RTP vs House Edge — What's the Difference? (Simple Explanation)

The Simple Answer

RTP and house edge are two ways of expressing the same mathematical relationship. They always add up to 100%. If a game has a 96% RTP, it has a 4% house edge. If a game has a 2.7% house edge, it has a 97.3% RTP.

RTP (Return to Player) tells you what percentage of wagered money the game returns to players over time. It is the player perspective: "how much do I get back?"

House edge tells you what percentage of wagered money the casino keeps over time. It is the casino perspective: "how much do we profit?"

They are two sides of the same coin. A game with 96% RTP returns out of every wagered and keeps . The is the RTP. The is the house edge. Together, they account for the entire .

This relationship is universal and applies to every casino game — slots, blackjack, roulette, baccarat, craps, video poker, live game shows, and every other game of chance. The specific percentages differ between games, but the fundamental equation is always the same: RTP + House Edge = 100%.

RTP Explained with Examples

RTP stands for Return to Player. It is expressed as a percentage and represents the proportion of all wagered money that a game is designed to return to players over its lifetime. The key phrase is "over its lifetime" — RTP is a long-term statistical average calculated over millions of game rounds.

EXAMPLE 1: A slot machine with 96% RTP. If one million players each wager for a total of ,000,000 in bets, the slot returns approximately ,000 in winnings and keeps ,000. Each individual player might win /bin/zsh, , , or ,000 — but across all players and all bets, approximately 96% of the total wagered amount flows back to players.

EXAMPLE 2: European roulette with 97.3% RTP. The single green zero gives the house its edge. For every wagered across all bets on the table, approximately .30 is paid out in winnings. The remaining .70 is the casino profit.

EXAMPLE 3: Blackjack with 99.5% RTP (assuming perfect basic strategy). For every wagered, the game returns approximately .50. This makes blackjack one of the highest-RTP games in the casino — but only if the player uses perfect basic strategy. Poor strategy decisions lower the effective RTP significantly.

RTP tells you the COST OF PLAYING. A 96% RTP slot costs you approximately for every you wager. Over a session where you wager , your expected cost is . This does not mean you will lose exactly — your actual result might be a win or a loss — but is the mathematical expectation.

Higher RTP = lower cost = better for the player. When choosing between two similar games, always prefer the one with higher RTP because your expected cost per dollar wagered is lower.

House Edge Explained with Examples

House edge is the casino mathematical advantage over the player, expressed as a percentage of each wager. It represents the long-term profit the casino expects to make from a game. Like RTP, house edge is a statistical average over millions of game rounds.

EXAMPLE 1: European roulette has a 2.7% house edge. There are 37 numbers (0-36), but winning bets pay as if there were only 36 (35:1 for a straight-up bet). That single green zero creates a 1/37 = 2.7% advantage for the house. For every wagered on roulette, the casino expects to keep .70.

EXAMPLE 2: American roulette has a 5.26% house edge. The addition of the double zero (00) means there are 38 numbers but winning bets still pay at 35:1. This doubles the house advantage compared to European roulette. For every wagered, the casino expects to keep .26. This is why we always recommend European roulette over American roulette — the game looks almost identical but costs nearly twice as much to play.

EXAMPLE 3: A slot with 4% house edge (96% RTP). For every wagered, the casino expects to keep . Over a session of 500 spins at each ( total wagered), the expected casino profit is .

The house edge is how casinos stay in business. Every game is designed so that the casino has a mathematical advantage. This advantage is not manipulation or cheating — it is a transparent mathematical property of the game rules. The casino does not need to cheat because the mathematics guarantee long-term profitability.

House edge varies dramatically between games. Some games have a house edge below 1% (blackjack with perfect strategy, certain video poker variants, baccarat banker bet). Others have a house edge above 10% (keno, some lottery-style games, certain side bets). The table in the next section provides a comprehensive comparison.

Why Two Numbers for the Same Thing?

If RTP and house edge are just two expressions of the same concept, why do both terms exist? The answer is historical convention and audience.

RTP is PLAYER-FOCUSED LANGUAGE. It was developed by slot machine manufacturers and regulators to communicate game fairness to players in a positive frame. Telling a player "this game returns 96% of your money" sounds better than "this game takes 4% of your money." RTP became the standard metric in the slots industry, where game info screens display it prominently. When players search for game information, they typically search for RTP.

House edge is INDUSTRY AND MATH-FOCUSED LANGUAGE. Originating from the table games world and casino management, house edge describes the same concept from the business perspective. Casino executives, game designers, and gambling mathematicians typically discuss games in terms of house edge. Academic papers and gambling mathematics textbooks use house edge. When comparing table games, house edge is the conventional metric.

The result is that SLOTS primarily use RTP while TABLE GAMES primarily use house edge — even though they describe the same mathematical relationship. A slot info screen will say "RTP: 96%" while a blackjack strategy guide will say "house edge: 0.5%." Both are telling you the same type of information from different angles.

Understanding both terms allows you to compare games across categories. When someone tells you blackjack has a 0.5% house edge and a slot has 96% RTP, you can instantly recognise that blackjack (99.5% RTP) is a better mathematical proposition than the slot (96% RTP). Without fluency in both terms, this comparison is less intuitive.

A simple conversion reference: RTP = 100% - House Edge. House Edge = 100% - RTP. That is the complete formula. There is nothing more complex about the relationship.

How They Apply to Different Games

Every casino game has a defined house edge and RTP. Here is a comprehensive comparison across all major game types, ranked from lowest house edge (best for players) to highest house edge (worst for players).

BLACKJACK (PERFECT BASIC STRATEGY): House edge 0.5%, RTP 99.5%. The lowest house edge in the casino, but ONLY with perfect basic strategy. Poor strategy decisions can increase the house edge to 2-4%. Card counting can theoretically push the edge to the player side.

VIDEO POKER (JACKS OR BETTER, FULL PAY): House edge 0.46%, RTP 99.54%. One of the best odds in the casino, but requires perfect strategy play on a full-pay machine. Lower-pay tables have significantly worse odds.

BACCARAT (BANKER BET): House edge 1.06%, RTP 98.94%. The banker bet in baccarat offers excellent odds with no strategy required — simply bet on the banker every hand. The player bet has a 1.24% house edge (98.76% RTP). The tie bet has a horrendous 14.4% house edge (85.6% RTP) — never bet on ties.

CRAPS (PASS/DON'T PASS): House edge 1.41%, RTP 98.59%. The pass line bet in craps is one of the best bets in the casino. Combined with maximum odds bets (which have zero house edge), the effective house edge drops even further.

EUROPEAN ROULETTE: House edge 2.7%, RTP 97.3%. The single-zero version of roulette. All bets (except the rarely offered en prison rule) have the same 2.7% house edge regardless of whether you bet red/black, individual numbers, or sections.

AMERICAN ROULETTE: House edge 5.26%, RTP 94.74%. The double-zero version. Nearly twice the house edge of European roulette for an almost identical game. Always choose European roulette when both are available.

ONLINE SLOTS (HIGH-RTP): House edge 2-4%, RTP 96-98%. The best online slots offer competitive odds, though they vary significantly between games and providers.

ONLINE SLOTS (AVERAGE): House edge 4-6%, RTP 94-96%. The majority of online slots fall in this range. Still reasonable entertainment value.

ONLINE SLOTS (LOW-RTP): House edge 6-10%+, RTP 90-94%. Avoid these slots when better options are available. Some progressive jackpot slots fall in this range because the base game RTP is reduced to fund the jackpot pool.

KENO: House edge 25-40%, RTP 60-75%. One of the worst odds in the casino. The house edge is enormous compared to virtually every other game.

The takeaway: if you care about maximising your odds, blackjack with perfect strategy, video poker, baccarat banker bets, and high-RTP slots offer the best mathematical value. Games like keno and lottery-style games should be treated purely as entertainment with extremely high costs.

Why Short-Term Results Do Not Match

This is the most important concept that most players misunderstand. RTP and house edge are long-term averages. They describe what happens over millions of game rounds. Your individual session — whether it is 100 spins, 500 hands, or an evening at the casino — is a tiny sample that can deviate wildly from the theoretical average.

Variance (also called volatility in the slots world) is the mathematical term for this deviation. High-variance games produce results that are far from the average in the short term. Low-variance games produce results closer to the average.

CONCRETE EXAMPLE: You play a 96% RTP slot for 200 spins at per spin ( total wagered). The expected return is , meaning an expected loss of . But here are some actual outcomes that are all completely normal for a 200-spin session: You lose your entire (0% actual return). You break even ( returned, 100% actual return). You win ( total returned, 250% actual return). You hit a bonus and win ,000 (1,100% actual return).

All of these outcomes are within normal statistical bounds for a 200-spin session. The 96% RTP does not mean you will end up near — it means that if you combined your 200 spins with the 200 spins of millions of other players, the total aggregate return would approach 96%.

STANDARD DEVIATION quantifies this variance. For slots, the standard deviation per spin is typically 3-10x the bet size (depending on volatility). Over 200 spins at , the standard deviation of your total result is approximately -. This means your result could easily be - above or below the expected value — a range of to for an expected value of .

The LAW OF LARGE NUMBERS guarantees that as the number of game rounds increases, the actual return approaches the theoretical RTP. But "large numbers" means hundreds of thousands or millions of rounds — far more than any individual player will ever complete on a single game. For practical purposes, your personal results will always be dominated by variance rather than RTP.

This is why BOTH RTP and volatility matter when choosing a game. RTP determines your long-term cost. Volatility determines your short-term experience. A 96% RTP, high-volatility slot will cost you the same as a 96% RTP, low-volatility slot over a million spins — but your individual sessions will feel completely different.

How to Use This Knowledge

Understanding RTP and house edge empowers you to make informed decisions about which games to play and how to manage your expectations. Here are the practical applications.

ALWAYS COMPARE BEFORE YOU PLAY. When choosing between games, compare their RTP (or house edge). If two slots look equally fun but one has 97% RTP and the other has 94% RTP, the 97% slot costs you 3% less per dollar wagered. Over a session where you wager , that is the difference between a expected loss and a expected loss. Over a year of regular play, this adds up substantially.

CALCULATE YOUR EXPECTED SESSION COST. Multiply your total expected wagering by the house edge. If you plan to play for 2 hours at a slot doing 500 spins per hour, your total wagering is ,000. At 96% RTP (4% house edge), your expected cost is . This is the price of 2 hours of entertainment. Compare this to other entertainment options to decide if it represents good value for you.

CHOOSE GAMES THAT MATCH YOUR GOALS. If you want the lowest possible cost and the longest sessions, play blackjack with basic strategy (0.5% house edge) or low-volatility high-RTP slots. If you want a shot at a big win and accept higher cost, play high-volatility slots with good RTP. If you want pure entertainment with no strategy, roulette offers simple gameplay with a moderate house edge (2.7% on European).

UNDERSTAND THAT LOWER HOUSE EDGE DOES NOT MEAN YOU WILL WIN. A 99.5% RTP blackjack game can still result in a losing session — and it frequently does. Lower house edge means you lose LESS on average, not that you win. The house edge is the price of playing, and even a tiny price compounds over many hands. The only game with 100% RTP (zero house edge) is not playing at all.

USE RTP TO EVALUATE BONUSES. A casino bonus with 30x wagering requirements on a 96% RTP slot means you need to wager 30 times the bonus on a game that costs 4% per dollar wagered. Expected cost: 30 x bonus x 0.04 = 1.2x the bonus amount. This means you expect to lose more than the bonus is worth — the bonus has negative expected value. The same bonus on a 99% RTP game: 30 x bonus x 0.01 = 0.3x the bonus amount — much better. This is why playing high-RTP games during bonus wagering is crucial.

Common Misunderstandings

MISUNDERSTANDING 1: "96% RTP means I get back from every I deposit." This is wrong. RTP applies to total wagered money, not deposited money. If you deposit and make 500 spins at each, you have wagered (because you re-bet winnings). Your expected return is x 0.96 = , meaning an expected loss of from your deposit. Your actual result could be anywhere from /bin/zsh to thousands depending on variance.

MISUNDERSTANDING 2: "Higher RTP means I will win." RTP tells you the rate of loss, not that you will win. A 99.5% RTP game still has a house edge — you are still expected to lose over time. Higher RTP means you lose more slowly and your bankroll lasts longer, but it does not guarantee positive results in any given session.

MISUNDERSTANDING 3: "The house edge means the casino cheats." The house edge is not cheating — it is the published, transparent mathematical structure of the game. Every casino game openly declares its rules, and those rules produce a mathematical advantage for the house. This is no different from a movie theatre charging for a bag of popcorn — it is the business model, not deception.

MISUNDERSTANDING 4: "If I have lost , the RTP means I am due to win it back." This is the gambler fallacy. RTP does not guarantee that your personal results will match the long-term average over any specific timeframe. Each spin or hand is independent. Past losses do not create "credit" that will be returned in future play.

MISUNDERSTANDING 5: "RTP is calculated per session." RTP is calculated over the entire lifetime of the game across ALL players. It is not a per-session, per-player, or per-hour metric. Your individual session might return 0% or 500% — both are normal deviations from the long-term 96% average.

MISUNDERSTANDING 6: "A 2% house edge means I lose 2% of my bankroll per session." The house edge applies to each individual wager, not to your bankroll. If you bet for 500 spins on a 2% house edge game, you have wagered and expect to lose — regardless of whether your starting bankroll was or ,000. The total amount wagered (not deposited) is what matters.

MISUNDERSTANDING 7: "Slots have worse odds than table games." This is a generalisation that is often but not always true. High-RTP slots (97-99%) have better odds than American roulette (94.74%) and many table game side bets. The key is comparing specific games, not broad categories.

Frequently Asked Questions