La Partage is a French roulette rule that returns half of an even-money bet when the ball lands on zero. It usually applies only to red/black, odd/even, and high/low. On those qualifying bets, La Partage cuts the effective house edge from 2.70% to about 1.35%. It does not protect inside bets, dozens, columns, or call bets.
Quick Facts
- La Partage means “the sharing” or “the split.”
- It applies when zero lands against a qualifying even-money bet.
- The player loses half the stake and gets half back.
- It normally applies only to red/black, odd/even, and high/low.
- It reduces the effective edge on those bets to about 1.35%.
- It does not make roulette beatable.
- It is simpler than En Prison because settlement happens immediately.
Plain Talk
La Partage is the cleanest player-friendly rule in roulette.
You bet on black. Zero lands. In normal roulette, the whole bet loses. With La Partage, the dealer splits the bet: half goes to the house, half comes back to you.
That small rule has a big mathematical effect because zero is the source of the casino’s edge on even-money bets. Cut the zero loss in half, and you cut the effective edge in half.
The Wizard of Odds roulette guide describes the half-back rule as returning half of an even-money bet on zero. Rules and procedures still depend on the casino, so players should also understand formal table controls found in documents such as the Massachusetts roulette rules and approved game references such as the Nevada approved games rules of play page.
How It Works
La Partage needs three conditions:
- The table offers the rule.
- You place a qualifying even-money bet.
- The result is zero.
If all three are true, the bet is split.
| Your bet | Result | Normal roulette | La Partage roulette |
|---|---|---|---|
| $20 on red | Red | Win $20 profit | Win $20 profit |
| $20 on red | Black | Lose $20 | Lose $20 |
| $20 on red | Zero | Lose $20 | Lose $10, get $10 back |
The rule is not usually optional. If the table says La Partage applies, the half-return happens automatically on qualifying bets.
The important word is qualifying. A straight-up number, split, street, corner, six-line, dozen, column, or call bet normally loses in full if zero lands.
Scope guard: this page is about La Partage specifically. For the locked-bet version of the zero rule, read En Prison rule. For the wider game format, read French roulette rules.
Roulette Table Example
You are playing a $25 minimum French roulette table. You put $25 on even.
The dealer spins. The ball lands on 0.
The dealer cuts the bet. The house keeps $12.50 and returns $12.50 to you. If the casino uses chips that cannot split exactly, the house rules define rounding or chip-handling procedure. Do not assume rounding favors you.
Now compare that with a normal single-zero table. The same $25 on even loses in full when zero lands.
The difference is not emotional. It is mathematical. La Partage reduces the damage of the only extra losing outcome on an even-money bet.
From the Casino Side:
La Partage is easy to explain but must be cleanly controlled. Dealers need to know which bets qualify, how to split odd chip amounts, how to announce the rule, and when the rule does not apply.
For the floor, signage matters. If a table has single zero but no La Partage, players should not be left guessing. If a table offers La Partage only in certain areas, limits, or game versions, that must be clear.
From a game-management view, La Partage can be worth offering because it attracts informed players. The casino gives up some edge on even-money bets, but the game still remains negative expectation. Higher minimums, longer play, and premium positioning can compensate.
Surveillance cares about settlement. A half-return on zero creates a unique chip movement that must be visible and consistent. Mistakes are easy to spot when the rule is known.
Common Mistakes
- Thinking La Partage protects every roulette bet.
- Calling it a strategy instead of a rule.
- Assuming all French roulette tables offer it.
- Forgetting that zero still costs half the even-money stake.
- Thinking the rule changes the chance of red, black, odd, even, high, or low.
- Ignoring table minimums because the edge is lower.
- Confusing La Partage with En Prison.
Hard Truth
La Partage is one of the few roulette rules that genuinely helps the player. It helps by reducing the loss, not by creating a winning game.
FAQ
What does La Partage mean in roulette?
It means the even-money bet is split when zero lands. The house keeps half and returns half to the player.
Which bets qualify for La Partage?
Usually only even-money bets: red/black, odd/even, and high/low.
Does La Partage apply to dozens or columns?
Normally no. Dozens and columns are not even-money bets.
Does La Partage reduce the house edge?
Yes. On qualifying even-money bets, it reduces the effective edge from 2.70% to about 1.35%.
Is La Partage better than normal European roulette?
Yes, for qualifying even-money bets. For other bets, the edge is usually the same as standard single-zero roulette.
Is La Partage the same as En Prison?
No. La Partage returns half immediately. En Prison holds the whole bet for another spin or later settlement, depending on rules.
Should beginners look for La Partage?
Yes, if they plan to play even-money bets and the table minimum is reasonable. Use the expected loss calculator to compare real cost.
Deeper Insight
La Partage is powerful because it attacks the exact part of roulette that creates the edge on even-money bets.
A fair red/black game on 36 numbers would have 18 red and 18 black. If red pays 1 to 1, neither side has an edge in the long run.
Roulette adds zero.
Now a red bettor has 18 winning outcomes and 19 losing outcomes: the 18 black numbers plus zero. That one extra losing pocket creates the 2.70% single-zero edge.
La Partage does not remove zero. It halves the financial effect of zero on qualifying bets. That is why the edge drops to roughly 1.35%, not 0%.
This also explains why the rule does not help straight-up bets. On a straight-up number, zero is not the only problem. There are 36 losing pockets against one winner on a European wheel. The 35 to 1 payout is short by one unit because of the zero. Returning half only on even-money bets does nothing to that structure.
Players should use La Partage as a rule-selection advantage, not as a betting-system foundation. A Martingale on a La Partage table still faces table limits, bankroll limits, and negative expectation. The rule lowers the price. It does not make doubling safe.
Formula / Calculation
Normal single-zero even-money EV for a $1 bet:
$$EV = \left(\frac{18}{37} \times 1\right) - \left(\frac{19}{37} \times 1\right)$$
$$EV = -\frac{1}{37} = -2.70%$$
La Partage EV for a $1 even-money bet:
$$EV = \left(\frac{18}{37} \times 1\right) - \left(\frac{18}{37} \times 1\right) - \left(\frac{1}{37} \times 0.5\right)$$
$$EV = -\frac{0.5}{37} = -1.35135%$$
Rounded:
$$House\ Edge \approx 1.35%$$
Expected loss on $2,000 total action:
$$Expected\ Loss = 2000 \times 0.0135 = 27$$
Formula Explanation in Plain English
With normal single-zero even-money betting, zero makes you lose the whole bet. With La Partage, zero makes you lose only half.
Since zero is the extra pocket that creates the edge, cutting the zero loss in half cuts the edge in half.
Related Reading
Use this page with French roulette rules and En Prison rule so you understand both protected-zero rules. For the bigger price picture, read roulette odds, roulette house edge, and house edge with La Partage. To test your own bet size and spin count, use the expected loss calculator or house edge calculator. If you are tempted to combine La Partage with a progression, read why roulette systems fail.