Value Betting
Definition
A betting approach based on finding and backing outcomes where your estimated probability of the event occurring is higher than the probability implied by the bookmaker's odds. If you consistently bet with positive expected value, you will profit over a large enough sample regardless of short-term variance.
Example
You estimate Bayer Leverkusen wins a match with 55% probability. The bookmaker prices them at 2.10 (implied probability: 47.6%). The expected value is: (0.55 × 2.10) − 1 = +0.155, or +15.5% EV.
This means for every £100 wagered on this bet type over many repetitions, you expect to make £15.50 in profit on average — the definition of a value bet.
How CalibrSports Predicts This
Every bet CalibrSports publishes is a value bet — the model must identify a positive edge over the bookmaker's implied probability before a bet is flagged. We apply minimum edge thresholds that vary by market and league to ensure the edge is large enough to overcome bookmaker margin and model uncertainty.
Key Facts
Core formula
EV = (p × odds) − 1
Positive EV threshold
Edge > 0%
Minimum edge applied
3–8% depending on market
Long-run requirement
100+ bets to confirm edge
Related Terms
Frequently Asked Questions
Can value bets lose?
Absolutely. Any individual value bet can lose. Value betting is a probabilistic strategy — over a large sample the edge manifests, but individual bets are still subject to variance. A single-day loss is not evidence the approach is flawed.
How is value betting different from handicapping?
Handicapping is the process of evaluating teams to estimate probabilities. Value betting is the process of comparing those probabilities to bookmaker odds. You need both — good handicapping (accurate probabilities) is the input; value betting is the output.
Why do bookmakers limit value bettors?
Bookmakers make money from recreational bettors who bet on preferences, not edge. Consistent value bettors shrink their margin over time. Bookmakers protect profitability by limiting stake sizes on accounts that show positive expected value betting patterns.