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What Is a Soft 17 in Blackjack?
A soft 17 is any blackjack hand totaling 17 that contains an Ace counted as 11. The most common example is Ace-6, but combinations like Ace-2-4 or Ace-3-3 also qualify. The term "soft" refers to the flexibility of the Ace—it can switch from 11 to 1 if additional cards would cause a bust.
This distinction matters because soft hands carry zero bust risk on the next hit. A player holding Ace-6 can safely take another card. If dealt a 9, the Ace converts to 1, creating a hard 16 instead of busting at 26.
Soft 17 vs Hard 17 Comparison
| Hand Type | Example | Ace Value | Bust Risk on Hit |
|---|---|---|---|
| Soft 17 | Ace-6 | 11 (flexible) | 0% |
| Hard 17 | 10-7 | N/A or 1 | 69.2% |
| Soft 17 | Ace-3-3 | 11 (flexible) | 0% |
| Hard 17 | 9-8 | N/A | 69.2% |
Dealer Hits Soft 17 vs Stands on Soft 17
Casinos implement one of two dealer rules for soft 17. Tables displaying "Dealer Must Hit Soft 17" (H17) require dealers to take another card when holding soft 17. Tables showing "Dealer Must Stand on All 17s" (S17) force dealers to stop at any 17, including soft hands.
The rule is always printed on the table felt, typically near the insurance betting area. Before sitting down, checking this text reveals which version you're playing. Most Las Vegas strip casinos now use H17 on lower-minimum tables while reserving S17 for higher-stakes games.
How to Identify the Rule
| Table Text | Rule Code | Dealer Action on Ace-6 |
|---|---|---|
| "Dealer Hits Soft 17" | H17 | Must hit |
| "Dealer Must Stand on All 17s" | S17 | Must stand |
House Edge Impact: 0.2% Difference
The H17 rule increases house edge by approximately 0.2% compared to S17 games. This percentage sounds negligible but compounds significantly over extended play sessions. Computer simulations across millions of hands confirm this mathematical disadvantage consistently.
When dealers hit soft 17, they bust more frequently—which benefits players. However, the hands that don't bust often improve to 18, 19, 20, or 21, beating player hands that would have won against a standing 17. The improvement outcomes outweigh the additional busts, creating net advantage for the casino.
Annual Cost Example for $25 Bettor
A $25 bettor playing 50 hands hourly loses approximately $2.50 more per session at H17 tables versus S17 tables. Over 100 sessions annually, this equals $250 in additional expected losses from this single rule difference.
Strategy Adjustments for H17 Games
Basic strategy requires specific modifications when the dealer hits soft 17. These adjustments account for the dealer's increased probability of improving their hand. The changes primarily affect doubling down and surrender decisions against dealer Ace.
| Your Hand | Dealer Shows | S17 Strategy | H17 Strategy |
|---|---|---|---|
| 11 | Ace | Hit | Double |
| Soft 19 (A-8) | 6 | Stand | Double |
| Hard 15 | Ace | Hit | Surrender |
| Hard 17 | Ace | Stand | Surrender |
| 8-8 | Ace | Split | Surrender |
These modifications apply only when surrender is available. Most online platforms and many live casinos don't offer surrender, in which case you revert to the default hit/stand/split decision for those specific hands.
Player Soft 17 Strategy
Regardless of dealer rules, players should never stand on soft 17. The hand's flexibility eliminates bust risk, and 17 loses to any dealer total of 18 or higher. Taking another card provides opportunities to improve without downside.
Against dealer upcards of 3 through 6, doubling soft 17 maximizes expected value. These weak dealer cards produce bust rates between 35% and 42%, making aggressive play profitable. Against dealer 2, 7, 8, 9, 10, or Ace, simply hitting remains optimal.
The mathematics favor action on soft 17 because standing guarantees losing to 18+ while hitting or doubling creates paths to stronger totals. For detailed strategy charts covering all hand combinations, see our complete blackjack basic strategy guide for beginners.