There are many betting strategies available to casino players and sports betting fans.

However, they all carry different risk elements and require differing levels of skill.

One popular strategy, especially for roulette players, is the Paroli system.

This short guide to Paroli will outline how the system works and explain the key advantages and disadvantages of using it.

Origins of the Paroli system

The Paroli system is widely believed to be the brainchild of the 16th-century French mathematician and roulette wheel inventor, Blaire Pascal.

The word Paroli derives from the Latin word ‘par’, which means ‘one who is equal to’.

How does the Paroli system work?

The Paroli system has many similarities with other popular casino betting strategies such as the Martingale and the D’Alembert.

Paroli strategy explained
Paroli strategy explained

However, it does have a few key differences that will become apparent when we go through a step-by-step guide on how to use it.

1. Choose your base unit

Your base unit should be between 2% and 5% of your bankroll. If you are a very low-risk player try to keep it around the 2% mark. Your initial bet needs to be at this base unit amount.

2. Double your bet if you win

If you land a winning bet with your first wager, your second bet needs to be double your base unit. And if you win another bet, you should once again double your stake.

3. Stop at three consecutive wins

If you manage to land three wins in a row, you should return to your initial stake size of one base unit.

4. Revert to your base unit after a loss

Whenever you place a losing bet, regardless of your stake size, your next bet needs to be placed using your base unit.

Advantages vs disadvantages


Easy to understand

Compared to many other betting strategies, Paroli is very easy to understand. You only ever have to double your stake amount a maximum of three times or use your base unit stake.

Potentially high returns

If you hit three wins in a row using even money bets, you will have achieved a profit of seven times your base stake.


Losing streaks

No matter which betting strategy you use, there is a chance that you will hit a losing streak at some point. If your losing bet comes after two consecutive wins, that losing stake will be four times your base unit.

Relatively high risk

Given the way the stakes change with each bet under the Paroli system, there are a finite number of scenarios that can occur. In over half of these scenarios, you end up making a loss.

What games can it be used on?

The Paroli system is most commonly applied to table games with even money bets such as roulette.

It can also be used for sports betting markets in which there are only two possible outcomes—for example, choosing the winner of a fixture.

Example of the Paroli strategy in sports betting

The New Orleans Saints are playing the Miami Dolphins in an NFL game.

Your base unit is $5, so you place a $5 bet on the Saints scoring the first touchdown. If the Saints score the first touchdown, you should then place a $10 bet on which team will score the next touchdown.

Then, if that second bet also wins, you should place a third touchdown bet of $20.

If the Dolphins score the first touchdown, you should place a $5 bet on which team scores the second touchdown.


Can I use the Paroli system in soccer betting?

Yes. The strategy is a popular one for soccer fans, especially in fixtures involving two closely matched teams. You can use the system to place bets on the outcome of matches, as well as the team that will score the next goal and who will be winning at halftime.

Is the Paroli strategy legal?

Yes. There are no laws or betting legislations that prohibit the use of the Paroli system. In fact, most bookmakers will be happy to see players using the system as it involves increased stakes after winning bets.

How risky is the Paroli strategy?

All betting strategies carry an element of risk, as there is no such thing as a guaranteed bet. The Paroli system aims to reduce risk by suppressing losses. In the long run, this will improve your chances of returning a profit.

Final verdict

If you are looking for an easy-to-implement and simple-to-follow betting strategy, then the Paroli system could be the one for you.

Using it only requires a very basic level of maths knowledge, regardless of the outcome of your bets.

Of course, like all betting systems, there is an element of risk — after all, losing streaks are part and parcel of online gambling.

But overall, this is a solid strategy that can lead to steady profits over time.