Every single game on a casino floor is meticulously designed with a built-in mathematical advantage for the operator.

Understanding this concept is the most important lesson any gambler can ever learn before placing a bet.

The Math Behind the Advantage

The concept is simple: if the true odds are 35-to-1, the casino will only pay you 35-to-1 instead of 36-to-1.

Take European Roulette: there are 37 numbers on the wheel, meaning your true odds of hitting a single number are 1 in 37.

• This slight discrepancy in payouts guarantees that the casino retains a small percentage of all money wagered
• A 2% house edge means the casino expects to keep two dollars out of every one hundred dollars bet
• Over millions of spins, this tiny percentage translates into billions of dollars in guaranteed revenue

Understanding Return to Player (RTP)

When discussing slot machines, the house edge is usually referred to by its inverse metric: Return to Player (RTP).

An RTP of 95% indicates that the machine is programmed to pay back $95 for every $100 wagered over its lifetime.

You cannot defeat the math, but by choosing games with a low edge, you can play much longer for the same price.