The Return to Player (RTP) of Rainbow Riches slots can vary depending on the specific version and the casino you choose to play at. Generally, Rainbow Riches slots have an RTP ranging from around 95% to 98%. RTP represents the theoretical percentage of wagers that a game will pay back to players over time. It’s important to note that RTP does not guarantee individual wins or losses but provides an indication of the game’s long-term payout potential.