Blackjack strategy chart: cut edge to 0.5%

What is blackjack basic strategy?

Basic strategy is the mathematically optimal decision for every possible combination of your hand and the dealer's up-card. It was first computed by Roger Baldwin in 1956 and refined with computer simulations that ran billions of hands. In 2026, the chart itself hasn't changed — the math is fixed — but the rules casinos offer around it have gotten stingier, which shifts the expected value (EV) of every decision.

The key insight: basic strategy does not guarantee you win any single hand. It guarantees that, averaged over millions of hands, no other decision produces a better result. Every deviation from the chart hands the casino more edge.

The house edge math: why 0.5% is the floor

In a typical 6-deck game with standard rules (dealer stands on soft 17, double after split allowed, 3:2 blackjack payout), perfect basic strategy produces a house edge of roughly 0.42%. That is the lowest edge of any game on the casino floor.

What that means in practice:

if you bet $10 a hand and play 100 hands per hour, your expected loss is about $4.20/hour. Compare that to a 96% RTP slot machine at the same $10 bet and 500 spins per hour — expected loss $200/hour. Blackjack, played correctly, is roughly 50x cheaper per hour of play.

Where the edge comes from:

the player must act first. If you bust (go over 21), you lose immediately even if the dealer also busts later. That single rule is worth about 8% to the house. Basic strategy claws back nearly all of it by telling you exactly when to stand on a stiff hand and let the dealer risk their own bust.

The decision matrix: hard totals, soft totals, pairs

Basic strategy is split into three sub-charts based on your hand type. Memorize them in this order — hard totals come up most often.

Hard totals (no ace, or ace counted as 1):

• 8 or less: always hit • 9: double vs. dealer 3-6, otherwise hit • 10: double vs. dealer 2-9, otherwise hit • 11: double vs. dealer 2-10, hit vs. ace • 12: stand vs. 4-6, hit vs. everything else • 13-16: stand vs. 2-6, hit vs. 7-ace • 17+: always stand

Soft totals (ace counted as 11):

• A,2 / A,3: double vs. 5-6, otherwise hit • A,4 / A,5: double vs. 4-6, otherwise hit • A,6: double vs. 3-6, otherwise hit • A,7: stand vs. 2, 7, 8; double vs. 3-6; hit vs. 9, 10, ace • A,8 / A,9: always stand

Pairs:

• Always split aces and 8s • Never split 5s or 10s • Split 2s, 3s, 7s vs. dealer 2-7 • Split 6s vs. dealer 2-6 • Split 9s vs. 2-6 and 8-9 (stand on 7 and 10-A) • Split 4s only vs. 5-6 if DAS is allowed

Why the rule variants matter more than the chart

The chart above assumes standard Vegas Strip rules. In 2026, most online and land-based casinos have quietly tightened the rules to squeeze more edge out of players. Each rule change is worth a specific number of basis points.

6:5 blackjack payout:

the single biggest trap. Instead of paying $15 on a $10 blackjack, the table pays $12. That one change adds 1.39% to the house edge — more than triple the total edge of a 3:2 game. Always confirm 3:2 before you sit down.

Dealer hits soft 17 (H17):

adds 0.22% to the edge. Common online and on low-limit tables.

No double after split (NDAS):

adds 0.14%.

No re-splitting aces:

adds 0.07%.

Continuous shuffle machine (CSM):

adds about 0.10% because it eliminates any small deck-composition edge.

Stacked together, a "bad" blackjack table can carry a 2%+ house edge — worse than European roulette. The chart is the same, but you're paying four times as much per hour to play it.

The 2026 reality: online RNG, live dealer, and side bets

Modern blackjack lives in three environments, and each treats basic strategy differently.

RNG (online software):

every hand is independently dealt from a fresh virtual shoe, so card counting is impossible. Basic strategy is all you have — and it is exactly enough to hit the ~0.5% edge advertised in the game's RTP.

Live dealer:

a real human deals from a real shoe streamed via camera. In theory this allows counting, but shoes are typically shuffled after 50% penetration, killing any long-run advantage.

Side bets (Perfect Pairs, 21+3, Insurance):

these are marketed as "small bets for big wins" but carry house edges between 3% and 7%. Insurance is the worst — a 7.4% edge for a 15:1 chance of the dealer having blackjack. Basic strategy is unambiguous: never take insurance, never take even money, and skip every side bet. They exist specifically to erase the 0.5% advantage the main game gives you.

House edge by rule set (perfect basic strategy)

EV of common bad decisions

Frequently Asked Questions

Do I really need to memorize the whole chart?

Yes, if you want the 0.5% edge. Playing "by feel" typically costs 1.5-2% in extra house edge, which quadruples your expected loss. Most casinos allow you to bring a physical strategy card to the table — this is legal and won't get you kicked out.

Does basic strategy still work if I'm card counting?

Basic strategy is the foundation counters build on. Counting adjusts a handful of decisions when the deck runs "hot" (rich in 10s and aces), but 95% of the time you're still playing straight basic strategy. Without it, counting is worthless.

Why does the dealer always seem to win the close hands?

Because you act first. If both you and the dealer bust, you still lose — that's the entire source of the house edge. Basic strategy accepts this asymmetry and tells you when to stand and force the dealer to take the risk of busting on their own.

Related Glossary Terms

• House Edge
• RTP (Return to Player)
• Variance and Volatility
• Stake