Why rules matter: Published estimates can span varies widely. The relevant number depends on the exact rules, wager, pay table, and strategy—not merely the game name.
What changes the math
- RTP is a long-run theoretical average, not a session promise.
- Volatility describes how unevenly wins tend to arrive.
- Two visually similar games may have different configurations.
A practical approach
Check published RTP where available, set a hard budget, and expect variance. 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.