Blackjack Basic Strategy Chart

Why Basic Strategy Works

Every blackjack decision has a mathematically correct answer. Basic strategy is the set of plays that minimizes the house edge by choosing the action with the highest expected value (EV) for every possible hand against every dealer upcard.

The math behind it is straightforward: a standard deck has known card distributions. When you hold hard 16 against a dealer 10, simulations of millions of hands show that hitting loses less money on average than standing. Basic strategy simply codifies these results into a lookup table.

A perfect basic strategy player faces a house edge between 0.4% and 0.6% depending on table rules — far better than the 2-5% most casual players give up through guesswork. That difference compounds over hundreds of hands: a $25 bettor playing 80 hands per hour saves roughly $30-40 per hour by following strategy perfectly compared to playing by instinct.

Quick Decision Chart

This chart assumes a 6-deck shoe with S17 (dealer stands on soft 17), DAS (double after split allowed), and no surrender. If your table uses H17 or restricts doubling, see the H17 vs S17 guide for adjustments.

Hard Totals

Soft Totals

Pair Splits

Commonly Misplayed Hands

These are the hands where most players deviate from strategy. Each one costs you money over time.

Hard 12 vs Dealer 2 or 3 — Correct: Hit

Players assume any stiff hand should stand against a low card. But dealer 2 and 3 are not strong enough bust cards to justify standing on 12. You will bust 31% of the time by hitting, but the dealer only busts about 35% (vs 2) and 37% (vs 3) — and when they don't bust, your 12 almost never wins. Hitting is the lower-loss play.

Soft 18 (A,7) vs Dealer 9 — Correct: Hit

Soft 18 feels like a strong hand, but against a 9 it is an underdog. The dealer's expected average hand against a 9 upcard is about 18.2. Hitting gives you a chance to improve to 19-21 (catching an A, 2, or 3 helps), and you cannot bust — the ace will revert to 1 if needed. Standing on soft 18 vs 9, 10, or A is a common and costly mistake.

Pair of 8s vs Dealer 10 — Correct: Split

Splitting 8s against a 10 feels like throwing good money after bad. But hard 16 is the worst hand in blackjack — you lose either way. Splitting gives you two chances to build hands starting from 8, which is a much better starting position. Simulations show splitting 8s vs 10 loses less per dollar wagered than hitting or standing on 16.

How Rule Variations Change Strategy

The chart above assumes standard S17/DAS rules. Here are the most common variations and how they shift the correct play:

• H17 (dealer hits soft 17): Double on 11 vs Ace becomes correct. Double on soft 19 vs 6 becomes correct. The house edge increases by about 0.2%. See H17 vs S17 for a full breakdown.
• No DAS (no double after split): You split fewer pairs. For example, 4,4 vs 5-6 becomes a hit instead of a split. 6,6 vs 2 becomes a hit. Several marginal splits disappear without the double option.
• Surrender available: Surrender hard 16 vs 9, 10, A. Surrender hard 15 vs 10. Surrender adds about 0.08% to your expected return when used correctly — a small but free advantage.
• 6:5 payout: This is not a strategy variation — it is a game quality issue. A 6:5 table adds roughly 1.4% to house edge. Avoid these tables entirely. See 3:2 vs 6:5.

How to Train It

Memorizing strategy works best in stages, not all at once. Follow this progression:

1. Week 1 — Hard totals only. Focus on the 7 rows in the hard totals chart. Play 50+ hands per session in the trainer with hints on. Your goal is zero hesitation on hard decisions by the end of the week.
2. Week 2 — Add soft totals. Soft hands are counterintuitive (hitting soft 18 feels wrong). Drill these separately until the double-or-hit decisions for A,6 and A,7 feel automatic.
3. Week 3 — Add pair splits. Pair splits have the most conditional logic (depends on DAS, depends on what the dealer shows). Use the trainer's pair-specific drill mode to isolate these hands.
4. Week 4 — Full integration. Play mixed sessions with all hand types. Review your accuracy heatmap in the trainer. Focus additional drill time on any cells below 90% accuracy.

After four weeks, you should be playing near-perfect basic strategy. The next step is card counting drills.

Common Mistakes

• Playing by feel instead of chart. "I have a hunch" is the single most expensive sentence at a blackjack table. The chart exists because millions of simulated hands proved which play is best.
• Ignoring soft hands. Many players treat A,7 like hard 18. It is not. Soft hands have flexibility that the strategy chart exploits through doubling and hitting opportunities.
• Never splitting 8s vs high cards. Standing on hard 16 against a 10 or ace is worse than splitting. The math is unambiguous even though it means putting more money out.
• Taking insurance. Without counting, insurance is always a bad bet. Always. See the insurance math guide.
• Changing strategy based on other players. The third baseman's decision does not affect your expected value. Other players' actions are random noise — play your own hand by the chart.

Frequently Asked Questions

Does basic strategy guarantee I will win?

No. Basic strategy minimizes the house edge, but the house still has an edge (typically 0.4-0.6%). You will have winning sessions and losing sessions. Strategy ensures you lose the least over time — but to actually gain an edge, you need card counting.

Do I need a different chart for every casino?

Minor rule differences (H17 vs S17, DAS, surrender) change a small number of decisions. The core chart covers 90%+ of plays correctly across all standard games. If you learn one chart well, adjusting for rule changes requires learning only 5-10 exceptions.

Should I always split aces?

Yes. Two hands starting with an ace each have a strong chance of making 21 or at least a solid total. A pair of aces as one hand (hard 12 or soft 12) is much weaker. Splitting is always correct regardless of what the dealer shows.

Why does the chart say to hit 12 vs 2?

Dealer 2 only busts about 35% of the time. When the dealer does not bust, your 12 loses to almost everything. Hitting 12 gives you a 31% bust rate, but the times you improve to 13-21 more than compensate. It is a close decision, but hitting has higher EV.

Can I use basic strategy and card counting together?

Absolutely — card counting builds on top of basic strategy. You play basic strategy as your default, then deviate on specific hands when the count justifies it. See the Illustrious 18 for the highest-value deviations.

Related Guides

• H17 vs S17 rule impact
• 3:2 vs 6:5 payout math
• Card counting drills
• Illustrious 18 deviations
• Insurance math