What Is Blackjack Basic Strategy?
Blackjack is unique among casino table games because your decisions directly influence the outcome of each hand. Basic strategy is a mathematically derived set of guidelines that tells you the statistically optimal play for every possible hand combination — your cards versus the dealer's upcard.
Playing perfect basic strategy can reduce the house edge to less than 1%, making blackjack one of the most player-friendly games in the casino when played correctly.
The Goal of Blackjack
Before diving into strategy, let's be clear on the objective: beat the dealer's hand without exceeding 21. You're not competing against other players — only the dealer. Cards 2–10 are worth face value; face cards (Jack, Queen, King) are worth 10; Aces are worth 1 or 11.
Your Four Main Decisions
- Hit: Take another card
- Stand: Keep your current hand
- Double Down: Double your bet and receive exactly one more card
- Split: If you have two cards of equal value, split them into two separate hands
Core Basic Strategy Rules
Hard Totals (No Ace, or Ace Counted as 1)
| Your Hand | Dealer Shows | Action |
|---|---|---|
| 8 or less | Any | Always Hit |
| 9 | 3–6 | Double Down |
| 9 | 2, 7–Ace | Hit |
| 10 or 11 | 2–9 | Double Down |
| 12 | 4–6 | Stand |
| 12 | 2, 3, 7–Ace | Hit |
| 13–16 | 2–6 | Stand |
| 13–16 | 7–Ace | Hit |
| 17–21 | Any | Always Stand |
Soft Totals (Hand Contains an Ace Counted as 11)
- Soft 13–15 (A-2 through A-4): Double if dealer shows 4–6, otherwise Hit
- Soft 16–17 (A-5, A-6): Double if dealer shows 3–6, otherwise Hit
- Soft 18 (A-7): Double if dealer shows 3–6; Stand vs. 2, 7, 8; Hit vs. 9, 10, Ace
- Soft 19–21: Always Stand
Pairs — When to Split
- Always split: Aces and 8s
- Never split: 5s (treat as 10, double down) or 10s (you have 20 — stand)
- Split 2s, 3s, 7s: When dealer shows 2–7
- Split 6s: When dealer shows 2–6
- Split 9s: When dealer shows 2–6 and 8–9; stand vs. 7, 10, Ace
Why the Dealer's Upcard Matters So Much
The dealer's visible card is your most important piece of information. Dealers must follow strict rules — typically hitting until they reach 17 or more. When the dealer shows a bust card (4, 5, or 6), they are statistically likely to go over 21, so you should be more conservative and let them bust. When the dealer shows a strong card (7 through Ace), you need to be more aggressive and draw toward a stronger hand.
Common Beginner Mistakes to Avoid
- Never take Insurance — it's a side bet with a high house edge
- Don't split 10s — a hand of 20 is already very strong
- Don't stand on soft 18 against a dealer 9, 10, or Ace
- Don't be afraid to double down — it's one of the most powerful tools available
Basic strategy won't guarantee wins every session, but it gives you the best mathematical foundation for playing blackjack. Print a strategy card and use it freely — most casinos allow it at the table.