Card counting is real mathematics and a genuinely winning method in the right conditions. Those conditions barely exist online, and that is worth understanding before you invest time in it.
How it works
In the Hi-Lo system, low cards (2-6) count +1, high cards (10-A) count โ1, sevens through nines count zero. A positive running count means the remaining shoe is rich in tens and aces, which favours the player. Divide by the decks remaining for the ยซย true countย ยป and raise your bet as it climbs.
The realistic edge
Perfect counting yields roughly 0.5% to 1.5% over the house. That is real but small: it requires a substantial bankroll, disciplined bet spreading and many hours to express itself. It is not a fast route to anything.
Why online is different
Standard online blackjack reshuffles after every hand, which erases the count before it can form. Live dealer tables use real cards but typically cut a large portion of the shoe and shuffle early, leaving too little penetration to count against.
What to do instead online
Play basic strategy perfectly, choose tables paying 3:2 on a natural, and put your effort into the terms rather than the shoe โ pricing a bonus correctly moves your expected return far more than counting ever will in an online context.
Frequently asked questions
Can you count cards online?
Not effectively. Standard online blackjack reshuffles every hand, and live tables cut the shoe too early for the count to matter.
How big is the edge from counting?
Roughly 0.5% to 1.5% under ideal conditions, requiring a large bankroll and long hours to realise.
