Martingale Roulette: Why It Doesn't Beat the House Edge
The Martingale system says: double your bet after every loss, so your next win recovers everything and nets you one unit of profit. It's the most famous roulette staking system — and it does not change your expected loss by a single cent. Here's why, and a simulator to test it yourself.
Bankroll
$1000
Spins
0
Realized edge
—
Theoretical edge
5.26%
Test it yourself
Try doubling your bet amount by hand after every loss you see above, and resetting it after a win. Run enough spins and you'll see the same pattern every time: long stretches of small profit, punctuated by a losing streak large enough to erase them and then some. That's not bad luck — it's the house edge showing up exactly where the math says it will.
Every spin has the same fixed house edge regardless of what you bet or how much you've already lost. A staking system can change how large your wins and losses are and how they're distributed across a session — it cannot change that underlying probability.
Frequently asked questions
Does the Martingale system work in roulette?
No. Doubling your bet after every loss does recover previous losses when you eventually win, but it doesn't change the house edge on any individual spin. Every spin is independent — the wheel has no memory of previous results — and table limits or bankroll limits eventually stop you from doubling far enough to guarantee a win.
Why does Martingale feel like it works?
Because most sessions end in a small win before a long losing streak forces a bet past the table limit or your bankroll. The occasional catastrophic loss is rare enough to feel avoidable, but it's mathematically inevitable over enough sessions — and its size is large enough to erase many small wins.
Is there any staking system that beats the house edge?
No. Every staking system — Martingale, Fibonacci, D'Alembert, Labouchère — changes how your bets are sized and how variance is distributed across a session, but none of them changes the probability of any given spin. The house edge is fixed by the wheel, not by your bet sizing.