The Martingale Betting Strategy: Does Doubling Down After Every Loss Actually Work?

The Martingale betting strategy is one of the oldest and most popular systems used in casino gaming. One big reason for its popularity is its simplicity: you merely double your bet after every loss until you win. The other reason is that the Martingale seems to work. But as I'll discuss, that last statement actually falls apart once you look at the math.

Again, the core of the Martingale betting strategy is simple:

How could such a basic betting system work so well? The following example shows the power of the Martingale:

Despite winning just one out of five wagers, you still end up with a dollar profit. You could theoretically only win like 20–40% of the rounds and still come out on top.

In actuality, you'll win closer to half your wagers by focusing the Martingale on casino games with best odds situations. For example, European roulette even-money bets win 48.65% of the time. This gives you the dual effect of making high-percentage wagers and eventually recovering losses.

The Martingale strategy often does work in the short run, but it eventually unravels due to three reasons:

You normally won't lose more than a few even-money bets in a row. However, you'll eventually suffer long dry spells if you keep playing long enough. 

Even if there were no table limits, you'd run out of money at some point after doubling bets long enough. The table limits will probably ruin your Martingale efforts before that happens. The following scenario explains this issue:

You're at an online blackjack table with $1–$1,000 betting limits:

You're guaranteed at least a $23 loss even if you increase the next wager to $1k and win. Another losing round would bring the total losses up to $2,023. That leaves a big hole with no way to effectively use the Martingale strategy.

I'm even being generous here by using common $1 online table minimums. Things get worse in land-based or live-dealer casinos, where most minimums range from $5 to $25.

Now, you might say that a 10- or 11-round losing streak doesn't happen often. But consider that the probability of losing 10 consecutive blackjack hands within a given 10-hand window is 0.065%. The math works out to losing 10 straight roughly once every 1,500 hands or spins. 

This system—like all betting systems—can only work in the short term. The Martingale isn't a magic bullet for overcoming the house edge, even when you're dealing with reasonable baccarat or roulette odds.

Legal U.S. online casinos in PA, MI, WV, and NJ offer tools to help gamblers play responsibly, such as limits on deposits, wagering, sessions, and time. They also provide timeouts and self-exclusion for players who need to take short- or long-term breaks from their accounts.

Bettors must be 21 years or older and otherwise eligible to register and place wagers at online casinos. If you or someone you know has a gambling problem, please seek assistance from trained professionals such as the Problem Gambling Help Network at 1-800-MY-RESET.

We've established that this system doesn't pan out in the long run. But you may wonder if specific games determine how effective the Martingale strategy casino approach can be.

Let's start by considering how it works on online roulette real money tables. The European wheel features a 2.7% house edge and 48.65% probability of winning even-money wagers. 

That solid win probability makes roulette a decent candidate for using the Martingale, which relies on avoiding long losing streaks. However, the 2.7% house advantage isn't ideal compared to blackjack and baccarat.

Moving along, blackjack odds are the best for long-term play, with the average online game carrying a tiny 0.5% house edge. But blackjack also has the lowest win probability since you only win around 43% of hands on average. That doesn't bode well for the Martingale.

Baccarat has the best of both worlds, with a 1.06% house edge and 50.68% win probability on banker bets. The downside is that the 5% commissions taken from banker wins make for awkward Martingale tracking—you're essentially being paid 0.95:1 instead of 1:1. Nevertheless, I give baccarat a slight advantage for this betting strategy's purposes.

Systems like the Martingale can provide a short-term rush, especially when the winnings pile up early on. But if your goal is longevity and smarter play, then I suggest two alternative strategies:

Neither approach is as exciting as using the Martingale. However, these are safer alternatives that make losing streaks much less stressful. You'll also have plenty of lucky days where you still win when using them.

If you're still interested in experimenting with the Martingale or another system (e.g., Labouchere), you'll want to consider legal casino apps that have low minimum bets and solid bonuses. The following chart shows four of my favorite regulated US online casinos for betting system purposes.

Jeremy Olson