What Is Basic Strategy?
Basic strategy is a set of mathematically derived decisions that tell you the optimal play for every possible blackjack hand combination against every possible dealer upcard. It doesn't guarantee wins — no strategy can — but it minimizes the house edge to its lowest possible value, typically around 0.5% in a standard game.
Without basic strategy, the house edge in blackjack can climb to 2%–4% due to poor decision-making. Basic strategy closes that gap dramatically.
The Core Decision Categories
When to Hit or Stand
The most fundamental decisions in blackjack involve whether to take another card (hit) or keep your current hand (stand).
- Always stand on hard 17 and above.
- Always hit on hard 8 or below.
- On hard 12–16, your decision depends on the dealer's upcard — stand when the dealer shows 2–6 (bust cards), hit when the dealer shows 7 or higher.
When to Double Down
Doubling down lets you double your original bet in exchange for receiving exactly one more card. Use this aggressively when the odds are in your favor:
- Hard 11: Double against any dealer card except an Ace.
- Hard 10: Double against dealer 2–9.
- Hard 9: Double against dealer 3–6.
When to Split Pairs
When dealt a pair, you can split into two separate hands. Key splitting rules:
- Always split Aces and 8s — no exceptions.
- Never split 10s or 5s. A 20 is a strong hand; 5s are better doubled.
- Split 9s against dealer 2–6, 8, and 9.
- Split 7s against dealer 2–7.
Soft Hands (Hands Containing an Ace)
A soft hand contains an Ace counted as 11. These hands are more flexible because you can't bust on a single hit.
- Soft 18 (Ace-7): Stand against dealer 2, 7, 8. Double against 3–6. Hit against 9, 10, Ace.
- Soft 17 (Ace-6): Always double against dealer 3–6; otherwise hit.
- Soft 19–20: Always stand.
Understanding the Dealer's Bust Cards
The dealer showing a 4, 5, or 6 is in the weakest position statistically — these are the most likely cards to result in the dealer busting. When the dealer shows these cards, your strategy shifts toward standing on lower totals and doubling down more aggressively.
Using a Strategy Chart
Basic strategy is best learned using a printed chart that maps every hand combination. Many online gaming platforms allow you to reference a chart during play — and doing so is entirely legitimate. Over time, the decisions become instinctive.
What Basic Strategy Doesn't Do
Basic strategy is not card counting. It doesn't track which cards have been dealt or adjust based on the remaining deck composition. It's a static, optimal response system based on the current state of your hand versus the dealer's upcard. For card counting, you'd need additional techniques beyond basic strategy.
Key Takeaways
- Basic strategy reduces the house edge to approximately 0.5% in most standard blackjack variants.
- Always use a strategy chart until the decisions become second nature.
- Never deviate from basic strategy based on "gut feeling" — the math is on your side when you follow it.
- Always check the specific rules of the variant you're playing, as rule variations (number of decks, dealer hits soft 17, etc.) can affect optimal strategy.