Highest RTP Slots: The Best Paying Slots, Checked With Each Provider

The best RTP slots we could confirm are Book of 99 by Relax Gaming and Mega Joker by NetEnt, both paying back 99.00%. Other lists rank a few slots higher, but we could not confirm those figures with the providers.

We checked each RTP against the provider’s own figures, either inside the game’s rules or on the provider’s website. Inside a game, we read the rules in real money mode at crypto casinos where we have real money accounts. Everything was checked in November 2026.

Several of these slots also cap their wins low. 1429 Uncharted Seas pays back 98.6%, but its top prize is 670x the bet. Many are also hard to find, since 12 of the 21 slots other lists rank highest were missing from every crypto casino lobby we searched.

Reading the rules inside each game mattered as well. NetEnt lists Blood Suckers at 98.00%, but all three crypto casinos we checked that carry it run a 96.01% version.

VIP-Grinders has reviewed online poker rooms since 2013. Our casino testing method uses our own deposits, real play and real withdrawals.

This guide covers:

Slots With the Highest RTP: Our Confirmed List

These are the highest RTP online slots we could confirm, ranked by the figure each provider publishes. Two are 99% RTP slots, and six more top out between 98% and 98.9%.

RTP is the share of all money bet that a slot pays back over millions of spins, so these are also the best paying online slots in the long run. Our guide to what RTP means explains how it is calculated.

Biggest win is the provider’s top payout as a multiple of your bet. Two NetEnt slots also give a range in their own rules: Jackpot 6000 pays 95.0% to 98.9% depending on when you collect in Supermeter mode, and Codex of Fortune 90.2% to 98.0% depending on how you use its keys.

How We Checked Each RTP

We started with the 21 slots other lists rank highest. Then we went through every game page on NetEnt’s and Thunderkick’s sites and every World Match slot, 738 games in all, to catch any high RTP slot those lists missed.

We only list figures from places the provider controls, meaning the rules inside the game or the game’s page on the provider’s website. Inside a game, we opened the rules in real money mode, never demo, because a casino can run a different version from the demo.

NetEnt’s pages are the most detailed, with the RTP, hit frequency and, for most games, the top payout, as on its Mega Joker page. Relax Gaming’s site no longer has a page for Book of 99, so for the Relax slots we went into the game itself.

World Match Has the Most 98% Versions

World Match lists 18 slots with a version at 98% or more, more than any other provider we checked. Most also come in a version between 94.4% and 95.2%, and the casino chooses which one you get:

The other 11, including 3D Farm, Elite Commandos and Fruits Evolution, top out between 98.01% and 98.11%. None of the World Match slots we searched for were in the crypto casino lobbies we checked, which is why they sit apart from our main table.

The Next Tier: Slots Between 97% and 98%

Below 98%, the list gets longer. NetEnt and Thunderkick, which publish one RTP figure for each game, have eight slots between 97% and 98%:

World Match adds another 43 slots with a top version between 97% and 98%. Fruit Warp stands out here, with a top prize of 11,000x the bet at 97%.

Slots We Could Not Confirm

A few slots that other lists rank near the top are missing from our tables. We could not confirm their RTP with the provider, and none of the casinos we checked carries them:

We will add any of them once we can read the figure ourselves.

The Best Paying Slots on Our List, One by One

Here is what each slot in our main table offers besides its RTP, and how many of the five crypto casinos we checked carry it.

Book of 99: 99.00% RTP

Relax Gaming’s Book of 99 is the only 99% slot we found at crypto casinos. A meter fills with every wild symbol and triggers free spins at 99, and in free spins one symbol expands to cover whole reels.

Mega Joker: 99.00% RTP

NetEnt’s Mega Joker is a 3 reel, 5 line classic from 2008. You win in basic mode, then can play those winnings in Supermeter mode, and NetEnt lists a win on 17% of spins.

Jackpot 6000: 95.0% to 98.9% RTP

Jackpot 6000 is NetEnt’s 3 reel, 5 line classic from 2007, with a heads or tails double up and a Supermeter mode. Its rules put the RTP at 95.0% to 98.9%, because Supermeter mode is skill based and you choose when to collect your winnings.

1429 Uncharted Seas: 98.6% RTP

Thunderkick rates 1429 Uncharted Seas as low volatility. It plays on 5 reels and 25 paylines, with expanding wilds and free spins.

Marching Legions: 98.12% RTP

Relax Gaming’s Marching Legions pays on 243 ways, with nudges, a respin and collect feature, and free spins that grow wave by wave. It also has a bonus buy, priced at 120x the bet.

Money Cart: 98.00% RTP

Money Cart is the first game in a Relax Gaming series that now runs to Money Cart 4. Its rules cap any win at 20,000 coins, which equals 2,000x your bet.

Blood Suckers: 98.00% RTP, 96.01% at the Casinos We Checked

NetEnt’s Blood Suckers dates from 2009 and lists a win on 45% of spins. NetEnt publishes 98.00%, but every casino we checked that carries it runs a 96.01% version, so check the rules before you count on the higher figure.

Codex of Fortune: 90.2% to 98.0% RTP

Released by NetEnt in 2021, Codex of Fortune pays 90.2% to 98.0% depending on how you use its keys. Its rules say the 98% needs one strategy: save the keys you win in Fortune Respins and spend them in free spins once you hold 3 or more.

Why Most of the Highest RTP Slots Have Small Top Prizes

Five of the eight slots in our main table stop at 2,000x the bet or less. Mega Joker, joint highest at 99.00%, lists a top payout of just 200x outside its progressive jackpot.

A slot pays back its RTP through all of its wins added together. Every rare 10,000x hit uses up part of that return, so a game that gives back 99% without huge prizes has to pay it out as many smaller wins instead.

Jackpot 6000, Mega Joker and Blood Suckers came out between 2007 and 2009, and none lists a top payout above 900x the bet.

Two 98% Slots With a 10,000x Top Prize

Two slots in our main table go as high as 10,000x the bet, and both keep that prize for free spins:

What the Tradeoff Means for You

Choosing a 99% slot over a 96% one changes three things:

Highest RTP Slots You Can Play at Crypto Casinos

Seven of the eight slots in our main table are in the lobbies of the crypto casinos we checked. Only Mega Joker was missing from every one of them.

We searched each lobby for every slot on our list and checked the provider on each game page, because several casinos carry a different game under the same name:

Always check the provider’s name on the game before you rely on its RTP.

Which Top RTP Slots Each Casino Carries

The table shows which slots from our list each casino had in its lobby when we checked in November 2026. Each casino name links to our full review.

We then opened the rules of 22 of these games across the five casinos. Every Relax Gaming and Thunderkick slot showed the provider’s full figure, but Blood Suckers showed 96.01% at all three casinos that carry it, instead of the 98.00% NetEnt lists.

Enhanced RTP Versions at Crypto Casinos

Some casinos run versions above a slot’s usual RTP. The clearest example we found groups 37 Pragmatic Play slots under an enhanced RTP label and says those figures are exclusive to it:

The figures come from the casino’s own enhanced RTP page. An enhanced version only helps if the casino really runs it, so open the game’s rules and check the RTP line before you play.

Games That Pay Back More Than Slots

A few casino games pay back more than any slot on our list:

Our house edge chart by game and casino originals odds guide have the full figures, game by game and casino by casino.

If you play with a bonus, check its terms first, because some casinos block high RTP slots while a bonus is active, as our guide to how casino bonuses work explains.

Slots Other RTP Lists Get Wrong

Three slots that often appear on highest RTP lists carry a figure the provider does not support, or supports only for its best version:

Figures That Match No Version

White Rabbit Megaways is quoted at 97.24% to 97.77% elsewhere. Big Time Gaming’s own White Rabbit page lists 96.42%, and so do the game’s Help pages in real money mode, both overall and with the bonus buy.

Xcalibur is often listed at 98%, but World Match offers it in two versions, at 97.62% and 95.03%. Neither reaches 98%.

The Best Version Quoted as the Only One

Other lists give Jokerizer 98%, and Yggdrasil does offer a 98% version. It also offers versions down to 88.8%, and the casino decides which one you play.

That gap is large in money terms:

How to Check a Slot’s RTP Yourself

It takes a minute and no bet:

If the rules show a lower figure than a list promised, trust the rules.

A higher RTP lowers the cost of playing but never removes it, so set a budget before you start. Our page on setting limits and finding help covers the tools to use.

Once you know which slots to look for, our list of crypto casinos we have tested with real money shows the sites we have checked with real deposits and withdrawals.

Frequently Asked Questions