Casino Game House Edge: What the Numbers Mean
No ordinary casino game gives a player a guaranteed edge simply by choosing its name. A house edge is the average expected loss as a percentage of the amount staked under specified rules and play. A lower edge means a lower long-run expected cost, not that you are likely to profit in a short session. This NZ guide compares examples and explains why table rules, paytables and decisions matter. Last reviewed: 27 September 2026.
House edge versus a session result
On a standard single-zero roulette wheel, the usual 35:1 payout on a single number produces an edge of about 2.70% of stakes. If $1,000 is staked over many spins, the theoretical average loss is about $27 under those rules. That does not predict a $27 loss for an individual session: actual results can be a large win, a total loss or anything between. Re-staking winnings increases total turnover and expected cost.
Return to player (RTP) is often expressed as the complementary long-run percentage for a game with the same calculation basis: a 2.70% edge corresponds to about 97.30% theoretical return. Definitions can vary across games with pushes, multiple bets or jackpots, so read how a quoted figure was calculated.
Examples under stated rules
| Game or bet | Illustrative house edge | Conditions to check |
|---|---|---|
| European roulette | About 2.70% | Single zero, standard payouts |
| American roulette | About 5.26% | Zero and double zero, standard payouts |
| Baccarat Banker | About 1.06% | Standard eight-deck punto banco, 5% commission |
| Craps pass line | About 1.41% | Standard pass-line rules, per initial bet made |
| Blackjack | Varies | Natural payout, decks, dealer rules and basic-strategy decisions |
| Video poker | Varies | Exact paytable, bet size and decision strategy |
These are examples, not current offerings at a named casino. The roulette figures follow from the wheel pockets and usual payouts. For craps, Wizard of Odds’ original bet analysis distinguishes edge per bet made, resolved bet and roll. Its baccarat analysis uses specified rules; a no-commission variant can pay differently. Read the actual table before comparing numbers across games.
Roulette: bet complexity does not erase zero
A straight-up number has a larger payout and lower chance of winning than red/black. On the same ordinary wheel with standard payouts, both carry the same house edge per amount staked. Complicated bets are not inherently better. A single-zero wheel has 37 pockets and a double-zero wheel has 38; the extra zero changes the edge. Some French tables offer La Partage on eligible even-money bets, which can reduce their edge to about 1.35% when zero lands. Check the exact rule. Our roulette guide shows the payout calculation.
Baccarat and craps: compare individual bets
Under standard commission-based baccarat rules, the Banker bet has a lower house edge than the Player bet, while the usual 8:1 Tie bet has a much higher edge. Commission-free tables may change a Banker payout instead of simply removing a fee. Betting a pattern of past Banker or Player results does not change the next hand’s rules. See the baccarat guide.
In craps, the pass-line bet and many side bets have different edges. An additional odds bet after a point is established may pay true odds and have zero edge on that additional amount under standard rules, but the required pass-line bet still has an edge. The combined wager is not a guaranteed profit or a risk-free strategy. Table limits and the exact bet rules matter.
Blackjack and video poker depend on decisions
Blackjack’s expected return depends on the natural payout (3:2 versus 6:5), number of decks, dealer soft-17 rule, doubling and splitting conditions, and the player’s decisions. A single-deck label alone does not establish a better game. Basic strategy must match the actual table; it can reduce expected losses but cannot guarantee winnings. See our blackjack guide.
Video poker also depends on its paytable and how cards are held or discarded. Two games with the same name can offer different returns. A published optimal-strategy figure assumes the correct paytable, maximum-coin conditions where relevant, and accurate decisions. The video poker paytable analyzer illustrates how changing a payout alters theoretical return. It is not evidence that a specific NZ operator offers that version.
Check offers, limits and NZ status
A bonus can change the effective cost of play only under its precise terms; wagering, game contribution, maximum bet and withdrawal limits can outweigh a headline amount. Check the current bonus guide and operator terms. As at 27 September 2026, New Zealand’s online casino licensing system is being phased in. DIA anticipates issuing NZ licences from early 2027; check DIA’s player guidance. An offshore licence or comparison score is not proof of NZ approval.
Gambling is for adults aged 18 and over. Set a spending and time limit, avoid chasing losses, and treat the house edge as a reminder that repeated play costs money on average. If gambling is causing harm, New Zealand’s free Gambling Helpline is available at 0800 654 655 or by text at 8006.
Casino house edge FAQ
What does a 2% house edge mean?
It means an average expected loss of about $2 per $100 staked under specified rules across many wagers. It is not a prediction for one player or visit.
Is a lower edge a guaranteed win?
No. It reduces the long-run expected cost, while short-run results can vary widely and the full stake can be lost.
Are complicated roulette bets better than red or black?
Not on an ordinary wheel with standard payouts. They cover fewer numbers and pay more when they hit, but the usual house edge is the same per amount staked.
Does single-deck blackjack always have the lowest edge?
No. Natural payouts and dealer, doubling and splitting rules can outweigh the deck count. Match strategy to the actual game.
Is a craps odds bet a free winning strategy?
No. The additional odds amount may have zero edge under standard rules, but it can lose and normally accompanies a pass-line wager with a house edge.
Does video poker have one fixed RTP?
No. The paytable, stake conditions and decisions determine theoretical return. Check the exact game version and its rules.
Why do baccarat Banker and Tie bets differ?
They settle at different payouts and frequencies. Under usual commission rules Banker has a relatively low edge, while a common 8:1 Tie bet has a much higher edge.
Can a bonus remove the house edge?
A promotion’s value depends on all of its terms. Wagering, eligible games, limits and the chance of losing before cash-out matter; a headline bonus does not guarantee positive returns.
