BlackjackStrategy Hub: When to Hit, Stand, Double, or Split

Blackjack is one of the few casino games where a correct application of strategy can meaningfully reduce the house edge. “Basic strategy” is a mathematically derived set of decisions — when to hit, stand, double down, or split — based solely on your two-card hand and the dealer’s upcard. The following guide summarizes the core rules every player should know. It assumes common casino rules (dealer stands on soft 17, double allowed on any two cards, doubling after split allowed). Small rule changes (dealer hits soft 17, number of decks, no double after split) slightly alter optimal plays, but this guide is accurate for most standard tables.

Key concepts

- Hard total: A hand without an ace counted as 11 (or where the ace must count as 1 to avoid busting). Example: 10-7 = hard 17; A-6-10 = hard 17 because ace counts as 1.

- Soft total: A hand that contains an ace counted as 11 without busting. Example: A-6 = soft 17; A-8 = soft 19.

- Pair: Two cards of the same rank (2-2, 8-8, K-K). Splitting separates them into two hands, each with its own wager equal to the original bet.

- Dealer upcard: The dealer’s visible card. Strategy depends heavily on whether the dealer shows a weak card (2–6) or a strong card (7–Ace).

When to Hit or Stand (Hard Totals)

- Hard 17 or more: Always stand. With 17+, the risk of busting on a hit outweighs gains.

- Hard 13–16: Stand when the dealer shows 2–6; hit when the dealer shows 7–Ace. Rationale: Dealer’s higher chance of busting with 2–6 makes you better off standing on these marginal totals.

- Hard 12: Stand if dealer shows 4–6; hit if dealer shows 2,3,7–Ace.

- Hard 11 or less: Hit except when doubling is appropriate (see doubling rules below). With 11 or less you cannot bust on a single card (if 11 or less) so hitting is usually correct unless doubling is preferable.

When to Hit or Stand (Soft Totals)

Soft hands are more flexible because the ace can be worth 1 or 11.

- Soft 19 (A-8) or soft 20 (A-9): Stand. These are strong hands against nearly any dealer upcard.

- Soft 18 (A-7): Stand against dealer 2, 7, 8. Double against dealer 3–6 if allowed; otherwise stand. Hit against dealer 9–Ace.

- Soft 17 (A-6): Double against dealer 3–6; otherwise hit.

- Soft 13–16 (A-2 through A-5): Double against dealer 4–6 (for A-4/A-5 double vs 4–6; for A-2/A-3 double vs 5–6 in some charts); otherwise hit. (Simplified rule: A-2–A-6 generally aim to double vs dealer 4–6, with a few composition-specific nuances.)

Doubling Down

Doubling down lets you double your bet in exchange for committing to stand after receiving exactly one more card. It’s one of the most profitable plays when used correctly.

- Hard 11: Double against dealer 2–10; hit against Ace. This is the most favorable double.

- Hard 10: Double against dealer 2–9; hit against 10–Ace (do not double if dealer shows 10 or Ace).

- Hard 9: Double against dealer 3–6; hit otherwise.

- Soft doubles: As above, double soft 13–18 against dealer's weak upcards to maximize value. Specific common rules:

- A-2, A-3: Double vs dealer 5–6 (or 4–6 depending on chart); otherwise hit.

- A-4, A-5: Double vs dealer 4–6; otherwise hit.

- A-6: Double vs dealer 3–6; otherwise hit.

- A-7: Double vs 3–6 (stand vs 2,7,8; hit vs 9–Ace).

Doubling after splitting: If the casino permits doubling after a split (DAS), you should use the same doubling rules on the new two-card hands. This rule significantly improves split strategy value.

When to Split Pairs

Splitting can convert a marginal hand into two potentially winning hands. Some pairs are almost always split; others never are.

- Always split:

- A-A: Always split. Two hands starting with an Ace are far stronger than one A-A (which is just 12).

- 8-8: Always split. 16 is a poor standalone hand; two 8s give good chances to make 18 or better.

- Never split:

- 10-10 (or any 10-value pair like K-K, Q-Q, J-J): Never split. 20 is an excellent hand.

- 5-5: Never split — treat as a hard 10 and double vs dealer 2–9; otherwise hit.

- Conditional splits:

- 2-2 and 3-3: Split vs dealer 2–7; otherwise hit.

- 4-4: Usually do not split, but split vs dealer 5–6 in some charts (only advisable if doubling after split is allowed); otherwise hit.

- 6-6: Split vs dealer 2–6; hit vs 7–Ace.

- 7-7: Split vs dealer 2–7; hit vs 8–Ace.

- 9-9: Split vs dealer 2–6 and 8–9; stand vs 7, 10, Ace.

These rules maximize expected value across typical dealer upcards. Remember that splitting creates more variance — more hands and more bets — but correct splits increase long-run returns.

Practical Tips and Table Rules

- Insurance: Generally a sucker bet unless you are counting cards. Decline insurance as default.

- Surrender: If the table offers late surrender, use it with hard 16 vs dealer 9–Ace and sometimes with hard 15 vs 10. Surrender reduces losses on extremely unfavorable situations.

- Rule variations: Dealer hits soft 17 (H17), number of decks, limits on doubling or splitting, and whether doubling after split (DAS) is allowed will shift some recommendations slightly. For example, when the dealer hits soft 17, the house edge rises and certain doubles become slightly less favorable; still, the basic pattern above remains useful.

- Bankroll and bet sizing: Basic strategy reduces the house edge but does not eliminate variance. Use conservative bet sizing and a bankroll that can withstand short-term swings.

- Practice: Use a basic strategy chart or trainer app until the plays become automatic. Knowing the right move without pausing at the table prevents poor decisions made under pressure.

- Card counting: Basic strategy is optimal for uncounted play. Card counting modifies decisions in certain counts (e.g., standing on 16 vs dealer 10 in high-count situations), but it requires accurate practice, bankroll and is restricted or policed by casinos.

Examples

- You have 12 (7-5); dealer shows 6. Stand — dealer likely to bust.

- You have 12; dealer shows 3. Hit — dealer’s 3 is not weak enough to force a stand on 12.

- You have A-6 (soft 17); dealer shows 4. Double (if allowed); otherwise hit.

- You have 9-9; dealer shows 7. Stand — splitting against 7 is not favorable.

- You have A-A; always split — draw to each ace gives excellent prospects.

Conclusion

Memorize the key patterns: stand on 17+, hit low totals, stand on 12–16 versus 2–6, double strong doubling opportunities (hard 9–11 and many soft totals), and split aces and eights while never splitting tens or fives. These rules form the backbone of basic strategy and will significantly improve your long-term results at the blackjack table. Practice with a chart or trainer, be mindful of table rules that alter specifics, and play responsibly.

BlackjackStrategy Hub: When to Hit, Stand, Double, or Split Blackjack is one of the few casino games where a correct application of strategy can meaningfully reduce the house edge. “Basic strategy” is a mathematically derived set of decisions — when to hit, stand, double down, or split — based solely on your two-card hand and the dealer’s upcard. The following guide summarizes the core rules every player should know. It assumes common casino rules (dealer stands on soft 17, double allowed on any two cards, doubling after split allowed). Small rule changes (dealer hits soft 17, number of decks, no double after split) slightly alter optimal plays, but this guide is accurate for most standard tables. Key concepts - Hard total: A hand without an ace counted as 11 (or where the ace must count as 1 to avoid busting). Example: 10-7 = hard 17; A-6-10 = hard 17 because ace counts as 1. - Soft total: A hand that contains an ace counted as 11 without busting. Example: A-6 = soft 17; A-8 = soft 19. - Pair: Two cards of the same rank (2-2, 8-8, K-K). Splitting separates them into two hands, each with its own wager equal to the original bet. - Dealer upcard: The dealer’s visible card. Strategy depends heavily on whether the dealer shows a weak card (2–6) or a strong card (7–Ace). When to Hit or Stand (Hard Totals) - Hard 17 or more: Always stand. With 17+, the risk of busting on a hit outweighs gains. - Hard 13–16: Stand when the dealer shows 2–6; hit when the dealer shows 7–Ace. Rationale: Dealer’s higher chance of busting with 2–6 makes you better off standing on these marginal totals. - Hard 12: Stand if dealer shows 4–6; hit if dealer shows 2,3,7–Ace. - Hard 11 or less: Hit except when doubling is appropriate (see doubling rules below). With 11 or less you cannot bust on a single card (if 11 or less) so hitting is usually correct unless doubling is preferable. When to Hit or Stand (Soft Totals) Soft hands are more flexible because the ace can be worth 1 or 11. - Soft 19 (A-8) or soft 20 (A-9): Stand. These are strong hands against nearly any dealer upcard. - Soft 18 (A-7): Stand against dealer 2, 7, 8. Double against dealer 3–6 if allowed; otherwise stand. Hit against dealer 9–Ace. - Soft 17 (A-6): Double against dealer 3–6; otherwise hit. - Soft 13–16 (A-2 through A-5): Double against dealer 4–6 (for A-4/A-5 double vs 4–6; for A-2/A-3 double vs 5–6 in some charts); otherwise hit. (Simplified rule: A-2–A-6 generally aim to double vs dealer 4–6, with a few composition-specific nuances.) Doubling Down Doubling down lets you double your bet in exchange for committing to stand after receiving exactly one more card. It’s one of the most profitable plays when used correctly. - Hard 11: Double against dealer 2–10; hit against Ace. This is the most favorable double. - Hard 10: Double against dealer 2–9; hit against 10–Ace (do not double if dealer shows 10 or Ace). - Hard 9: Double against dealer 3–6; hit otherwise. - Soft doubles: As above, double soft 13–18 against dealer's weak upcards to maximize value. Specific common rules: - A-2, A-3: Double vs dealer 5–6 (or 4–6 depending on chart); otherwise hit. - A-4, A-5: Double vs dealer 4–6; otherwise hit. - A-6: Double vs dealer 3–6; otherwise hit. - A-7: Double vs 3–6 (stand vs 2,7,8; hit vs 9–Ace). Doubling after splitting: If the casino permits doubling after a split (DAS), you should use the same doubling rules on the new two-card hands. This rule significantly improves split strategy value. When to Split Pairs Splitting can convert a marginal hand into two potentially winning hands. Some pairs are almost always split; others never are. - Always split: - A-A: Always split. Two hands starting with an Ace are far stronger than one A-A (which is just 12). - 8-8: Always split. 16 is a poor standalone hand; two 8s give good chances to make 18 or better. - Never split: - 10-10 (or any 10-value pair like K-K, Q-Q, J-J): Never split. 20 is an excellent hand. - 5-5: Never split — treat as a hard 10 and double vs dealer 2–9; otherwise hit. - Conditional splits: - 2-2 and 3-3: Split vs dealer 2–7; otherwise hit. - 4-4: Usually do not split, but split vs dealer 5–6 in some charts (only advisable if doubling after split is allowed); otherwise hit. - 6-6: Split vs dealer 2–6; hit vs 7–Ace. - 7-7: Split vs dealer 2–7; hit vs 8–Ace. - 9-9: Split vs dealer 2–6 and 8–9; stand vs 7, 10, Ace. These rules maximize expected value across typical dealer upcards. Remember that splitting creates more variance — more hands and more bets — but correct splits increase long-run returns. Practical Tips and Table Rules - Insurance: Generally a sucker bet unless you are counting cards. Decline insurance as default. - Surrender: If the table offers late surrender, use it with hard 16 vs dealer 9–Ace and sometimes with hard 15 vs 10. Surrender reduces losses on extremely unfavorable situations. - Rule variations: Dealer hits soft 17 (H17), number of decks, limits on doubling or splitting, and whether doubling after split (DAS) is allowed will shift some recommendations slightly. For example, when the dealer hits soft 17, the house edge rises and certain doubles become slightly less favorable; still, the basic pattern above remains useful. - Bankroll and bet sizing: Basic strategy reduces the house edge but does not eliminate variance. Use conservative bet sizing and a bankroll that can withstand short-term swings. - Practice: Use a basic strategy chart or trainer app until the plays become automatic. Knowing the right move without pausing at the table prevents poor decisions made under pressure. - Card counting: Basic strategy is optimal for uncounted play. Card counting modifies decisions in certain counts (e.g., standing on 16 vs dealer 10 in high-count situations), but it requires accurate practice, bankroll and is restricted or policed by casinos. Examples - You have 12 (7-5); dealer shows 6. Stand — dealer likely to bust. - You have 12; dealer shows 3. Hit — dealer’s 3 is not weak enough to force a stand on 12. - You have A-6 (soft 17); dealer shows 4. Double (if allowed); otherwise hit. - You have 9-9; dealer shows 7. Stand — splitting against 7 is not favorable. - You have A-A; always split — draw to each ace gives excellent prospects. Conclusion Memorize the key patterns: stand on 17+, hit low totals, stand on 12–16 versus 2–6, double strong doubling opportunities (hard 9–11 and many soft totals), and split aces and eights while never splitting tens or fives. These rules form the backbone of basic strategy and will significantly improve your long-term results at the blackjack table. Practice with a chart or trainer, be mindful of table rules that alter specifics, and play responsibly.