Online casino editorial · 18+
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A slot's return to player is a designed figure taken from its paytable, not a count of spins. The Gambling Commission's own pages give the volumes it uses to check a live game against that figure, and a 10,000-session simulation shows how far a £20 session sits from it.
Read How many spins is RTP based on?: what the maths sheet says and what a session showsOpen the game's rules or help panel before staking; under RTS 3C a GB-licensed operator must make the RTP percentage, house edge or probability information easily available before you commit to gamble. The Commission's key-terms page says the theoretical RTP is the advertised figure displayed in the player-facing rules, so the panel is the place to read it.
From How many spins is RTP based on?: what the maths sheet says and what a session shows
Look in the game's 'help' or 'how to play' pages, the artwork inside the game, or the links on the game selection pages. The RTS 3C implementation guidance names those as the acceptable places, and says the figure should be the average theoretical return to player percentage.
From How many spins is RTP based on?: what the maths sheet says and what a session shows
Every operator on the Gambling Commission's register must meet RTS 3C, so the information is a licence requirement rather than a feature of any one site. This page names no operator; the test is whether the figure is reachable before you stake.
From How many spins is RTP based on?: what the maths sheet says and what a session shows