A value bet occurs when a bookmaker offers odds that are higher than the true probability of the outcome. If you consistently find bets where the odds imply a lower probability than reality, you'll be profitable over time.
A bet has positive expected value (+EV) when:
Your estimated win probability × Decimal odds > 1
Example:
This means for every $100 you bet, you expect to earn $112.50 back over time.
| Aspect | Value Betting | Arbitrage |
|---|---|---|
| Risk | Variable — you can lose individual bets | Near-zero — profit guaranteed |
| Edge | Larger per bet | Smaller per bet |
| Sustainability | Long-term profitable | Requires constant monitoring |
| Capital | Need one bookmaker | Need multiple bookmakers |
| Detection | Less likely to be limited | More likely to be flagged |
Value betting is the long game. You won't win every bet, but with a genuine edge, you'll profit over hundreds of bets.
1. Track closing lines: The closing line at sharp books (Pinnacle) is the strongest predictor of true probability.
2. Use odds comparison: If most books have odds of 2.00 but one offers 2.20, the latter is likely a value bet.
3. Statistical models: Build your own probability estimates from historical data.
4. News and information: Know about injuries, weather, and motivation before the books adjust.
Our value bets page already calculates the overvalue percentage for you:
Overvalue = (Your probability / Implied probability - 1) × 100%
An overvalue above 2-3% is generally considered worth pursuing.
Use the Kelly Criterion calculator to size your bets optimally. Most professionals recommend half-Kelly (50% of the full Kelly suggestion) to reduce variance.