Sure Bet
Definition
Sure bet is another term for arbitrage — a combination of bets across different bookmakers that guarantees a profit regardless of the outcome. The term emphasizes the risk-free nature of the strategy, though in practice factors like bet limits, voided bets, and account restrictions introduce operational risk.
Example
You find a tennis match where Player A is 2.10 at Book 1 and Player B is 2.10 at Book 2. Total implied probability = 95.2%. By staking $100 on each, you pay $200 total and are guaranteed a return of $210 — a $10 risk-free profit.
Related Terms
Arbitrage (Sure Bet)
StrategyArbitrage betting (arbing) involves placing bets on all possible outcomes of an event across different bookmakers at odds that guarantee a profit regardless of the result. It exploits price discrepancies between books and is considered risk-free in theory.
Middles
StrategyA middle is a situation where you can bet both sides of a point spread or total at different bookmakers with overlapping ranges, creating a scenario where both bets can win. The downside is limited (you lose the vig on one side) while the upside can be substantial.
Value Bet
StrategyA value bet occurs when the odds offered by a bookmaker are higher than the true probability of the outcome. Consistently finding and placing value bets is the foundation of profitable sports betting. The edge may be small per bet but compounds over a large sample.
Edge
StrategyEdge is the percentage advantage a bettor has over the bookmaker on a given wager. It is calculated as the difference between the true probability of an outcome and the implied probability from the odds. A positive edge means the bet has positive expected value.
Track your Sure Bet with OddsLab
OddsLab automatically calculates and tracks key metrics for every bet you place — no spreadsheets required.
Start Free