What Is Basic Strategy?
Blackjack basic strategy is a mathematically calculated set of decisions — when to hit, stand, double down, split, or surrender — based on your hand total and the dealer's visible card. When followed consistently, basic strategy reduces the house edge to roughly 0.5% or less, depending on the specific rules of the game being played.
It doesn't guarantee wins; it simply ensures you are always making the statistically optimal decision with the information available.
Core Principles to Understand First
- The dealer must hit on 16 and stand on 17 — This rule is fundamental to all strategy decisions.
- You only see one dealer card — Strategy accounts for all possible hidden cards.
- Card values: Number cards = face value, face cards (J/Q/K) = 10, Ace = 1 or 11.
The Essential Decision Framework
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 (else Hit) | Hit |
| 10–11 | Double (else Hit) | Double if your total beats dealer upcard |
| 12–16 | Stand | Hit |
| 17+ | Stand | Stand |
Soft Hands (Ace Counted as 11)
Soft hands give you flexibility because the Ace can revert to 1 if you bust. Key rules:
- Soft 13–15 (A-2 to A-4): Double against dealer 4–6, otherwise Hit.
- Soft 16–17 (A-5, A-6): Double against dealer 3–6, otherwise Hit.
- Soft 18 (A-7): Double against 3–6, Stand against 7–8, Hit against 9–Ace.
- Soft 19–21: Always Stand.
Pairs — When to Split
- Always split: Aces and 8s
- Never split: 10s, 5s, 4s
- Split 2s, 3s, 7s against dealer 2–7
- Split 6s against dealer 2–6
- Split 9s against dealer 2–6 and 8–9 (not 7, 10, or Ace)
Why People Deviate — and Why You Shouldn't
Many players ignore basic strategy because of gut feelings ("I always bust when I hit 16") or superstition. These feelings are reinforced by memory bias — you remember the times the strategy "failed" more vividly than the times it worked. Over hundreds of hands, correct strategy outperforms intuition every time.
Rule Variations That Affect Strategy
Not all blackjack games are equal. These rule differences change the house edge:
- Blackjack pays 3:2 vs 6:5 — Always favour 3:2 tables; 6:5 dramatically increases the house edge.
- Dealer hits soft 17 — Slightly worse for the player; adjust doubling accordingly.
- Number of decks — Fewer decks is generally better for players.
- Surrender option — When available, surrendering a hard 16 against a dealer 9, 10, or Ace is correct.
Practising Basic Strategy
- Print or bookmark a basic strategy chart for the specific ruleset you're playing.
- Use free-play (demo) blackjack games to practise without financial risk.
- Focus on the hands you find most confusing — soft totals and pairs cause the most errors.
- Graduate to real-money play only once decisions feel automatic.
Basic strategy is the foundation of all advanced blackjack play. Master it first — everything else builds on top of it.