RTP or a slots’ payout rate is a measure of how much that game will pay back to the players over a long period of time. It is expressed as a percentage of the total wagered money to the total winnings handed out by the casino for a particular slot game. The RTPs differ from one slot to another. It is set for each game by the game’s software developer. The higher the RTP of a slot, the better it is for the players. Today, most online slots have an RTP of 95% or more. British slot sites show the RTP’s of all their games, and the UK Gambling Commission mandates the display of the games’ RTP in all UK online casinos.