The best blackjack strategy is basic strategy, a fixed set of correct plays covering every hand you can be dealt against every dealer upcard.
When applied consistently, it keeps the house edge under 1% across most rule sets. No betting system, hunch or table superstition moves that number anywhere near as far.
If you’re looking for how to win at blackjack, the advantage comes from applying basic strategy on every hand, and not from luck or a betting pattern.
The 15 decisions below are the ones that come up most often and cost the most when you get them wrong. You’ll also find the full chart set out so you can read it at a glance, the mistakes that quietly drain recreational bankrolls, and four ways to commit the lot to memory.
Key Takeaways for Blackjack Strategy
- Follow a basic strategy chart on every hand. Correct play keeps the house edge under 1% in many rule sets.
- Check the payout before you sit down. A 6:5 table adds around 1.4 to 1.5 percentage points to the edge.
- Always split 8s and Aces, never split 5s or 10s, and never take insurance.
- Match your chart to the table rules: number of decks, S17 or H17, DAS or NDAS, and surrender.
- Apply the chart consistently. The benefit accumulates across thousands of hands, and none of them proves anything.
Note: Unless stated otherwise, these blackjack tips apply to most games and assume recreational play (not card counting). Always check the table rules first.
If this article interests you, keep reading. Alternatively, explore other topics like blackjack side bets and roulette strategy.
Blackjack Rules to Check Before You Play (S17, H17, DAS, NDAS)
- S17: the dealer stands on soft 17
- H17: the dealer hits soft 17
- DAS: doubling down after splitting pairs is allowed
- NDAS: doubling down after splitting pairs is not allowed
Check these before your first hand. A chart built for S17 will quietly cost you money on an H17 game, and the same goes for a DAS chart used at an NDAS table. Note that S17 and H17 describe the dealer’s hand. Playing a soft 17 of your own is a separate decision, and it comes up more often than most players expect.
Unless stated otherwise, everything below applies to most games and assumes recreational play without card counting.
The 15 Best Blackjack Strategies
Always Double Down on Hard 11
Hard 11 is the strongest doubling hand in the game. Against almost every dealer upcard, doubling collects more than hitting does. The one exception is multi-deck S17 against a dealer Ace, where hitting is marginally better.
Always Split 8s and Aces
Split 8s and Aces against any upcard the dealer shows. Splitting 8s breaks up a hard 16, the worst total in blackjack. Splitting Aces gives you two hands starting on the best card in the deck. One adjustment: on H17 multi-deck or H17 double-deck NDAS games, surrender 8-8 against an Ace if surrender is offered.
Never Split 5s or 10s
Treat 5-5 as a hard 10, which is a prime doubling hand, and keep 10-10 together. A 20 wins more often on its own than two hands each started from a single 10.
Hit Hard 12 Against a Dealer 2 or 3
Hard 12 against a 2 or a 3 loses money whichever way you play it. Hitting loses less, so hitting is correct.
Hit Soft 18 Against a Dealer 9, 10 or Ace
Soft 18 (A-7) isn’t strong enough to stand on against a 9, a 10 or an Ace. Hitting opens a route to 19, 20 or 21 with no bust risk on the next card. The exception is single-deck S17 against a dealer Ace, where standing is marginally better.
Double 10 Against a Dealer 9 or Lower
With a two-card 10, double when the dealer shows 2 through 9. You’re the favorite in the hand, and doubling wins more over the long run than hitting does.
Adjust Your Doubling on H17 Tables
On H17 tables, three extra doubles become correct: hard 11 against an Ace, soft 19 (A-8) against a 6, and soft 18 (A-7) against a 2. Small changes on their own, but they add up over thousands of hands.
Double Soft 13 to 18 Against a Dealer 5 or 6
Double A-2 through A-7 when the dealer shows a 5 or a 6. Those are the dealer’s two weakest upcards, and a soft hand can’t bust on the extra card, so putting more money out carries little downside.
Stand on 9-9 Against a Dealer 7
With 9-9 against a 7, stand. The dealer’s most likely total is 17, and your 18 already beats it. Splitting gives away a made winner.
Surrender the Worst Hands When It’s Offered
Where surrender is available, use it on hard 16 against a 9, 10 or Ace, and on hard 15 against a 10. That saves half your bet in the worst spots on the chart and reduces long-term losses.
Double 8 Against a Dealer 5 or 6 in Single-Deck
In single-deck blackjack, double a hard 8 against a 5 or a 6. The card mix in a single deck shifts the math far enough that doubling overtakes hitting here. It’s the wrong play on any multi-deck game.
Split 2s and 3s Against a Dealer 2 or 3 When DAS Is Allowed
With 2-2 or 3-3 against a 2 or a 3, split when DAS is allowed and hit when it isn’t. In single-deck games, split 2-2 against a dealer 3 even without DAS.
Never Take Insurance or Even Money
Insurance pays 2 to 1, and the true odds of the dealer holding blackjack are longer than that, so the bet loses money across any meaningful run of hands. Even money is the same wager under a friendlier name, offered when you hold blackjack against a dealer Ace.
Consider Standing on a Multi-Card 16 Against a Dealer 10
Basic strategy hits hard 16 against a 10 when surrender isn’t available. There’s a refinement worth knowing: if your 16 is made up of three or more cards, such as 7-5-4, standing performs marginally better, because those small cards are no longer in the deck to help you.
Avoid 6:5 Blackjack Tables
A 6:5 payout instead of the standard 3:2 adds roughly 1.4 to 1.5 percentage points to the house edge, and in many multi-deck games that pushes the total edge past 2%. Check the payout before you sit down.
What Are the Most Common Blackjack Mistakes?
- Playing 6:5 tables. The payout cut costs far more than the rule change would suggest.
- Taking insurance or even money against a dealer Ace. Like most blackjack side bets, it pays back less than it costs.
- Standing on soft 18 (A-7) against a dealer 9, 10 or Ace.
- Ignoring the table rules. S17 against H17 and DAS against NDAS both change the correct play.
- Chasing losses with a betting system instead of sticking to correct decisions and a set budget.
- Trusting instinct on a hand the chart has already answered.
How Does a Blackjack Strategy Chart Work?
A blackjack strategy chart gives the correct play for every combination of your hand and the dealer’s upcard. Reading one takes three steps:
- Find your hand down the left-hand side (hard total, soft total or pair).
- Find the dealer’s upcard along the top.
- Play the letter where the two meet: H for hit, S for stand, D for double, P for split, R for surrender.
That’s the whole method. The value is in following it on every hand, including the ones where the correct play feels wrong.
Example Plays From the Chart
- 6-6 against a dealer 4: split. Two hands starting on 6 both do better against a weak upcard than one hard 12 does.
- 15 (10-5) against a dealer 6: stand. The 6 is one of the dealer’s two worst cards, and hitting risks breaking a hand that’s already ahead.
- A-7 (soft 18) against a dealer 9: hit. Standing leaves you short of the dealer’s likely total.
- 10 against a dealer 9: double. You’re favored to draw a strong card against an upcard that’s vulnerable.
- 16 against a dealer Ace: surrender, where it’s offered. Half a bet back is the best available outcome.
Multi-Deck Blackjack Strategy Chart (4+ Decks, S17, NDAS)
The same chart in words, for the rules above.
Hard totals:
- 8 or less: hit.
- 9: double against 3 to 6, otherwise hit.
- 10: double against 2 to 9, otherwise hit.
- 11: double against 2 to 10, hit against an Ace.
- 12: hit against 2 and 3, stand against 4 to 6, hit against 7 to Ace.
- 13 to 16: stand against 2 to 6, hit against 7 to Ace.
- 17 or more: stand.
Soft totals:
- A-2 and A-3: double against 5 and 6, otherwise hit.
- A-4 and A-5: double against 4 to 6, otherwise hit.
- A-6: double against 3 to 6, otherwise hit.
- A-7: double against 3 to 6, stand against 2, 7 and 8, hit against 9, 10 and Ace.
- A-8 or higher: stand.
Pairs (NDAS, with the DAS variation in brackets):
- A-A and 8-8: always split.
- 10-10 and 5-5: never split.
- 9-9: split against 2 to 6 and 8 to 9, stand against 7, 10 and Ace.
- 7-7: split against 2 to 7, otherwise hit.
- 6-6: split against 3 to 6 (2 to 6 with DAS), otherwise hit.
- 4-4: hit (split against 5 and 6 with DAS).
- 3-3 and 2-2: split against 4 to 7 (2 to 7 with DAS), otherwise hit.
Surrender, where offered: hard 16 against 9, 10 and Ace, and hard 15 against a 10.
Use a Blackjack Strategy Chart Matched to Your Rules
A chart is only correct for the game it was built for. Check four things before you use one:
- Number of decks. Fewer decks change several plays, including the single-deck exceptions in tips 5, 11 and 12.
- Dealer on soft 17. S17 and H17 charts differ on doubling and standing decisions.
- Doubling after split. DAS and NDAS charts differ across most of the pairs section.
- Surrender. Its availability changes how you handle hard 15 and 16 against high upcards.
Using a chart built for other rules produces the same mistake every time that hand comes up, which does more damage than the occasional lapse in concentration.
How Much Does Basic Strategy Save You?
The house edge is the share of every bet the casino keeps on average over a long run of hands, and correct play is the only lever a recreational player has on it. Four scenarios, and what each does to the number:
- Following a chart correctly. The edge sits under 1% in many common rule sets, and even lower when the rules are favorable.
- Playing by feel, with frequent basic mistakes. The edge climbs above 2% over time.
- Playing 6:5 instead of 3:2. Roughly 1.4 to 1.5 percentage points on top of whatever the game’s edge already is.
- Taking insurance regularly. A further steady drain, since the bet has negative expected value every time it’s made.
How Do You Learn Basic Blackjack Strategy Faster?
None of this works without the underlying rules, so if the flow of a table is still new, start with how to play blackjack and come back once the sequence of a hand is second nature. From there, four methods do the job, and they work best in combination:
- Flashcards. Drill the hands that come up most, soft totals, 12 to 16 against strong upcards, and the pair rules, until the answer arrives without thought.
- A blank chart. Draw the grid and fill it in from memory. Where a whole row plays the same way, such as hard 17 and above, write the play once and rule a line across.
- Card practice. Deal yourself two cards and a dealer upcard, decide how you’d play it, then check yourself against the chart.
- Software and trainers. Apps and browser trainers flag mistakes as you make them, which is the fastest correction loop of the four.
Blackjack Strategy FAQ
What is the best blackjack strategy for beginners?
Basic strategy, worked from a chart that matches your table rules. It takes the guesswork out of every hand, and it’s the fastest improvement available to a new player.
Should you split 8s and aces every time?
Yes, in standard basic strategy. Those two plays together are among the largest single gains available to a recreational player.
Can you use a blackjack strategy chart at the table?
At an online blackjack table, yes, with nothing stopping you. In land-based casinos, a discreet pocket chart is usually permitted, though house rules vary, so it's worth checking first.
Should you ever take insurance?
Almost never. It carries negative expectation unless you’re counting cards and know the shoe is rich in tens.
How long does it take to learn basic strategy?
With daily practice, most players have the core decisions down inside a couple of weeks, and the exceptions settle in from there.
Does basic strategy guarantee you’ll win?
No. Blackjack carries short-term variance in both directions and no strategy removes it. What basic strategy does is make sure each individual decision is the mathematically correct one.
