Free bets: what one is really worth

The short version

A free bet is a bet credit from the bookmaker, and its stake never comes back to you. If it wins, you get the net profit. If it loses, you get nothing, and none of your own money has moved.

So it's worth less than the amount shown, and the gap widens as the odds shorten. Terms nearly always come with it: minimum odds, an expiry date, excluded markets.

A free bet doesn't change the probability that a bet wins. It changes what you lose when it loses: none of your own money, on that one bet.

What is a free bet?

A free bet is a bet credit given by an operator. You can use it to place a bet, but you can't withdraw it. It comes down to three words: stake not returned.

On a normal bet, a win pays back your stake plus your profit. On a free bet, the operator only credits the net profit, because the stake was never yours.

The maths is the same as on a first bet, with one difference: the "stake returned" line drops out of the return.

Free bet, bonus funds, money-back offer, cashback, boosted odds: what's the difference?

These five mechanisms sound alike but don't give you the same thing. Two questions sort them out. Is the stake returned? Is what you receive money you can withdraw?

A money-back offer isn't a free bet, then. The first bet is placed with your money, and a free bet only follows if it loses.

Where do free bets come from?

Free bets are handed out at specific points in a bettor's journey, and always to prompt an action. There are five broad families:

• the first-bet refund, paid as a free bet if that first bet loses;
• the no-deposit free bet, credited on sign-up, usually for a small amount;
• referral, paid when a customer gets someone else to sign up;
• loyalty, given to active customers based on how much they bet;
• missions or challenges, paid after a required series of bets.

Each one rewards an action that suits the operator: opening an account, depositing, betting, coming back.

What terms come with a free bet?

A free bet always comes with terms, and those terms set what it's really worth. The most common:

• minimum odds, below which the free bet can't be used;
• a validity period, often short, after which it expires;
• single use or split use, depending on the offer;
• no cash out, which is almost always the case on a bet placed with a free bet;
• excluded markets or bet types;
• wagering requirements on bonus funds: the bonus has to be bet a set number of times before it becomes withdrawable.

They all point the same way. They cut the value of the free bet or ask you to bet more to recover it. The offer's terms and conditions are what count.

What is a free bet worth?

The expected value of a free bet is the possible net profit multiplied by the estimated probability of winning, with the stake not returned. With a book percentage of 106% (a 6% overround), for a £10 free bet it works out as:

expected value = 10 × (odds − 1) ÷ (odds × 1.06)

The no-vig estimated probability starts from the implied probability of the odds, with the bookmaker margin removed. The principle is the one behind no-vig odds, and the expected value follows the logic on the expected value page.

The row to look at is 5.00: £7.55 of expected value, yet the free bet still loses roughly four times out of five. Three caveats help with reading the table:

• The higher the odds, the more likely you are to get nothing. At 10.00, the free bet loses nine times out of ten. The expected value is an average over many bets, not what any one free bet returns (see variance).
• The real margin is often higher on long odds. Operators load outsiders more heavily than favourites, which pulls down the values at the bottom of the table.
• The table recommends no odds. It shows why the face value of a free bet is misleading, nothing more.

A 2026 paper by the economist Karl Whelan (University College Dublin) models this calculation for a free bet with the stake not returned. It reaches the same conclusion: the expected value rises as the probability of winning falls, at the cost of higher risk.

Work out the value of a free bet with your own figures →

Why do bookmakers offer free bets?

A free bet is an acquisition cost: the operator offers it because it expects you to deposit and then bet more. It's one of the expenses its margin has to cover, as explained on the page on how bookmakers make money.

France gives a sense of scale, because its regulator publishes the figure. In its review of the operators' 2026 promotional strategies, published on 9 January 2026, the ANJ reports that the financial incentives planned by operators (free bets, bonuses, refunds) reach 466 million euros, up 23%, or 60% of their promotional budget. That 60% is the figure I'd point to: it turns a free bet into a budget line rather than a gift.

That isn't generosity. It's a marketing budget line, like advertising. The operators most focused on the mass market are also the ones that hand out the most, as the page on sharp and soft bookmakers shows.

What does the law say in Great Britain?

In Great Britain, free bets and other bonuses are legal, but since 19 January 2026 the Gambling Commission has capped wagering requirements at 10 times and banned incentives that mix product types. Both rules sit in social responsibility code 5.1.1 of the Licence Conditions and Codes of Practice (LCCP), which every licensed operator must follow.

In practice:

• a cap of 10 times on wagering requirements: a licensee may not attach wagering requirements of more than 10 times to an incentive;
• one product type per incentive: a single offer may not combine betting with casino, bingo or lottery products. The Commission gives "Bet £5 and get 20 free spins" as an example of a non-compliant offer;
• the customer's free choice: an offer stays acceptable if the customer freely chooses which product category it applies to.

These rules follow the Commission's response to its autumn 2023 consultation, published on 26 March 2025. They cover Great Britain only, and Northern Ireland has its own legislation.

Last verified at source: 11 October 2026.

Rules vary widely from one country to the next: a full ban in Belgium, a cap of €100 of bonus per bet in Italy, prior authorisation in Switzerland. Each country page, such as the one on bookmakers licensed in Great Britain, has a section on bonuses and free bets.

What are the risks?

The main risk of a free bet is what it pushes you to do before and after. To get one, you often have to sign up, deposit or bet. To get the profit out, you sometimes have to bet again.

The word "free" also plays on a well-known bias. People take more risks with money they don't see as their own, and that habit easily carries over to the real money that follows. In a betting budget, a free bet never counts as income.

Are you betting to win back losses? Depositing more than planned to unlock an offer? Have the offers you receive become the reason you bet? Those are warning signs, described on the page on the risks of sports betting.

What this page doesn't cover

This page explains a mechanism, it doesn't compare offers. It names no operator, no current offer and no promo code. It teaches no method for turning a free bet into withdrawable money by betting with several operators. Those practices are still betting, with their own risks, and operators' terms and conditions often restrict them. Short definitions of these terms are in the glossary.

Put it into practice

Apply this guide to real odds.

Dig into the market

Odds movements are only part of the story. Here are the next topics to read.

Frequently asked questions

Sources & methodology