Casino house edge explained

Game comparison & recommendations

This casino advantage is the product of the games themselves and not set by individual casinos. So no matter where you choose to invest your dollar, if you're betting on casino games, the fact is you can't escape the house edge.

You'll notice that in some cases the house edge is variable. This isn't down to the casino, but certain conditions within the game itself.

Ever wondered why online and offline casinos have so many slots games? It's because slots offer players a relatively low RTP, so this is where the casino stands to make more profit - or in other words its biggest house edge.

In slots players win coins by matching reels across a winning payline. And while today's modern video slots, that offer anything between 20-100 paylines, seem great because they offer more chances for players to win. The fact is the more paylines a game has, the bigger the impact on house edge.

Let's take the example of a machine with 20 paylines. Play all 20 each time and your chances of landing a win are maximized. But, play just 10 paylines, and you've effectively just cut your odds by half. And by increasing your chances of losing you're incrementally increasing the casino's chances of winning.

Online slots paytables will provide you with all the information you need on paylines and payouts.

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If you're dead set on playing casino slots, here are a couple of tips to keep in mind:

Progressive jackpot slots

Progressive jackpot slots play out just like a regular slot game for the most part. The key difference is that, as well as the regular small wins you can make by matching symbols across the reels, you're also competing against a network of other players to land a huge jackpot payout.

At the top progressive games online this can be upwards of millions of dollars, so we're talking truly life-changing sums. Just be careful as, to qualify, some progressives require players to play the max bet across the max number of paylines each spin.

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Again, with progressive jackpot slots it pays to seek out the titles with the best RTP, which in 2023 include: Mega Fortune by NetEnt (96.6%), Gold Rally by Playtech (97.01%), and Hall of Gods by NetEnt (95.5%).

Whether the jackpot is local to the casino, or across a network, can also affect a progressive slot game's RTP. In the case of Arabian Nights by NetEnt, the RTP is 95.60% if local, versus 95.2% if shared. It's also worth avoiding progressive slots if you don't intend to play for the jackpot, as this can bring the RTP down dramatically - 90.6% in Arabian Night's case.

Standard house edge

Blackjack is a game that relies (in part) on a player's knowledge of what it takes to win, as much as the luck of the cards drawn. For that reason, the 0.5% house edge is considered a general indication - based on playing blackjack perfectly using the standard rules and basic strategy.

If you have no clue about blackjack whatsoever, then it would be fair to say that the house edge would increase a little. As your inexperience is more likely to lead you to poor decisions that see you go bust or lose.

Using strategy

Like poker, blackjack is a game where knowledge and judgment yield power. To that end, several strategies have surfaced which promise players a way to protect their bankroll and minimize the house's edge.

Card counting

Card counting in blackjack involves assigning a numerical value to each card in the deck and keeping a running count of the cards as they're dealt. The most common card counting strategy is the hi-lo system, whereby 2-6 cards are given a value of +1, 7-9 cards count as 0 and 10, Ace and faces are -1. If the running count goes up than players know they're at an advantage, but when it's down the advantage is in the casino's favor.

American roulette

In American roulette the wheel has 38 pockets, including a 0 and 00 pocket. The below table shows the house edge, and the payout, on all possible bets players can place on an American roulette table.

Calculating the house edge

If you want to work out how the house gets its edge you only need look at true odds of an outcome occurring versus what the house will pay out for it.

Let's take the example of correcting predicting a single number bet:

• An American roulette has 38 pockets in total: pockets 1-36 + 0 + 00 =38.
• So the true odds of guessing one single number correctly are 38:1 but the house only pays out odds of 35:1.
• So on a $1 bet the player wins back $36. $2 less than the true odds would pay back.
• That $2 represents the house edge. Which in this case would be calculated as: 2 x (1/38) = 0.0526 - or 5.26%.

You can use this basic principle to work out the house edge on all bets in American roulette.

The difference comes with the first five-number bet (only possible on the American wheel). This bet incidentally is known in gambling circles as the "sucker" bet because the house odds jump up to 7.89%. So it's never recommended to take this bet.

European roulette

European roulette follows the same principles of American roulette but with one key exception - the wheel has no 00 pocket. The absence of this one pocket might not seem significant, but it has a huge affect on the edge that the house has over players.

To illustrate, let's take a look at the house edge offered on different bets in European Roulette:

As you can see, the same bets in European roulette only have a 2.7% house edge. Meaning, if you play the European way, you'll actually make more money back over time, compared to playing American roulette.

If we look at the house edge as a percentage shaved off of every dollar invested into a casino then in European roulette for every dollar you spend you're losing 0.027 cents versus American roulette where you're down 0.0526 cents on every dollar.

This decrease of almost half in the house edge rests entirely on the absence of the American 00 pocket from the European wheel. By taking away this pocket the true odd possibilities reduce to 37:1 for single number bets, which in European roulette still pay out 35:1. This reduces the difference between the true odds and casino odds to just 1 unit. So, using our house edge math we can calculate the edge as 1 x (1/37) = 0.027 or 2.7%.

French roulette

French roulette by comparison is very similar to its European cousin. The wheel follows suit with 1-36 red and black pockets, and just one 0 pocket, but there are two rules within the game that reduce the house edge even further.

In French roulette, the house edge is reduced to just 1.35% for all bets that payout even money. Making French roulette the best one for players to seek out online and at land based casinos.

The reason the edge is so low on even money bets in French roulette boils down to two things:

It's the inclusion of these two unique rules, and the absence of a 00 pocket on the roulette wheel, that makes it the most attractive roulette style for those gamblers looking to beat the house at their own game.

Playing perfect strategy

Just like with regular poker, knowledge of poker play can help you make better calls and judgments in video poker games - improving your player edge over the house. Played perfectly, here are the expected returns you stand to yield on the main video poker variations:

As you can see, played well Video Poker offers players the chance to net some high returns, and in some cases the perfect strategy will even see you snatch the advantage over the house.

As you can see, played well, video poker offers players the chance to net some high returns, and in some cases the perfect strategy will even see you snatch the advantage over the house.

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Perfect strategy will help you win at Video Poker, but you can also maximize the amount you take home by sticking to these simple rules:

Video poker can be one of the most profitable games at a casino, if you know how to play and you seek out the machines offering the best RTP.

As the statistics demonstrate, the tie bet is consistently the one where the house has a huge advantage over the player regardless of the number of decks in play. Whereas the bet with the lowest house edge is banker to win.

Side Bets

One of the ways casinos have sought to make baccarat more interesting is by offering the option of side bets on hands. Which can be made instead of, or on top of, standard baccarat bets. These include:

Reducing house edge

In baccarat you're essentially betting blind on whose hand you think will add up to a total closest to nine. So whether you win or lose depends on the luck of the draw. But, there are a couple of things you can do to help your chances and minimize too many hits to your bankroll.

One other thing to note about baccarat is that players typically pay a commission on banker bets that come good, but this is because the odds are stacked in the player's favor. So even factoring this in, backing the banker to win is still the most advisable course of action for any baccarat bettor.

Bets & their house edge

The house edge in craps varies considerably, from nothing at all, to a whopping 13.9% and how much you'll forfeit to the house over time all boils down to the bets you place.

Here's a look at the most popular Craps bets and their respective HE.

While the odds bets at 0% HE obviously seem the most attractive, they can only be made following a Pass/Don't Pass or Come/Don't Come bet. So the actual edge is influenced by the odds offered on these combined bets.

Multi-roll bets

In craps betting takes place across a process that begins with a come out roll and evolves from there. Some craps games might take place over several rolls, while others can be quickly stitched up after just one.

Multi-roll bets are craps bets that can't be settled on just one roll only. These bets include:

With multi-roll bets it's worth bearing in mind that while the lure of higher payouts might make the bet seem more attractive on the surface. In reality the house edge is an indication you'll make less money on these bets over time. Than you would do those that payout even money with a lower house edge.

Gambling responsibly in America (whether online or offline) isn't just a case of abiding by local laws - although making sure you stay within the remit of the law in your state is a top priority.

Responsible gambling is also about making sure that you manage your bankroll carefully, never betting beyond your financial means. In addition to keeping a clear head when you gamble, and showing respect for your fellow players and casino personnel.

No one should have to feel intimidated while doing their job, or while indulging in a pastime they enjoy. So please, be sensible, respectful and responsible while taking part in casino gaming for real money. Read our guide to problem gambling for more information.

Even the most levelheaded of gamblers isn't immune from gambler's fallacy. Try as you may to keep logic and reason front of mind, when you're on a hot streak, it can be easy to get caught up in the moment. Thinking that luck is on your side and losing is somehow out of the question.

That way of thinking is the definition of gambler's fallacy. It's the belief that higher forces are at work, and that winning, or losing, is down to something other than skill or randomness. The fact is casino odds are what they are. No amount of lucky rabbit's feet will swing them in your favor.

So be wary of thinking you can't lose. In gambling, there always has to be winners and losers. No one is immune. No matter how 'lucky' they might seem. Never forget, that so-called luck can change at any given second.

Like this guide? We've got plenty more expertise and advice where this came from. Take a look at some of our other online gambling resources below. Or, try out some of our free casino games to get a sense of different casino game odds.