Starting point
Roulette is a game of chance with a built-in house edge. No strategy, system, pattern or timing changes the odds in the player’s favor over time, and most players lose money over time. Nobody should gamble money they cannot afford to lose. This article describes variants and extra bets so you can recognize them and understand their cost. It does not recommend any, and it names no products or operators.
The question to ask of any variant
Every change to the standard game can be analyzed the same way. List the equally likely outcomes, work out which ones win, compare the payout with what a fair payout would be, and look at what is being taken from the player in return for whatever is new. Whatever the presentation, the long-run average is determined by those few numbers, and a format that adds excitement usually does so at the same or a higher cost per unit staked.
Wheel formats
European (single zero). 37 pockets, numbers 0 to 36. The house edge on standard bets is 1 in 37, about 2.70 percent.
American (double zero). 38 pockets, with a 0 and a 00. With the same payouts, the edge is 2 in 38, about 5.26 percent. The extra pocket is the whole difference: the number of zero pockets sets the edge.
French. The wheel is the same as the European one. The differences are usually in the layout language and in the rules for even-money bets, where a partial return such as en prison or surrender is common. When present, such a rule lowers the edge on those bets, typically cutting it roughly in half. The French table may also offer “call” bets covering sections of the wheel, discussed below.
Mini roulette. A smaller wheel, typically with 13 pockets numbered 0 to 12. With fewer pockets, each bet wins more often, but payouts are scaled down, and rules about the zero are often less favorable. The edge on a mini wheel with standard payouts can be higher than on a full wheel, so a smaller game is not necessarily a cheaper one. The exact figure depends on the rules at a given table, so check them rather than assume.
Wheels with more than two zeros. Some places have used wheels with three zero pockets. By the same arithmetic, three zeros out of 39 pockets would give an edge of 3 in 39, about 7.69 percent, if payouts were unchanged.
Format changes
Multiple balls or wheels. Several balls or several wheels are spun in a round. Each spin is still an independent random event, and each bet on each result has the same edge as before. More outcomes per round just means more is wagered per unit of time.
Speed-up formats. Faster rounds and automated wheels give more rounds in an hour. The edge per spin is unchanged but total hourly cost rises with the number of rounds, and game speed alone can raise what an hour of play costs.
Random multipliers. Some live and electronic versions pick a few numbers at random each round and attach a multiplier to them, so a straight bet on that number pays more than 35 to 1. The headline payout looks much richer, but to offset it the payouts on other bets are often reduced. Whether the overall cost goes up or down depends on the specific payout table, and the only way to know is to run the numbers for that table. A bigger possible prize generally also means a rarer one, which affects statistical variance more than expected cost.
Live and electronic versions. Streamed tables with a human dealer follow the physical wheel. Electronic versions that run on random number generators are decided by software. In either case, the rules and payouts posted for that game are what matter, not the presentation.
Side bets and added bets
A side bet is an extra wager that sits alongside the standard bets. Some pay on a feature of the result, such as a particular sequence of outcomes across rounds, or on a combination of numbers not found on a standard layout. Others are jackpot-style bets that pay a large amount for a rare event.
Call or announced bets. On a racetrack-style layout, players can name groups of neighboring pockets on the wheel, and the dealer places the chips on the layout. These are made of standard bets, so the edge is the same as the standard bets they consist of.
Priced extras. Genuine added bets have their own payout tables. A hypothetical example: a side bet that wins if the ball lands in any of 3 specific pockets out of 37, paying 10 to 1. It wins 3 times in 37 and loses 34 times in 37. Per unit staked: (3 × 10 − 34) ÷ 37 = −4 ÷ 37, about −10.8 percent. That is roughly four times the 2.70 percent edge on standard bets. The numbers are invented for illustration, but the pattern is typical: side bets, when they are not just repackaged standard bets, tend to cost more per unit staked.
Jackpot-style bets. Bets that contribute to a large prize are usually priced so that the small chance of a big payout is balanced against a high ongoing cost.
Why added features exist
Variants and side bets are part of how game design holds attention. A rare large prize works like the variable rewards in other games: unpredictable wins keep play interesting even if the average result is no better. Operators may also use them to differentiate one table from another. This is not a criticism of any format, only a reminder that the extra feature was added for a reason, and the cost can be hard to see.
A short checklist for any new format
- How many equally likely outcomes are there?
- Which outcomes win, and what does each pay?
- Compare the result with a fair payout, then compute the average loss per unit staked.
- Are other bets’ payouts reduced to fund a feature?
- How many rounds per hour does the format allow?
- Are the rules clearly stated, and does anything about the presentation make the cost harder to see?
If the answers are unclear, the cost is unclear. No variant moves the long-run result into the player’s favor.
Keeping it in proportion
Choosing a variant is mostly a choice about entertainment and cost, not about winning. Setting spending limits before you start, and stopping when you reach it, matters more than which variant is on the table. If gambling is becoming a problem, a local support service can help.