The Hi-Lo Card Counting System
The most popular counting system — simple enough to learn in an afternoon, powerful enough to give you a real edge.
Step 1: Learn the Card Values
Hi-Lo assigns every card one of three values. You don't need to memorize individual cards — just learn which group each card belongs to:
When low cards (2-6) leave the deck, the remaining cards have a higher concentration of 10s and aces. This is good because: you get more blackjacks (paying 3:2), your doubles land on better totals, and the dealer busts more often on stiff hands. So seeing a low card leave is good news — +1.
When high cards (10-A) leave, the opposite happens. The deck gets worse for you — fewer blackjacks, weaker doubles, dealer busts less. Bad news — -1.
Cards 7-9 don't significantly change the math either way, so they're 0.
Step 2: Keep the Running Count
The running count starts at 0 when the shoe is shuffled. As each card is dealt face-up, you add its Hi-Lo value to your running total. That's it — just add 1, subtract 1, or skip.
| Card | K | 5 | 3 | 10 | 7 | 2 | A | 6 |
| Value | -1 | +1 | +1 | -1 | 0 | +1 | -1 | +1 |
| Running | -1 | 0 | +1 | 0 | 0 | +1 | 0 | +1 |
Watch it happen in real time:
Step 3: Convert to True Count
The running count alone doesn't tell the full story. A running count of +6 with 6 decks remaining means each deck only has about 1 extra high card — barely noticeable. But +6 with 2 decks remaining means each deck has 3 extra high cards — a significant advantage.
Look at the discard tray (where dealt cards pile up). A standard deck is about 2 cm (3/4 inch) thick. If you started with a 6-deck shoe and the discard tray looks about 4 decks deep, roughly 2 decks remain. You don't need to be precise — estimating to the nearest half-deck is fine.
Step 4: Adjust Your Bets
This is where counting pays off. When the true count tells you the deck favors you, bet more. When it favors the house, bet less. This is called a bet spread.
A player who suddenly jumps from $25 to $200 bets looks suspicious. Casinos train dealers and pit bosses to spot big bet spreads. Some counters use a 1-4 spread instead of 1-8 to fly under the radar — less profit per hour, but longer playing time before getting backed off.
Strategy Deviations Based on Count
Basic strategy assumes a neutral deck. When the count is high or low, a few plays change. The most important deviation:
Basic strategy says never take insurance. But at true count +3 or higher, the deck has enough 10s that insurance becomes a profitable bet. This is the single most important deviation to learn.
Basic strategy says surrender (or hit if no surrender). But at a neutral-to-positive count, standing becomes correct because more 10s remain to bust the dealer.
Basic strategy says hit 12 vs 3. But at TC +2 or higher, the extra 10s make it more likely you'll bust. Stand and let the dealer take the risk.
There are about 18 “Illustrious 18” deviations total. Insurance at TC +3 accounts for roughly a third of the value. Master that one first.
How to Practice Hi-Lo
- 1Card value recognition — flip through a deck and say +1, 0, or -1 for each card. Goal: instant recognition, no thinking required.
- 2Slow counting — use TrueCount's beginner counting drill. Cards flash slowly. Focus on accuracy, not speed. Aim for 80%+ exact counts.
- 3Speed counting — move to Standard and Fast drills. A real casino deals about one card per second. You need to count at that speed without losing focus.
- 4Pair cancellation — learn to cancel pairs instantly. See a 5 and a King together? They cancel to 0. This is the speed trick that makes real-table counting possible.
- 5Full simulation — play TrueCount's Blackjack Simulator with counting active. Make strategy decisions AND maintain the count. Adjust bets based on TC. This is the real thing.
Ready to practice Hi-Lo?
Start with slow drills and build up to casino speed. TrueCount checks your count accuracy at random intervals so you know exactly where you stand.