Minimum spin speed
Every spin on a UK-regulated online slot must take at least 2.5 seconds from start to finish. That figure has been law since 31 October 2021 and remains in force. If the game in front of you is taking noticeably longer than that, you are probably playing something that falls under a different floor: five seconds, brought in on 17 January 2025 for what the standards call casino games.

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The distinction matters because players keep hitting the slower number and assuming their slot has been throttled. It has not. The game has changed category.
What the rule measures
RTS 14G—the requirement number both speeds sit under—does not count the time between pressing the button and seeing a result. It measures the minimum duration of the spin itself: the moment the reels, cards or wheel begin moving until the outcome is displayed and the game is ready for the next action.
A game can be longer than the floor. It cannot be shorter. Developers must find speed adjustments elsewhere in the design, because the Commission's remote gambling and software technical standards make the floor a hard gate inside the licence. Any remote operating licence holder, including ancillary remote betting operators, must comply under licence condition 2.3.1.
Two figures, one requirement number
The 2.5-second minimum arrived on 31 October 2021, written explicitly for slots. That update landed alongside a bundle of other RTS changes, but the headline was speed: a definitive curb on games that had been spinning so fast the regulator judged the pace itself a harm factor.
Fast forward to January 2025, and the same requirement number—RTS 14G—was rewritten. The Commission kept 2.5 seconds for slots and added a separate five-second floor for casino games. Same paragraph of the standards, two different thresholds, two different product types. The only exclusion written into the text is peer-to-peer poker.
That is the source of the confusion. A player hits a roulette or blackjack hand running at five seconds, remembers reading "2.5 seconds" somewhere, and assumes the operator has changed the slot they know. The slot has not changed. The product they are on was never a slot to begin with.
Which products the five-second floor covers
The Commission has not published an exhaustive taxonomy. The 17 January 2025 wording says "casino games" and carves out peer-to-peer poker. In practice, that pulls in everything dealt from a virtual shoe or spun from a virtual wheel where the house banks the game: roulette, blackjack, baccarat, casino hold'em, and the range of game-show hybrids that share the same underlying architecture.
Slots stay on 2.5 seconds. Live-dealer tables stream from a studio and sit outside the software-only RTS framework. Peer-to-peer poker—where players face each other and the operator takes rake—is the one named exception, which makes sense: the hand cadence is set by player decision clocks, not by a reel cycle.
The line between a slot and a casino game can be fuzzy at the edges, and a few titles straddle it. The regulator's own categorisation, not the lobby label, determines which floor applies. Operators themselves do not get discretion; the standard is assessed at the software level.
The package the change arrived in
The five-second rule did not arrive alone. The January 2025 update also banned turbo and slam-stop features outright under RTS 14E, meaning players cannot manually cut a spin or hand short. Autoplay, already heavily restricted, was tightened further under RTS 8A. Celebratory sound and animation for a return equal to or less than the stake were suppressed under RTS 14F.
Another less-noticed clause, RTS 14C, blocks operator-led functionality that lets a customer play multiple products simultaneously on one screen. And two requirements, RTS 2E and RTS 13C, now force the display of transactions to reflect net spend and net time, not gross turnover.
These moves together form a coherent shift: slow the session down, remove false wins, stop multi-tabling, and make the cost legible. The spin speed is the part players feel physically, which is why it gets asked about first.
What a slower game does not change
A five-second minimum does not alter the return to player, the house edge, or the probability of any outcome. The maths runs identically; the same random number generator picks the same result it would have picked at two seconds. The only thing that changes is the rate at which a player can commit money.
That has a real effect on session spend over an evening, because fewer spins per hour means less total exposure. But it does not make any individual bet cheaper or safer. A player who chases losses will still chase them, just across a longer clock. The floor is a friction mechanism, not a fairness mechanism.
The one structural concession is peer-to-peer poker, which remains outside the speed floor entirely. That exclusion is notable because poker is the format most often cited by skilled players as a game where decision time is part of the contest. The Commission appears to have accepted that distinction, at least in the current version of the standards.
Whether the two-tier floor holds or converges later into a single number for all house-banked digital games remains an open question. The Commission has not signalled a further revision, but the regulatory direction of travel—slower, more transparent, fewer simultaneous lines of play—has been consistent for three years.
Questions about spin speed
How long must a single slot spin take at a British casino?
At least 2.5 seconds. Requirement RTS 14G set a minimum spin speed for slots games of 2.5 seconds with effect from 31 October 2021.
Does the same 2.5 seconds apply to roulette and blackjack?
No. From 17 January 2025 the same requirement number, RTS 14G, set a minimum spin speed for casino games of 5 seconds, excluding peer-to-peer poker.
Who has to obey the technical standards?
Gambling software and remote operating licence holders, including ancillary remote betting. The standards apply to them under licence condition 2.3.1.
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