The sign on the felt decides the rule
Before you buy in at a blackjack table, look at the felt. Somewhere near the dealer's right hand, printed on the layout or on a small placard, there is a line that reads either "Dealer stands on all 17s" or "Dealer hits soft 17." That one line changes how the dealer plays every hand that reaches a total of 17, and it changes what you should do with a few of your own hands. It is not a hidden rule, and it is not the same at every table in the building.
The question "does the dealer have to stop at 17" has a two-part answer. On a hard 17 — a hand with no ace counted as 11 — the dealer always stops. There is no common variant where the dealer draws to a hard 17. On a soft 17 — a hand containing an ace counted as 11, such as ace-6 — the dealer either stops or hits, depending on the table rule. That distinction is the entire subject.
What a soft 17 is
A soft hand is any hand containing an ace counted as 11. The ace can also be counted as 1, which is what makes the hand "soft": it cannot bust by taking one more card. Ace-6 is a soft 17. If the dealer draws a 10 to it, the hand becomes a hard 17, because the ace now counts as 1. If the dealer draws a 5, the hand becomes a hard 12. The flexibility of the ace is why the soft 17 rule matters at all.
On a hard 17, the dealer has no such flexibility. A hand of 10-7, 9-8, or any other combination totalling 17 without an ace counted as 11 is finished. The dealer takes no more cards. This is true under every standard rule set.
| Dealer hand | What it is | Dealer stands on all 17s | Dealer hits soft 17 |
|---|---|---|---|
| 10-7 | Hard 17 | Stops | Stops |
| 9-8 | Hard 17 | Stops | Stops |
| Ace-6 | Soft 17 | Stops | Draws one or more cards |
| Ace-2-4 | Soft 17 | Stops | Draws one or more cards |
| Ace-6-10 | Hard 17 after drawing | Stops | Stops once hard |
The dealer never has a choice in the matter. The rule is automatic. The dealer does not decide whether to hit or stand based on the cards, the count, or the players at the table. The table rule dictates the action, and the dealer follows it every time.
Why the rule changes the house edge
When the dealer hits soft 17, the dealer gets an extra opportunity to improve a weak hand. Ace-6 is not a strong total. Drawing to it lets the dealer turn a mediocre 17 into an 18, 19, 20 or 21 more often than it turns the hand into a bust. The rule therefore increases the house edge on the table, all else being equal.
The size of that increase is not a number you should memorise as a constant, because the full edge depends on the complete rule set: number of decks, doubling restrictions, splitting rules, and whether surrender is offered. What you can rely on is the direction: a table where the dealer hits soft 17 is a slightly more expensive table to play than an otherwise identical table where the dealer stands. When you compare two tables in the same venue, the soft 17 rule is one of the first things to check.
House edge and RTP are complements: they sum to 100% for the same game under the same rule set. A rule change that raises the house edge lowers the RTP by the same amount. The soft 17 rule is one of the rule changes that moves both numbers.
How the rule reaches your strategy
Published basic-strategy charts derive from the specific rule set in use. Deck count, dealer stand rules, doubling and splitting rules all feed into the chart. A chart built for a game where the dealer stands on all 17s is not exactly right for a game where the dealer hits soft 17, and the reverse is also true. The differences are concentrated in a small number of close decisions.
The most visible changes involve doubling. Against a dealer 6, a player holding ace-7 (soft 18) doubles more readily when the dealer hits soft 17, because the dealer's hand is more likely to improve. The same logic touches soft 18 against a dealer 2 in some rule sets. The changes are not large, but they are real, and they are why a strategy chart should match the table you are sitting at.
If you use a chart, read its header. A properly labelled chart states the rule set it assumes. If the chart does not state whether the dealer stands or hits on soft 17, you are guessing. Find a chart that names the rule, or ask the dealer which rule the table uses and adjust accordingly.
The sequence of a hand under either rule
The dealer's stopping rule sits at the end of a fixed sequence. Cards are dealt, players act, and only then does the dealer play. The dealer's hand is not a series of choices; it is a procedure.
After all player hands have been settled or busted, the dealer reveals the hole card. From that point, the dealer draws according to the table rule and nothing else. If the total is 16 or lower, the dealer draws. If the total is a hard 17 or higher, the dealer stops. If the total is a soft 17, the printed rule decides: stop, or draw. If the dealer draws to a soft 17 and reaches a hard 17 or higher, the dealer then stops. The rule applies once, at the moment the soft 17 appears.
Players who misunderstand this sequence sometimes think the dealer is "choosing" to hit a soft 17 against a table full of strong hands. The dealer is not choosing. The rule is automatic, and the dealer would make the same play against an empty table.
What to check before you sit down
The soft 17 rule is printed on the table. So are several other rules that change the edge: whether blackjack pays 3 to 2 or something less, whether doubling after splitting is allowed, and whether surrender is offered. Read the layout before you buy in. If a rule is not printed, ask the dealer. The dealer is required to know the table rules and will state them plainly.
The same rule can vary between tables in the same room. A pit may run some tables with one rule and others with another. The denomination of the table does not reliably tell you which rule applies. The felt does.
FAQ
Does the dealer have to stop on a hard 17?
Yes. In every standard blackjack rule set, the dealer stops on any hard 17. The dealer never draws to a hard 17, regardless of what the players hold.
What is the difference between a hard 17 and a soft 17?
A hard 17 contains no ace counted as 11. A soft 17 contains an ace counted as 11, most commonly ace-6. The soft hand can take a card without busting, which is why some tables require the dealer to draw to it.
How do I know which soft 17 rule a table uses?
The rule is printed on the table layout or on a placard near the dealer. It reads either "Dealer stands on all 17s" or "Dealer hits soft 17." If you cannot find it, ask the dealer before you play your first hand.
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