The Largest Slot Machine Winning Jackpot

The world record for the largest slot machine winning jackpot stands at a mighty €38,461,200. The prize fund was won on 20th December 2023 on Wheel of Wishes, an online slot machine from the WowPot series.

WowPot Winner - The Largest Slot Machine Winning Jackpot

This incredible record win, which amounts to over $42 million at today’s exchange rate, will certainly be hard to beat.

Historically, of all the crazy jackpots won on slot machines, it has been a long time since a prize fund of this magnitude had been won. Indeed, previous world records date back to the period between 1998 and 2009. During this time, players enjoyed huge jackpots on the iconic Megabucks slot machines, in Nevada (US), Las Vegas and Reno casinos.

Biggest Megabucks Slot Machine Wins

  • $39,713,892 – Won on 21st March 2003 at the Excalibur Hotel Casino in Las Vegas.
  • $34,955,490 – Won on 26th January 2000 at the Desert Inn. The Desert Inn closed in August 2000, and the Wynn and Encore has now taken its place.
  • $33,000,563 – Won on 12th April 2009 at the Rail City Casino in Reno.
  • $27,580,878 – Won on the 15th November 1998 at the Palace Station Hotel in Las Vegas.
  • $22,621,229 – Won on the 27th May 2002 at Bally’s in Las Vegas.


Historically, Megabucks games were the first progressive slot machines. In 1986, it was the IGT company that launched this new concept state side. Megabucks are iconic games but can only be played in casinos in California and Nevada.

Originally, the value of the Megabucks mega jackpot up for grabs started at $1 million. In 2005, with the growing success of Megabucks, the IGT group increased the jackpot to $10,000,000.

Internet Jackpot Slot Machines

Since the first progressive jackpot slot machines were launched online, hundreds of players have won prizes of more than a million dollars. Among the biggest record winning jackpots, the most impressive were seen on the Mega Moolah and WowPot slot machine series.

Top 10 Winning Slot Machines

#1. 20 Dec. 2023 N/A €38,461,200
The Largest Slot Machine Winning Jackpot! All we know about this world record is the date of the win, and the name of the slot machine on which this feat took place – Wheel of Wishes. The winning player chose to remain anonymous. As a result, no additional information was able to be disclosed to the general public.

#2. 30 Jan. 2019 Zodiac Casino CA$20,059,287
The largest jackpot won at online casinos open to the Canadian market. This staggering jackpot was won on the Mega Moolah slot machine.

#3. 27 Apr. 2021 Napoleon Games €19,430,723
The largest jackpot won at a European online casino. This crazy prize was won on the Absolootly Mad slot machine, a quirky variant of the Mega Moolah series.

#4. 28 Sep. 2018 Grand Mondial €18,915,872
One of the many prizes won on the Grand Mondial Casino site, a well-known games room to progressive video slot machine fans. The jackpot was won on the original Mega Moolah saga slot machine.

#5. 13 Apr. 2021 £15,183,085
The record for the largest jackpot won by an English slot machine enthusiast. It was on the Book of Atem WowPot game, featured on the site, that the luckiest player in England hit the jackpot.

#6. 5 Apr. 2020 Jackpot City CA$16,496,347
This jackpot, won by a Canadian, is one of countless millionaire jackpots won on the Jackpot City Casino site. The prize fund was won on the Mega Moolah slot machine.

#7. 17 Aug. 2020 Lucky Casino €14,239,532
Here, a Swedish player was the lucky jackpot winner. Once again, this feat was achieved on the original Mega Moolah slot machine. In Sweden, progressive jackpot slot machines are extremely popular on the Internet.

#8. 8 May 2020 River Belle NZ$13,615,861
The largest jackpot won at online casinos in New Zealand. This record was achieved on one of the Mega Moolah network slot machines. Among the most frequent wins on slot machines known for big payouts, New Zealanders often make the headlines.

#9. 24 Dec. 2023 €13,528,145
It was on the recent Book of Mega Moolah slot machine that a customer won the jackpot with a bet of just €20.

#10. 6 Oct. 2015 £13,213,838
This huge jackpot was won with a bet of just 25 pence. The winner was a Brit! Jon Heywood, the lucky player who placed the bet, had his winning record entered in the Guinness World Records.

Winners in the UK

It is not in UK land-based casinos that record-winning slot machine jackpots are won! Indeed, the United Kingdom Gaming Commission imposes strict limits on bets and prize pool values in play. In some UK casinos, the largest jackpots at stake amount to just £20,000. If you want to try your luck on these games, maximum bets are limited to £5 per spin.

As for Internet gambling offers, there are surprisingly no limits on the jackpot values up for grabs. However, in order to prevent any risk of significant financial losses to vulnerable players, betting option limits are put in place. In addition, when players bet large sums of money, casino site operators have an obligation to check whether the players concerned are not victims of a gambling addiction. These limits and controls were put in place in 2020.

Try Your Luck

To try your luck on online slot machines offering the chance to become a millionaire, there’s plenty of choice out there. If you’re in the UK, we highly recommend Zodiac Casino. Among all the online casino sites in the UK, Zodiac Casino really stands out. By becoming a games room customer, you’ll be able to take advantage of a free spin offer on one of the Mega Moolah series of slot machines.

If you’re looking for an alternative,, a site where you can try your luck on WowPot slot machines, a welcome bonus offer is up for grabs.

Winning Odds and Budgets

Progressive slot machines offer good winning odds, but it’s not that easy to win the jackpot. These games attract many fans looking to win a record jackpot; however, you need a lot of luck on your side.

The Mega Moolah and WowPot slot machine games publisher does not provide official information on the winning odds. However, based on expert field knowledge, it is possible to make some rough calculations. For example, by opting for bets of £1 per round, the chances of winning the jackpot would be approximately 1 in 50 million. Obviously, if you roll 100 successive spins, you will be 100 times more likely to hit the jackpot.

Betting tips can greatly improve your chances of winning big on slot machines. Typically, by opting for the Mega Moolah slot machine, and making bets of £6.25 per spin, you’ll already be improving your chances. All the same, be careful! No betting strategy is foolproof. Additionally, even if you bet big on a large number of spins, good results are by no means guaranteed.


Previous article

€13.5 Million Won on