What Is Basic Strategy?
Blackjack basic strategy is a set of mathematically optimal decisions for every possible combination of your hand and the dealer's upcard. It was developed through computer simulation, analyzing millions of hands to determine which action — hit, stand, double down, split, or surrender — gives you the best statistical outcome in each situation.
Playing basic strategy consistently doesn't guarantee you'll win every session, but it does reduce the house edge to its lowest possible level — typically around 0.5% or less in standard blackjack variants. Deviating from it consistently increases the house edge.
The Core Decisions in Blackjack
- Hit: Take another card
- Stand: Keep your current hand
- Double Down: Double your initial bet and receive exactly one more card
- Split: When dealt a pair, split them into two separate hands (each with its own bet)
- Surrender: Forfeit half your bet and end the hand (where available)
Hard Hands: When You Have No Ace (or Ace Counted as 1)
| Your Hand Total | Dealer Upcard 2–6 | Dealer Upcard 7–Ace |
|---|---|---|
| 8 or less | Hit | Hit |
| 9 | Double Down | Hit |
| 10 | Double Down | Double (except vs. 10 or Ace — Hit) |
| 11 | Double Down | Double Down |
| 12 | Stand (vs. 4–6); Hit vs. 2–3 | Hit |
| 13–16 | Stand | Hit |
| 17+ | Stand | Stand |
Soft Hands: When Your Ace Counts as 11
A "soft" hand contains an ace counted as 11 — it can't bust on the next card, which opens up more aggressive options.
| Your Soft 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, Ace |
| Soft 19–20 (A+8, A+9) | Always Stand |
Pairs: When to Split
- Always split: Aces and 8s
- Never split: 10s (and face cards), 5s
- Split 9s: Against dealer 2–9 (except 7); Stand against 7, 10, Ace
- Split 7s: Against dealer 2–7; Hit otherwise
- Split 2s and 3s: Against dealer 4–7; Hit otherwise
- Split 4s: Only against dealer 5–6 (in double-after-split games)
- Split 6s: Against dealer 3–6; Hit otherwise
Why You Should Always Split Aces and 8s
Splitting Aces gives you two chances to hit 21 from a strong starting position. Splitting 8s turns a terrible hard 16 — the worst hand in blackjack — into two fresh starts each beginning at 8. Both moves are mathematically correct regardless of the dealer's upcard.
Common Mistakes to Avoid
- Never take insurance: The insurance side bet has a significant house edge and is not recommended under basic strategy.
- Don't stand on soft 18 vs. a dealer 9, 10, or Ace: Many players feel comfortable with 18, but the math favors hitting.
- Don't split 10s: A hard 20 is one of the strongest hands in the game. Don't break it up.
- Avoid making decisions based on gut feeling: Basic strategy has been statistically derived — emotional decisions override its mathematical advantage.
Getting Started
The best way to learn basic strategy is to print a strategy chart (freely available online) and use it openly while playing — most casinos and online platforms permit this. Practice in demo mode until the decisions become second nature. Over time, you'll find you're making the correct play without needing to consult the chart at all.
Basic strategy won't make you a guaranteed winner, but it ensures you're always playing the statistically best possible hand — and that's the smartest way to approach the game.