A breakdown of common rule variations and the estimated cost in expected value. The baseline rule set is 6 Decks, Stand on Soft 17, DAS, RSA, LS

Number of Decks

Deck Variation Approximate House Advantage
Single Deck +0.59%
Double Deck +0.22%
6 Deck +0%
8 Deck -0.028%

Other Rules

Rule Variation Approximate House Advantage
Hit on Soft 17 -0.21%
No Double After Splits -0.14%
No Resplit Aces -0.07%
No Late Surrender -0.076%
6-to-5 Payout on Blackjacks -1.36%