Updated: 29 August 2026
RTP—return to player—is a theoretical long-run percentage built into a game’s mathematical model. House edge describes the complementary advantage held by the casino. Neither number predicts what will happen in one session.
The basic relationship
If a game has a theoretical RTP of 96%, its house edge is 4%:
House edge = 100% − RTP
Across €10,000 of total stakes, a 4% edge corresponds to a €400 theoretical loss. That is an average over a very large number of outcomes, not a schedule. A player can win, lose everything or finish near even over a short period.
Turnover is larger than the starting balance
A €100 balance can produce much more than €100 of turnover as wins are re-bet. Expected loss is linked to total stake, which is why long sessions matter. At €1 per spin for 500 spins, turnover is €500 even if the original deposit was only €100.
Volatility changes the journey
Two slots can share the same RTP and feel completely different. A high-volatility game tends to concentrate more return in rarer outcomes, creating larger swings. A low-volatility game tends to pay smaller amounts more frequently. Neither pattern removes the house edge.
RTP variants
The same branded slot can be supplied in more than one RTP configuration. Check the paytable or help screen in the exact casino version. A review or provider page may describe another configuration.
Table-game rules matter
Blackjack house edge changes with deck count, dealer rules and player decisions. Roulette differs between single-zero, double-zero and other layouts. A category name is not enough; read the rule set before comparing percentages.
Never increase stakes because a game has lost repeatedly. Independent random outcomes do not owe the player a recovery.