La Partage and En Prison Roulette Rules: Lower House Edge

Not all roulette wheels are equal. French roulette tables that use the la partage or en prison rules cut the house edge on even-money bets roughly in half compared with standard European roulette. For players who enjoy roulette, understanding these rules is one of the easiest ways to improve long-run value. This guide explains how each rule works, shows the math and explains how to find the best versions online.

Why Roulette House Edge Varies

Roulette's house edge comes from the zero pockets. An American wheel has 38 pockets, including 0 and 00, which produces a house edge of about 5.26%. A European wheel has 37 pockets with a single zero and a house edge of 2.70%.

Quick answer: La partage returns half your even-money stake when the ball lands on zero, and en prison holds your bet for one more spin. Both cut the house edge on even-money bets from 2.70% to 1.35% on a single-zero French roulette wheel, making them the best roulette rules for players.

These rules apply only to even-money outside bets such as red or black, odd or even, and high or low. Straight-up and other inside bets keep the normal edge.

How La Partage Works

La partage is French for "the split." When the ball lands on zero, even-money bets lose only half of the stake instead of the whole stake.

Example

You bet 10 on red. The ball lands on 0. Instead of losing 10, you receive 5 back and lose 5.

The Math

On a single-zero wheel, the probability of zero is 1 in 37, or about 2.70%. Without la partage, you lose your entire bet in that case. With la partage, you lose half. So the house edge on even-money bets becomes 2.70% multiplied by 0.5, which equals 1.35%.

How En Prison Works

With en prison, when zero comes up, your even-money bet is "imprisoned" and stays on the table for the next spin.

Possible Outcomes

• If your bet wins on the next spin, you get your original stake back with no profit
• If it loses on the next spin, you lose the stake
• If zero comes up again, some tables keep the bet imprisoned again, while others apply a different rule

The Math

The long-run edge for en prison is also about 1.35% on a single-zero wheel under standard rules, matching la partage. En prison feels different because you keep the chance of recovering your stake in full, which some players prefer psychologically. Over many spins the expected cost is similar.

Comparing Roulette Variants

• American roulette (0 and 00): 5.26% house edge on most bets
• European roulette (single zero): 2.70% house edge
• French roulette with la partage or en prison: 1.35% on even-money outside bets, 2.70% on inside bets

French roulette tables also use a different layout and French terms for bets, but the rules are what matter for value. If you want a broader view of how roulette compares with other games, our casino strategy section ranks them by edge.

What These Rules Do Not Change

It is important to keep expectations realistic. La partage and en prison improve the odds on outside bets, but they do not create an advantage for the player.

• The house still has an edge on every bet
• No betting system, such as the Martingale, overcomes the edge
• Inside bets are unchanged
• Variance remains high over short sessions

If you want to understand why systems fail, our article on the gambler's fallacy in casino games explains how independent spins work.

Where to Find French Roulette Online

Many licensed online casinos offer French roulette, including live dealer versions and RNG versions. Always read the rules panel in the game, because some tables use variants that differ from the standard.

What to Check Before You Play

• Whether the table is single-zero
• Whether la partage or en prison is applied
• Minimum and maximum bets
• Whether the game contributes to bonus wagering, since roulette often contributes little or nothing

On the last point, check the bonus terms carefully. Our guide to best casino bonuses explains how game weighting affects your offer, and our best live dealer casinos page lists operators with live roulette.

Best Bets on a French Roulette Wheel

If you want to minimize the house edge, stick to even-money outside bets with la partage or en prison in effect. Those are your lowest-cost options at 1.35%.

Bet Sizing and Bankroll

Even with a lower edge, set a session budget and a loss limit before you start. A fixed bankroll and time limit matter more than any rule variation. Our best online casinos page includes responsible gambling tools you can use at each operator.

Common Roulette Misunderstandings

• "Red is due after five blacks": Each spin is independent.
• "La partage means I win more often": It does not change win probability, only how zero is handled.
• "En prison is better than la partage": They have similar expected costs; preference is mostly personal.
• "I can beat roulette with a system": Systems change variance, not expected value.

Frequently Asked Questions

What is the house edge on French roulette with la partage?

On even-money bets the house edge is about 1.35% on a single-zero wheel. Inside bets retain the standard 2.70% edge.

Is la partage better than en prison?

Their long-run value is nearly identical. La partage settles immediately by returning half your stake, while en prison gives you another spin with your full stake at risk.

Does la partage apply to all roulette bets?

No. It applies only to even-money outside bets such as red or black, odd or even, and high or low.

Is French roulette better than European roulette?

Usually yes for outside bets, because la partage or en prison cuts the edge in half. European roulette without those rules has a 2.70% edge on every bet.

Conclusion: Pick the Right Wheel

Choosing a French roulette table with la partage or en prison is a simple way to lower the house edge. Remember that it remains a negative-expectation game, so play for entertainment and use limits. Explore our casino strategy guides and compare operators on our best online casinos list.