The zero is the one pocket that belongs to the house
Every other number on the wheel pays as a number. The zero does not. When the ball settles in the green pocket, most bets on the table lose outright, a few are held over for the next spin, and the casino collects on the gap between what the zero pays and what a fair 36-number wheel would pay. That gap is not a malfunction or a special penalty. It is the built-in advantage that makes roulette a negative-expectation game for the player.
What happens to your money depends on three things: which wheel you are sitting at, which bets you have placed, and which rule set the table uses. The same spin can pay one player, hold another player's stake in limbo, and wipe a third player's outside bets completely.
European and American wheels treat the zero differently
Before any bet is placed, the wheel itself changes the arithmetic. A European wheel has 37 pockets: the numbers 1 through 36 plus a single zero. An American wheel has 38: the same numbers plus both a zero and a double zero. The extra pocket does not add a new way to win. It adds a second way for outside bets to lose.
| Feature | European wheel | American wheel |
|---|---|---|
| Pockets | 37 | 38 |
| Zero pockets | 1 (single zero) | 2 (zero and double zero) |
| Outside bets lose on | 0 | 0 and 00 |
| House edge on most even-money bets | Lower | Higher |
| Special zero rules (en prison, la partage) | Common on some tables | Rare or absent |
The table does not need to print the house edge for you to feel it. On a European wheel, the single zero means there are 37 pockets but a straight-up number pays as if there were 36. On an American wheel, the same payout structure applies with 38 pockets. The house keeps the difference over a very large number of spins.
Inside bets: the zero pays only when you bet on it
Inside bets are the wagers placed on the numbered grid. A straight-up bet on zero is the only inside bet that wins when the ball lands on zero and you have not covered it. If you placed a chip directly on the 0, it settles like any other winning straight-up number, at odds printed on the layout. If your inside bets were on other numbers, a split, a street, a corner, or a line, the zero is simply not part of those combinations unless the bet was specifically constructed to include it.
Some players cover the zero as a hedge while betting other numbers. That is a legitimate bet selection, but it is not a way to remove the edge. Every chip placed on the zero carries the same negative expectation as any other straight-up bet under the same rule set. The zero is not lucky, due, or protective. It is a number with the same payout as any other, and the wheel has no memory of where it landed last spin.
Outside bets: the zero is where even-money bets die
Outside bets are the wagers on red or black, odd or even, high or low, dozens, and columns. None of them include the zero. When the ball lands on 0, every even-money outside bet loses in full on a standard table. The dozen and column bets also lose, because the zero sits outside all three dozens and outside all three columns.
This is the moment the zero does its work. A player betting red and black simultaneously, or odd and even, has covered every number except the zero. On a European wheel, that means 36 of 37 pockets are covered, and the uncovered pocket is the one that takes the entire stake. On an American wheel, the zero and double zero are both uncovered, which is why the American layout has a larger built-in advantage on the same bets.
| Bet type | Wins on zero? | What happens on a standard table |
|---|---|---|
| Straight-up on 0 | Yes | Pays as a winning number |
| Straight-up on any other number | No | Loses |
| Split, street, corner, line including 0 | Yes | Pays at the combination's odds |
| Split, street, corner, line excluding 0 | No | Loses |
| Red/black, odd/even, high/low | No | Loses in full |
| Dozens or columns | No | Loses in full |
En prison and la partage: when the zero only half-kills an even-money bet
Some European tables soften the zero's effect on even-money bets with one of two rules. Under la partage, an even-money bet that loses to the zero returns half the stake to the player immediately. Under en prison, the losing even-money bet is not collected at all. It is held in place, imprisoned on the layout, and resolved on the next spin. If the next spin wins, the stake is returned without profit. If the next spin loses, the stake is collected.
These rules change the expected rate of loss on the affected bets, but they do not create a winning game. They reduce the house edge on even-money bets only, and only when the rule is in force. A table that advertises la partage on black but not on red, or that applies it only to certain stakes, is not offering it uniformly. The rule is printed on the table layout or displayed on the electronic table screen, and it is worth reading before the first chip goes down.
How a round settles when the zero hits
The sequence is the same as any other spin, but the zero makes the dealer's movements worth watching. The ball drops, the dealer calls the number, and a marker is placed on the winning pocket. Winning inside bets on the zero are paid first. Losing inside bets are swept. Even-money outside bets are then either collected or, if the table uses en prison, left in place with a marker. The next spin resolves any imprisoned bets before new bets on that spot are accepted.
For the player, the practical point is that a zero spin is not a pause in the game. It is a settlement event. Money moves, bets are collected, and the next round begins with a different set of chips on the layout. If you are tracking your session, a zero spin is a loss on most bets, a win on a covered zero, or a half-loss under la partage. None of those outcomes is a sign about the next spin.
Why the zero exists and what it does to the arithmetic
The zero is the mechanism that makes roulette profitable for the house without the house needing to cheat. If the wheel had 36 pockets and paid every number as if there were 36, a player covering every number would break even, and the game would have no reason to exist as a business. The zero creates a pocket that pays as a number but is not covered by the outside bets that most players use to feel safe.
House edge and RTP are complements: they sum to 100% for the same bet under the same rule set. The zero changes that split on every bet it affects. An even-money bet on a single-zero wheel has a different expected rate of loss than the same bet on a double-zero wheel, because the second wheel has an extra pocket that kills the bet. The difference is not a secret and it is not a trick. It is printed in the structure of the wheel, and it is the first thing a player should compare when choosing between tables.
What a new player usually gets wrong about the zero
The most common mistake is treating the zero as a special win. It is not a jackpot pocket. It pays the same as any other straight-up number, and on most bets it is a loss. The second mistake is assuming that covering the zero as insurance makes the rest of the layout safer. It does not. It adds another bet with its own negative expectation, and it does not change the edge on the bets it is meant to protect. The third mistake is chasing the zero after it appears, on the belief that it is now less likely to appear again. The wheel has no memory. A zero on the last spin does not change the probability of a zero on the next spin.
None of this means the zero should be feared. It means it should be understood. Before you sit down, check which wheel you are on, read the printed rules for even-money bets, and decide whether you are betting the zero as a number or simply accepting it as the cost of the outside bets you prefer. That decision is the only part of the zero's behaviour that is under your control.
FAQ
Does the zero pay more than other numbers?
No. A straight-up bet on zero pays at the same odds as a straight-up bet on any other single number. The zero is not a bonus pocket. Its significance is that it is excluded from the even-money and outside bets, not that it pays a premium when hit.
What happens to an en prison bet if the next spin is also zero?
The imprisoned bet loses, because the next spin did not win. Under en prison, an even-money bet held over from a zero spin is returned only if the following spin wins. A second zero, or any other losing outcome, means the stake is collected.
Is it better to play a table with la partage?
For even-money bets, la partage reduces the expected rate of loss compared with a table that collects even-money bets in full on a zero. That is a rule-set difference, not a way to win. The rule applies only to the bets it names, and the rest of the layout is unaffected.
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