Direct Answer: Yes, but only if the table rules specify "H17" (Dealer Hits Soft 17). If the table specifies "S17" (Dealer Stands on Soft 17), the dealer must stop drawing immediately. A dealer hitting soft 17 increases the casino's house edge by approximately +0.22% against the player.
Every blackjack table in the world has a fixed rule printed on the felt dictating the dealer's mandatory drawing actions. It will always state one of two phrases:
- "Dealer Must Draw to 16 and Stand on All 17s" (S17 Table)
- "Dealer Hits Soft 17" (H17 Table)
To recreational players, having the dealer draw another card on a 17 sounds like a good thing because they might bust. However, the probability mathematics prove the exact opposite. Here is why H17 favors the casino, the exact probability breakdown, and how you must adjust your basic strategy.
1. What Exactly is a "Soft 17"?
A Soft 17 is any hand that totals 17 containing an Ace counted as 11 (such as Ace-6, Ace-2-4, or Ace-3-3).
Because the Ace can revert to a value of 1 if drawing a high card, a soft hand cannot bust on the next single card. For example, if a dealer holds Ace-6 (Soft 17) and draws a 10, the hand becomes a Hard 17 (1 + 6 + 10 = 17), not a bust.
2. The Mathematical Impact: Why H17 Favors the Casino
When a dealer is forced to stand on Soft 17 (S17), their hand is frozen at 17—a weak total that loses to any player 18, 19, 20, or 21.
When a dealer hits a Soft 17 (H17), they get a free risk-free opportunity to improve their total:
| Dealer Outcome on Soft 17 | S17 Table (Stand on Soft 17) | H17 Table (Hit Soft 17) | Mathematical Impact |
|---|---|---|---|
| Final Hand of 17 | 100.0% | 14.8% | Dealer moves away from weak 17 |
| Final Hand of 18 to 21 | 0.0% | 60.4% | Dealer improves to winning totals |
| Dealer Busts | 0.0% | 24.8% | Dealer busts only 1 in 4 times |
While the dealer does bust 24.8% of the time, they improve to a total of 18, 19, 20, or 21 over 60.4% of the time. The net statistical gain heavily favors the casino, adding +0.22% to the house edge.
3. House Edge Comparison Across Game Formats
Look at how the H17 rule interacts with double-deck blackjack tables and standard 3:2 payout rules:
| Table Configuration | Dealer Soft 17 Rule | Blackjack Payout | Total House Edge | Verdict |
|---|---|---|---|---|
| Double Deck (2 Decks) | Stand (S17) | 3:2 | 0.40% | Best Possible Table |
| Standard Shoe (6 Decks) | Stand (S17) | 3:2 | 0.58% | Solid Choice |
| Standard Shoe (6 Decks) | Hit (H17) | 3:2 | 0.80% | Acceptable (Standard Vegas Strip) |
| Any Table (6:5 Payout) | Hit (H17) | 6:5 | 1.97% - 2.15% | Terrible (Avoid) |
4. Basic Strategy Adjustments for H17 Tables
Because the dealer is more dangerous on H17 tables, perfect basic strategy requires three specific rule deviations compared to S17 tables:
- Double Down on 11 vs. Dealer Ace: In H17 games, always double down on 11 against a dealer Ace (in S17 games, you simply Hit).
- Double Down on Soft 19 (A,8) vs. Dealer 6: In H17 games with Double After Split (DAS), double down on Soft 19 against a 6 (in S17 games, you Stand).
- Surrender Adjustments: If late surrender is offered on an H17 table, surrender 15 vs. Ace, 17 vs. Ace, and 8,8 vs. Ace.
Frequently Asked Questions
Is S17 always better for the player than H17?
Yes. An S17 table (where the dealer stands on all 17s) reduces the house edge by 0.22% across all deck configurations and should always be prioritized.
Why do casinos use H17 on low-limit tables?
Casinos use H17 on low-limit tables to maximize their mathematical hold. S17 tables are typically reserved for high-limit rooms ($50–$100 minimum bets).
Can the dealer hit a Hard 17?
No. No casino allows a dealer to hit a Hard 17 (such as 10-7 or 9-8). Doing so would result in an immediate bust on any card higher than a 4.
Summary Key Takeaways
- The dealer only hits soft 17 if the table felt explicitly states "Dealer Hits Soft 17" (H17).
- H17 increases the casino's house edge by +0.22% because the dealer improves their hand 60.4% of the time without risk of an immediate bust.
- Always seek out S17 tables whenever available to preserve optimal player odds.