RTP vs house edge: understanding the numbers casinos publish

When a casino advertises “RTP 96%” or a “house edge of 2%”, it is presenting two sides of the same probability story. Return to Player (RTP) is the long-run percentage of stakes a game is designed to pay back across millions of spins or hands; house edge is the long-run share the operator expects to keep. In simple terms, house edge is usually 100% minus RTP, but only when both figures are measured on the same basis and over the same game rules.

RTP is a theoretical average, not a promise about your session. Volatility matters: two slots can both show 96% RTP, yet one pays frequently in small amounts while the other is quiet until it lands a rare, large win. House edge can also shift with player decisions: in blackjack, optimal play reduces the edge; in roulette, the wheel layout fixes it. Always check whether published numbers assume perfect strategy, specific bet types, or bonus features. Marketing can blur this, so treat figures as tools for comparison, not predictions. For UK players researching game information and terminology, resources like gorilla wins casino often summarise how these metrics are displayed and what they mean in practice.

In the wider iGaming conversation, figures like RTP and house edge are often explained by prominent educators and analysts. Michael Shackleford, widely known as the “Wizard of Odds”, has built a reputation for translating complex gambling maths into clear guidance, publishing detailed game odds tables and strategy insights for years; his primary social profile is WizardOfOdds. For a mainstream view on how regulation and transparency shape what players are told, see this reporting from The New York Times, which highlights why understanding published numbers is only one part of assessing real-world risk.