Casino basics • Odds
House Edge vs. RTP: What Do Casino Odds Mean?
A 96% return to player figure and a 4% house edge describe the same long-run average. Here is what those numbers mean for a session, a wager, and your bankroll.
Updated September 28, 2026
Explore game guides
What is the house edge?
The house edge is the casino's expected share of the money wagered over a very large number of comparable plays. A 4% edge means an average expected loss of $4 for every $100 staked, under the stated rules and playing assumptions. It does not mean you lose exactly $4 when you sit down with $100. You could win, lose the whole session budget, or finish close to even.
The key word is wagered. If you reuse the same $20 in five separate $20 bets, you have placed $100 in total wagers even though you did not arrive with $100 in your pocket. A small edge applied repeatedly can add up as play continues.
| Hypothetical game | Long-run return | Long-run house edge | Expected result on $1,000 wagered |
|---|---|---|---|
| Game A | 96% RTP | 4% | $960 returned; $40 expected loss |
| Game B | 98% RTP | 2% | $980 returned; $20 expected loss |
How does return to player fit in?
Return to player, or RTP, is the expected share of total wagers paid back as prizes over a large sample of plays. For the same fixed game and set of rules, a 96% RTP is another way to express a 4% house edge: 100% minus 96% equals 4%. Payouts include winning stakes that are returned, not just profit.
The UK Gambling Commission explains that an advertised RTP is an average over many games, not a target the machine has to hit during your visit. A 96% RTP does not mean a player who wagers $100 today will walk away with $96. It also does not mean a machine that paid less earlier is now due to pay more.
For games with player decisions, different rules and different choices can change the expected return. Compare figures only when the assumptions match.
Does a lower edge mean I will win?
No. A lower edge describes a smaller mathematical disadvantage per dollar wagered in the long run. Short sessions still swing widely. A lower edge does not set the frequency of wins, the largest possible loss, or the amount you should stake.
When you read an odds claim, ask four questions: Which exact game and rule set does it cover? Does it assume a particular strategy? Is the number a long-run average? How much would you wager over the whole session? Those details do more work than a headline percentage.
- House edge describes expected loss as a share of total wagers.
- RTP describes expected prizes as a share of total wagers.
- Neither percentage predicts the result of your next play or a short session.
Compare the rules behind the number
Open a game guide and check its paytable, rules, and worked payouts before playing with practice credits.
Explore game guides