you need to be to bet on a parlay?
In Great Britain, the minimum age for betting and online gambling is 18. In the US it depends on the state and the operator, and Caesars requires users to be 21 or older.
