At the bottom of "Can casinos change RTP?" lies a single number: the share of each stake a game keeps on average, known as the house edge. At table games it follows directly from the rules. A change in one payout or one dealer rule moves it, sometimes by more than the gap between two whole games. Knowing which rules matter lets a player compare tables in seconds and see what an hour of play is likely to cost.
The expected cost of play is the edge applied to the total amount staked, and the pace of a game decides how fast that total grows. A fast online table can deal several times more rounds per hour than a busy physical one, so a small edge applied quickly can cost more than a larger edge applied slowly. Multiplying the average stake by the rounds per hour and by the edge gives a fair estimate of what an hour at a given table is going to cost.
Blackjack played with sound strategy carries one of the lowest edges in a casino, often under one percent, and the rules decide exactly where it lands. A natural paid at six to five instead of three to two adds more than a full percentage point on its own. Fewer decks, the right to double after splitting and an offer of surrender each trim the edge slightly. A player who guesses instead of following basic strategy pays several times the published figure.
The banker bet keeps a little over one percent after its commission, the player bet slightly more, and the tie keeps around fourteen percent despite its generous payout.
In the rules of the table, which fix the edge before the first hand is dealt and usually take about a minute to read.
A natural paid six to five instead of three to two adds more than a full point, while fewer decks, doubling after splitting and surrender each trim the edge a little.
A wheel with one green zero keeps about 2.7 percent of each bet, and a second zero lifts that to about 5.3 percent while every payout stays identical.