Are Odds Boosts Ever Worth It?
Your book paints a price gold and calls it a gift. Sometimes it is. Usually the gold paint is the only free part. Here are the three shapes every boost takes, with the math that tells them apart in ten seconds.
Shape 1: the real boost
A +240/−310 market boosted to +300. Worst-case devig says fair is +280, so the boost pays +5.2% EV with a quarter-Kelly stake of 0.43u. This clears the vig and then some. Fire.
Shape 2: the marketing boost
A +160/−190 market "boosted" to +175. Sounds generous. Devig it: fair is +176, EV is −0.4%. The boost didn't even cover the juice. You'd be paying the book a smaller tax and calling it a win. Pass, and notice how good the banner looked anyway.
Shape 3: the monster
A 50% profit boost on a −110 coin flip. Unboosted, that bet is −4.5% EV (the tax, working as intended). Boosted, your effective price is +136 on a true 50/50: +18.2% EV. Profit boosts applied to near-even markets are quietly the best deals in any sportsbook app, precisely because the unboosted bet is so ordinary.
The rule
A boost is worth exactly fair probability × payout − 1, nothing more. So: devig the real market first, then hold the verdict to a floor: +3% on mainlines, +5% on props, +10% while you're learning. Below the floor there's another boost tomorrow. The actualodds calculator does the whole check, including the boost math, in one paste.
Devig a 50% profit boost live →
Got a free bet instead of a boost? Convert it properly.