Numbers
RTP is an average, not a session forecast
A return percentage describes a game over many plays; it cannot promise the outcome of a short session.
What the number describes
Return to player, usually shortened to RTP, describes the proportion of stakes returned as prizes on average. The Gambling Commission in Great Britain explains that this average is achieved over a significant number of plays. It is not a promise about an individual play or the money someone will receive during one session.
Why the time scale matters
A percentage can look precise while answering a much broader question than a reader expects. A game’s long-run return does not describe the order of its outcomes. It also does not say how often prizes arrive or how widely their sizes differ. Treat those as separate questions when reading a game description.
Keep the scope clear
The Commission’s guidance distinguishes fully random machines from compensated machines, whose design includes feedback from previous results. That distinction means broad claims about every machine can mislead. For a particular game, read its own disclosed rules. RTP is a piece of descriptive information; it provides no reliable route to recovering losses or predicting the next result.