House edge meaning in one line: it is the average percentage of every bet the casino expects to keep over the long run. A 5% edge means that for every $100 you wager, the game is built to keep about $5, whatever happens in any single session.
House edge = 100% minus RTP, so a 97.3% roulette wheel has a 2.7% edge.
Your expected cost = total amount wagered × house edge, not deposit × house edge.
Faster games and bigger bets cost more per hour even at the same edge.
Strategy lowers the edge in blackjack and video poker; betting systems never remove it.
Bonus wagering is played against the house edge, which eats into bonus value.
Definition
Average % of each bet the casino keeps over time
Formula
100% − RTP
Cost formula
Total wagered × house edge
European roulette
2.7% (one zero, 37 pockets)
Can a system remove it?
No
House edge meaning: what the number tells you
The house edge is the casino's mathematical advantage on a game, written as a percentage of the amount bet. It comes from paying winning bets at slightly less than their true odds. Over thousands of bets, that small gap becomes the casino's revenue.
It is the mirror image of RTP (return to player). Add the two together and you always get 100%. Casinos tend to quote RTP for slots and house edge for table games, but you can convert one to the other in your head.
Where the house edge comes from: a roulette example
European roulette has 37 pockets: numbers 1 to 36 plus a single zero. A straight-up bet on one number wins 1 time in 37, so fair odds would be 36 to 1. The game pays 35 to 1.
The same idea applies to every casino game. Slots hide the math inside the reel design and pay table, but the gap between true odds and the payout is always there.
House edge by game: RTG examples compared
The table converts reported RTPs for RealTime Gaming titles into house edge. Figures come from third-party sources, not RTG directly, and table-game and video poker figures assume you play the correct strategy.
Reported RTP and house edge for selected RTG games
Sources disagree on some games. Suit 'Em Up Blackjack is listed at 99.51% by SlotCatalog and 'up to 99.51%' by GamesHub, which suggests the figure depends on the side bet and rules in use. Always check the help screen in the game you open.
Turning house edge into dollars per hour
House edge applies to every dollar you put into action, so speed matters as much as the percentage. Expected cost per hour = bet size × bets per hour × house edge. The pace figures below are illustrative assumptions, not measured speeds.
Illustrative cost per hour at the same $1 bet size
Scenario
Bets per hour (assumed)
House edge
Wagered per hour
Expected cost per hour
Video poker, 99.54%
400
0.46%
$400
$1.84
European roulette
60
2.7%
$60
$1.62
Slot at 96%
500
4%
$500
$20.00
Slot at 96%, autoplay pace
900
4%
$900
$36.00
A low edge on a fast game can cost more per hour than a higher edge on a slow game. If you want your budget to last, lower bet size and slower play matter as much as picking a low-edge game. Our bankroll management guide builds this into a plan.
Can strategy or betting systems beat the house edge?
Correct play can reduce the edge in games where you make decisions. In blackjack, basic strategy cuts the edge to its lowest point; in video poker, holding the right cards matters in the same way. It lowers the cost of play, but the edge stays with the casino.
Betting systems are different. The Martingale doubles your stake after each loss. Starting at $5, seven straight losses means a $640 bet to win back $5, after $635 already lost, and table limits or your balance stop the sequence. Every bet in the chain still carries the same edge, so the system changes the shape of your results, never the average.
Card counting is history and theory online: RNG blackjack reshuffles every hand, so there is nothing to track. Our page on whether you can count cards online explains why.
House edge and bonus wagering
When you take a bonus, you must wager a multiple of it before cashing out, and the edge works on every dollar of that wagering. Expected cost of clearing = wagering required × house edge of the game you play.
Example: a $100 deposit plus $100 bonus at 30x (bonus + deposit) means $6,000 wagered. On a 96% slot the expected cost is $6,000 × 4% = $240, which is more than the $100 bonus. That is why the wagering requirement and game weighting decide whether an offer has any real value, as our bonus value method shows.
Low house edge games at offshore casinos with an offer via our links
Knowing the house edge helps you choose games; it does not change the legal picture. The casinos below are offshore and not licensed or regulated by any US state, so payouts, disputes and terms are up to the casino, with no state-backed protection. Check your state's law and our guide to offshore vs state-licensed casinos.
Royal Ace Casino: $2,500 Welcome Bonus + 35 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). LCB reports 30x (bonus + deposit) on slots and 60x on blackjack and video poker, with a max cashout of 10x the deposit; casino.guru instead lists 250% up to $2,500 + 35 spins. Those are third-party figures, so check the casino's current terms. More in our Royal Ace review.
Slot Madness Casino: $2,500 Welcome Bonus + 50 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). Third-party reviews list a $30 minimum, 30x (bonus + deposit) on slots and no max cashout for code MAD275, and say the casino runs RTG games only. Michigan's Gaming Control Board named Slot Madness in an August 14, 2025 cease-and-desist. See the Slot Madness review.
SlotoCash Casino: $6,000 Welcome Bonus + 60 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). The casino's welcome bonus terms (opens in a new tab) say 25x (deposit + bonus), $20 minimum per bonus and no max cashout, and they bar video poker and table games under the bonus. Michigan's board named SlotoCash in a cease-and-desist on October 8, 2026. Read the SlotoCash review.
The low-edge games in this guide are usually excluded or weighted down when you play with bonus funds. The house edge means losses are the likely outcome over time; for confidential help, call 1-800-MY-RESET (1-800-697-3738).
Ad21+ (18+ where allowed). Ranked by us in a commercial order; we earn commission from these links. Advertiser disclosure
Offshore casinos, not licensed by any US state. Check your state's law before you play; 21+ (18+ where allowed) and terms apply.
Royal Ace Casino#6 on our listSlots and specialty games
Published terms (reported): Third-party reviews disagree on the package (200% up to $4,000, or 250% up to $2,500 + 35 spins); the casino site could not be checked directly. Eligible games: Slots and specialty games (reported).
Who runs it: License not shown; third parties report Costa Rica or none. Regulator notes: Third parties report it does not accept Ohio players.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus on slots (reported). Max cashout: 10x deposit (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
Published terms (reported): Third-party reviews report a 275% match up to $2,750 with code MAD275; the casino site could not be checked directly. Eligible games: Slots and keno (reported).
Who runs it: License not shown; third parties report Anjouan, Costa Rica or none. Regulator notes: Named in a Michigan Gaming Control Board cease-and-desist release, August 14, 2025.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus (reported). Max cashout: None (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
SlotoCash Casino#1 on our listBiggest bonus on our list
Published terms (casino terms): SlotoCash advertises up to $7,777 + 300 spins over five deposits on its own site. Eligible games: Slots, keno and scratch cards (progressive jackpots excluded).
Who runs it: License not shown on its site; reported as a Deckmedia N.V. brand (Curaçao). Regulator notes: Named in a Michigan Gaming Control Board cease-and-desist release, October 8, 2026.
21+ (18+ where allowed). New players. Min deposit $20 per bonus. Wagering 25x deposit + bonus. Max cashout: None stated. Withdrawal cap $5,000 / week. Terms source: casino terms. Terms apply. Offer checked October 28, 2026.
These casinos are offshore operators. They are not licensed or regulated by any US state, and state consumer protections do not apply. Check the law in your state before you play. Terms marked “reported” come from third-party reviews; the terms shown at sign-up apply.
21+ (18+ where allowed). Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: responsible gambling tools and free help. Gambling problem? Call or text 1-800-MY-RESET (1-800-697-3738).
Frequently asked questions
What does house edge mean in simple terms?
House edge means the share of each bet the casino expects to keep on average. If a game has a 3% edge, the casino keeps about $3 of every $100 wagered over the long run, although any single session can go either way. It equals 100% minus the game's RTP. Our RTP glossary entry covers the other side of the calculation, and the casino math basics guide goes further.
Which casino game has the lowest house edge?
Blackjack and video poker usually have the lowest house edge when played with correct strategy. Third-party sources list RTG's Super 21 at a 99.6% RTP, a 0.4% edge, and Jacks or Better at 99.54%, a 0.46% edge. Mistakes raise the edge quickly, and bonus terms often exclude these games. See our blackjack page and the video poker strategy guide.
Is a 5% house edge high?
A 5% house edge is moderate for slots and high for table games. On a slot it means about $5 lost per $100 wagered on average; on European roulette the edge is 2.7%. Because slots are fast, a 5% edge can cost far more per hour than the number suggests. Compare titles on our slots hub and in the house edge guide.
Does the house edge apply to every single bet?
Yes, the house edge applies to every bet you place, win or lose. It doesn't mean you lose that percentage on each spin; it means that over many bets your results drift toward that average cost. That is why the total amount wagered, not your deposit, drives expected losses. Our gambling budget guide and the page on chasing losses explain how to keep that cost in check.
Can you beat the house edge in the long run?
No, you cannot overcome the house edge in the long run with betting patterns or timing. Correct strategy can reduce it in blackjack and video poker, but the casino keeps an advantage on every standard game. Short-term wins happen, which is part of the entertainment, but they are variance, not a method. Read is Martingale a good strategy and the casino myths guide.
How is house edge different from volatility?
House edge tells you the average cost of playing, while volatility tells you how bumpy the results are along the way. Two slots with the same 4% edge can feel completely different: one pays small wins constantly, the other goes quiet and then pays big. Both cost the same on average. See our volatility meaning entry and the slot volatility guide.
What is the house edge on American roulette?
The house edge on American roulette is about 5.26%, almost double the 2.7% on a single-zero European wheel. The double-zero wheel has 38 pockets but still pays 35 to 1 on a single number, so you lose two units for every 38 staked on average: 2 ÷ 38 = 5.26%. On $1,000 of total bets that’s an average cost of $52.60, against $27 on European roulette. Payouts are identical, so the extra pocket is pure cost. See our American roulette entry and is roulette better than slots answer.
What is the house edge on online slots?
The house edge on an online slot is 100% minus its RTP, so a 96% RTP slot keeps about 4% of every dollar wagered over the long run. RTG’s Bubble Bubble is listed at 95% RTP by third-party sources, a 5% edge, or $5 per $100 wagered on average. Many RTG slots have no published RTP, so their edge is unknown until you check the game’s help screen. Slots also play fast, so a moderate edge costs more per hour than it sounds. Our how slot RTP works guide explains the figures.
Which casino games have the highest house edge?
Among RTG titles with published figures, specialty games and some wild-card video poker carry the highest house edge. Third-party sources list Fish Catch at 91% RTP, a 9% edge, and Sevens Wild at 93.15%, a 6.85% edge; Banana Jones and Fu Long Plinko are listed at 95%. That means $9 lost per $100 wagered on Fish Catch, against 46 cents on Jacks or Better played well. Games such as RTG keno have no published return, so check before you play. See our Fish Catch page and what is the best casino game to win.
Is the house edge lower at legal online casinos in Delaware?
Not necessarily: the house edge comes from each game’s rules and pay table, not from who licenses the casino. What Delaware adds is oversight. Its online casino games run through Delaware Park, Bally’s Dover and Harrington under the Delaware Lottery, authorized by the Gaming Competitiveness Act of 2012, with a minimum age of 21. State officials say real-money games from unlicensed operators violate Delaware law. Offshore casinos face no state audit of their games. See our Delaware page and player protections offshore vs licensed.
How does the house edge affect a $100 deposit?
The house edge works on everything you wager, so a $100 deposit can cost far more or less than its edge suggests, depending on how many times you replay it. At $1 a spin on a 96% slot, each spin costs about 4 cents on average; if you keep betting winnings back until you’ve wagered $1,000, the average cost reaches about $40. Wager $2,500 and it’s about $100, the whole deposit. Stopping sooner keeps more of it. Our how much should I deposit answer helps you plan.
How big is the house edge on RTG Tri Card Poker?
RTG’s Tri Card Poker is listed by SlotCatalog at 95.51% RTP, which means a house edge of about 4.49%. That makes it costlier than European roulette at 2.7% and far costlier than well-played blackjack variants such as Super 21 at 0.4%. On $500 of total bets, the average cost would be about $22.45. As with other card games, the figure assumes the standard play decisions, and side bets may carry a different return. Check the help screen for the version you open. See our Tri Card Poker page and how to play three card poker guide.
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