Calculate when surrendering in blackjack is mathematically correct. Compare expected values of surrendering vs playing to make optimal decisions.
Decision
SURRENDER
Surrender EV
-50.0%
Always -50%
Play EV
-54.0%
Basic strategy
Savings
$0
Per hand
Common surrender hands
Dealer up card
For money calculations
Late is most common
| Hand | Dealer | Reason |
|---|---|---|
| Hard 16 | 9, 10, A | Classic surrender hand |
| Hard 15 | 10 | Borderline, usually surrender |
| 8-8 pair | A | Only if RSA not offered |
| Hard 17 | A | Only in H17 games |
Early surrender allows you to forfeit before dealer checks for blackjack, making it much more valuable and expanding correct surrender situations:
With late surrender, surrender hard 16 against dealer 9, 10, or Ace, and hard 15 against dealer 10. With early surrender (rare), the list expands significantly because you can surrender before dealer checks for blackjack.
Late surrender (standard) allows surrender only after the dealer checks for blackjack. Early surrender (rare, mostly historical) allows surrender before the dealer checks, making it much more valuable and expanding correct surrender situations.
When your expected loss from playing exceeds 50%, surrendering for exactly 50% loss is better. Hard 16 vs dealer 10 loses about 54% on average when played, so surrendering saves 4% of your bet.
Only if resplit Aces (RSA) is not allowed. If you can resplit, splitting 8s is better. Without RSA, surrender 8-8 vs Ace because the split EV is worse than -50%.
Quick-start with common scenarios
Decision
SURRENDER
Surrender EV
-50.0%
Always -50%
Play EV
-54.0%
Basic strategy
Savings
$0
Per hand