Bonus Bets Explained: How They Work and What They Are Worth
How bonus bets work, what they are actually worth, and how to convert them into withdrawable cash.
By
Eric Pauly
9 min read
What Is a Bonus Bet?
A bonus bet is a promotional credit a sportsbook hands you to place a wager without staking your own cash. If the bet wins, you collect the profit only. The credit itself, often called a bet credit or a free bet, is consumed whether the bet wins or loses and never lands back in your balance. That is the detail most people skip when they ask what is a bonus bet, and it quietly changes how you should use one. Bonus bets are the most widely used promotion at legal U.S. sportsbooks, showing up as sign-up offers, loss-back credits, parlay insurance, and odds boosts.
The gap between the number printed on a bonus bet and the cash you can actually withdraw is the whole point. A $100 bonus bet is not worth $100. Played well it is worth somewhere around 65 to 80 cents on the dollar, and dropped on the wrong line it can shrink closer to 30. This guide covers how bonus bets work, why the stake rule caps their value, what a bonus bet is really worth at different odds, and how to turn one into withdrawable cash using higher-odds selections and, when it makes sense, a hedge.
article Summary
A bonus bet lets you wager without risking cash, but you keep only the profit because the stake is never returned. That makes a $100 bonus bet worth roughly 65 to 80 percent of face value, and the exact figure depends on the odds you place it at. Bet the credit on plus-money selections, watch the expiry window, and hedge the other side at a second book when you want to lock in guaranteed cash.
Why a Bonus Bet Works Differently From Cash
The Stake Never Comes Back
With a normal cash bet, a win returns your stake plus the profit. Put $100 on a +150 line and it hits, and your balance grows by $250, which is your $100 back plus $150 in winnings. A bonus bet strips out the first part. Place a $100 bonus bet on that same +150 line and a win pays you the $150 profit only. The $100 credit disappears either way. So a cash bet and a bonus bet at identical odds pay out very differently, and that is exactly why you cannot treat the two the same way. Because you effectively surrender the stake portion on every bonus bet, longer odds recover more of the credit, and that single fact decides almost every smart bonus bet decision.
Example
A $100 cash bet at +150 that wins returns $250, your $100 stake plus $150 profit. A $100 bonus bet at the same +150 line returns $150, because the credit is used up and only the profit is paid. Same odds, same result on the field, $100 less in your account with the bonus bet.
Bonus Bet, Free Bet, Bet Credit, Same Mechanics
Sportsbooks use several names for the same thing. FanDuel leans on bonus bets, DraftKings and BetMGM say bet credits, and older marketing still calls them free bets. In practice they behave identically: you keep the winnings, not the stake. The one real variation worth knowing is the retired risk-free bet, which refunded your actual cash if the first wager lost. Regulators pushed books away from that language, so today a bet advertised as free almost always means a stake-not-returned credit. If plus-money and minus-money prices are still fuzzy, our breakdown of the line in sports betting shows how each translates into implied probability, which is the math driving everything below.
What a Bonus Bet Is Actually Worth
Why Face Value Overstates It
Since the stake is gone the moment you place the credit, the true value of a bonus bet equals the profit you expect to keep, not the number printed on the offer. A quick way to size it up: the fraction of face value you hold is roughly one minus one divided by the decimal odds. At even money that is 50 percent. At +300 it climbs to 75 percent. That is why the commonly cited range for a well-used bonus bet sits around 65 to 80 percent of face value, and why dumping a credit on a heavy favorite is the fastest way to throw value away.
Expected Value by Odds
Here is how a $100 bonus bet grades out at different prices, measured by how much of the credit you expect to convert if you simply place it and let it ride:
At -200 (about 67 percent implied), a win pays $50 profit, holding roughly 33 percent of face value.
At +150 (about 40 percent implied), a win pays $150 profit, holding about 60 percent of face value.
At +300 (about 25 percent implied), a win pays $300 profit, holding about 75 percent.
At +500 (about 17 percent implied), a win pays $500 profit, holding about 83 percent.
The pattern is consistent: the longer the odds, the more of the credit you keep on average. A practical sweet spot for most bettors is the +250 to +450 band, long enough to recover strong value without needing a giant hedge on the other side. When I run bonus offers through positive EV betting tools, the screen flags which plus-money lines carry the most value against the no-vig price, so the credit lands on a number the market is mispricing rather than a random long shot.
How Sportsbooks Hand Out Bonus Bets
Where the Credits Come From
The biggest bonus bets arrive with new-account sign-up offers, frequently in the $150 to $1,000 range after a qualifying deposit or first wager. Past the welcome offer, books keep the credits flowing through a handful of recurring promotions:
Loss-back credits that refund a losing first bet as a bonus, common on FanDuel and BetMGM welcome deals.
Parlay insurance that returns a credit when a single leg of a multi-leg parlay misses.
Odds boosts that pay the boosted amount as a bonus rather than as cash.
Refer-a-friend rewards that drop a credit when someone signs up through your link.
These recurring drops are smaller, often $5 to $50, but they stack up across a season if you actually claim them. One pattern I see repeatedly across sportsbook promotions is that the headline dollar figure and the cash you can genuinely extract rarely line up, because the terms quietly shape what the credit is worth.
Rollover, Minimum Odds, and Expiry
Read the terms before you place anything. The restrictions that trip people up most are minimum odds requirements, usually around -200 or longer, which block you from parking the credit on a safe favorite. Expiration windows are the other silent killer, commonly 7 to 14 days, and no book reminds you the day before a credit vanishes. Some offers also carry a playthrough or rollover requirement, meaning you have to wager the bonus a set number of times before any winnings become withdrawable. My process on any new bonus bet is to check the minimum odds and the expiry first, then find the longest plus-money line I am comfortable with before the clock runs out. A credit you forget about is worth zero, so a reminder on your phone protects more value than most strategy tweaks.
Turning a Bonus Bet Into Withdrawable Cash
The Hedge, Step by Step
Placing a bonus bet on a plus-money line already recovers most of its value on average, but a single bet still either wins or loses. If you want a guaranteed cash figure instead of a coin flip, you hedge: put the bonus credit on one side at long odds, then back the other side with real cash at a second sportsbook. Because the two outcomes cover each other, you lock in a similar payout no matter who wins. This is the same principle behind risk-free bets through arbitrage, applied to a promotional credit rather than a market price gap.
Example (hypothetical)
Say you hold a $100 bonus bet and put it on the Indiana Pacers at +300 at one sportsbook, then hedge the New York Knicks with about $221 of real cash at -280 at a second book. If the Pacers win, the bonus bet profits $300 and the hedge loses $221, leaving roughly $79. If the Knicks win, the hedge profits about $79 and the spent bonus bet costs you nothing. Either result nets close to $79 in withdrawable cash, a conversion near 79 percent of the credit. This is an illustration, not a claimed result.
Let Software Do the Line Hunting
Finding the plus-money side and its matching hedge across two books by hand is the tedious part, and software collapses it. ProfitDuel is built specifically around converting promos and bonus bets into locked profit through matched betting. It runs the math, flags which offers are live in your state, and walks you through the qualifying bet and the cover side so the result lands close to fixed no matter what happens on the field. When I work through a stack of bonus offers with it, the profit tracker also surfaces which promotions I have not cashed yet, which is exactly where most bettors leave money sitting. You can try ProfitDuel on a 3-day free trial, and our full ProfitDuel review covers who it fits and where it falls short. If you would rather size a hedge yourself, a hedge calculator handles the stake math in seconds, and for broader plus-money screening, OddsShopper flags which long-odds lines carry the most value against the no-vig price.
When to Skip the Hedge
Hedging is not always the right call. It guarantees a smaller, certain number, and the cash side still pays some vig, so if you are comfortable with variance you often keep more expected value by placing the bonus bet straight on a strong plus-money line and letting it run. The hedge earns its keep when the credit is large, when you want cash locked before an expiry deadline, or when you are clearing many offers and prefer steady conversions over swings. It also depends on having real money spread across books, another reason bettors keep several accounts funded rather than leaning on one app.
Final Thoughts
A bonus bet is real value, but only if you respect the one rule that defines it: the stake never comes back. That pushes every smart decision toward plus-money odds, where you recover the largest share of the credit, and away from safe favorites that hand most of it back to the book. Treat a $100 bonus bet as roughly $65 to $80 in expected cash and play it accordingly.
Read the minimum odds and expiry terms first, place the credit on a plus-money line your bankroll can support, and hedge at a second book when you want a locked figure instead of a swing. Do that across sign-up offers and ongoing promotions and the credits turn into a steady stream of withdrawable cash rather than long-shot lottery tickets. If you want help spotting which lines convert best, start with the best sports betting tools we rate.
Bonus Bets FAQ
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