Direct Answer: Mathematically, the single best bet in roulette is an even-money outside bet (Red/Black, Odd/Even, High/Low) on a European wheel featuring the French "La Partage" rule, which carries a microscopic 1.35% house edge. On standard wheels without this rule, almost all bets carry the exact same mathematical house edge (2.70% on European wheels and 5.26% on American wheels). Meanwhile, the single worst bet in roulette is the 5-number "Basket Bet" on American wheels (0, 00, 1, 2, 3), which spikes the house edge to a punishing 7.89%.
Most casual gamblers believe that placing a chip on a single number (Straight Up) is a "riskier bet with worse odds" than betting on Red or Black.
In reality, the casino's mathematical advantage is identical across virtually the entire layout. The only difference is variance (volatility)—unless you know the specific rule sets and betting traps that fundamentally alter the house edge.
1. The Complete Roulette Bet & Payout Matrix
Every standard roulette wager falls into two categories: Inside Bets (placed on numbers inside the grid) and Outside Bets (placed on larger grouping boxes along the perimeter).
The table below displays the true mathematical odds, payouts, and house edge on a standard 37-pocket European single-zero wheel:
| Bet Type | Numbers Covered | Payout (Odds) | Win Probability (European) | Casino House Edge |
|---|---|---|---|---|
| Even-Money (La Partage) | 18 Numbers | 1 to 1 | 48.65% | 1.35% (Best Bet in Casino) |
| Red / Black, Odd / Even, 1-18 / 19-36 | 18 Numbers | 1 to 1 | 48.65% | 2.70% |
| Dozen / Column | 12 Numbers | 2 to 1 | 32.43% | 2.70% |
| Line Bet (Six Line) | 6 Numbers | 5 to 1 | 16.22% | 2.70% |
| Corner Bet (Square) | 4 Numbers | 8 to 1 | 10.81% | 2.70% |
| Street Bet (Trio) | 3 Numbers | 11 to 1 | 8.11% | 2.70% |
| Split Bet | 2 Numbers | 17 to 1 | 5.41% | 2.70% |
| Straight Up | 1 Number | 35 to 1 | 2.70% | 2.70% |
| Basket Bet (American 0, 00, 1, 2, 3) | 5 Numbers | 6 to 1 | 13.16% | 7.89% (Worst Bet in Roulette) |
2. Why Most Bets Have the Exact Same House Edge
Why does a 35:1 single-number bet have the identical house advantage as a 1:1 Red/Black bet?
Because the casino calculates payouts using 36 numbers, but spins a wheel containing 37 or 38 pockets:
- If you hit a single number on a European wheel, the true odds of winning are 1 in 37, but the casino only pays 35 to 1 (plus your original chip back).
- That missing 37th pocket—the green zero (0)—is where the house extracts its flat 2.70% margin across all standard wagers.
As explored in our comprehensive breakdown on whether all roulette wheels are the same, playing on an American Double-Zero wheel increases that house margin to 5.26%, while predatory Triple-Zero wheels hike it to 7.69%.
3. The Undisputed Best Bet: French Roulette with "La Partage"
If your objective is to minimize casino house edge, the single best wager in roulette is an outside even-money bet on a table governed by La Partage:
- How It Works: If you bet $20 on Black and the ball lands in the green zero (0), the house does not take your entire bet. Instead, the dealer refunds 50% ($10) directly back to you.
- The Mathematical Result: By cutting your loss on zero in half, the house edge on even-money bets drops from 2.70% down to 1.35%.
At 1.35%, French roulette rivals 3:2 blackjack and offers significantly better statistical value than high-denomination slot machines.
4. The Absolute Worst Bet: The American "Basket Bet"
While standard roulette bets share uniform house edges, there is one notorious exception that every player must avoid: The 5-Number Basket Bet.
Available only on American double-zero wheels, this wager covers five specific numbers: 0, 00, 1, 2, and 3.
- The Payout: 6 to 1.
- True Odds: 5 in 38 (13.16% win rate).
- The House Edge: A staggering 7.89%.
Mathematically, the Basket Bet is a catastrophic sucker bet that increases the house advantage by 50% compared to any other bet on the same layout.
5. Inside vs. Outside: Which Bet Should You Choose?
Because standard inside and outside bets share the same 2.70% house edge on European wheels, your choice depends entirely on variance tolerance:
- Choose Outside Bets If: You want extended session play, low drawdown risk, or plan to use structured bankroll progressions. However, avoid aggressive doubling traps as detailed in our guide on why the Martingale system fails.
- Choose Inside Bets If: You have a larger bankroll and are hunting asymmetric single-spin payouts (35:1) where short-term positive variance can deliver substantial returns.
Frequently Asked Questions
Are inside bets mathematically worse than outside bets?
No. On any standard European wheel, both inside straight-up bets (35:1) and outside even-money bets (1:1) share the exact same 2.70% house edge. Inside bets simply have higher variance and a lower hit frequency (2.7% vs 48.6%).
What is the safest bet in roulette?
The safest bets in terms of hit frequency are the outside even-money bets (Red/Black, Odd/Even, 1-18/19-36), which win 48.65% of the time on a European wheel and pay 1 to 1.
What happens to outside bets if the ball lands on green zero?
On standard American and European tables, all outside bets lose completely when the ball lands on zero. However, on French tables with the La Partage rule, half of your even-money wager is refunded.
Why is the 5-number bet in American roulette so bad?
The 5-number bet (0, 00, 1, 2, 3) pays 6 to 1, but fair mathematical odds dictate it should pay 6.6 to 1. This mathematical discrepancy elevates the casino's house edge from 5.26% to a punishing 7.89%.
Summary Key Takeaways
- The mathematically superior bet in all of roulette is an even-money outside wager with French La Partage rules (1.35% house edge).
- All standard inside and outside bets share the exact same mathematical edge (2.70% European / 5.26% American).
- Never place the 5-number Basket Bet (0, 00, 1, 2, 3) on American wheels, as it spikes the house edge to 7.89%.