What Is Blackjack Basic Strategy?
Blackjack is unique among casino games because your decisions directly affect the outcome. Unlike slots or roulette, how you play each hand matters — and there's a provably optimal way to play every possible hand combination.
Basic strategy is a set of rules, derived through mathematical analysis, that tells you exactly when to hit, stand, double down, split, or surrender based on your hand total and the dealer's upcard. Following it consistently reduces the house edge to roughly 0.5% — the lowest of any casino game available to the average player.
Core Decisions in Blackjack
- 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 the same value, split them into two separate hands.
- Surrender: Forfeit half your bet and end the hand (not always available).
Key Basic Strategy Rules to Know
Hard Totals (No Ace, or Ace Counted as 1)
- Hard 8 or less: Always hit.
- Hard 9: Double if dealer shows 3–6; otherwise hit.
- Hard 10 or 11: Double down if your total exceeds the dealer's upcard; otherwise hit.
- Hard 12–16: Stand if dealer shows 2–6 (dealer likely to bust); hit if dealer shows 7 or higher.
- Hard 17+: Always stand.
Soft Totals (Hand Contains an Ace Counted as 11)
- Soft 13–15: Double if dealer shows 4–6; otherwise hit.
- Soft 16–18: Double if dealer shows 3–6; otherwise hit (stand on soft 18 if dealer shows 2, 7, or 8).
- Soft 19+: Always stand.
Pairs (Splitting Rules)
- Always split: Aces and 8s.
- Never split: 10s (or face cards) and 5s.
- Split 9s against dealer 2–6 and 8–9; stand against 7, 10, or Ace.
- Split 2s and 3s against dealer 4–7.
- Split 7s against dealer 2–7.
- Split 6s against dealer 3–6.
Why Splitting Aces and 8s Is Non-Negotiable
Splitting Aces gives you two chances to hit 21 from a powerful starting position. Splitting 8s removes you from one of the worst hands in the game (hard 16) and gives you two fresh starts against a manageable upcard. Even when it feels risky, the mathematics overwhelmingly support these splits.
What Basic Strategy Does NOT Do
It's important to understand what basic strategy is — and isn't:
- It does not guarantee you win every hand.
- It does not overcome the house edge entirely — it minimises it.
- It does not account for card counting (a more advanced technique).
- It is not a system for managing bets — combine it with sound bankroll management.
Variations by Ruleset
Basic strategy varies slightly depending on the specific rules in play. The key factors that influence strategy are:
- Number of decks (single deck vs. multi-deck)
- Whether the dealer hits or stands on soft 17
- Whether doubling after splits is allowed
- Whether surrender is available
Most online and land-based casinos use a 6- or 8-deck shoe where the dealer hits soft 17. Look up a strategy chart that matches the exact rules of the game you're playing for the best results.
Getting Started
Print or bookmark a basic strategy chart and refer to it as you play — it's perfectly legal in casinos. With practice, the most common decisions become second nature. Combine basic strategy with proper bankroll management and you'll play one of the most player-friendly games the casino offers.