How to Check Which RTP Version Your Slot Is Actually Running
Why Checking RTP Version Matters
A single slot game can run at dramatically different RTPs depending on which configuration the casino has selected. This is not a bug, an exploit, or a conspiracy — it's how the industry works. Game providers certify multiple RTP variants with independent testing labs, and casinos choose from this menu during setup.
How RTP Versions Work Technically
When a provider like Pragmatic Play develops a slot, they create a mathematical model — the paytable weights, symbol distributions, feature trigger probabilities, and bonus round mechanics. They then adjust specific parameters to create multiple RTP variants. Each variant is independently certified by testing labs (GLI, eCOGRA, BMM Testlabs) through billions of simulated spins.
What changes between versions varies by provider. Common adjustments include:
- Symbol weight adjustment: The probability of landing premium symbols vs low-value symbols shifts. At lower RTPs, premium symbols appear less frequently.
- Feature trigger frequency: Bonus rounds and free spins trigger less often at reduced RTPs. The bonus itself plays the same, but getting there takes more spins on average.
- Multiplier distribution: In tumble/cascade slots, the frequency of random multipliers or their maximum values may decrease at lower RTP settings.
- Wild symbol probability: The occurrence rate of wild symbols can be reduced, decreasing the frequency of substitution wins.
Crucially, the visual presentation remains identical. A player cannot tell from the animations or sounds whether they're on a 96% or 92% version. Only the underlying probability tables differ.
Step-by-Step: How to Find the Active RTP
Method 1: In-Game Info Panel (Most Reliable)
- Open the slot game at your casino.
- Look for an info button — usually an "ℹ️" icon, a "?" symbol, or a "☰" hamburger menu in the corner of the game screen.
- Navigate to the paytable or rules section. This may be labelled "Game Rules," "Info," "Paytable," or "Help."
- Scroll to the very bottom of the information pages. The RTP is typically listed in the final paragraph, often in small text.
- Compare the number to the provider's default RTP (listed in our slot reviews). If your game shows a lower number, the casino is running a reduced-RTP configuration.
Method 2: Casino Game Rules Page
Regulated casinos (UK, Malta, Sweden) are required to disclose RTP information. Look for a "Game Rules" or "RTP Information" link within the casino's game lobby — this is separate from the in-game info. Some casinos publish a master list of all games and their active RTPs.
Method 3: Compare to Provider Default
Every provider publishes a "default" or "advertised" RTP for each game. If the in-game number matches, you're on the standard configuration. If it's lower, the casino has selected a reduced variant. Here are the default RTPs for popular slots in our database:
| Slot | Provider | Default RTP | Known Variants | Lowest Known |
|---|---|---|---|---|
| Gates of Olympus | Pragmatic Play | 96.50% | 4 versions | ~87.00% |
| Sweet Bonanza | Pragmatic Play | 96.48% | 4 versions | ~87.00% |
| Starburst | NetEnt | 96.09% | 3 versions | 92.01% |
| Book of Dead | Play'n GO | 96.21% | Multiple | ~94.25% |
| Wolf Gold | Pragmatic Play | 96.01% | 4 versions | ~87.00% |
| Mega Moolah | Microgaming | 88.12% | 1 version | 88.12% |
| Dead or Alive 2 | NetEnt | 96.82% | 3 versions | 92.82% |
How Many RTP Versions Each Provider Offers
The number of available RTP configurations varies significantly between providers. Understanding each provider's approach helps you know what to look for:
| Provider | Typical Variants | Default RTP Range | Policy |
|---|---|---|---|
| Pragmatic Play | 4 per game | 96.0%–96.7% | Standardised 4-tier system across most titles. Lowest tier around 87%. |
| NetEnt | 2–3 per game | 96.0%–96.9% | Typically offers default plus 1-2 reduced versions. Gap usually 2-4% between tiers. |
| Play'n GO | Multiple | 96.2%–96.6% | Flexible system. Number of variants varies by game. In-game display is mandatory. |
| Microgaming | 1–2 per game | 96.0%–96.9% | Fewer variants historically. Progressive jackpot games are typically single-config. |
| Big Time Gaming | 2–3 per game | 96.0%–96.7% | Megaways titles typically have 2-3 certified configurations. |
Red Flags: When a Casino Might Be Running Reduced RTP
No casino will advertise "we use lower RTP versions." But several patterns correlate with reduced-RTP deployments:
- No-deposit bonuses or very generous promotions: Casinos offering unusually large bonuses may compensate by deploying lower-RTP game versions. The bonus cost is partially offset by higher house edges.
- Missing or hard-to-find RTP information: Regulated casinos in the UK and Malta must disclose RTPs. If a casino makes this information difficult to locate, check the jurisdiction.
- Curaçao-only licence: Curaçao regulation historically has the weakest RTP disclosure requirements. Casinos operating solely under a Curaçao licence face less scrutiny on which RTP configurations they deploy.
- RTP doesn't match provider default: If the in-game info shows 94.50% for a game you know defaults to 96.50%, the casino has actively chosen the reduced configuration.
What Regulators Require on RTP Disclosure
| Jurisdiction | RTP Disclosure | Change Notification | Player Impact |
|---|---|---|---|
| UK (UKGC) | Mandatory — must show actual RTP | Must notify regulator | Strongest protection. Players can always verify the active RTP. |
| Malta (MGA) | Mandatory since 2021 | Required | Player Protection Directive enforces transparency. |
| Sweden | Mandatory | Required | Demo and real-money versions must use identical RTP. |
| New Jersey | Mandatory | Required | Minimum 83% RTP. Cannot vary by more than 0.01% with wager size. |
| Curaçao | Not required | Not required | Weakest protection. Players must rely on in-game info panels. |
What to Do If Your Casino Runs Reduced RTP
Discovering a reduced RTP doesn't mean the casino is doing anything illegal — operators are free to choose from certified configurations. But it does affect your expected returns. Here's a practical framework:
Frequently Asked Questions
Can I see the RTP before I start playing a slot?
Yes — open the game and check the info/rules panel before placing any bets. The RTP is displayed in the paytable section, usually on the last page. You don't need to wager real money to read the game information. In regulated markets (UK, Malta), the casino may also list RTPs in a separate game rules page accessible from the lobby.
Do all casinos use the same RTP for the same slot?
No. Different casinos can deploy different RTP configurations of the same game. Casino A might run Gates of Olympus at 96.50% (default) while Casino B runs it at 94.50%. The game looks and sounds identical in both cases. This is why checking the RTP at your specific casino matters — provider-advertised RTPs are defaults, not guarantees.
Can a casino change the RTP while I'm playing?
In regulated jurisdictions, no — RTP changes require regulatory notification and typically apply to new sessions, not mid-session. The configuration is set at the server level during integration. In less regulated markets, technical protections vary, but reputable providers' software does not allow mid-session RTP changes.
Is demo mode RTP the same as real-money RTP?
Not always. Sweden requires demo and real-money versions to use identical RTP, but other jurisdictions don't mandate this. In practice, most reputable providers use the same math model for both modes, but there's no universal guarantee. Always check the RTP in real-money mode separately if you're playing in markets without this requirement.
Why would a provider offer reduced RTP versions?
Providers offer multiple configurations to serve different market segments. Casinos in highly competitive markets may deploy default RTPs to attract players. Casinos with large bonus programs or in markets with lower competition may choose reduced versions to maintain margins. Each configuration is independently certified — they're all legitimate mathematical models. Providers earn licensing fees regardless of which version is deployed.
Does Pragmatic Play always offer 4 RTP versions?
Pragmatic Play standardised their system to typically offer 4 RTP tiers per game, with the default being the highest (usually 96.0%–96.7%) and the lowest around 87%. However, some older titles may have fewer variants. The 4-tier system applies to most games released from approximately 2019 onwards. The exact percentages vary by game.