How slots work

How to check a slot's RTP, and why the studio page is not enough

The number on a review site is the studio's headline build. The number that applies to your money is the one in the game rules after login, so how to check a slot's RTP comes down to opening that panel inside the account, and on games that ship in several builds the two can differ by a full point. This is where to find it and what to do with it.

A magnifying glass over the rules panel of a slot showing a return line

Where the number lives, and where it does not

The return is printed by the game itself, in the rules pages behind the i or menu button on the game frame, on a line labelled RTP or Return to Player. That is the only place the loaded value appears. The lobby tile does not carry it, the casino's promotional page usually does not, and the studio's own site prints the headline build without saying which build a given casino runs. Gates of Olympus Super Scatter goes one step further: the studio page has an empty RTP field, and the only figures on record come from a review site listing 96.50%, 95.50% and 94.50%.

Our slot pages print the studio headline on the tile, and the demo on the page runs that same build. So the demo is a fair place to learn the game and a poor place to read the return you will play at. The check has to happen inside the account, with the game launched from the casino lobby.

Why one game can carry three different numbers

Studios sell most titles in several return configurations and the casino selects one at integration. Our facts file records the spread for a run of games. Sugar Rush 1000: the studio page prints 96.00%, a catalogue prints 97.5%, and a review site lists 97.50%, 96.53% and 95.50% as the three builds. Book of Dead: the studio page prints nothing, a review site lists five builds with 96.21% at the top, and a catalogue prints 94.25%. The Pragmatic Play mainstays follow the same pattern with less paperwork: the studio pages print 96.50% for Gates of Olympus, 96.51% for The Dog House, 96.55% for The Dog House Megaways and 96.51% for Wild West Gold, and a lower configuration of each exists at some casinos, so the panel at your brand can read below any of those four.

One point of return is one unit of every hundred staked. Over a session it is invisible; over a year of play at one brand it is the difference between the two builds, paid by you. The point of the check is not to chase decimals between games, which are noise, but to catch a brand that loaded the lower build of a game you play a lot.

When a difference is not a build

Sweet Bonanza is the counter-example: the studio prints 96.48% and a catalogue 96.51%, three hundredths apart. Not every difference is a different build; some are rounding or an outdated catalogue entry. A gap of a point or more is a build.

The check, screen by screen

  1. Log in and open the game from the lobby

    Not from our page and not from the studio site. The build is attached to the casino's integration, so only a launch from inside the account shows it. A bonus balance is enough; you do not need to stake.

  2. Open the rules from the game frame

    The i button, the three-line menu or the question mark, depending on the studio. Scroll past the paytable to the rules pages.

  3. Find the line labelled RTP or Return to Player

    Note the value to two decimals. Some games print a range or several values; the one marked as the current or configured return is the one in force.

  4. Compare it with the studio headline on our table

    The tile on the high RTP page is the studio figure. A match means the headline build. A lower figure means the casino chose a reduced configuration for this title.

  5. Repeat on the game your code lands on

    If you hold a no deposit code, the panel that matters is the code's game at the issuing brand. The Dog House carries the spins at Vavada Casino, Cactus Casino, Auf Casino, Cryptoboss Casino and Unlim Casino; Book of Dead at Play Fortuna Casino, Riobet Casino and Spinbetter Casino.

  6. Write it down

    A brand can switch builds over time. A note of the value and the brand lets you see the change on your next session without relying on memory.

The studio figures for the comparison in step four are on the high RTP slots table.

What to do when the loaded number is lower than the tile

A lower build is a fact about that brand, not about the game. The same title at another casino may run the headline, and the check takes a minute per brand. If you play one game most of the time, that minute is the most valuable comparison you can make between two casinos, more than any welcome page. Our reviews list the studios each brand carries; the build each brand loads is something only the panel shows, so we do not print it on the review, and the check is yours to run.

A lower build is also not a reason to abandon a code. The spins are free; they run on whatever the brand loaded, and a reduced return on a hundred free spins changes the expected result by a fraction of one spin's value. Use the spins, then choose where your own money plays. Wagering on no deposit codes is the term that decides the value of those spins; the build is a distant second.

What the number cannot tell you

The return is a long-run average over every player on that build. It says nothing about the next hundred spins, and it says nothing about the shape of the game: Big Bass Bonanza at 96.71% and Sugar Rush Super Scatter at 96.58% are a tenth of a point apart and play nothing alike, one labelled Med-High with a 2,100x ceiling, the other High with a 50,000x ceiling. Slot volatility is the label that describes the session; the return describes the year.

It also says nothing about the rest of the casino. A brand can load the headline build of every slot and still print 45x wagering on its code or hold a withdrawal behind a document check. The build is one line on the checklist; what RTP means covers the arithmetic, and the casino reviews carry the rest of the lines.

Apply it

Run the check on the game the codes land on

The Dog House carries the no deposit spins at more brands than any other game in the catalogue. The studio headline is 96.51%; open the panel inside the account and compare.

Quick answers

Where is the RTP shown in a slot

In the game rules behind the i or menu button on the game frame, on a line labelled RTP or Return to Player. It is not on the lobby tile and rarely on the casino's game page. Open it from inside your account, because the demo on a review site shows the studio build, not the one the casino loaded.

Why is the RTP in my casino lower than the one on your table

Because the casino loaded a reduced configuration of the same game. Pragmatic Play's headline for The Dog House is 96.51%, and a lower configuration exists at some casinos; Gates of Olympus Super Scatter is listed in three builds from 96.50% down and Book of Dead in five from 96.21% down. The lower number in your panel is that casino's choice, and it applies to every spin you make there.

Do free spins from a no deposit code run on the same RTP

Yes, on whatever configuration the casino loaded for that game. The Dog House carries most of the codes in our catalogue, so the panel to read is The Dog House inside the account of the brand that issued the code, before the spins are used. The spin value is fixed by the brand and does not change the return.

Can a casino change the RTP after I start playing

The configuration is set per game in the casino's integration and does not change spin by spin. A brand can switch builds over time, which is why the panel is worth a second look after a break. Read the number, note it, and compare it on your next session.

Last updated - Checked by: GnomVRN