Which UK Online Slots Have The Biggest Max Wins in 2026?

Sami Kurvinen

Last updated: 05 January 2026

33 minutes

Are you looking for online casino slots that can deliver the biggest x wins possible?

Then you have arrived at the correct destination, where you will find the updated list of online slots where you can win the absolute biggest wins.

All these slots are ultra-highly volatile, meaning that most players will lose their money, but a lucky few might walk away with massive wins instead.

This list is for you if you are ready to gamble and take more risks than you would on an average online slot.

Play High Max Win Slots In These Top-Rated UK Casinos

You can play slots with the highest maximum wins in licensed UK Casinos.

With bet ranges from as low as 10p to the maximum bet of £5 per spin (£2 for players between 18 and 24), these high-risk, high-reward slots can be played by recreational and experienced players.

We have carefully selected these outstanding online casinos for UK slot players.

Top 5 Biggest Online Jackpots Ever Won

Before we dig into the Top 10 highest max win slots, we need to look at the biggest max wins ever won online from casino slots.

As you might have guessed, the biggest all-time slot wins come from progressive jackpot slots.

Progressive jackpots grow in size until they are won and start over from a beforehand decided seed amount.

The more time between the main jackpot payouts, the bigger the jackpot will grow.

A percentage of each player’s bets are dedicated to the progressive jackpots until it’s won.

These are the Top 5 biggest online jackpots won until October 2023:

5. Mega Fortune – €17.8 million – 2013

Mega Fortune has lost some glamour over the years as other jackpot slots like Dream Drop Jackpots have taken over the shine and interest of players. Still, in 2013, the jackpot was running hot when a Finnish player managed to win the Mega Jackpot of €17.8 million.

His bet size? €0.25 per spin.

Here is a video of the occasion. What an unreal feeling that must have been for the winner:

4. Mega Moolah – €18.4 million – 2015

Mega Moolah by Game Studio Microgaming is probably the most famous jackpot slot around, and the reason for that is the vast amounts it has paid out to lucky winners over the years.

In 2015, a British war veteran was spinning away on the Mega Moolah slot with spins of £0.25 when luck struck through his device as he landed the Mega Jackpot and won £16 million.

3. Mega Moolah – €18.9 million – 2018

In 2018, the Mega Moolah Mega Jackpot had grown to unseen levels, and jackpot players worldwide aimed to be the lucky winner.

We don’t know much about the winner as they decided to remain anonymous, but we know that it was another winner from the UK and that the €18.9 million win came from a £0.60 bet after less than 50 spins.

2. Mega Moolah – €22.2 million – 2021

In 2021, it was time again as the Mega Moolah Mega Jackpot had grown to a record amount.

The €22.2 million winner comes from Belgium and is the current record holder of the biggest online jackpots ever won. But… there is a BUT… we have another online casino jackpot that will squash that record anytime soon.

1. WowPot! – $42.1 million – 2023

In February 2022, Microgaming released their WowPot Jackpot slots.

This jackpot starts at £2 million and is shared by many slots, including Book of Atem, Sisters of OZ, Queen of Alexandria, and more.

No limit exists on how big this jackpot can grow before it’s paid out.

On December 20th, 2023, a lucky player finally won the Guinness record-breaking jackpot of $42,149,180 on WowPot Wheel of Wishes.

The random number generator did well for this player, don’t you agree?

This is the biggest win ever won on online slots until now, and it smashed the previous record!

We are confident we will see more of these life-changing big wins from Wowpot jackpots in the future, as they are trendy and grow fast.

You can find these WowPot Jackpot slots in leading online casinos like Quickbet and Pub Casino.

Top 10 Casino Slots Online With The Highest Max Wins in The UK (Excluding Jackpot Wins)

Some of the slots in this Top 10 list are among the most famous online casino slots ever released, while others might be new and a surprise to you.

A few of the highest-x-win slots are sequels to previous popular slots but with boosted max wins, as recent trends suggest that highly volatile slots with high max wins are more popular than low-volatility slots with low to medium-sized wins.

In this top list, you will find slots from the most popular game providers like Nolimit City, Big Time Gaming, NetEnt, and Relax Gaming.

The themes will vary from the Wild West and outer space to prison cells, but one thing these slots have in common is that you can win insane amounts of money.

Where the Return To Player (RTP) percentages vary, CasinoWizard guides you toward online casinos that offer their players the best-paying versions so that you always play with the highest possible odds.

When playing these slots from the UK, you can start playing at 10p – 20p per spin, rising to a maximum of £2 per spin when aged 18-24 and £5 per spin when aged 25 or older.

10. San Quentin xWays (Nolimit City) – Max win: 150,000x stake

San Quentin xWays from 2021 is an award-winning slot from the popular and controversial game provider Nolimit City.

The max win potential is capped at 150,000 x, and you can start spinning with bets from 20p.

Nolimit City has released various RTP versions of San Quentin xWays, where the best version pays an average RTP of 96.03%.

Follow CasinoWizard’s guidance and choose your online casino wisely to ensure you play with the best possible odds.

The biggest wins can be won from the Free Spins, specifically the Lockdown Spins.

You can either give yourself the possibility to reach these spins by landing three or more Scatters or by buying the Free Spins in countries where it is allowed. Bonus Buys are not permitted in the United Kingdom.

9. Money Train 4 (Relax Gaming) – Max win: 150,000x stake

Relax Gaming released the grand finale of the Money Train series in September 2023.

Not only were the graphics and features updated in Money Train 4, but Relax Gaming also boosted the max win potential to 150,000 times the bet, making it the slot with the highest max win potential of all Money Train slots.

This slot is an excellent ending to one of the most successful slot series ever released and received an unusual 5-star rating by the CasinoWizard.

8. Fireworks Megaways (Big Time Gaming) – Max win: 150,335x stake

The first Big Time Gaming slot in this top 10 list is Fireworks Megaways, released in 2024.

As the title indicates, it is the fireworks that will make or break your session in this slot, as they are crucial to reaching the bigger wins. The max win is 150,335x the bet.

It is, in many ways, a typical Megaways slot, but the fireworks feature gives the game a fresh and interesting take.

7. HippoPop (AvatarUX) – Max Win: 157,590x stake

Game studio AvatarUX (in cooperation with Yggdrasil Gaming) has released several slots with their innovative PopWins feature. Still, only one can beat HippoPop’s max win potential of up to 157,590 x your stake.

The RTP averages a 96.10% payout when playing on the best RTP version.

The PopWins mechanic increases the rows’ heights after each consecutive win and triggers the Free Spins once all reels have reached six rows high.

During the bonus game, you play with an increasing multiplier and hippo multipliers, while the ways to win can expand to 65,536 ways.

6. Vegas Megaways (Big Time Gaming) – Max Win: 172,310x stake

Vegas Megaways from 2022 is the second entry on this list from Big Time Gaming and the highest overall paying Megaways slot ever created, as it´s possible to walk away with a 172,310 x stake win.

The RTP average is a 96.30% payout long-term.

Vegas Megaways is essentially a reskin of the studio´s Who Wants to be A Millionaire Megaways slot (due to copyright issues), including the same gambling elements and features but with a max win cap on steroids fitting the Vegas branding on this version.

5. MonkeyPop (AvatarUX) – Max Win: 197,500x stake

AvatarUX has released another PopWins slot with enormous win potential, as MonkeyPop from 2022 can deliver wins of up to 197,500 x your bet per spin.

The RTP average has a payout of 96.33% when playing on the best RTP version of MonkeyPop.

In this Asian-themed slot, you aim at reaching the Free Spins, which hit approximately once in every 300 spins on average, by landing three or more bonus symbols on the screen.

Before the bonus game begins, you are rewarded with several starting Free Spins, starting ways, starting multipliers, and multiplier growth.

4. San Quentin 2: Death Row (Nolimit City) – Max win: 200,000x stake

In September 2024, fans of the original San Quentin Xways were excited when Nolimit City released the sequel San Quentin 2: Death Row.

NLC did not hold back on the max win potential as it’s capped at 200,000x the bet.

The max wins probability in San Quentin 2: Death Row is 1 in 1.5 million spins compared to 1 in 1.8 million spins in San Quentin xWays.

The free spins are your chance for the big wins, and these trigger, on average, 1 in 299 spins.

Creating a sequel to such a legendary slot is no easy task, but Nolimit City pulled it off in style. They kept what made the first version fun while adding a few new tweaks.

3. Starburst XXXtreme (Netent) – Max win: 200,000x stake

What do you do when you launch a sequel to one of the most iconic and played online slots ever?

NetEnt decided to launch it as the highest max win potential slot.

When Starburst XXXtreme was launched in 2021, it became the highest-paying online slot ever, offering a max win of up to 200,000 x your bet size.

The top RTP version averages a 96.45% payout.

As in the original Starburst, the wilds play a crucial part in the game. However, in this sequel, some crazy multipliers of up to x150 were added.

Some countries allow a bonus buy option (Not available in the UK) where you can buy one Starburst wild for 10x your bet or two wilds for 95x your bet size.

2. Tombstone RIP (Nolimit City) – Max win: 300,000x stake

The previous record didn’t last long as the king of highly volatile slots, Nolimit City, released Tombstone RIP in 2022 with a max win potential of 300,000 x your bet and smashed the previous record holder.

There are two separate RTP versions available.

The highest RTP averages a 96.08% payout, while some casinos have offered their players the 94.08% RTP version.

Note that this game includes some graphical elements that some players might find offensive, so some casinos have decided not to offer this slot to their players. Maybe the insanely high win potential scared some casinos off as well.

It’s possible to win the max win in both the base game and the Hang ’em High Free Spins.

While the odds of getting the max win in the base game is about 1 in 130 million spins, the chance increases in the Hang ’em High bonus game to 1 in every 1.36 million spins.

Tombstone RIP, and the theme is brutal as most players will walk away with nothing, but a lucky few might cash in some massive wins.

You have been warned!

1. Tombstone Slaughter El Gordo’s Revenge (Nolimit City) – Max win: 500,000x stake

Hold on, as a new sheriff is in town regarding slots with the biggest max wins!

In January 2025, Nolimit City decided it was time to break some new records and released Tombstone Slaughter El Gordo’s Revenge.

The max win potential? 500,000x the bet.

Yes, that is a win of 1 million when betting with a £2 bet per spin. Absolutely insane, but your max win chances are, of course, slim as the max win probability is 1 in 189 million spins.

Tombstone Slaughter El Gordo’s Revenge isn’t as graphically violent as Tombstone RIP, but otherwise, the resemblance is unmistakable, as this isn’t a joke either. No cute puppies or candy are found in this online slot.

What you find is a hypervolatile game rated 12/10 on the volatility scale. It offers a superb soundtrack and very entertaining features. The question is whether you experience them before your money runs out.

Keep an eye on the max win probabilities

We all dream of big wins, but some online slots offer better max win probabilities than others.

Wait a minute. What are max win probabilities, anyway?

Head over to our max win probability explained article, where we give you all the details with examples and lists of popular slots. We also give you details of the slots to avoid if you aim to bag a max win when playing online slots.

What is the best way to win big on slots?

Unfortunately, it is impossible to always win on slots. It’s all down to catching the random number generator at the right place and time. In other words, it is down to pure luck. However, you can do some things to nudge your luck in your favour.

Here are our tips to win big on slots:

• Responsible Gaming before anything else: take action when you feel gambling is becoming a problem for you.
• Always (always!) play high payout slots, also known as high-RTP slots.
• Choose the right variance slot to suit your risk profile (low, medium, or high).
• Check our slot reviews to find out the max win probability. Some slots offer far better chances of landing the max win than others.
• Set clear max loss and win targets and stop when you reach either of those targets.
• Stay clear of fake slots, as they will have lower RTPs than advertised in their game rules.
• Avoid land-based slots like the plague. Slots in brick-and-mortar casinos have abysmal payout rates.
• Never play progressive jackpot slots. You will never win the big jackpots, and a huge chunk of the RTP goes towards funding them.
• Play Bonus Buy Slots. This type of slot can eat up your balance fast, but gaining direct access to bonus rounds substantially increases the odds of hitting a max win. Only play these if you can afford them.
• Because many players try out all the newest online slots, it often seems like new slots give out more big wins than older slots. This is just an illusion. You will see more max wins when more people play a particular slot. As soon as interest in a slot starts to dwindle, fewer people are playing,6 and the number of maximum wins will decrease.
• If you are more into a relaxing, social, slot-playing experience instead of chasing big thrills, live slots were made for you.

Conclusion: the best slots for big wins are out there, but you must do homework to find them and know which to avoid.