USA
Canada
Australia
UKHouse Edge in Casino Games: What It Is & Why It Matters
Every year, casinos generate billions of dollars in revenue, largely due to the house edge, the built-in mathematical advantage that ensures casinos profit over time. Understanding the house edge can transform your gaming experience and how you manage your bankroll.
We’ll walk you through the basics, how the house edge varies across games, and practical tips for how you can use this knowledge to your advantage. By the end, you’ll have the tools and know-how to make smarter gaming choices.
What is House Edge?
The house edge is the average percentage of each bet that the casino expects to keep as profit over the long term. That average percentage will change across each game, with some games expected to be more profitable than others.
For players, the house edge helps explain which games offer better odds and how quickly losses may accumulate over extended play.
How is House Edge Calculated?
In simple terms, house edge is calculated by comparing how much a game pays back to players on average versus how much is wagered.
- House Edge = (Casino’s average profit ÷ Player’s wager) × 100
This number shows the casino’s built-in advantage, which is expressed as a percentage and based on long-term averages rather than short-term results.
For example, if a game has a house edge of 5%, the casino expects to retain $5 for every $100 wagered by players over the long term. House edge doesn’t affect the outcomes of individual wagers, but rather the outcome of many wagers placed over a long period of time.
Is House Edge & RTP the Same Thing?
No, house edge and RTP are not the same, but they are closely connected and represent opposite sides of the same calculation. House edge shows how much the casino keeps, while RTP indicates an average of how much players can expect to receive back on a long-term basis.
- If a game has a 96% RTP, players can expect to receive $96 back for every $100 wagered over the long run.
- The remaining 4% is the house edge, which represents the casino’s expected profit on those wagers.
House Edge vs. Hold Percentage
Both house edge and hold percentage describe how casinos make money, yet they measure two very different things. They are often used interchangeably, but they’re not the same thing.
- House edge is a theoretical number. It represents the casino’s built-in advantage on a game, based on long-term mathematical averages. This is the figure most players see when comparing casino games.
- Hold percentage is what actually happens in practice. It measures how much money the casino keeps from real player wagers over a specific period of time.
For example, a game may have a 5% house edge casino on paper, but the casino’s hold percentage could be higher or lower depending on factors like how players bet, how long they play, and how much they’re paid out from winning.
Understanding this difference helps explain why casino profits can vary day to day, even though the house edge on casino games never changes.
How House Edge Works in Practice
In real gameplay, the casino house edge shows up through the total amount you wager over a session, not any single spin or hand. Each bet carries the same built-in percentage, so as you continue playing, the combined wagers gradually expose more of your bankroll to that advantage.
This is why faster games, larger bet sizes, and longer sessions typically lead to higher overall losses, even when wins happen along the way. Understanding how this plays out in practice makes it easier to compare casino games by house edge and manage how much you risk during a session.
House Edge in Different Casino Games
House edge varies across different casino games found on our informative list of online casinos to visit. This section explores the differences in table games, slot machines, and the impact of online versus physical casinos.
Table Games
Table games offer various house edges, often influenced by player strategy and specific game rules. Here are some popular examples:
- Blackjack: With optimal play, the house edge can be as low as 0.5%. Without strategy, it can rise to around 2%. The exact edge depends on the specific rules and number of decks used.
- Roulette: American roulette has a house edge of 5.26%, while European roulette offers a lower edge of 2.7%. The substantial difference is because European roulette has one “0” compared to American roulette’s two “0 & 00”.
- Craps: The house edge varies by bet type. The pass line bet has a house edge of about 1.41%, while some proposition bets can have edges as high as 16.67%.
- Baccarat: Betting on the banker yields a house edge of approximately 1.06%, making it one of the most favorable bets for players.
| Game | Standard House Edge | House Edge with Optimal Play | Key Strategy Tips |
|---|---|---|---|
| Blackjack | ~2% | ~0.5% | Use basic strategy charts |
| Roulette | 5.26% (American) | 2.7% (European) | Choose European wheels |
| Craps | 1.41% (Pass Line) | N/A | Stick to pass and come bets |
| Baccarat | 1.06% (Banker) | N/A | Bet on banker consistently |
Slot Machines
Slot machines usually carry a higher house edge than table games, with percentages ranging from 1% to 15% depending on the specific title and its payout structure. This means that for every $100 wagered, the expected return to the player may be as low as $85–$99 over the long run. By contrast, games like keno can climb to 25%, making them some of the least favorable options in the casino.
Unlike table games where rules are fixed, slot payouts are programmed by the casino (or regulated minimums), so the return to player (RTP) is entirely determined by game design.
Progressive jackpot slots deserve special mention: because part of each bet funds the growing jackpot, the base game’s payouts are reduced, leading to a higher house edge. While the chance at a massive win is appealing, these machines are best approached as entertainment value rather than consistent profit opportunities.
Keno (20-35% House Edge)
Keno is one of the least favorable casino games in terms of odds. House edges typically range from 20% to 35%, depending on the paytable and the number of picks. Players choose numbers (often 1–20), and a random draw determines the winners. The appeal comes from the potentially large payouts, but the chances of hitting enough numbers are slim.
Plinko (2-10% House Edge)
Plinko, adapted from the famous TV game, has grown in popularity in online casinos. Players drop a ball or puck down a pegged board, where it bounces randomly before landing in a prize slot at the bottom. The house edge varies widely depending on the layout and payout distribution but often sits between 2% and 10%.
Scratch-Offs (20-30% House Edge)
Scratch-off or “instant win” tickets are the simplest specialty game. You just reveal symbols or numbers to see if you win. The house edge (or payout percentage) depends entirely on the ticket design and can be as high as 20–30%. Since outcomes are predetermined, no strategy can change the odds.
| Game | Typical House Edge | Best Suited For |
|---|---|---|
| Keno | 20% – 35% | Players who enjoy lottery-style play and big jackpots |
| Plinko | 2% – 10% | Casual players looking for fast, fun, visual gameplay |
| Scratch-Offs | 20% – 30% | Players who want instant results and simple mechanics |
How to Use House Edge Knowledge to Your Advantage
Understanding the casino house edge helps players choose games with better long-term value and avoid options where the odds are stacked against them. It can also guide smarter betting decisions, such as selecting particular wagers within a game that carry lower house advantages than others.
By focusing on casino games with lowest house edge and managing bet size, players can potentially stretch their bankroll and get more play time from their money.
Choosing the Right Games
Selecting games with a lower house edge can improve your chances of getting more value from every wager. Even small differences in percentage can translate into longer play sessions and/or better opportunities for meaningful payouts.
Consider these criteria when comparing casino games by house edge:
- Game Type: Play games like blackjack or baccarat, which are known for having some of the lowest house edges available. Blackjack, for example, often has low house edges ranging from 0.5% to 1.5%.
- Rules and Variations: Choose versions with player-friendly rules, such as European roulette rather than American roulette, since European roulette has half the house edge that American roulette does.
- Skill Level: Focus on games where player decisions impact outcomes, as opposed to completely random outcomes. In blackjack, using proper casino strategy can reduce the house edge even further, whereas in slots the play has no control over how each game plays out.
- Payout Rates: Look for games with higher return to player (RTP) percentages, as these typically appear among casino games with the lowest house edge.
- Bankroll Management: Set clear limits before you start playing to help control spending and extend your overall playtime. It’s a good idea to limit your per-wager bets to 1%–5% of your session’s gambling budget.
Tip: Always manage your bankroll wisely by setting a budget and sticking to it.
Calculating Your Expected Loss
House edge can be used to estimate how much you might expect to lose over time, based on how much you wager. To get a rough idea of your expected loss, multiply your total wagers by the house edge on casino games you’re playing. For example, if you wager $500 on a game with a 2% house edge, your expected loss is about $10 over the long run.
This isn’t a guaranteed outcome for any single session. Instead, it’s a long-term average that helps explain why choosing casino games with the lowest house edge can make a noticeable difference in losses over time.
Impact of Bet Size, Game Speed, & Play Duration
How much you wager and how quickly you play has a major impact on how the house edge casino affects your results. Three key factors influence your overall exposure to the house edge:
- Bet size: Larger wagers increase the amount of money exposed to the house edge each round.
- Game speed: Faster games create more betting opportunities in a shorter period.
- Play duration: The longer you play, the more total wagers you make.
Even games with a low house edge can become expensive with large bets and long sessions. Managing your bet size and pacing can help reduce total expected losses while still providing an enjoyable gambling experience.
Alternative Metrics: Element of Risk & Standard Deviation
While house edge is the most commonly referenced number, it’s not the only metric that matters. Two games can have the same casino house edge but feel completely different to play. That’s where element of risk and volatility come into play.
Element of Risk vs. House Edge
The element of risk looks at how much a game can swing during play. While house edge tells you the casino’s long-term advantage, element of risk focuses on how much a player might win or lose in a given session.
A game with a low house edge can still be risky if:
- Payouts are infrequent but large
- Long losing streaks are possible
- Big wins are rare but dramatic
In contrast, some games with a slightly higher house edge on casino games offer steadier results, making bankroll swings feel more manageable. The experience feels smoother, with fewer extreme highs and lows.
House edge explains the math. Element of risk explains the experience.
Understanding Volatility & Standard Deviation
Volatility and standard deviation are closely related terms that describe how spread out a game’s results can be. They help explain how often a game pays out and how large those wins or losses tend to be. Higher values mean bigger swings, while lower values point to steadier play.
- Bigger potential payouts
- Longer dry spells between wins
- More dramatic bankroll swings
- Smaller, more frequent wins
- Slower bankroll movement
- A more predictable playing experience
Standard deviation is the statistical way of measuring this volatility. The higher the standard deviation, the more extreme the highs and lows can be—even when the house edge casino stays the same.
This is why two casino games with low house edge can feel completely different once real money is on the line.
Common Misconceptions about House Edge
The casino house edge is often misunderstood, especially by newer players who focus on short-term results. Even the best online casinos maintain some form of house edge on most of their games. While the math behind house edge is straightforward, how it plays out during real gameplay can feel very different.
Clearing up a few common misconceptions can help you better understand what the house edge on casino games actually means and how it impacts your results.
Short-Term Wins vs. Long-Term Expectation
Even though winning streaks happen all the time, even on games with a high house edge, a lucky casino or a big one-time payout doesn’t change the long-term return probability built into each game.
The house edge is based on averages across millions of wagers. In the short term, results are unpredictable and players can certainly come out ahead. But in the long term, the house almost always gets how much money it expects to have returned to it.
This is why a game may appear hot or cold during a session, even though the house edge casino advantage remains unchanged.
Entertainment Value vs. Expected Loss
Many players assume that games with a higher house edge should always be avoided, but in reality, some of these games offer entertainment value that goes beyond pure odds. This includes games that are fun to play but have a higher expected loss.
Slot machines, for example, often have higher house edges but provide engaging visuals, exciting bonus features, and the chance at large payouts. Lower-edge games like blackjack may offer better long-term value, but they may not appeal to every player’s style, like casual players for instance.
Understanding the trade-off between entertainment and expected loss allows you to choose casino games by house edge that match your goals, whether that’s maximizing playtime, chasing bigger wins, or just having a good time no matter what the house edge is.
When House Edge May Not Apply (Lotteries, Draw Games)
In some cases, the concept of house edge is less relevant or calculated differently altogether. For example, lotteries and certain draw-based games operate on fixed prize pools rather than traditional payout tables.
Since their results depend heavily on random draws and large prize structures, the expected return for these games is often expressed as an overall payout percentage instead of the standard house edge found on casino games.
These types of games typically have much higher built-in advantages for those offering the games.
Casino House Edge FAQ
The average casino house edge varies widely depending on the game, but most casino games fall between about 1% and 10%. The exact percentage depends on the rules, payouts, and how each game is played.
House edge and casino hold are related, but they measure two different things. The house edge is the theoretical advantage built into a game and represents the percentage the casino expects to keep over the long run. Casino “hold” reflects what actually happens during real play, measuring how much money the casino keeps from total wagers over a specific period of time.
Some casino games with the lowest house edge include blackjack, baccarat, and certain video poker variations. These games offer better long-term value because the casino’s advantage is relatively small.
The smartest casino bets are usually those tied to games with a low house edge, such as the banker bet in baccarat or basic strategy blackjack wagers. These options reduce how much the casino expects to keep over time. Pairing low-edge bets with controlled bet sizes and smart bankroll management helps extend playtime and reduce expected losses.
Winning in Spite of the House Edge
The house edge gives casinos a long-term advantage, but players can still come out ahead during individual sessions. By understanding how house edge is calculated and looking for lower edge games, you can manage risk and improve your chances of finishing a session with a profit.
80% 
80% This score goes to the highest rated sites by experts. Only sites that hold an expert rating of above 85% are given this status.
A green Jackpot Certified score is awarded when at least 60% of expert reviews are positive.
A red Bust score is displayed when less than 60% of expert reviews are positive.
A grayed-out gem means there are not enough expert ratings to produce a score. The gambling site could be new.
A green Jackpot Certified score means that at least 60% of player reviews are positive.
A red Bust score means that less that 59% or less of player reviews are positive.
A grayed-out face means there are not enough player reviews to produce a score.