Blackjack Soft Hands Strategy: A-2 Through A-9 Complete Guide
A soft hand contains an ace counted as 11 without busting. The ace's flexibility — it can drop to 1 if you draw too high — makes soft hands fundamentally different from hard hands. Most players underplay soft hands and give up significant EV as a result.
21simulator.com runs exact simulations so you can measure the EV cost of every soft-hand deviation from basic strategy.
What Makes a Soft Hand Different
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- You can hit or double soft hands without risking a bust on a single card.
- Doubling soft hands against weak dealer upcards (where the dealer is likely to bust) is frequently the highest-EV play — even on totals that look strong.
- Standing prematurely on soft hands against strong dealer upcards surrenders EV that hitting or doubling would recover.
The core principle: when you have a soft hand against a weak dealer upcard (2–6), the dealer is likely to bust. That creates doubling opportunities. When you have a soft hand against a strong dealer upcard (9, 10, Ace), hitting and trying to improve your total is often correct.
Complete Soft Hand Decision Table
The following rules assume a standard 6-deck game with dealer stands on soft 17 (S17), double-after-split allowed (DAS), and late surrender available. See below for H17 adjustments.
| Your Hand | Total | Basic Strategy Rule |
|---|---|---|
| A-2 (soft 13) | Soft 13 | Double vs 5–6; hit otherwise. |
| A-3 (soft 14) | Soft 14 | Double vs 5–6; hit otherwise. |
| A-4 (soft 15) | Soft 15 | Double vs 4–6; hit otherwise. |
| A-5 (soft 16) | Soft 16 | Double vs 4–6; hit otherwise. |
| A-6 (soft 17) | Soft 17 | Double vs 3–6; hit otherwise. |
| A-7 (soft 18) | Soft 18 | Double vs 3–6; stand vs 2, 7, 8; hit vs 9, 10, Ace. |
| A-8 (soft 19) | Soft 19 | Always stand. |
| A-9 (soft 20) | Soft 20 | Always stand. |
Soft 13 and Soft 14 (A-2, A-3)
These are the weakest soft hands. Basic strategy doubles only against a dealer 5 or 6 — the two upcards where the dealer has the highest bust probability. Against everything else, hit to try to improve the total.
A common mistake is hitting when doubling is correct vs 5–6. The doubling opportunity on these hands has positive expected value: the dealer is likely to bust, and any ten-value card gives you a strong 13 or 14 (which immediately becomes a hard hand ending in a reasonable total).
Soft 15 and Soft 16 (A-4, A-5)
The doubling range expands to dealer 4–6. Against a dealer 4, the bust probability rises enough to make doubling soft 15 or 16 profitable. The reasoning is the same: the dealer must hit stiff totals and will bust at a higher rate vs their own weak upcards.
Against a dealer 2 or 3, these hands are still hits — not doubles. The dealer is weak but not weak enough to make doubling a net-positive play on such small soft totals.
Soft 17 (A-6)
Soft 17 is a particularly misunderstood hand because players conflate it with the dealer rule of the same name. When you hold soft 17, you must act — the "dealer stands on soft 17" rule applies only to the dealer.
Basic strategy doubles soft 17 against a dealer 3, 4, 5, or 6. Against a dealer 2, hitting is correct (the doubling edge disappears). Against a dealer 7 through Ace, hit — your soft 17 is not strong enough to stand against those upcards, and the dealer's bust probability drops.
Standing on soft 17 is never correct in a standard 6-deck game. The hand is too likely to improve with a draw, and standing gives up EV against virtually every dealer upcard.
Soft 18 (A-7): The Most Misplayed Soft Hand
Soft 18 is where the most EV is lost at the blackjack table. Many players always stand on soft 18, reasoning that 18 is a strong total. Basic strategy disagrees in several situations:
- Vs dealer 3–6: double. The dealer's high bust probability makes doubling highly profitable.
- Vs dealer 2, 7, 8: stand. Your 18 is competitive with what the dealer is likely to make.
- Vs dealer 9, 10, Ace: hit. This is the counterintuitive case. Against these strong upcards, the dealer is likely to make 19 or better. Staying at 18 loses more often than hitting and trying to improve.
The EV cost of standing vs 9 instead of hitting is roughly 1.8%. Against an Ace (in an H17 game), the cost of standing instead of hitting is even higher. Do not treat soft 18 as a standing hand against strong dealer upcards.
Soft 19 and Soft 20 (A-8, A-9)
Always stand. Soft 19 and 20 are strong hands in almost all situations. No doubling or hitting improves expected value enough to justify the risk of weakening the hand. The only marginal exception — doubling soft 19 vs a dealer 6 — exists in some rule variations, but it is not part of standard 6-deck basic strategy and the EV difference is negligible.
H17 Adjustments
In a dealer-hits-soft-17 (H17) game — now standard on most Las Vegas Strip shoe tables — one key soft-hand rule changes:
- Soft 18 vs Ace: Double in an H17 game (instead of hit). The dealer's additional draws in H17 make doubling slightly more profitable vs the Ace.
All other soft-hand rules remain the same between H17 and S17. The H17/S17 switch adds about 0.22% to the house edge overall — see the full H17 vs S17 comparison for the complete picture.
Why Players Get Soft Hands Wrong
Two instincts cause most soft-hand errors:
- Treating soft totals like hard totals. Soft 17 feels like "17" — a standing hand. But it's not hard 17; it can improve without busting, which completely changes the decision.
- Fear of reducing a good total. Soft 18 feels strong, so players stand against 9, 10, and Ace. Basic strategy says hit because the expected outcome of hitting is better than the expected outcome of standing against those upcards — even though individual draws can weaken the hand.
Running large simulations in 21simulator.com quantifies exactly how much each soft-hand error costs across tens of thousands of hands.