How Rules Change the House Edge
Blackjack tables aren’t all the same game. Two small rule differences — whether the dealer hits a soft 17, and whether a natural blackjack pays 3:2 or 6:5 — move the house edge more than most players realize.
Assumes optimal (basic strategy) play under each ruleset, computed exactly from the same engine behind the strategy chart.
Dealer hits soft 17 (H17) vs. stands (S17): when the dealer must hit a soft 17 instead of standing, they get another card-drawing chance to improve a middling hand into a strong one, which shifts the edge from 0.373% to 0.5949% here — roughly a 0.222 point swing from one rule. Small, but it compounds over thousands of hands, which is exactly why serious players look for S17 tables.
6:5 blackjack payout: a natural blackjack traditionally pays 3:2 (bet $10, win $15). Many tables — especially single-deck games marketed as player-friendly — now pay 6:5 instead (bet $10, win $12). That one change alone moves the edge from 0.373% to 1.7259% — a jump of about 1.4 percentage points, making it one of the worst rule changes a table can have, worse than almost any strategy mistake a player might make.