What Is Basic Strategy?

Blackjack basic strategy is a mathematically calculated set of decisions that tells you the optimal action for every possible hand combination against every possible dealer upcard. It doesn't guarantee wins — no strategy can — but it minimises the house edge to its lowest possible level, typically under 0.5% when applied correctly.

Why Basic Strategy Matters

Without a strategy, a typical player makes decisions based on gut feeling or superstition, which can push the house edge to 2%–4% or higher. Basic strategy, by contrast, is derived from probability mathematics and millions of simulated hands. Using it consistently is simply the smartest way to play.

Core Basic Strategy Rules

Hard Hands (No Ace, or Ace counted as 1)

  • Hard 8 or less: Always Hit.
  • Hard 9: Double Down if dealer shows 3–6, otherwise Hit.
  • Hard 10–11: Double Down against most dealer cards (especially 2–9); Hit against 10 or Ace.
  • Hard 12–16: Stand if dealer shows 2–6 (dealer bust territory); Hit if dealer shows 7 or higher.
  • Hard 17+: Always Stand.

Soft Hands (Ace counted as 11)

  • Soft 13–14 (A-2, A-3): Double Down vs. dealer 5–6; otherwise Hit.
  • Soft 15–16 (A-4, A-5): Double Down vs. dealer 4–6; otherwise Hit.
  • Soft 17 (A-6): Double Down vs. dealer 3–6; otherwise Hit.
  • Soft 18 (A-7): Double Down vs. dealer 3–6; Stand vs. 2, 7, 8; Hit vs. 9, 10, Ace.
  • 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); Stand against 7, 10, Ace.
  • Split 7s: Against dealer 2–7.
  • Split 6s: Against dealer 2–6.
  • Split 2s and 3s: Against dealer 4–7.
  • Split 4s: Only against dealer 5–6 (in games that allow doubling after split).

The "Dealer Bust Zone"

One of the most important concepts in basic strategy is recognising when the dealer is in a weak position. When the dealer's upcard is 2 through 6, they have a higher probability of busting. In these situations, you should be more conservative — Stand on your stiff hands (12–16) and take advantage by Doubling Down more aggressively.

Insurance Bets: Avoid Them

When the dealer shows an Ace, you'll be offered an "insurance" side bet. Basic strategy is clear: never take insurance. It carries a house edge of around 7%, making it one of the worst bets at the table for the player.

Printing and Using a Strategy Card

Basic strategy charts are legal to use at most casinos (online casinos especially — no one is watching). You can find printable versions online and reference them while you play. The more you practice, the more the decisions will become second nature.

Limitations of Basic Strategy

Basic strategy assumes a standard 6- or 8-deck game with typical casino rules. Some rule variations — like whether the dealer hits soft 17, or whether late surrender is allowed — slightly alter the optimal decisions. Always find a strategy chart tailored to the specific rules of the game you're playing.

Mastering basic strategy is the single best investment a blackjack player can make. It costs nothing, takes an afternoon to learn, and permanently lowers the house's advantage.