See why doubling your stake after every loss eventually fails. Run thousands of simulations and watch the classic pattern: slow climb, sudden cliff.
The Martingale system doubles your stake after every loss. Here's how quickly stakes escalate starting from just £10:
| Bet # | Stake | Cumulative Loss | Profit if Win |
|---|---|---|---|
| 1 | £10 | £10 | £10 |
| 2 | £20 | £30 | £10 |
| 3 | £40 | £70 | £10 |
| 4 | £80 | £150 | £10 |
| 5 | £160 | £310 | £10 |
| 6 | £320 | £630 | £10 |
| 7 | £640 | £1,270 | £10 |
| 8 | £1,280 | £2,550 | £10 |
| 9 | £2,560 | £5,110 | £10 |
| 10 | £5,120 | £10,230 | £10 |
After just 7 consecutive losses, you'd need to stake £640 — all to win back £10 profit. This is why the system fails: exponential risk for linear reward.
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Click the button to simulate thousands of Martingale betting scenarios instantly.
Watch bankroll trajectories and study the distribution of final outcomes.
Check the bust rate, median outcome, and key takeaway to understand the risks.
The Martingale system is seductive because it seems logical: if you keep doubling, you'll eventually win and recover everything plus your initial profit. But mathematics tells a different story.
Exponential stake growth vs. linear expected gain: Each win nets you only your base stake (e.g., £10), regardless of how much you've risked. But the required stake grows exponentially: £10, £20, £40, £80, £160... After just 10 losses, you need over £5,000 to chase a £10 profit.
The probability trap: At even-money odds (2.0), the probability of losing 7 times in a row is (0.5)^7 = 0.78%. That sounds tiny — but over 500 bets, the probability of experiencing at least one 7-loss streak exceeds 95%. It's not a question of if, but when.
Finite bankrolls: The system only works with infinite money and no table limits. In reality, every bankroll has a ceiling. When you hit it, you absorb a catastrophic loss that wipes out hundreds of small wins.
Expected value is unchanged: The Martingale system doesn't change the house edge. If the bookmaker has a 5% margin, you lose 5% on average no matter what staking plan you use. The system just redistributes outcomes: many small wins and rare devastating losses.
See Also: Compare Martingale against four other strategies in our Staking Strategy Comparison tool. For a mathematically sound alternative, try the Kelly Criterion Calculator.
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