Pop culture has created a massive myth around the practice of counting cards at the blackjack table.

The reality of this famous blackjack strategy is far less glamorous and requires intense, grueling mental discipline.

Is Card Counting Actually Illegal?

You cannot be criminally charged simply for being good at math and paying attention to the game.

However, while it isn’t illegal, casinos are private businesses and they strongly detest advantage players.

• Using a physical device or a smartphone app to count cards is strictly illegal and will lead to arrest
• Casinos share databases of known counters, meaning getting banned at one property might get you banned everywhere
• Security teams use advanced software to analyze betting patterns to catch suspected counters

Understanding How Counters Keep Track

Rather than memorizing the deck, players assign a +1, 0, or -1 value to cards as they leave the shoe.

A deck full of tens and Aces favors the player, so counters increase their bets when the count is high.

Ultimately, a perfect card counter only has about a 1% to 1.5% mathematical advantage over the house.