Does RTP change by casino? Yes — here's how configurable RTP works
This is the single most overlooked fact in the high-RTP niche. The same slot — same name, same graphics, same features — can pay a different RTP at different casinos, because the studio sells it in multiple builds and the operator picks one.
Why studios offer multiple RTPs
Game studios license their slots to hundreds of operators, and different markets and operators want different margins. So studios certify a single game at several RTP levels and let each casino choose. It's a commercial decision invisible to players: the 90.05% build of Starburst looks and plays identically to the 96.09% build — only the maths underneath differs. Nothing on the game's surface tells you which one you're on.
The provider RTP ladders
Here are the documented version ladders for the major studios. We publish the default as canonical and flag these titles Configurable in our database.
NetEnt — up to 8 settings
NetEnt's flexible-RTP programme offers up to eight builds, commonly 99 / 98 / 96 / 95 / 94 / 93 / 92 / 90%.
| Slot | Default RTP | Known builds |
|---|---|---|
| Starburst | 96.09% | 99.06, 96.09, 95.05, 94.05, 93.05, 92.05, 90.05% |
Play'n GO — 5 certified levels
Play'n GO certifies five RTP levels, typically 96 / 94 / 91 / 87 / 84% — an unusually punishing bottom rung.
| Slot | Default RTP | Known builds |
|---|---|---|
| Book of Dead | 96.21% | 96.21, 96, 94, 91, 87, 84% |
Pragmatic Play & others
Pragmatic Play and several other studios similarly offer multiple builds. For example, configurable behaviour also affects popular Pragmatic titles, where ante-bet and (where legal) feature-buy versions carry different RTPs again. We track the default for each and note where lower builds exist.
How to check the RTP you're actually playing
- Open the slot at your casino.
- Tap the menu / "i" / paytable icon (usually a small "i" or hamburger).
- Find the RTP line in the rules or info screen. UK-licensed casinos must show the active figure.
- Compare it to the default — if it's lower, the casino has licensed a tighter build. If a casino runs 91% or below on a game that defaults to 96%+, treat that as a red flag about how it treats players generally.
How to avoid the lottery entirely
If you'd rather not check every time, choose Fixed-RTP slots — titles that ship in a single build at every casino. Book of 99 (a flat 99%), Ugga Bugga (99.07%) and Blood Suckers (98%) all have fixed RTPs. In our RTP database you can tick "Show only Fixed-RTP slots" to hide every configurable title in one click.