Blackjack rules: beat the dealer, not 21.
Blackjack takes about ten minutes to learn. Almost everything that costs beginners money comes from one misunderstanding right at the start — that the object is to get as close to 21 as you can. It is not. This page covers the learning part: what the cards are worth, how a hand plays out, every option you have, and the fixed script the dealer has to follow.
The object is not to get 21.
You win a hand of blackjack in one of two ways: your total is closer to 21 than the dealer’s, or the dealer goes over 21 and you have not. That second one is doing more work than most players realise.
“Get as close to 21 as you can.”
Play that way and you hit hands you should stand on, because you are chasing a number instead of beating a hand. A 16 is a bad total, but it beats a dealer who busts — and a dealer showing a five busts more than four times in ten.
“End up better than the dealer.”
Sometimes that means standing on a total you are not happy with and letting the dealer break their own hand. Roughly two of every five hands you win are won that way, without your total ever mattering.
One more thing that surprises people: you are not playing against the other people at the table. Their decisions do not change what card comes next in any way that can be predicted, and nothing they do can cost you a hand. The player at third base who “took the dealer’s bust card” was equally likely to have taken the card that saved you.
What the cards are worth, and the one that changes.
There are only three rules here, and two of them are trivial.
A seven is worth seven. Suits are irrelevant in blackjack — there are no flushes here.
Jack, queen and king all count as ten, which is why sixteen of every fifty-two cards are worth ten.
Whichever helps. The ace counts as eleven until that would take you over 21, at which point it silently becomes a one.
Soft hands and hard hands
This is the only piece of blackjack vocabulary you actually need, and it exists entirely because of the ace.
An ace still counting as eleven. You cannot bust this hand by taking one more card — the worst that happens is the ace drops to a one. That is why soft hands get played far more aggressively than their total suggests.
No ace, or an ace that has already been forced down to one. Take a card here and a five or better busts you. Same total as the hand on the left, completely different hand.
How a hand actually plays out.
Six steps, always in this order. Step four is the one worth reading twice.
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You bet before you see anything
Chips go in the betting circle first. Every table has a minimum and a maximum printed on a placard; you cannot change the bet once cards are out, except by doubling or splitting.
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Everyone gets two cards
Both of yours face up. The dealer takes two as well — one face up, one face down. The face-up one is the upcard, and it is the single most important piece of information at the table.
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The dealer checks for blackjack
If the upcard is an ace or a ten, the dealer peeks at the hole card. If they have a natural the hand ends immediately: everyone loses except players who also hold one, who push. This is the standard US rule; some European tables deal the hole card later, which changes what you risk when you double or split.
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You play your hand out — first
Hit, stand, double, split or surrender, in turn, until you stand or bust. And here is the whole game: if you bust, your bet is collected there and then. The dealer has not acted yet and no longer needs to. That is where the house edge lives — not in the odds, in the running order.
This is the house edge -
The dealer plays a fixed script
They turn the hole card and draw until reaching a stopping total. No judgement, no reading you, no choices. The rule is printed on the felt.
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Hands are settled
Closer to 21 than the dealer wins; further away loses; the same total pushes and you get your bet back. If the dealer busts, everyone still standing gets paid.
Everything you are allowed to do.
Five moves, and at a live table each has a hand signal — the cameras above the pit need to see your decision, so saying it is not enough.
Take one more card. You can keep hitting as long as you are under 21.
Every hard total of 11 or less, always — you cannot bust and you can only improve.
Take no more cards and pass the decision to the dealer.
On hard 17 or better without exception, and on stiff totals when the dealer is showing a card they are likely to bust with.
Double your bet and take exactly one more card, then you are done whether you like the card or not.
When one card is very likely to make a winning hand and the dealer is weak — hard 11 against almost anything.
Turn one hand into two, each getting a second card and its own bet.
Always with aces and eights. Never with tens or fives — you would be breaking up a good hand to make two mediocre ones.
Give up the hand and take back half your bet.
On the genuinely hopeless spots — hard 16 against a dealer ten is the classic — where losing half is better than what you would average by playing it.
Insurance
When the dealer shows an ace they will offer insurance before anyone acts: a side bet, up to half your stake, that their hole card is a ten. It pays 2 to 1.
It sounds like protection and is priced like a losing bet. There are sixteen ten-value cards in every fifty-two, so the hole card is a ten a little under a third of the time, while the bet needs it a third of the time just to break even. Decline it every time, including when you are holding a blackjack and the dealer offers you “even money” — which is the same bet wearing a friendlier name.
The dealer has no choices at all.
Once your hand is finished, the dealer turns their hole card and follows one instruction, printed on the felt in front of them: draw to 16, stand on all 17s. They cannot stand early because the table looks dangerous, and they cannot take one more because you look strong. It is a script.
Because it is a script, it can be solved. Deal the rest of the shoe against every upcard and you get exactly how often the dealer finishes on each total — which is the whole basis of every decision you will ever make at a blackjack table.
| Showing | 17 | 18 | 19 | 20 | 21 | Busts |
|---|---|---|---|---|---|---|
| 2 | 14.0 | 13.5 | 13.0 | 12.4 | 11.8 | 35.4 |
| 3 | 13.5 | 13.0 | 12.5 | 12.1 | 11.5 | 37.4 |
| 4 | 13.0 | 12.4 | 12.1 | 11.7 | 11.2 | 39.6 |
| 5 | 12.2 | 12.2 | 11.8 | 11.2 | 10.8 | 41.8 |
| 6 | 16.6 | 10.6 | 10.6 | 10.2 | 9.7 | 42.3 |
| 7 | 36.9 | 13.8 | 7.9 | 7.9 | 7.4 | 26.2 |
| 8 | 12.9 | 36.0 | 12.9 | 6.9 | 6.9 | 24.4 |
| 9 | 12.1 | 11.7 | 35.2 | 12.0 | 6.1 | 22.9 |
| 10 | 11.2 | 11.2 | 11.2 | 34.0 | 11.2 | 21.2 |
| A | 13.0 | 13.1 | 13.1 | 13.1 | 36.2 | 11.5 |
How to read it
Everything above the line — 2 through 6 — is a dealer in trouble, busting between 35% and 42% of the time. Those are the cards you stand against on totals you would otherwise hate, and the cards you double and split against. They are weak for a mechanical reason: with a low card up, the dealer is very often forced to draw into a stiff total and then forced to draw again.
7 through ace is a dealer who is fine. They bust roughly one time in four or less, and an ace busts barely one time in nine. Against those you have to make a hand yourself, because they are not going to hand you one.
Two things to keep straight. A dealer natural is included in the 21 column above; against a ten or an ace, part of that column is a hand that ends before you ever act. And these are the dealer’s totals in isolation — they say what the dealer will do, not what you should do about it. That second question is what our strategy calculator answers, hand by hand.
What each result is worth.
Six possible endings, and only one of them pays more than even money.
Check the payout before you sit down
A natural has always paid 3 to 2. Over the last decade a lot of tables quietly moved to 6 to 5, and it is the single most expensive rule change in the game — it costs about 1.4% on its own, which is roughly three times the entire house edge of a well-played standard game. Nothing you do with the cards recovers it.
It is printed on the felt, usually in small type near the dealer. If it says 6 to 5, the correct move is to walk to another table — and our house edge calculator will show you what the one in front of you is costing.
The rules that are not the same everywhere.
Everything above this point is true at every blackjack table in the world. The following is not, and the differences are worth money. They are listed in the order you should check them.
| The rule | Look for | Avoid | Worth |
|---|---|---|---|
| What a blackjack pays By far the biggest. Check it first and check it every time. | 3 to 2 | 6 to 5 | 1.36% |
| The dealer on soft 17 Printed on the felt as “dealer must draw to 16 and stand on all 17s”, or “…hit soft 17”. | Stands | Hits | 0.22% |
| Doubling after a split Rarely advertised. Ask the dealer; they will tell you. | Allowed | Not allowed | 0.12% |
| What you may double on Restricted doubling mostly hurts soft hands, which is where a lot of the value is. | Any two cards | Only 9 to 11 | 0.10% |
| Surrender Worth having, and most tables do not have it. | Offered | Not offered | 0.07% |
| Number of decks The whole span from two decks to eight. Smaller than people assume — most players shop for this and ignore the payout. | Fewer | More | 0.26% |
Percentages are what each rule is worth against a six-deck game where the dealer stands on soft 17 — solved by re-running every possible opening hand with that one rule flipped, not copied from a list. Set the exact rules of your table in the house edge calculator and it will price that game and rank what is costing you most.
Six things almost everyone believes at first.
None of these are stupid. Most of them are the sensible-sounding conclusion you would reach from watching a few hands — which is exactly why they are worth taking apart.
Never bust — always let the dealer do it.
Then you would stand on 12 against a dealer ten, and lose far more often than you need to. The dealer makes 17 or better nearly four times in five from a ten, so a 12 that stands is usually just a losing hand that never tried. Standing is right when the dealer is likely to break; against a strong card it is surrender by another name.
Sixteen is hopeless, so it does not matter what I do.
It matters, it is just close. Hitting a hard 16 busts you about 62% of the time, which is why it feels awful — but against a dealer 7 or higher, standing is worse. Both plays lose money on average; the whole skill is picking the one that loses less.
The bad player at third base cost me that hand.
No. Their decision changed which cards came out, but it was exactly as likely to have helped you as hurt you — you only remember the times it hurt. Over any meaningful number of hands, other players at the table have no effect on your results whatsoever.
I am due — I have lost six in a row.
Cards do not remember. In a freshly shuffled shoe the next hand is drawn from the same distribution as the last one, and the shoe has no obligation to even things out. This is also why no betting system fixes anything: raising your bet after losses changes the size of the swings, never the expectation.
Insurance protects my good hand.
Insurance has nothing to do with the hand you are holding. It is a standalone bet that the hole card is a ten, paying 2 to 1 when it needs to pay better than that to break even. Taking it with a blackjack — the “even money” offer — is the same losing bet, just wearing a name that sounds like a favour.
Counting cards is illegal.
It is not illegal anywhere; it is simply keeping track of what has already been dealt. Casinos are private businesses and can ask you to leave, and it does not work at all online against a shuffled-every-hand RNG game. But nobody is breaking a law by paying attention.
Bust chances are counted directly from a six-deck shoe: taking one card on a hard 16 breaks it 62% of the time, on a hard 12 just 31%. That gap is why the two hands are played so differently despite both being “stiff”.
The whole page in five lines
If you remember nothing else from this, remember these.