Slots are entertaining no matter the size of the prizes they award, but nothing compares to the thrill of chasing a life-changing jackpot. In some games, jackpots can swell to immense proportions, reaching seven- or even eight-figure amounts.
Known as progressives, these games offer enormous winning potential because every player who spins the reels adds to the prize pool with each wager. This collective effort can create life-changing jackpots like the one won by British player Jon Heywood. He earned a place in the Guinness World Records after winning £13.2 million on the Mega Moolah slot in 2015.
Not all progressive slots award such enormous sums, but even the chance to land a six-figure prize is enticing. Keep reading as we explore the different types of progressive slots, how they are won, who pays out the huge prizes, and what the real odds of hitting the jackpot are.
Types of Progressive Slots Based on Pool Growth
Let’s begin with a brief explanation of what a progressive jackpot is for those unfamiliar with the concept. Simply put, it is a pool of money that goes to the player who triggers the jackpot. This usually happens when you land a special combination of symbols, although the winning criteria differ between games, as you will see later. The jackpot is not a flat amount as it is in regular slots; instead, it grows continually.
The prize pool is built from the betting action of all participating players who wager on a specific slot machine. A portion of each player’s bet is subtracted and added to the constantly growing pool. This portion is usually around 1%, but the percentage varies depending on which slot you are playing. What remains of the bet is used as normal for the particular spin.
The jackpot starts growing from a specific seed amount contributed either by the casino or by the software provider supplying the game. Here is a breakdown of how this works.
- A software supplier contributes a starting seed of $1 million for one of its progressive slots.
- The minimum bet the slot accepts is $0.50.
- 1% is subtracted from each bet and added to the slot’s progressive pool.
- Half a cent of each minimum wager (0.50 x 0.01 = 0.005) goes toward the jackpot.
- Higher bets naturally have a higher contribution. A $2 bettor would contribute two cents per wager, and so on.
Only a tiny portion is deducted from qualifying bets, so how do the jackpots escalate to such heights? It’s simple. Progressive slots are aggressively marketed by casinos as games with enormous winning potential – and understandably so.
Because of this, casino-goers are drawn to progressive slots as flies are drawn to sugar. With so much betting action, it is only natural for the pools to grow to massive proportions, albeit in very small increments.
Once the jackpot hits, the casino resets it to the initial seed amount, and the accumulation starts all over again. It continues until another lucky player bags the progressive prize and resets it to the seed amount once more.
Progressive games like Mega Moolah feature jackpots with multiple tiers – the Mini, Minor, Major, and Mega levels. When one of the four is won, only that specific pool is reset to its seed amount, while the other three pots continue to grow from the amounts they have already reached. Now that we have gotten this out of the way, let’s examine the three types of progressive slots based on pool growth.


Standalone Progressive Slots
In standalone progressive slots, the pools are exclusive to a particular game and grow only from bets made on that specific machine. The jackpot meter does not tick unless a player is sitting at the machine and placing wagers.
Because only one person can feed the jackpot at a time, the pools grow at a significantly slower pace. The top prizes are smaller, usually no more than $10,000 to $20,000 or so. It all depends on when the pot last dropped.
Linked Progressive Slots
Linked progressive slots are more common and more popular than standalone ones. They are also known as proprietary or in-house slots. Several machines in the casino are linked and feed into the same jackpot pool.
The linked machines can offer the same game or different games. They can be connected within a single casino or across several establishments run by the same gambling company. With more players contributing to the pools, the prizes grow faster.
Wide-Area Progressive Slots
Wide-area progressive slots are where the life-changing pots drop. In 1986, IGT became the first manufacturer to launch wide-area progressive slots across land-based casinos.
The Mega Moolah online slot we mentioned earlier is another great example of a wide-area progressive. It is linked across all Microgaming casinos that feature it in their online lobbies, with hundreds of thousands of players feeding the pools with their bets.
With such high levels of participation, it only makes sense that the jackpot meters of wide-area progressives tick at lightning speed. The prizes literally grow by the second, and when the jackpot is reset to its base seed amount, all spinners instantly know that somewhere, someone has become a millionaire.
Top payouts run into the millions, but the odds of wide-area progressive pots dropping are astronomically small.
Types of Progressive Slots Based on Winning Criteria
Progressive slots can also be categorized based on their winning criteria. It is always a good idea to check the paytable beforehand to see what the qualifying terms for the jackpot are, because they can differ from one game to another.
Regardless of the criteria, the jackpot drop is always produced by a Random Number Generator that relies on complex algorithms. This makes it impossible to predict with certainty exactly when the huge prize will hit.



Symbol-Driven Progressive Jackpots
Symbol-driven progressive jackpots work like the payouts in standard slots with fixed jackpots. If you form a specific combination of symbols, the jackpot is yours. In some multi-tiered progressives, a given symbol combination unlocks a bonus game.
Entering this bonus game guarantees that you’ll walk away with one of several jackpot prizes. You may sometimes spin a bonus wheel, as is the case in Microgaming’s Mega Moolah. In some progressive slots, only maximum bets have a chance of triggering the jackpot.
Progressive Slots With a Boiling Point
Progressive slots with a boiling point award their top prizes whenever the pool reaches a predetermined amount. Winning conditions may differ, but the prize inevitably goes to the player who pushes the pot to its boiling point.
Suppose the jackpot “boils over” at $100,000 and the jackpot meter shows $99,999 on a slot with a minimum bet of $1. The person who wagers this amount or more on the very next spin will win the jackpot.
Slots With Randomly Awarded Jackpots
Slots with randomly awarded jackpots do not require players to line up matching symbol combinations to earn the biggest payout. Here, the Random Number Generator takes care of the job. The jackpot can hit at any time, on any spin, even on one that fails to produce a regular payout.
Bet size is irrelevant; you can win even with a minimum wager. That said, in some progressive slots your chances of winning the top prize increase proportionately to the size of your wager. The bigger you bet, the better the odds of scoring the jackpot. These conditions are all detailed in the game’s paytable, so always check it out before you hit the spin button.
Who Pays the Prize when a Progressive Jackpot is Won?
1Paid by the Software Studios
Progressive slots sometimes award millions of dollars, which naturally raises the question, “Who pays such massive sums to the lucky winners?” For online progressives, like those developed by Microgaming, NetEnt, and Playtech, the jackpots are typically paid by the software studios themselves. They also provide the seed amounts after the pools are reset.
This arrangement spares smaller online gambling operators from the enormous losses that would otherwise accompany such life-changing payouts. Additionally, wide-area jackpots are funded by players wagering at many different casinos, so it would be unreasonable to expect a single operator to cover a wide-area pot.
2Limits on Players' Withdrawals
Depending on where you play, the massive prize may be paid in a single installment, which is usually the case for land-based jackpot winners. However, online gambling operators generally impose weekly and monthly withdrawal limits to prevent money laundering.
The monthly limit typically ranges from $5,000 to $50,000, depending on the casino. With such restrictions in place, cashing out a seven-figure progressive jackpot can take years before the player finally receives the full amount.
3Exceptions for Progressive Payouts
That said, some gambling operators make an exception for progressive payouts and lift the withdrawal restrictions for jackpot winners, paying the entire sum in one installment. Microgaming-powered casinos that offer the Mega Moolah slot are among the examples.
If you are aiming for a progressive pot, you should carefully read your chosen casino’s terms and conditions to familiarize yourself with its withdrawal policies in such situations.
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Progressive Slots - Odds, Marketing, Wins and Taxes
More Likely to be Struck by a Lightning
Progressive Slots and Marketing
Progressive Slot Wins and Taxes
What about Slot Losses?
The odds of slots, including progressive varieties, are measured by their payback percentages, also known as the theoretical return to player (RTP). The RTP reflects the statistical average of all wagers the machine is expected to return to players over the long run.
This average is cumulative – that is, it is calculated over millions of spins and applies to everyone who bets on the respective slot. Because casinos run their games for profit, payout percentages are inevitably below 100%. In other words, slots carry a negative expectation for the player and will eventually eat up your bankroll.
The lower the payout percentage, the faster the game will devour your funds. Think of it like flipping a coin and betting on the outcome. With a fair coin, the odds of heads or tails are 50/50.
If you win a flip with a one-dollar bet but receive only ninety cents, the theoretical return of the game would be just 90%, giving a 10% statistical edge to the person paying you. Play this game long enough, and you are guaranteed to lose your money.
The house edge is built into all casino games, including progressive slots. It stems from the discrepancy between the true odds of winning and the odds the casino pays out for successful bets. The same principle applies to slots linked to progressive pools.
Such games offer attractive prizes, but this comes at the expense of lower player-return percentages. The RTP for regular payouts is reduced to compensate for the portion of each bet that feeds the jackpot. A game that would otherwise pay 97% might offer only a 95% or 94% return once the contribution to the progressive pool is factored in.
A game’s overall RTP assumes the player will occasionally win the progressive prize. However, the reels are weighted so that the actual chances of hitting the pot are astronomically small, even after countless spins.
If you never win the jackpot during your lifetime, the effective RTP drops even further. Mega Moolah, for example, returns a theoretical average of 88% in the base game, but the figure exceeds 96% when the jackpot is included.
Some people say winning a progressive prize is akin to a lightning strike. In reality, you have better odds of being struck by lightning than of winning a progressive jackpot. According to National Geographic, the probability of being struck by lightning in the United States in any given year is 1 in 700,000, while over an entire lifetime it is 1 in 3,000.
For comparison, the probability of winning the progressive jackpot in IGT’s Megabucks is roughly 1 in 50 million spins. A player would need an enormous bankroll to withstand such devastating variance when chasing a six- or seven-figure prize.
Last, but certainly not least, progressive slots do not get “hot” or “cold,” as some players assume. No betting system or strategy can increase your chances of pocketing the big prize. The odds of collecting that coveted oversized check remain the same on every spin.
The jackpot is never “due” to hit, no matter how large it has grown (unless it has a built-in boiling point, of course). A progressive machine does not go cold just because it recently awarded its top payout, and the opposite is equally true.
View more...There is an interesting correlation between how casinos market their games and the payout percentages of those games. As a general rule of thumb, titles with low house edges and high player returns – such as craps, baccarat, and blackjack – are seldom featured in promotional campaigns.
Larger casinos may run dozens, even hundreds, of these tables, but they rarely, if ever, highlight them in their advertising. From an operator’s standpoint, table games are simply less profitable and therefore not worth the marketing effort.
The situation is entirely different with progressive slots. Jackpot winners are always prominently showcased in promotional materials and serve as bait to attract unsuspecting players. The same strategy is employed in both online and land-based casinos, which proudly trumpet the huge wins of progressive-slot players to lure new patrons.
The bottom line: gambling operators are quick to publish press releases about progressive winners, but you can be certain the games they promote most aggressively are heavily tilted in the house’s favor.
View more...One important thing to remember is that gamblers owe taxes on larger winnings in some jurisdictions, including the USA.
In Nevada, for instance, the IRS (Internal Revenue Service) requires gambling operators to withhold taxes when a player wins more than a certain amount, with the rate ranging from 25% to 30%.
Whether the winner is a U.S. citizen or a foreign national also matters. The rate drops to 25% when winnings exceed $5,000.
If your profits surpass the stipulated threshold, the casino will ask for your Social Security Number (SSN) or Taxpayer Identification Number (TIN). You will then receive a W-2G form indicating the amount won and the tax withheld.
At the end of the year, the winner must file a 1040 form with the IRS to report their annual income. Gambling profits are considered taxable income in the United States, but only if they exceed $1,200.
This threshold applies only to winnings from slot machines and bingo. Minimum taxable amounts differ for other forms of gambling – keno ($1,500+), poker ($5,000+), and horse-track betting ($600+).
Table games such as blackjack and roulette are different because casinos find it harder to track the amount you buy in for. Consequently, it becomes difficult to determine your precise taxable gain, i.e., your net winnings.
This ambiguity leads some table-game players to skip reporting small-scale profits. Our advice to U.S. slot players is to declare every dollar of gambling income to the IRS, whether it is $500 or $50,000. The IRS rarely hunts down small winners, but you still do not want to risk tax evasion.
Across the pond, in countries like the UK, all casino goers – including slot players – are exempt from taxes on their gambling profits, regardless of whether they win £100 or £13 million.
In the UK, winnings from all forms of betting are not considered taxable income for either casual players or professionals. Only UK-licensed gambling operators are required to pay annual taxes to the country’s budget.
View more...But there is a silver lining: U.S. slot players have the legal right to deduct some of their gambling losses. The procedure differs for recreational and professional gamblers.
The catch is that you cannot claim a deduction if your gambling losses exceed your winnings. The two must be reported separately to the IRS; you may not simply subtract your losses from your winnings and report the net amount.
Losses are not deductible if you have not reported any gambling income. From the IRS’s perspective, allowing such a deduction would essentially subsidize the taxpayer’s gambling activities.
Needless to say, you are expected to keep meticulous records of your bankroll. As proof, you should itemize and retain betting tickets, bank statements, withdrawal slips, W-2G forms, and similar documents.
For professional gamblers, losses are treated as business expenses. Remember, a professional gambler is someone whose primary objective is to earn a profit from gambling – that is, betting constitutes their main source of income.
To be considered a professional, you must engage in gambling activities continually and with regularity. Sporadic, casual play does not qualify as a business venture.
View more...Things to Consider when Looking for Value in Progressive Jackpot Slots
As we already explained, slots with progressive jackpots have lower return percentages to compensate for the amounts deducted from bets to fuel the prize pools. However, this does not mean it is impossible to find value in such games.
Some inexperienced players try to uncover that value by evaluating how “cold” or “hot” a given machine is. In their eyes, a slot that has paid a big progressive jackpot only recently is a total waste of time because it is unlikely to spew another huge amount of money so soon.
There is no logic in this reasoning, though. It is irrelevant to the Random Number Generator when the game last paid and how much. Below, we offer you several smarter ways to assess a progressive slot’s value and find decent games.



Hit Frequency of the Jackpot
The hit frequency of the jackpot can be used as a reference point because it gives you a rough idea of the average wait time between jackpot drops. There are specialized websites with jackpot trackers for progressive slots where you can find reliable information about the average time between wins.
You will notice an interesting correlation with multi-tier slots in particular. The games are designed so that smaller jackpots drop with a much higher frequency than the largest prizes. For example, the Mega jackpot in Mega Moolah drops once every eight weeks on average, while the smaller Major pot hits roughly once every forty hours.
By contrast, RealTime Gaming’s Aztec’s Millions is a real devourer of cash. Its jackpot hasn’t been won even once in the past ten years.
Average Jackpot Payout
The average jackpot payout is also important because it can indicate how often the huge prizes drop. There is a correlation between the average progressive pot’s size and its average hit frequency.
While multi-million jackpots drop rarely, games with smaller progressive prizes tend to pay more frequently. For example, Playtech’s Jackpot Giant pays out roughly once per year, but the average win is quite substantial at $5.8 million. Meanwhile, Microgaming’s Wow Pot offers a significantly smaller average prize of around $13,370 but pays roughly once every two weeks.
Break-Even Points of Progressive Slots
It is possible to find a positive expected value in slots, but you need to know their jackpots’ seed amounts and break-even points. A progressive machine begins to yield a positive expectation after its top prize exceeds a certain threshold, causing its RTP to jump above 100%.
Such a game would allow the player to gain an advantage over the house at a specific point. If you have information about variables like the game’s break-even point, its house edge, true odds, and jackpot contribution, you can calculate your edge. This is theoretically possible, but such information is extremely hard to come by.