House edge
The house edge is the percentage of every wager a game keeps on average over the long run, equal to 100% minus the game's RTP.
A game with 96% RTP has a 4% house edge: across an enormous number of rounds it retains four units per hundred staked. It says nothing about any single session, where variance dominates completely.
Edges vary widely by game. Certified slots usually sit between 2% and 8%, classic table games such as baccarat and blackjack are typically below 2% with correct play, and side bets are often far higher. Sportsbook uses the equivalent concept under the name margin.
- House edge = 100% − RTP
- Applies per wager, so it compounds with turnover
- Realised revenue over a period is measured as GGR
- The sportsbook equivalent is called margin
Frequently asked questions
Is house edge the same as GGR?
No. The house edge is a theoretical percentage per wager; GGR is the actual bets-minus-wins result observed over a period.
Which games have the lowest house edge?
Classic table games like baccarat and correctly played blackjack are typically the lowest, while side bets and some mini games are much higher.