What Is Basic Strategy in Blackjack?
Blackjack is unique among casino card games because your decisions directly affect the outcome. Basic strategy is a mathematically derived set of rules that tells you the statistically optimal move for every possible hand combination against every dealer upcard. Playing perfect basic strategy significantly reduces the house edge — in some rule sets, to below 0.5%.
Why Basic Strategy Works
Basic strategy was developed through computer simulations running millions of hands. For any given player hand vs. dealer upcard combination, all possible outcomes were calculated and averaged. The result is a chart that tells you whether to Hit, Stand, Double Down, Split, or Surrender for maximum expected value.
The Core Rules at a Glance
Hard Hands (No Ace, or Ace Counted as 1)
| Your Hand | Recommended Action |
|---|---|
| 8 or less | Always Hit |
| 9 | Double vs dealer 3–6, otherwise Hit |
| 10 | Double vs dealer 2–9, otherwise Hit |
| 11 | Double vs dealer 2–10, Hit vs Ace |
| 12 | Stand vs dealer 4–6, otherwise Hit |
| 13–16 | Stand vs dealer 2–6, otherwise Hit |
| 17 or more | Always Stand |
Soft Hands (Ace Counted as 11)
| Your Hand | Recommended Action |
|---|---|
| Soft 13–14 (A+2, A+3) | Double vs dealer 5–6, otherwise Hit |
| Soft 15–16 (A+4, A+5) | Double vs dealer 4–6, otherwise Hit |
| Soft 17 (A+6) | Double vs dealer 3–6, otherwise Hit |
| Soft 18 (A+7) | Double vs dealer 3–6, Stand vs 2/7/8, Hit vs 9/10/A |
| Soft 19–20 | Always Stand |
Pairs (Splitting Rules)
- Always split: Aces and 8s
- Never split: 10s and 5s
- Split 9s against dealer 2–9, except 7
- Split 7s against dealer 2–7
- Split 2s and 3s against dealer 2–7
- Split 6s against dealer 2–6
When to Use Surrender
If the game offers late surrender (surrendering after the dealer checks for blackjack), use it on:
- Hard 16 against dealer 9, 10, or Ace
- Hard 15 against dealer 10
Surrendering gives back half your bet and is the optimal play in these high-risk situations.
How Rule Variations Affect Strategy
Basic strategy charts can differ slightly based on the specific rules of the table you're playing:
- Number of decks: Single-deck games slightly favor the player
- Dealer hits/stands on soft 17: Dealer hitting soft 17 increases house edge slightly
- Double after split allowed: This rule benefits players
- Resplitting aces: Beneficial if allowed
Memorizing the Chart
Learning basic strategy takes practice. A few tips to memorize it faster:
- Start with the most common situations (hard 12–16 vs dealer upcards)
- Use a printed strategy card while playing — it's allowed at most casinos
- Practice with free online blackjack trainers that flag incorrect decisions
- Break the chart into sections: hard totals, soft totals, pairs
The Bottom Line
Basic strategy won't guarantee wins — no system can in a game with house edge — but it gives you the best possible statistical footing. Combine it with good bankroll discipline, and you'll play blackjack at its most efficient.