What Is Basic Strategy?
Blackjack is one of the few casino games where your decisions directly affect the outcome. Basic strategy is a mathematically derived set of rules that tells you the statistically optimal play for every possible hand combination against every possible dealer upcard. When followed correctly, it reduces the house edge to as low as 0.5%.
The Core Decisions
Every blackjack hand requires you to make one or more of the following decisions:
- Hit — Take another card
- Stand — Keep your current hand
- Double Down — Double your bet and take exactly one more card
- Split — Divide a pair into two separate hands
- Surrender — Forfeit half your bet (where available)
Essential Basic Strategy Rules
Hard Hands (No Ace, or Ace Counted as 1)
| Your Hand | Dealer Shows 2–6 | Dealer Shows 7–Ace |
|---|---|---|
| 8 or less | Hit | Hit |
| 9 | Double Down | Hit |
| 10–11 | Double Down | Double (if total beats dealer upcard) |
| 12–16 | Stand | Hit |
| 17+ | Stand | Stand |
Soft Hands (Ace Counted as 11)
- Soft 13–15: Hit against all dealer cards except double down vs. 5 or 6
- Soft 16–18: Double down against dealer 2–6, otherwise hit
- Soft 19–21: Always stand
Pairs to Always Split
- Aces: Always split — each Ace gives you a strong starting position
- Eights: Always split — a hard 16 is one of the worst hands; splitting gives you two chances from 8
Pairs to Never Split
- Tens: Never split — a 20 is too strong to break up
- Fives: Never split — treat as a 10, which is ideal for doubling
Why Basic Strategy Works
Every rule in basic strategy is derived from computer simulations of millions of hands. It accounts for the probability that the dealer will bust, the likelihood of improving your hand, and the expected value of each decision. It does not guarantee you'll win every hand — it guarantees you make the most mathematically sound decision every time.
Common Mistakes to Avoid
- Standing on 16 vs. a dealer 10 — The correct play is to hit (or surrender if available)
- Not doubling on 11 — This is one of the highest expected-value plays in the game
- Splitting tens — Emotion-driven, statistically poor decision
- Taking insurance — This is a side bet with a high house edge and should almost always be declined
Getting Started with Basic Strategy
Print a basic strategy chart and keep it handy while you play — most online casinos permit this. With consistent application, you give yourself the best mathematical chance of winning at blackjack every session.