“The house edge” sounds like one thing applied to everything, as though a fee were skimmed off each round. It is not. It is a consequence of a game’s structure, and almost every game builds it differently.

Once you can see the mechanism in a particular game, the number stops being a fact you memorise and becomes something you can reason about.

Roulette: the zero

The cleanest example anywhere. Our wheel is single zero — 37 pockets, numbered 0 to 36.

Back a single number and the true odds against you are 36 to 1. The payout is 35 to 1. That one-pocket gap is the entire edge, and it works out at exactly 1 in 37, or about 2.70%.

Every bet on the table is priced as if the zero did not exist. Red, black, odd, even, dozens, corners — all of them pay as though there were 36 pockets. The zero is the whole business model, and it is why a double-zero wheel is a substantially worse game: two pockets missing from the pricing instead of one.

Baccarat: a commission

Baccarat has the unusual problem of a bet that would otherwise be too good. Banker wins slightly more often than Player, because it draws after Player and with knowledge of Player’s third card.

Rather than change the rules, the house charges 5% on winning Banker bets. Banker still ends up the best bet on the table at roughly 1.06%, with Player around 1.24%.

The Tie bet is a different animal: 8 to 1 on something that happens closer to one hand in ten, which prices out at about 14.4%. Same table, same felt, an edge more than ten times the size.

Blackjack: acting first

No zero, no commission, and yet the house still wins. The mechanism is turn order.

You act before the dealer, so if you bust you lose immediately — even when the dealer would have busted on the same hand. You both break about as often; only one of you is paid when you both do.

Against that sits a natural paying 3:2, and the freedom to double or to stop drawing whenever you like — none of which the dealer has. The push and pull between those makes blackjack the tightest game in most casinos.

Thai Hi-Lo: an excluded outcome

Hi and Lo look like a coin flip on the total of three dice. The catch is in the exception: triples are excluded from both.

So there is a set of outcomes where neither of the two main bets wins. That exclusion is doing exactly the job the zero does on a roulette wheel — a slice of the probability space that belongs to neither side.

The exotic bets on the board price their own risk. A six alongside a Lo total pays 10 to 1 precisely because you have asked for two things that pull against each other.

Pok Deng: the dealer’s script

Pok Deng is nearly symmetrical, which makes it interesting. The deng multiplier applies equally to wins and losses, so it magnifies swings without favouring anyone.

The asymmetry is in the drawing rule: the dealer draws on 4 or below and stands on 5 or above, playing a fixed script with the benefit of acting after you. As in blackjack, the edge is in the order of play rather than in the payouts.

Chui Niu: no edge at all

Worth including as the exception. Chui Niu is players against each other, not against a house. Whatever one player loses another wins, and there is no structural margin anywhere in the round.

Games like this are the only ones where being better at it actually changes your results over time.

The pattern

Four mechanisms cover almost everything: a pocket or outcome that pays nobody, a commission on a bet that would otherwise be too strong, an order of play that makes one side act first, and payouts set slightly below true odds.

None of them is hidden. All of them are in the rules, in plain sight, and none of them can be strategised away — which is the honest reason to treat any of these games as something you pay for rather than something you profit from.

Everything above runs on play chips here, with no cash-out, which is our answer to the whole question.

The house edge in more depth · Why systems cannot beat it · The games