Record Online Slot Jackpots and How a Progressive Is Funded

The Record, as a Record Keeper States It

Guinness World Records holds a title for this. Its entry reads: "The largest jackpot payout in an online slot machine game is €17,879,645 ($20,062,600, £13,209,300), won by Jon Heywood (UK), playing Microgaming's Mega Moolah on Betway's website, on 6 October 2015." The same entry describes the game — "Mega Moolah is a five reel, twenty-five payline online slot game." — and notes how the figure was arrived at: "The total progressive jackpot from playing a single round of the game was initially paid in Pound Sterling and was converted in Euros as of 6 October 2015."

That is a record for a pooled progressive. Guinness keeps a separate category for jackpots funded from one operator's players alone, and the entry there reads: "The largest jackpot payout in a non-pooled online slot machine game is €8,636,041.54 (£7,321,810, $11,107,900), won by an anonymous player in Finland, playing the 'Arabian Nights' game on Paf.com, on 23rd November 2012." For comparison, the land-based record it lists is older and larger: "The largest slot machine payout is $39,713,982.25 (£25,361,761) won by a 25-year-old software engineer from Los Angeles after putting in $100 (£64) in the Megabucks slot machine at the Excalibur Hotel-Casino, Las Vegas, Nevada, USA on 21 March 2003."

Each of those is a single dated event with a named record keeper behind it. Nothing in them says anything about what any other player's next spin will do.

A Progressive Jackpot Is Funded by Play

The money in a progressive jackpot comes out of the stakes, and a regulator requires the operator to say so. The Gambling Commission's remote technical standards require that "An explanation of the jackpot rules must be clearly available to the customer before they commit to gamble.", and the implementation guidance states that "The rules for a jackpot shall describe how it is funded, what the start-up seed and any ceiling values are." The jackpot is also part of the game's return, not an extra on top of it: "The jackpot system's return to player percentage should be displayed as per RTS 3C, this could be one combined game and progressive jackpot RTP figure or broken down into the base game and jackpot component."

Contribution and eligibility are linked, and the guidance says that plainly: "Where a customer contributes to a jackpot pool, that customer should be eligible to win the jackpot whilst they are playing that game." and "The chances of winning a jackpot should increase in correlation with the amount contributed." Read together with the funding rule, those sentences describe a prize pool built from money staked, on a game where staking more buys a larger share of the chance at it. Not a windfall from outside the game.

The information a player is owed before staking is specified too: "For each virtual event, game (including bingo), or lottery, information that may reasonably be expected to enable the customer to make an informed decision about his or her chances of winning must be easily available before the customer commits to gamble." Among the items that must be available is "the average theoretical return to player percentage."

What a Return Figure Does and Does Not Promise

The Gambling Commission's consumer guidance on this is written about gaming machines rather than online slots, and it is quoted here as what it is. On the meaning of a return figure: "The %RTP is an average achieved over a significant number of game plays and not each time the gaming machine is played." On how not to read it: "If a gaming machine displays an 85% RTP, you should not expect to win an average of 85 pence for every £1 you stake during a playing session." On what the operator keeps: "This is called the house edge, and it gives a measure of the percentage that a casino would expect to keep, on average, from each hand or spin, given normal patterns of play." And on the idea that a long dry spell makes a jackpot due: "The odds of achieving a win in the current game remain constant and are not affected by wins or losses in previous games."

That last sentence is the one that matters most on a page about a record jackpot. A progressive meter climbing does not shorten anyone's odds; what changes the chance of winning is the amount contributed, and contributing more means staking more. A player's decisions can reduce a house edge and never eliminate it, and on a slot there are no decisions to make.

If Gambling Is Causing Harm

The NHS publishes a self-assessment and states that "Treatment and support groups are available if gambling is causing problems for you." and that "You can self-refer to a gambling clinic near you." It gives the National Gambling Helpline number as 0808 8020 133, free, 24 hours a day, seven days a week. In the United States the National Council on Problem Gambling runs the National Problem Gambling Helpline on 1-800-MY-RESET.