1 
Boomerang
Cashback and turbo bets on a fast, modern book
4.9 / 5
Offer: 100% up to 200 units
- ›35+ sports
- ›Fast payouts
- ›Cashback
- ›Turbo bets
Free Bets Explained: What the Best and Biggest Betting Offers Are Really Worth
The number on the banner is almost never the number you can withdraw. Here is how free bets actually work, how to judge a free bet on its real value, and a calculator that shows your real winnings in seconds.
Free bets are the most common promotion in online betting, and the most misunderstood. The confusion comes down to one rule, “stake not returned”, which quietly halves the value of most offers. Get that rule straight and you can tell a genuinely good deal from a loud one.
How free bets actually pay out
With a “stake not returned” free bet, the standard type, you keep only the winnings and not the token. A €20 free bet at decimal odds of 3.00 returns €40 (the €60 total minus the €20 token that the book keeps). Because the token itself never comes back, the biggest offers in the market are worth far less than their headline. Put any offer into the calculator below to see the true figure before you opt in.
Soccer odds converter & free-bet calculator
Type any odds format — see decimal, fractional, American and the implied chance instantly.
- Decimal
- 2.50
- Fractional
- 3/2
- American
- +150
- Implied chance
- 40.0%
Most free bets are “stake not returned” — you keep the winnings, not the token.
If it wins, you keep
30.00
A 20 free bet at 2.50 returns 30.00 in winnings.
How to compare the best free bets
Ignore the headline amount first and read the fine print. The best free bets share three traits: a low minimum-odds requirement (so you aren't forced onto long shots), little or no wagering requirement on the winnings, and a comfortable expiry window. A €10 token with no wagering usually beats a €50 token you must turn over five times at short odds — the calculator makes that comparison concrete.
Best and biggest free bets betting sites
Among the international books we track, the operators below run the most usable welcome offers — judged on the real terms, not the biggest free bets betting headline. Check the current terms on each book's own site, since promotions change week to week.
2 
Rabona
Gamification and player-card rewards across sports and casino
4.8 / 5
Offer: 100% up to 200 units
- ›35+ sports
- ›Player-card system
- ›Casino + sportsbook
- ›Live betting
3 
Winrolla
A clean, uncomplicated newcomer with strong live markets
4.7 / 5
Offer: 100% up to 200 units
- ›30+ sports
- ›Modern platform
- ›Live betting
- ›Mobile browser + app
4 
20bet
A very wide book spanning 40+ sports
4.6 / 5
Offer: 100% up to 100 units
- ›40+ sports
- ›Deep market coverage
- ›Live betting
- ›Casino included
18+ (or the legal age in your jurisdiction). Gambling involves financial risk and can be addictive — only stake what you can afford to lose. Odds, bonuses and availability change often; confirm the current terms on the operator's own site. For confidential help visit BeGambleAware.org or GamCare.
Frequently asked questions
What are free bets?
Free bets are promotional tokens a bookmaker credits to your account, usually after a qualifying deposit or first bet. You stake the token on a market; if it wins you keep the winnings, but with the common “stake not returned” type you do not get the token amount back on top.
How much are the biggest free bets betting offers really worth?
Less than the banner suggests. A €50 “stake not returned” free bet at odds of 2.00 returns €50 in winnings, not €100. The biggest free bets betting sites advertise are also the ones with the toughest wagering terms, so always run the number through the calculator on this page first.
How do I find the best free bets?
Compare three things, not just the headline figure: the minimum odds you must bet at, the wagering requirement, and the expiry window. The best free bets have low minimum odds, low or no wagering, and a generous time limit.
Do free bets work on soccer?
Yes — soccer is the most common market for free bets. See the bet365 soccer odds guide for how the biggest book prices the games you'd typically use a token on.