Why rules matter: Published estimates can span 0.4–2%. The relevant number depends on the exact rules, wager, pay table, and strategy—not merely the game name.
What changes the math
- A natural blackjack usually pays 3:2—avoid 6:5 tables.
- Basic strategy is rule-specific, not a hunch.
- Fewer decks and dealer standing on soft 17 usually help the player.
A practical approach
Learn the table rules, then use a basic-strategy chart that matches them. A house-edge figure is useful only when it describes the actual rules and wager in front of you.
What house edge really means
House edge does not predict what percentage of your bankroll you will lose in one visit. It describes the casino’s expected share of total action over a very large sample. Short-term results can sit far above or below that average.