Blackjack Basic Strategy in Plain English: The 11 Decisions That Decide Almost Every Hand
The blackjack strategy chart looks intimidating, but 95% of the hands you'll actually play are covered by 11 simple rules. Memorize these and the house edge collapses from 2% to 0.5%.
Basic strategy reduces the house edge in blackjack from ~2% (random play) to ~0.5% (perfect play). The full chart has 280 decisions, but 11 rules cover 95% of hands you'll see. Always split 8s and Aces. Never split 10s or 5s. Always double 11. Stand on hard 17+. Hit hard 12-16 only if dealer shows 7+. The remaining 5% is rare-edge stuff that costs you cents per session.
Blackjack is the only casino game where your decisions actually matter. Slot machines, roulette, baccarat, craps — your wagering choices barely move the math. In blackjack, the difference between perfect basic strategy and intuitive play is roughly 1.5 percentage points of expected loss. On a $25/hand, 60-hand-per-hour session, that's $22 per hour you don't lose.
The 11 rules that cover 95%
If you remember nothing else, remember these. They handle hard hands, soft hands, splits, and doubles for the most common situations.
- Always split Aces and 8s. No exceptions. Two 8s is 16 (terrible). Two 4s is 8 (fine). Splitting 8s breaks a losing hand into two playable hands.
- Never split 10s or 5s. Two 10s is 20 (excellent). Don't break it. Two 5s is 10 — better played as 10 (which you should usually double).
- Double on 11 against any dealer card except an Ace. 11 is the strongest doubling hand because hitting an Ace gives you a guaranteed 21.
- Double on 10 against dealer 2-9. Hit against 10 or Ace.
- Double on 9 only against dealer 3-6. Hit otherwise.
- Stand on hard 17 or higher. Always. Even against dealer 10 or Ace.
- Stand on hard 12-16 only against dealer 2-6. Otherwise hit.
- Hit hard 12-16 against dealer 7+. They likely have a 17+. You need to make a hand.
- Stand on soft 19+ (A-8 or A-9). Always.
- Double soft 13-18 against dealer 5 or 6. Otherwise hit (or stand on soft 18+).
- Take insurance only if you're counting cards. Never otherwise. Insurance is a sucker bet — the house edge is 7%.
Why these 11 rules work
The math behind every basic-strategy decision is the same: which choice has higher expected value (EV)? The chart you see online is the output of running every possible hand combination through a Monte Carlo simulator with the relevant rules (decks, soft 17, doubles, surrender).
The reason 11 rules cover 95% is that the EV difference between "hit" and "stand" on, say, a hard 13 against a dealer 5 is much smaller than the EV difference between hard 16 vs dealer 9 (where hit/stand is huge). The 11 rules above cover the high-leverage decisions.
You don't have to memorize 280 decisions. You have to memorize 11. The other 269 you can play "intuitive close-to-correct" and lose pennies.
The rules that change the house edge
Not all blackjack tables are equal. The house edge varies by these rule choices:
The biggest single rule that matters: 3:2 blackjack vs 6:5 blackjack. A 6:5 blackjack table — common at the Strip's $5-15 minimum tables — increases the house edge by 1.39%. That's enormous. Always play at a 3:2 table. If the table is 6:5, walk away.
Where to find the best blackjack rules
In Vegas: the best 3:2 tables are at the high-limit rooms ($25+ min). On the lower-limit floors, 6:5 has taken over. As a rule of thumb, a $25 minimum 3:2 game has a lower expected loss per hour than a $10 minimum 6:5 game.
In Atlantic City: NJ regulators require 3:2 blackjack at all stakes — one of the most player-friendly markets in the country. Every AC casino has $10-15 minimum 3:2 tables.
In tribal casinos: rules vary by tribe. California tribes mostly run 3:2 with player-friendly rules. Foxwoods and Mohegan Sun in CT have 6:5 on some floors but 3:2 in the high-limit rooms.
Putting it together
Memorize the 11 rules. Find a 3:2 table. Avoid insurance. Don't deviate emotionally — the math doesn't care that you "feel like" the dealer has a 10 in the hole.
For our hands-on take on which casinos in AC and Vegas have the best 3:2 game density: see our AC guide. For comp economics on blackjack play: how casino comps actually work.
Topics
- blackjack
- strategy
- math