Martingale Strategy Simulator

Does doubling down after every loss actually work? Run thousands of simulated sessions and discover why casinos love Martingale players.

Quick Presets

Configure Simulation

Starting Bankroll

Your starting balance

Base Bet Size

Minimum wager each round

Win Probability

Chance of winning each bet

Win Payout

Multiplier on win (2x = even money)

Max Bet Limit

Table limit / max allowed bet

Sessions

Number of sessions to simulate

Bets per Session

Rounds played per session

Why Martingale Doesn't Work Long-Term

Negative Expected Value

Every casino game has a house edge. With your current config (48.65% win rate, 2x payout), the expected value per base bet is:

EV = (0.4865 × $1.00) − (0.5135 × $1) = -0.0270

No betting system changes this fundamental math. Martingale doesn't alter the expected value, it only changes the distribution of outcomes. You trade many small wins for rare, devastating losses.

Table Limits Destroy the Strategy

With a $10 base bet, after just 9 consecutive losses you need to bet $5,120. After 10 losses: $10,240. Most tables cap at $5,000-$10,000. When you hit the limit, the strategy breaks and you absorb the full cumulative loss.

1$10$10

2$20$30

3$40$70

4$80$150

5$160$310

6$320$630

7$640$1,270

8$1,280$2,550

9$2,560$5,110

10$5,120$10,230

The Gambler's Ruin

Given infinite time, a player with finite bankroll playing a negative-EV game will always go bust. Martingale accelerates this by requiring exponentially larger bets. The probability of a losing streak of length n in k bets approaches 1 as k grows. It's not a question of if, but when.

For a 48.65% game, the probability of 7+ consecutive losses in 50 bets is approximately 19.2%. Over 500 bets, it rises to 90.5%.

Understanding the Martingale Betting System

The Martingale system is the oldest and most well-known progressive betting strategy in gambling. The concept is deceptively simple: double your bet after every loss so that the first win recovers all previous losses plus a profit equal to the original stake. After any win, you reset to the base bet and start again. It sounds like a guaranteed money-maker, and that is exactly why it has ruined more bankrolls than any other betting system in history.

The Appeal: Why People Keep Trying It

The Martingale system is seductive because in short sessions, it works most of the time. A player betting $10 on red at roulette will win small amounts consistently, session after session, creating the illusion of a reliable income stream. The math shows that with a 48.6% win probability on European roulette, you will win any individual Martingale sequence about 98.6% of the time. But that remaining 1.4% is where the catastrophic losses hide, and over enough sessions, those losses will more than erase every small win you have accumulated.

Why Martingale Fails: The Mathematical Proof

The fundamental flaw in the Martingale system is that it does not change the expected value of your betting. The house edge applies to every single bet you place, regardless of its size. If the house edge is 2.7% on European roulette, your expected loss is 2.7% of your total amount wagered, whether you bet flat $10 every spin or follow a Martingale progression. The system merely redistributes your outcomes: many small wins and rare devastating losses, but the average result over time remains exactly the same. No betting pattern can overcome a negative expected value game without changing the underlying odds.

Table Limits: The Practical Killer

Even if you had infinite money, casinos impose table limits that make the Martingale system physically impossible to sustain. After just 7 consecutive losses from a $10 base bet, you need a $1,280 bet to continue. Most tables with a $10 minimum have a $500 or $1,000 maximum, ending the progression before it can recover. Even at a high-limit table, 8 losses deep means risking over $2,500 to win just $10 in profit.

Gambler's Ruin: The Long-Run Reality

The Gambler's Ruin theorem proves that a player with a finite bankroll playing a negative expected value game will eventually go broke with probability approaching 1, given enough time. The Martingale system accelerates this by concentrating risk into exponentially growing bets. A flat bettor losing 2.7% of $10 per spin loses about $0.27 per spin on average. A Martingale bettor has the same average loss rate per spin, but experiences it as long winning streaks punctuated by sudden, ruinous drawdowns. The variance is dramatically higher, which means the probability of hitting your ruin threshold in any given session is significantly elevated.

When People Still Use Martingale

Despite its flaws, some players use modified Martingale strategies for short, well-defined sessions with strict stop-loss limits. The idea is to exploit the high short-term win rate (small frequent gains) while accepting the occasional large loss as a known cost. This does not change the expected value, but it does change the distribution of outcomes in a way some players prefer. If you choose this path, define your maximum number of progressions before you start, never chase beyond your limit, and understand that you are trading a high win-rate for a worse risk-reward ratio.

Doubling Progression from a $10 Base Bet

Loss #	Bet Size	Cumulative Risk	Required Bankroll	P(Reaching)
1	$10	$10	$30	51.4%
2	$20	$30	$70	26.4%
3	$40	$70	$150	13.6%
4	$80	$150	$310	7.0%
5	$160	$310	$630	3.6%
6	$320	$630	$1,270	1.8%
7	$640	$1,270	$2,550	0.9%
8	$1,280	$2,550	$5,110	0.5%

Compare this approach against other systems using our strategy simulator, plan your bankroll with the bankroll calculator, and set session boundaries using the session planner.

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Martingale and progressive betting systems do not change the house edge. While they can produce short-term wins, the math guarantees that eventual ruin is certain when facing a negative-edge game with finite bankroll. The "double after loss" illusion is the most dangerous misconception in gambling, this simulator exists to show you why, not to encourage the strategy. If you or someone you know has a gambling problem, call 1-800-522-4700.