Bonus Bet (Free Bet)

A bonus bet, also widely called a free bet, is a promo offer where the sportsbook fronts the stake for a wager at no cost to you. Win the bonus bet and you collect the profit — the payout minus the stake — but the original stake itself doesn’t come back. That “stake not included” structure is the defining trait that sets bonus bets apart from normal wagers, and it shapes exactly how much they’re really worth.

Bonus bets are one of the most common promo tools books use to pull in new customers and keep existing ones around. They show up in sign-up packages, deposit matches, and ongoing loyalty rewards. Because the stake isn’t returned on a winner, a bonus bet’s true value sits below its face amount. A $100 bonus bet isn’t worth $100 — its expected value rides on the odds you place it at, and you can squeeze more out of it by aiming bonus bets at longer odds.

Example

A sportsbook hands a bettor a $50 bonus bet as part of a welcome offer. The bettor puts it on a selection at American odds of +200. If it wins, the profit is figured on the $50 stake, returning $100 in profit. But unlike a regular $50 bet at +200, the bettor doesn’t get the $50 stake back — only the $100 profit lands in the account. If the bet loses, the bettor is out nothing of their own, since the book supplied the stake. To wring the most from this bonus bet, the bettor went with longer odds, which lifts the potential profit relative to the non-refundable stake.

Key Points

• Stake not returned: The defining feature of a bonus bet is that the original stake isn’t part of the payout on a winner. Only the profit portion hits your account.
• Best used at longer odds: Since the stake is forfeited either way, placing bonus bets at higher odds maximizes your return relative to the bet’s real value.
• Common promotional tool: Bonus bets run through sign-up bonuses, referral rewards, and ongoing promos. They’re among the most frequent incentives legal sportsbooks offer.
• Subject to restrictions: Most bonus bets carry conditions — expiration dates, minimum odds, and limits on eligible markets. Always read the terms before placing one.
• Calculable value: A bonus bet’s expected value can be estimated mathematically from the odds you choose, which helps you decide how to deploy these promos.