What Is Basic Strategy?
Blackjack is unique among casino card games because your decisions directly affect the outcome. Basic strategy is a set of mathematically derived rules that tells you the statistically optimal action — Hit, Stand, Double Down, Split, or Surrender — for every possible hand combination against every possible dealer upcard.
Playing perfect basic strategy can reduce the house edge to under 0.5% in standard blackjack games, making it one of the most player-favourable games in any casino.
The Core Principles
Before memorising specific charts, understand the three foundational ideas behind basic strategy:
- The dealer must hit until reaching 17. This gives you information to work with.
- You should assume the dealer's hidden card is a 10. Since 10-value cards are the most common, this is a reasonable default assumption.
- Your goal is to maximise value over many hands, not just win the current one.
Hard Hands: Key Decision Points
| Your Hand Total | 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); else Hit |
| 12–16 | Stand | Hit |
| 17–21 | Stand | Stand |
Soft Hands: Don't Be Afraid to Double
A soft hand contains an Ace counted as 11. Because an Ace can revert to 1, you cannot bust on a one-card draw — which changes your optimal strategy significantly.
- Soft 13–14 (A-2, A-3): Double against dealer 5 or 6; otherwise Hit.
- Soft 15–16 (A-4, A-5): Double against dealer 4–6; otherwise Hit.
- Soft 17 (A-6): Double against dealer 3–6; otherwise Hit.
- Soft 18 (A-7): Double against dealer 3–6; Stand against 2, 7, 8; Hit against 9, 10, Ace.
- Soft 19–21: Always Stand.
Pairs: When to Split
Splitting pairs correctly is one of the most value-adding skills in blackjack:
- Always split: Aces and 8s.
- Never split: 10s and 5s.
- Split 9s against dealer 2–9, except 7; Stand against 7, 10, Ace.
- Split 7s against dealer 2–7; otherwise Hit.
- Split 6s against dealer 2–6; otherwise Hit.
- Split 2s and 3s against dealer 2–7; otherwise Hit.
The Surrender Option
If the game offers late surrender (surrendering after the dealer checks for blackjack), take advantage of it on:
- Hard 16 against dealer 9, 10, or Ace.
- Hard 15 against dealer 10.
Surrendering returns half your bet and is the correct long-term play in these situations.
Tips for Learning Basic Strategy
- Print or bookmark a strategy chart and refer to it while playing online — most platforms allow this.
- Practice with free-play versions of blackjack to build muscle memory.
- Focus on the highest-impact decisions first: never take insurance, always split Aces and 8s.
- Be consistent — deviating from strategy based on hunches erases its mathematical benefit.
Basic strategy won't guarantee winning every session, but it is the single most effective tool available to any blackjack player. Master it and you're already ahead of the majority of the table.