Every sportsbook app has a "boosts" tab full of offers like "Was +350, now +450". Some are excellent value. Many are still bad bets, just less bad than before. Here is how to tell which is which in about 30 seconds.
Odds boosts vs profit boosts
- An odds boost is a specific bet the book has pre-selected and repriced (e.g., a same-game parlay boosted from +350 to +450).
- A profit boost is a token you apply to a bet of your choice to increase its winnings by a percentage. (Profit boosts.)
Profit boosts are usually easier to make +EV, because you choose a fairly priced market. Odds boosts depend entirely on how the book priced the original bet.
The 30-second test
- Find the fair probability of the boosted bet. For a straight bet, devig a sharp line. (No-vig odds.)
- Convert the boosted odds to decimal.
- EV = fair probability × boosted decimal − 1.
Example: "Player to score 25+ points, was +120, now +160."
- Sharp market on that line implies a fair 40%.
- Boosted decimal 2.60 → 0.40 × 2.60 − 1 = +4%. Worth it.
Another: "Three-leg SGP, was +600, now +750."
- If the true chance of all three is 9% (fair +1011), then 0.09 × 8.50 − 1 = −23.5%. Still a bad bet, despite the boost.
The odds boost calculator does this math.
Patterns worth knowing
- Straight-bet boosts on main markets are frequently +EV, because the boost is larger than the normal margin.
- Single-player prop boosts can be good if there is a sharp line to compare against.
- Same-game parlay boosts often remain −EV, because SGP margins are huge and correlation pricing is opaque. (SGP correlation.)
- "Both teams to score 30+" style specials are hard to price and usually carry big margins.
The max-bet problem
Boosts often cap stakes at $10–50. Even a great boost is worth only a few dollars in expectation. They add up over many weeks, but do not let a small boost tempt you into larger, unboosted bets.
Hedging a boost
A +EV straight-bet boost can be hedged at another book for a small locked-in profit, just like a profit boost. (Hedging sportsbook promos.)
Frequently asked questions
Are odds boosts a good bet?
Some are. Straight-bet boosts on popular markets are often +EV; boosted same-game parlays often are not.
How do I know if an odds boost is +EV?
Compare the boosted price with the fair probability from a devigged sharp line: if fair probability × boosted decimal odds is above 1, it is +EV.
Why do sportsbooks offer odds boosts?
To attract bets and engagement. They budget for some boosts being +EV for customers as a marketing cost.