Promotions are some of the clearest +EV you will ever find in betting — but only if you treat them as a math problem instead of free play. A sportsbook hands you a “$100 bonus bet,” and the instinct is to fire it at your favorite team and hope. Do that and you’ll capture maybe a fraction of its value, randomly. Treat it as a number to be converted into guaranteed cash, and you can lock in most of its face value every single time. This course shows you exactly how to read each promo type and squeeze the real money out of it.
The promo types you’ll meet
Books dress these up with different names, but almost every offer is one of a handful of shapes. Knowing which shape you’re holding tells you how to play it.
- Deposit match — the book matches part of your deposit with site credit, almost always tied to a rollover requirement (more on that below).
- Free / bonus bets — a credit you stake on one bet. The catch: the stake is not returned, only the profit. You’ll see this labeled “SNR” — stake not returned.
- No-sweat / second-chance — you bet your own cash; if that first bet loses, the book refunds it as a bonus bet. It’s a rebate, not a true refund.
- Odds boosts / profit boosts — the book temporarily improves a price or multiplies your profit on a qualifying bet.
- “Risk-free” — marketing language that almost always means a bonus-bet refund if you lose, not your cash back. Read it as a no-sweat bet.
Why a bonus bet is worth less than cash
This is the single most important idea in the course. With a normal cash bet, winning returns your stake plus profit. With a bonus bet, the stake is gone the moment you place it — win and you collect only the profit; the credit itself evaporates whether you win or lose.
That’s why a $100 bonus bet is not worth $100. A well-converted bonus bet is worth roughly 70% of its face value — and as you’ll see, the exact figure depends entirely on the odds you place it at. Your whole job is to push that percentage as high as it will go.
Converting a bonus bet with a hedge
The trick is to stop gambling the bonus and start arbitraging it. Put the bonus bet on a high-odds underdog, then bet the other outcome with your own cash at another book. Whichever side wins, you walk away with the same guaranteed cash. You’re trading a volatile credit for a fixed payout.
The hedge formula (decimal odds)
H = B × (o1 − 1) ÷ o2Where B = bonus amount, o1 = decimal odds of the bonus leg (the longshot), and o2 = decimal odds of the cash hedge on the opposite outcome. H is the cash you stake on the hedge.
The logic: B × (o1 − 1) is the profit if the bonus leg wins (remember, stake not returned). You want your hedge to return exactly that much, and a hedge of H at decimal o2 returns H × o2 — so set H × o2 = B × (o1 − 1) and solve for H.
A full worked conversion
Say the book gives you a $100 bonus bet. You place it on an underdog at decimal 5.00 (that’s +400 in American), and you hedge the opposite side with cash at decimal 1.25 (that’s −400) at a second book.
Worked example
First find the hedge stake:
H = 100 × (5.00 − 1) ÷ 1.25 = 100 × 4 ÷ 1.25 = $320.
Now check both outcomes:
- Bonus leg wins: profit = 100 × (5.00 − 1) = $400. Subtract the $320 you lose on the hedge → +$80.
- Hedge wins: the hedge returns 320 × 1.25 = $400, a $80 profit. The bonus bet simply loses — but you only risked free credit → +$80.
Either way you bank $80 in real cash on a $100 bonus — a ~80% conversion.
Notice the lever: higher odds on the bonus leg mean a better conversion. Because the stake is never returned, a longshot extracts far more value than a favorite. Bonus bets belong on big underdogs, and you hedge the rest.
No-sweat and second-chance offers
These take one extra step. You bet your own cash on the qualifying wager. If it wins, great — you keep the cash profit and there was nothing to convert. If it loses, the book hands you a bonus bet, and you convert that exactly as above. So the real value of a no-sweat bet is the chance it loses multiplied by the conversion rate of the resulting bonus bet.
The arithmetic is identical to the worked example — only the trigger is different. A dedicated converter tool can run all of this instantly: feed it the bonus amount and the two prices, and it returns the exact hedge stake and your locked profit.
Reading the terms before you commit
The headline number is never the whole story. Deposit matches in particular usually carry a rollover (also called playthrough) requirement — you must wager the bonus some multiple of times before it can be withdrawn. A 10× playthrough on a $500 match means $5,000 of action, and every cycle bleeds a little to the vig.
Before you opt in, check the fine print for:
- Maximum bet or maximum bonus stake.
- Eligible markets and minimum odds — many offers exclude heavy favorites, which is exactly where you’d want to hedge from.
- Expiration dates — bonus credits often die in 7 days.
A bonus with heavy playthrough is worth far less than its headline number. Always discount the offer to its real, after-terms value before deciding it’s worth your time.
Common mistakes
- Putting bonus bets on heavy favorites. At low odds the “stake not returned” penalty wrecks your conversion — you might capture 10–20% instead of 70–80%.
- Ignoring playthrough on deposit matches. A 15× rollover can turn a “$1,000 bonus” into a couple hundred dollars of real value.
- Missing the expiration date and letting a credit expire unused — that’s a 100% loss.
- Not hedging at all and just gambling the bonus on a single outcome. You’ll average out worse and ride huge variance getting there.
- Violating max-bet or eligibility terms, which can void the bonus and any winnings entirely.
Key takeaways
- A bonus bet only pays profit, not stake — so it’s worth less than cash, roughly 70% when well converted.
- Convert by placing the bonus on a longshot and hedging the other side with cash: H = B × (o1 − 1) ÷ o2.
- Higher odds on the bonus leg = better conversion; favorites are the worst place to spend free credit.
- Read the terms — playthrough, max bet, eligible odds, and expiration decide an offer’s real value.