H17 means dealer hits soft 17 in blackjack. A soft 17 is a dealer total of 17 that includes an ace counted as 11, such as ace-6. Under H17, the dealer must draw another card. Under S17, the dealer must stand. The rule is fixed by the table; the dealer does not choose based on instinct or the players’ hands.
Plain Talk
H17 is a small line on the table sign with a measurable long-run cost.
If the dealer shows ace-6:
- on an H17 table, the dealer draws
- on an S17 table, the dealer stops
The H17 rule usually favors the casino because the dealer gets a chance to improve some soft 17 hands without the same risk a hard 17 would face. The ace can change from 11 to 1 if needed, so many draw cards do not bust the hand immediately.
What Makes 17 “Soft”
A hand is soft when an ace is currently counted as 11 and can be reduced to 1 without the total exceeding 21.
| Dealer cards | Current total | Soft or hard? | H17 action |
|---|---|---|---|
| Ace-6 | 17 | Soft | Hit |
| Ace-2-4 | 17 | Soft | Hit |
| Ace-Ace-5 | 17 | Soft | Hit |
| 10-7 | 17 | Hard | Stand |
| Ace-6-10 | 17 | Hard after ace becomes 1 | Stand |
H17 does not mean the dealer hits every 17. It applies only while the total is a soft 17.
What Can Happen After the Hit
Start with dealer ace-6.
- Draw ace: the hand can become soft 18.
- Draw 2: soft 19.
- Draw 3: soft 20.
- Draw 4: soft 21.
- Draw 5: hard 12 because the ace changes to 1.
- Draw 10-value card: hard 17.
The draw can improve the dealer, leave the dealer with another drawing total, or convert the hand into a hard 17. The dealer then continues according to the full house rules.
H17 Versus S17
| Rule | Dealer action on soft 17 | General player effect | Typical sign wording |
|---|---|---|---|
| H17 | Dealer hits | Usually increases house edge | “Dealer hits soft 17” |
| S17 | Dealer stands | Usually lowers house edge | “Dealer stands on all 17s” |
The rule should be printed on the layout, table sign, electronic help screen, or game information page. If it is unclear, ask before buying in.
How Much Does H17 Cost?
The exact effect depends on the full rules, number of decks, and strategy used. A widely used rule-of-thumb is that changing from S17 to H17 adds about 0.22 percentage points to the house edge for a conventional blackjack game. The current Wizard of Odds blackjack rule-variation table lists dealer hits soft 17 as approximately a 0.22 percentage-point cost to the player.
That is a percentage-point change, not a claim that every H17 game has a 0.22% total edge.
Example:
- S17 game house edge under the assumed rules: 0.50%
- H17 adjustment: +0.22 percentage points
- estimated H17 edge: 0.72%
Actual values can differ because blackjack payout, surrender, double-after-split, number of decks, and other rules interact.
Expected-Loss Example
Suppose a player averages $100 per hand, receives 60 hands per hour, and plays for two hours.
Total action:
$100 × 60 × 2 = $12,000
Approximate added expected loss from H17 versus an otherwise identical S17 game:
$12,000 × 0.22% = $26.40
That $26.40 is a long-run average difference. It does not predict the player’s actual result during the two-hour session.
H17 Is Important, but Check the Bigger Rules First
Players sometimes focus on H17 while missing a much more expensive rule.
A common comparison is blackjack payout:
| Rule difference | Approximate player cost |
|---|---|
| Dealer hits soft 17 instead of stands | About 0.22 percentage points |
| Blackjack pays 6:5 instead of 3:2 | About 1.39 percentage points in a common comparison |
The exact effects vary, but the lesson is clear: H17 matters, yet a poor blackjack payout can matter far more.
When comparing tables, check:
- blackjack payout
- H17 or S17
- number of decks
- double-after-split rules
- surrender availability
- re-splitting rules
- restrictions on split aces
- whether the dealer checks for blackjack
Use the Blackjack Rule Variation Calculator to compare several settings together rather than judging one rule in isolation.
Does H17 Change Basic Strategy?
Yes. A few player decisions can change because the dealer’s final distribution changes under H17.
Examples in common multi-deck strategy sets may include decisions involving:
- 11 against a dealer ace
- 15 or 17 against a dealer ace when surrender is available
- soft 18 against certain dealer upcards
- soft 19 against a dealer 6
- pair 8s against a dealer ace
Do not use a generic chart without checking whether it was built for H17 or S17. Strategy also changes with deck count, surrender, and double rules.
The rule does not justify improvising hand by hand. Use the correct basic-strategy chart for the complete table rules.
H17 Is a Dealer Procedure, Not a Player Choice
The dealer must apply H17 mechanically.
A proper procedure is:
- total the dealer hand correctly
- identify whether the 17 is soft or hard
- draw on soft 17 if the table is H17
- stop on hard 17
- continue drawing if the new total is below the required stand point
- settle player hands only after the dealer hand is complete
A dealer who stands on ace-6 at an H17 table has made a procedural error. The floor must correct the hand under house and regulatory rules. The correction may depend on whether another card has already been exposed or whether bets have been settled.
Official Rules Can Use H17
H17 is not an informal dealer habit. Approved blackjack variants can specify it explicitly. Nevada Gaming Control Board rules-of-play documents, including Mega Blackjack and other approved games, state that the dealer hits soft 17.
The existence of an approved H17 variant does not mean every blackjack table in the casino uses H17. Each table’s posted rules govern.
From the Casino Side
Casinos use H17 as one part of game configuration. The choice affects:
- expected game hold over time
- dealer training and evaluation
- layout and sign wording
- basic-strategy materials
- electronic game settings
- surveillance review of dealer procedure
- dispute handling
- comparisons between main-floor and high-limit games
A casino may combine H17 with player-friendly rules in one game and with restrictive rules in another. Management should evaluate the full package, not advertise a single favorable feature while hiding several costly ones.
For dealer training, the critical distinction is not memorizing “hit ace-6.” It is recognizing any multi-card soft 17 correctly, including ace-ace-5 and ace-2-4.
Multi-Card Soft 17 Errors
The most common H17 error is not ace-6. It is a hand with several cards.
Examples:
- ace-2-4 = soft 17, hit
- ace-ace-5 = soft 17, hit
- ace-3-3 = soft 17, hit
- ace-2-4-10 = hard 17, stand
- ace-ace-5-10 = hard 17, stand
The dealer must retotal after every card. Once the ace must be valued as 1 to avoid busting, the hand may become hard.
Common Misunderstandings
“H17 means the dealer can choose to hit.”
No. The dealer must hit soft 17 under the rule.
“H17 means all dealer 17s are hit.”
No. Hard 17 stands in standard blackjack. Only soft 17 is affected.
“H17 adds exactly 0.22% to every blackjack game.”
No. About 0.22 percentage points is a useful common estimate. The exact effect depends on the full rule set.
“A low table minimum makes H17 irrelevant.”
The minimum controls stake size, not game quality. H17 still changes the expected return on every dollar wagered.
“S17 guarantees a good blackjack game.”
No. A table can be S17 and still have a poor 6:5 payout or restrictive double and split rules.
Hard Truth
Hard Truth: H17 is quiet because it changes the average by a fraction of a percent. Casino profitability is built from fractions of a percent repeated over enormous action.
Table-Selection Checklist
Before playing, confirm:
- Does blackjack pay 3:2 or 6:5?
- Does the dealer hit or stand on soft 17?
- How many decks are used?
- Is double after split allowed?
- Is surrender available?
- Can pairs be re-split?
- What happens to split aces?
- Is the strategy chart matched to these rules?
FAQ
What does H17 stand for?
Dealer hits soft 17.
Is ace-6 always soft 17?
It begins as soft 17 because the ace can count as 11. After another card, the ace may need to count as 1.
Is H17 worse than S17 for the player?
Usually yes. It commonly adds about 0.22 percentage points to the house edge compared with an otherwise identical S17 game.
Does H17 change every basic-strategy decision?
No. Most decisions remain the same, but several important cells can change.
Can a dealer stand on soft 17 because the table is busy?
No. Pace does not override the posted rule.
Related Reading
Continue with S17, H17 vs S17, Soft Total, Basic Strategy, House Edge, and Blackjack. Compare complete settings with the Blackjack Rule Variation Calculator and the Blackjack Strategy Tool.