Casino House Edge Explained

The term “casino house edge” is well-known to experienced gamblers but can be confusing for newcomers. Essentially, the house edge is the casino’s advantage over the player in any game, shown as a percentage representing the casino’s expected profit from each bet over time. But why is it important to understand the house edge?

What Is The House Edge, And How Is It Calculated?


House edge Formula

The house edge is a critical factor in casino games, representing the casino’s statistical advantage over players. It ensures that they will make a profit over time.

To calculate the house edge, compare the true odds of winning to the odds the casino pays when you win. The formula is:

  • House Edge = (True Odds − Casino Odds / True Odds) × 100%

For example, in European Roulette, there are 37 numbers you can place a bet on. The true odds of betting on a single number are 1 in 37, but the casino pays 36 to 1. The house edge calculation is:

  • House Edge = (37 − 36 / 37) × 100% ≈ 2.70%

This percentage explained above shows the casino’s average profit from each bet. Understanding the house edge helps players make informed choices and play strategically, while casinos use it to ensure profitability.

Understanding The Importance of Casino House Edge

Understanding the house edge in casino games helps you make smarter decisions. It shows the odds of winning, guiding you to choose games with better chances of success.

The house edge is in place for casino profitability. Knowing about it, helps you manage risks and enjoy your time more. Whether you are new to gambling or experienced, understanding the house edge is essential for responsible and strategic play.

Why Casinos Have A House Edge

From A Business Perspective

Casinos are businesses aiming to generate profit. Choosing casino games by house edge ensures they make money over time, similar to how a retail store marks up prices to earn a profit.

In casino games, the rules are designed to give the house a slight mathematical advantage, guaranteeing long-term profitability despite players’ skill levels.

The Effect on A Player’s Chances of Winning

For players, the casino house edge indicates the average percentage of their bet they can expect to lose over time. For example, in a game with a 5% house edge, betting $100 means an expected average loss of $5. This doesn’t mean losing $5 every time, but over many bets, the average loss will be around 5%. Short-term outcomes can vary, but over the long run, the house edge ensures the casino profits.

Casino Games By House Edge: Lowest to Highest

Not all casino games are equal in terms of house edge. Knowing which games offer better odds can help players make informed choices.  You can pick the right casino games by house edge.

House Edge In Baccarat Games

Baccarat is a classic casino game with relatively good odds for players. The casino house edge in online Baccarat varies based on the bet type:

  • Banker Bet: Approximately 1.06%
  • Player Bet: Approximately 1.24%
  • Tie Bet: Ranging between 8-14%, depending on specific game rules

Betting on the Banker or Player offers much better odds than betting on a Tie.

House Edge In Blackjack Games

When played with optimal strategy, online Blackjack is one of the best casino games with the lowest house edge to play.

With optimal strategy, the house edge can be as low as 0.5%. This assumes perfect use of basic strategy. Rule variations, number of decks, and game conditions can affect this percentage.

Comparing House Edge In Various Casino Games

If you want to have a better idea of how the house edge affects your favourite games, check out the below table:


The casino house edge ranges from ~1.36% (Don’t Pass/Don’t Come bet) to over 10% for certain proposition bets.


The house edge varies from 2% to 15%, depending on the machine, payout structure, and your chosen house edge casino site.


The house edge in European Roulette (with one zero) is 2.7%. In American Roulette, which includes both a single and double zero, the house edge jumps to 5.26%.

Video Poker

With optimal play, some variants have a house edge below 1%. This can increase if you deviate from the optimal strategy or play versions with less favourable pay tables.

Strategies to Lower The House Edge

Every player aims to improve their chances of winning at a casino. While the house always has an advantage, you can adopt strategies to minimise the edge and improve your odds.

Choosing Casino Games With Low House Edge

Choose Games Wisely

Not all games have the same house edge. Opt for games with a lower house edge to improve your chances.

Research Before Playing

Learn about the different games and their house edges. Aim for games with a house edge of 2% or lower.

Avoid High House Edge Games

Games like American Roulette and certain slot machines may look appealing, but their higher house edge can quickly deplete your bankroll.

Check Game Rules

Even within the same game type, rules can vary. For example, blackjack games that pay 6:5 on a natural have a higher house edge than those that pay 3:2.

By selecting the right games and understanding their rules, you can reduce the house edge and improve your overall casino experience.

Optimal Play Techniques

Even after choosing a game with a low house edge, how you play can greatly affect your odds.

Learn Basic Strategy

In games such as Blackjack, use basic strategy charts to guide your decisions and reduce the house edge.

Avoid Side Bets

Many games have side bets that promise large payouts. For example, while Baccarat has a low house edge, the ‘tie’ bet has a much higher edge

Practice Makes Perfect

Practice in low-stakes games or free-play modes available at many online casinos. This helps you learn the rules and solidify your strategy.

Stay Informed

Keep updated on new game variants and rule changes that could have a direct effect on the house edge.


Which Factors Affect House Edge Variability?

The main rules of popular casino games are usually the same, but small rule changes between casinos can affect the house edge. Both online and physical casinos might tweak rules or offer different game versions to attract players, but these changes can shift the odds. Knowing these details can help you choose games with the best odds.

Rule Variations

In the game of Blackjack, the number of decks, payouts for a natural Blackjack, and rules for splitting or doubling can impact the house edge.

Promotions and Bonuses

Promotions or bonuses, like cashback offers, can reduce the house edge for a limited time or on specific games.

Side Bets

While the main game may have a consistent house edge, side bets can vary between casinos and often have higher edges.

Software Providers

Different online casino software providers may implement slight rule variations in classic games, affecting the house edge.

Local Regulations

Local gambling regulations can enforce specific game rules, resulting in variations of the house edge from one place to another.

Identifying Factors That Affect Casino House Edge

Read the Game Rules

Review the specific rules of a game at a particular casino, even if you are familiar with the game, as there might be variations.

Check for Certifications

Look for certifications from reputable industry testing agencies that audit games for fairness and report on the house edge.

Use Comparison Websites

Visit websites and forums where enthusiasts and experts discuss house edges at different casinos and games.

Ask the Dealer or Support

In brick-and-mortar casinos, ask the dealer about specific game rules. In online casinos, use customer support or live chat to clarify game variants and their house edges.

Casino Games With Lowest House Edge Offering Players Advantages

If you are looking for games with a lower house edge, there are some tips and tricks we can impart:

  • Blackjack with Card Counting: Skilled players using card counting and perfect basic strategy can gain a slight edge. Casinos combat this with tactics like using multiple decks or frequent shuffling.

  • Certain Video Poker Machines: Some video poker machines can offer a great payout percentage when played with a perfect strategy. These machines are rare and they do require a deep understanding of the game.

  • Betting Exchanges: In betting exchanges, players bet against each other, sometimes creating scenarios where both outcomes can result in a profit due to fluctuating odds.

  • Promotional Offers and Bonuses:  Specific bonuses or promotions can give players a temporary edge. It’s crucial to read the terms and conditions as wagering requirements can offset these advantages.

While the notion of a game with no house edge is mostly a myth, certain strategies and scenarios can significantly reduce the edge or even give a slight advantage to the player. Knowledge and strategy are key to boosting your chances in casino gaming.

Impact of House Edge on Player’s Bankroll And Experience

The excitement of casino games comes from their unpredictability, but the house edge is a constant that affects players’ finances and enjoyment. Understanding this concept is essential for all gamblers.

Effects of the Casino House Edge Over Time:

Statistical Reality

The house edge is a mathematical fact. While short-term results vary, over time, it guarantees the casino’s advantage.

Diminishing Bankroll

The casino house edge will gradually reduce a player’s bankroll. For example, in a game with a 5% house edge, a player starting with $100 will typically have $95 left after wagering $100.

Impact on Game Duration

A higher house edge shortens gaming sessions as the player’s bankroll depletes faster. Games with a lower house edge offer longer playtime and more enjoyment, even without big wins.

Perceived Value

The house edge can influence how players perceive a game. Games with a high house edge might feel less enjoyable or “unfair” to players.

Strategies to Improve Your Odds

The allure of beating the house and coming out on top has driven countless players to develop and employ various strategies.

Techniques And Methods

  • Card Counting in Blackjack: This famous strategy involves tracking the ratio of high to low-value cards in the deck. When the count is favourable, players increase their bets to gain a slight edge.

  • Basic Strategy in Blackjack: Making optimal decisions based on the dealer’s up card can minimise the house edge, giving players better chances of winning.

  • Banker Bet in Baccarat: Betting consistently on the banker in Baccarat offers one of the lowest house edges, according to the game’s rules.

  • European over American Roulette: Choosing European Roulette with one zero over American Roulette with two zeros reduces the house edge, improving your odds.

  • Optimal Betting in Craps: Placing bets with the lowest house edge, like the Pass Line and Don’t Pass Line bets, gives players better chances in craps.

  • Using Casino Bonuses: Online casinos often offer bonuses that can temporarily improve your odds, especially if the wagering requirements are favourable.

  • Betting Systems: Strategies like the Martingale or Paroli systems adjust bets based on previous outcomes, influencing short-term betting decisions, although they can’t change the inherent house edge.


  • Bankroll Management: Before starting a gaming session, decide on an amount you’re willing to spend. This ensures you don’t chase losses and helps you play within your means.

Legality And Ethics In Casinos

  • Casino Policies: While card counting in Blackjack is legal, casinos often disapprove of it. Players caught counting cards may be asked to leave or even banned from the casino.

  • Edge Sorting: This technique exploits subtle differences in playing cards’ backs, but it’s considered cheating in court cases and frowned upon by casinos.

  • Using Software or Devices: In online casinos, using software to gain an advantage or predict outcomes is cheating and illegal in many places.

  • Team Play: Organising a team for strategies like card counting can be effective but is discouraged by casinos.

  • Ethical Considerations: Even if a method is legal, players should consider the ethical implications. Fair play is crucial for an enjoyable gaming experience.

In conclusion, while there are strategies to reduce the house edge temporarily, casinos remain profitable businesses.

House Edge Glossary

House Edge
The advantage that a casino has over a player. Normally, this will range between 0.05% and 5%, depending on the game.
The chances or probability of winning a prize on a particular scratchcard game.
Return to Player percentage, indicating the average amount of money returned to players over time.
Complimentary points earned by players as they place wagers. These are normally 0.025 to 0.3% of all wagers placed during a certain time.
The level of risk associated with a slot game, determining the frequency and size of wins.
The cash a machine rewards a player for a certain win.
Card counting
A strategy used in card games, such as blackjack, to track the ratio of high to low-value cards to gain an advantage.
A tie between the player and the dealer, resulting in the original bet being returned.
Zero House Edge
A situation (mostly theoretical) where the casino has no advantage, and the player's odds of winning are entirely fair.
Blackjack Basic Strategy
A set of optimal decisions in blackjack that minimises the house edge.
Betting Systems
Strategies players use to adjust their bets, aiming to beat the house edge. Examples include the Martingale and Paroli systems.
The statistical measure of how much individual game outcomes deviate from the average or expected outcome.
A statistical measure of the chance that an event will occur.
Payback Percentage
The amount of money the game returns to players over time. It's the flip side of the house edge; for example, a game with a 5% house edge has a 95% payback percentage.
Another term for a bet.

House Edge FAQS

Matilda May avatar
Matilda May

Hi there! I’m Matilda, the heart and soul behind the editor’s desk at CasinoAus. For over ten years, I’ve journeyed through the vibrant casino industry world, from managing gaming floors in Victoria to spearheading responsible gambling initiatives. My experience has given me a deep understanding of what makes this industry tick. Plus, my background in Business Administration, with a focus on Hospitality Management, means I’m well-versed in the nitty-gritty of gambling regulations and market trends.

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