What Is Blackjack Basic Strategy?
Basic strategy is a set of mathematically optimised decisions for every possible hand combination in blackjack. It was developed through extensive statistical analysis and tells you the best action — Hit, Stand, Double Down, or Split — based on your hand total and the dealer's visible card.
Following basic strategy does not guarantee you will win every hand, but over time it significantly reduces the house edge compared to playing by intuition or guesswork.
The Core Decisions in Blackjack
- Hit — Take another card.
- Stand — Keep your current hand and end your turn.
- Double Down — Double your initial bet and receive exactly one more card.
- Split — When dealt two cards of the same value, split them into two separate hands, each with its own bet.
- Surrender — Forfeit half your bet and end the hand (available on some platforms).
Key Basic Strategy Rules
Hard Hands (No Ace, or Ace Counted as 1)
| 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 (or Hit if dealer has Ace) |
| 12–16 | Stand | Hit |
| 17 or more | Stand | Stand |
Soft Hands (Ace Counted as 11)
- Soft 13–15 (A+2 to A+4): Hit in most situations; Double Down if dealer shows 4, 5, or 6.
- Soft 16–17 (A+5, A+6): Double Down when dealer shows 3–6; otherwise Hit.
- Soft 18 (A+7): Stand against dealer 2, 7, or 8; Double Down against 3–6; Hit against 9, 10, or Ace.
- Soft 19–21: Always Stand.
Pairs
- Always Split: Aces and 8s.
- Never Split: 10s and 5s.
- Split against weak dealer cards (2–6): 2s, 3s, 4s, 6s, 7s, 9s.
Why You Should Never Take Insurance
When the dealer shows an Ace, most blackjack games offer an "insurance" side bet. Basic strategy universally advises declining insurance. The insurance bet has a high house edge and does not improve your long-term results, regardless of what hand you hold.
How to Practice Basic Strategy
The best way to internalise basic strategy is through repetition:
- Print or save a basic strategy chart specific to the variant you play (single-deck, multi-deck, etc.).
- Play free demo blackjack online with the chart beside you.
- Quiz yourself on common hand scenarios until the decisions become automatic.
- Gradually reduce reliance on the chart as your confidence grows.
Limitations of Basic Strategy
Basic strategy is optimised for standard blackjack rules. Rule variations — such as whether the dealer hits or stands on soft 17, whether doubling after splitting is allowed, and how many decks are in play — can slightly alter the optimal decisions. Always check the specific rules of the blackjack variant you are playing and look for a matching strategy chart.
Mastering basic strategy is one of the most practical investments a blackjack player can make. It costs nothing to learn and pays dividends in every session.