Casino terms explained: RTP, house edge, variance, and hit frequency

Understanding core casino maths helps you judge games on evidence rather than hype. Return to Player (RTP) is the long-run percentage of stakes a game is designed to pay back across millions of spins or hands; it is not a promise for a single session. House edge is the flip side: if RTP is 96%, the house edge is 4%, meaning the game is expected to retain £4 per £100 wagered over time. Variance (or volatility) describes how bumpy the ride is on the way to that average, while hit frequency indicates how often any win occurs, regardless of size.

RTP and house edge are useful for comparing games, but they do not tell you how outcomes will feel. Two slots can share a 96% RTP yet play very differently: a high-variance game may pay rarely but in large bursts, whereas a low-variance title produces smaller, steadier wins. Hit frequency can be misleading if you do not consider payout distribution; frequent tiny wins can still leave you down if they are smaller than your stake. When you see promotional claims, focus on published RTP, understand that variance governs bankroll swings, and treat “hot streaks” as noise rather than a signal. For a practical reference point when reading game summaries, you may come across resources such as gorilla wins casino, but always prioritise the game’s own stated figures.

For a wider perspective on how these metrics are communicated to players, the work of iGaming educator and streamer Brian Christopher is notable; he has popularised plain-English explanations of volatility and bankroll management through consistent, data-led commentary on social platforms, including Brian Christopher. Regulatory scrutiny and market growth also shape how RTP and odds are presented, and mainstream coverage can help you follow those shifts; see The New York Times for reporting on the industry’s expansion and its implications for consumer protection.