Blackjack Basic Strategy — The Complete Chart (Hit, Stand, Double, Split)

Basic strategy is the single most important tool a blackjack player has. It is not a guess, not intuition, not 'a feel for the cards' — it is a table calculated in the 1950s by four US mathematicians (Baldwin, Cantey, Maisel, McDermott) and refined in billions of hand simulations since. For every possible combination of your hand and the dealer's upcard, it gives the decision that maximizes expected value: hit, stand, double down, split, or surrender.

Why a table? Because blackjack is a solvable game. Unlike poker, where opponent behavior blurs the math, blackjack pits you against a dealer with fixed rules (hits to 16, stands on 17+). Every decision can be computed exactly — the table is the finished answer.

Assumptions for the chart below: 4–8 decks, dealer stands on soft 17 (S17), double after split allowed, surrender allowed, blackjack pays 3:2. This is the 'European / Vegas Strip' standard. Under H17 (dealer hits soft 17) or 6:5 payouts, a few cells shift — the core logic stays.

Hard hands (no ace, or ace counts as 1) — decision by dealer card 2–A: 5–8 always hit. 9: double vs. 3–6, else hit. 10: double vs. 2–9, else hit. 11: double vs. 2–10, hit vs. A. 12: stand vs. 4–6, else hit. 13–16: stand vs. 2–6, hit vs. 7–A. 17–21: always stand. Surrender (if allowed): 16 vs. 9, 10, A; 15 vs. 10.

Hard-hand logic: Between 12 and 16 you are in the 'death zone' — you lose most of the time no matter what. The rule is: if the dealer is likely to bust (upcard 2–6, bust probability 35–42%), wait. If the dealer shows a strong card (7–A), you must take risk yourself, because waiting loses for sure.

Soft hands (ace counts as 11, picture changes) — A,2 to A,5: hit, double vs. 4–6 (A,2/A,3) or 3–6 (A,4/A,5). A,6: double vs. 3–6, else hit. A,7: stand vs. 2, 7, 8; double vs. 3–6; hit vs. 9, 10, A. A,8 and A,9: stand. A,10: blackjack — collect.

Why soft hands are different: With an ace, you cannot bust as long as it is flexible — it drops from 11 to 1 if needed. That gives a 'free attempt'. So you double and hit far more often than on hard hands of the same total. A,7 (soft 18) is the most-played mistake: many players auto-stand even though doubling vs. 3–6 is clearly more profitable.

Pairs — splitting: A,A always split. 8,8 always split. 2,2 and 3,3: split vs. 2–7, else hit. 4,4: split only vs. 5, 6 (if DAS), else hit. 5,5: NEVER split — play as a 10 (double vs. 2–9). 6,6: split vs. 2–6, else hit. 7,7: split vs. 2–7, else hit. 9,9: split vs. 2–9 except 7; stand vs. 7/10/A. 10,10: NEVER split — 20 is a top hand.

The two splitting rules worth memorising: 'Aces and eights always, fives and tens never.' That eliminates the worst errors. A,A gives you two hands starting at 11 — extremely profitable. 8,8 turns the worst hand in the game (16) into two fresh attempts starting at 8.

Insurance and even money: Ignore entirely. The insurance bet has a 7.4% house edge and is mathematically never correct — except for card counters. More in our blackjack insurance article.

How much does it save? A player with no strategy plays at ~2.5% house edge. Basic strategy brings that to 0.5%. At €100/hand and 80 hands/hour, that is €16 less lost per hour — same playing time, no risk added. Over a year at 4 sessions/month: about €770 saved. The chart is free.

Practical tips: Print the chart or open it on your phone — online casinos and most live tables allow it. Drill 200–300 hands with the chart beside you and the common spots (12–16 vs. dealer card, A,7, 8,8, A,A) become automatic. The rest follows with practice.

What basic strategy is NOT: It does not make you a winner — the house edge stays positive. It is not card counting — it uses no information from previously dealt cards. It simply minimises your loss. Anyone aiming for long-term profit also needs card counting, which is essentially impossible online (see our article on that).

Related on Casinokeller: 'Blackjack house edge with basic strategy' (works the 2% → 0.5% effect in detail), 'Does card counting still work?' (why online the answer is no), 'Which casino game has the lowest house edge?' (blackjack ranked). For the game itself: the blackjack hub with all variants.

Bottom line: The basic strategy chart is 70 years old, mathematically perfect, free, and legal at every table. Playing blackjack without it gives away ~2 percentage points of house edge — per hand. There is literally no rational reason to play without it.