Bet Builder Explained: How Same-Game Bets Work

A bet builder lets you combine several outcomes from the same match into one bet. For example, you could pick a team to win, both teams to score and a player to be booked, all on a single slip. It’s one of the most popular ways to bet on football in the UK. This guide explains how bet builders work, why the odds aren’t what you might expect and how to use bet builder free bets.

What is a bet builder?

A normal accumulator combines selections from different events. For instance, you might back three football teams to win in three different matches. A bet builder does the same thing, but every selection comes from one match or race.

Bookmakers use different names for it. You may see “bet builder”, “same game multi” or a brand’s own name. However, the idea is always the same: pick a few outcomes, and the bookmaker gives you one combined price.

Football is the most common sport for these bets. Typical legs include the match result, total goals, both teams to score, corners, cards and player markets such as goalscorers or shots on target. Many bookmakers also offer them on rugby, tennis, cricket and horse racing.

How bet builder odds are priced

This is the part that surprises most people. In a normal accumulator, the legs are independent. One match doesn’t affect another, so the bookmaker simply multiplies the odds together.

In a same-game bet, the legs are often correlated. That means one outcome makes another more likely. For example, if a striker scores, his team is more likely to win. Similarly, if there are lots of goals, both teams are more likely to score.

Because of this, bookmakers don’t just multiply the odds. Instead, they adjust the price to reflect how the legs relate to each other. When legs go together naturally, the combined price is usually lower than the simple multiplied figure. Conversely, legs that pull in opposite directions can occasionally price higher.

The exact adjustment is up to each bookmaker, so the same combination can be priced quite differently from site to site. Our odds comparison page is a good starting point for the main markets.

A worked example

The figures below are illustrative, not real prices, but they show how correlation works. Imagine a Premier League match where you like the home side.

If these were independent, a £10 bet would return £85.50. But the three legs are linked. A striker scoring makes a home win and more goals more likely. So the bookmaker might offer something nearer 6.00 instead, returning £60 from a £10 stake.

That lower price isn’t a mistake. It reflects the fact that the outcomes tend to happen together. The exact adjustment differs between bookmakers, which is why shopping around matters.

What happens to void legs?

A leg can be made void for several reasons. The most common is a player market where the player doesn’t take part. For example, you back a player to score, but he isn’t in the squad.

What happens next depends on the bookmaker’s rules:

• Leg removed. Many bookmakers remove the void leg and settle the bet on the remaining selections at recalculated odds.
• Whole bet void. Some void the entire bet and return your stake.
• Substitutes. Rules for players who come on as substitutes also vary, so check how they’re treated.

Always read the bookmaker’s rules for same-game bets before you place a bet with player legs.

Can you cash out a bet builder?

Many bookmakers offer cash out on these bets, but not all do, and it may not be available on every market. When it is offered, the amount depends on how the legs are going and the current prices.

Be careful with offers, though. Cashing out a qualifying bet often means it won’t count towards a welcome offer. Our qualifying bets guide explains the common rules.

Bet builder free bets

Some welcome offers include free bets that can only be used on same-game bets or accumulators. These are sometimes called restricted free bets. They work in the same way as other free bets: if the bet wins, you keep the winnings but not the stake.

Because these bets have bigger odds, a restricted free bet is more likely to lose, but it pays more when it wins. We factor this into the estimated value we show on every offer. You can see how in how we rate offers, and our guide to acca and bet builder free bets covers the details.

These are the current offers that include bet builder free bets. 18+, new customers only, T&Cs apply.

Compare every free bet offer →

Tips for better same-game bets

1. Keep it simple. Every extra leg adds another way to lose. Two or three legs are easier to follow than six.
2. Understand correlation. Don’t expect linked legs to price like an accumulator.
3. Compare prices. The same combination can be priced differently at different bookmakers.
4. Check team news. Player legs can be void or lose value if a player is left out.
5. Read the offer terms. Free bets may have minimum odds, a minimum number of legs or an expiry date.
6. Set a budget. Big odds are tempting, but only stake what you can afford to lose.

Want to go further? Our acca insurance guide explains a related type of promotion.

Bet builder FAQ

What is the difference between a bet builder and an accumulator?

An accumulator combines selections from different events, whereas a same-game bet combines selections from one event. Because those legs are often linked, the odds are adjusted rather than simply multiplied.

Why are bet builder odds lower than I expected?

The legs are usually correlated, so one outcome makes another more likely. The bookmaker reduces the combined price to reflect this.

What happens if my player doesn’t play?

It depends on the bookmaker. Many remove that leg and settle the rest, while others void the whole bet. Check the rules on the bookmaker’s site.

Can I use a free bet on a bet builder?

Often, yes. Some free bets are restricted to same-game bets, while others can be used on any bet. The offer terms will say which.

How many legs can a bet builder have?

It varies by bookmaker and sport. You need at least two legs, and some bookmakers allow many more. However, more legs means a lower chance of winning.

18+ only. Free bets and welcome offers are for new customers and T&Cs apply. Please gamble responsibly and only bet what you can afford to lose. If gambling stops being fun, visit our responsible gambling page or call the National Gambling Helpline on 0808 8020 133. Free advice is also available from BeGambleAware.org.