How to play keno
Keno starts with a blank card or screen showing the numbers one through eighty. You pick a set of them, called spots, anywhere from a single number up to a limit the operator sets, commonly somewhere between ten and fifteen. Once you’ve placed your stake, the game draws twenty numbers at random from that field of eighty, either by a physical ball machine in a hall or by a certified random number generator online.
The game’s roots run older than any other on this site, tracing back to a numbers lottery played in ancient China long before playing cards or roulette wheels existed. It reached the United States with Chinese immigrant communities in the nineteenth century, and the name “keno” itself is generally understood to have been adopted later, once American gambling laws that specifically targeted lotteries made the older “Chinese lottery” name a liability for operators offering the game legally.
Your result depends entirely on how many of your chosen numbers were among the twenty drawn, a count usually called your catches. The paytable, printed on the card or shown on screen before you play, sets a payout for each possible catch count at each spot size you might have chosen. Pick four spots and catch all four, for instance, and you’re paid at whatever multiple that specific paytable assigns to a four-spot, four-catch result; miss even one, and the payout drops sharply or falls to zero depending on the table.
There is no decision to make once the numbers are drawn. Keno has exactly one meaningful choice in the entire game: how many spots to pick, and against which paytable. Everything else, the draw itself, is pure chance with no further input from the player, which is part of why keno reads more like a numbers lottery dressed in casino furniture than like a card or table game.
Some operators also sell “way tickets,” pre-set combinations of several smaller spot groups bet together on a single slip, mostly a live-hall convenience for playing several combinations at once rather than a different underlying game. Online, the equivalent is usually just selecting several separate tickets in one sitting, which comes down to the same set of independent bets either way.
Two distinct formats exist side by side almost everywhere keno is offered. Live keno runs on a schedule, drawn in a hall or lounge, often shown on screens throughout a casino so players elsewhere can watch the same draw. Video keno runs on individual terminals or, online, on individual screens, drawn continuously and privately rather than on a shared schedule, and it tends to post a noticeably better return than its live counterpart.
The paytable and what it pays
Keno paytables vary enormously between operators and even between machines at the same casino, so no single table applies universally. What stays constant is the shape: payouts rise steeply with more catches, and the odds of a top-tier catch on a larger spot size are long enough that most of the paytable’s cost to the player sits in those rare, large payouts rather than in the frequent small ones.
| Spots picked | Typical catch needed for a payout | General shape of the odds |
|---|---|---|
| 1 spot | 1 catch | Roughly a 1-in-4 chance, small even-money-range payout |
| 4 spots | 2–4 catches | Payouts rise sharply from 2 to 4 catches; 4-of-4 is rare |
| 10 spots | 5–10 catches | A handful of low catches usually pay nothing; the top prize needs a long-odds full or near-full catch |
The exact numbers behind each row differ by operator and are printed on the specific paytable in front of you; treat the table above as the shape of the game rather than a number to bet against.
Basic strategy for keno
There is no strategy in keno in the sense the word carries in blackjack or three card poker, because no decision after the numbers are chosen changes the outcome. What the “strategy” for keno actually means is choosing the spot size and paytable that best matches what you’re playing for: more spots and a longer paytable for a shot at a large, rare payout, or fewer spots for a shorter, steadier run of smaller results. Neither choice changes the house’s overall cut of the money wagered, only how that cut is distributed across possible outcomes.
The one genuinely useful comparison is between paytables and between live and video formats, since the return posted on one keno game can be meaningfully better than another offering what looks, superficially, like the same bet. Reading the printed paytable before playing, and comparing it against a second machine or site if one is available, is the closest thing keno has to a skill.
The mistakes that cost the most
Treating keno as a game with hidden patterns, lucky numbers or numbers “due” to hit, is the most common and most costly mistake, because it leads players to chase specific combinations across many draws as though persistence changes independent odds. It does not; every draw is a fresh, unrelated event, and no history of past draws affects the next one.
The second mistake is playing keno at the pace of a slot machine, spinning through draws rapidly on a video terminal without registering how steep the house edge is per draw compared with a table game. Because individual bets are usually small, the speed of play, not the size of any single wager, is what does the damage to a bankroll over a session.
The third mistake is picking a large spot size purely for the size of the top prize without weighing how rare hitting it actually is. A ten-spot ticket’s advertised jackpot looks dramatic next to a one-spot ticket’s modest payout, but the odds behind that jackpot are long enough that most players who chase it are, in effect, buying a lottery ticket with extra steps rather than making a considered keno decision.
Variants and rule differences
Live keno and video keno are the two broad formats, and the gap between them, video generally returning more than live, is large enough to matter when choosing where to play. Within each format, paytables differ sharply between operators: some pay generously on mid-range catches and thinly on top prizes, others do the reverse, and a handful build in bonus multipliers or progressive jackpots that change the maths again.
Some online keno variants add features borrowed from slot machines, extra draws, multipliers, or a bonus round, layered on top of the base game. These are worth treating as distinct products with their own paytables and their own returns rather than assuming they behave like standard keno with extras bolted on.
Playing keno online in Ireland
Online keno runs as an instant, continuously-available RNG game rather than on the fixed schedule a physical hall’s live keno often follows, which makes it easy to play a large number of draws quickly if you’re not deliberately pacing yourself. It’s offered at several established online casinos, including partners reviewed on this site such as LeoVegas and 888casino, and reviewed sites like Slotbox and Mr Green.
Ireland’s online casino licensing under the Gambling Regulation Act 2024 is still ahead, with remote gaming licences expected in 2027, so today’s operators run on Malta or UK licences rather than an Irish one. Once the Act’s regime reaches online casino games, certain casino-style games are due a €10 maximum stake and €3,000 maximum win; keno’s fast, frequent-draw format is worth keeping in mind against a future limit shaped around exactly that kind of rapid play.
Bankroll and pace
Keno’s house edge is the steepest on this site, and its speed makes that edge matter more per hour than the headline percentage alone suggests. Video keno drawn every few seconds turns a 10% house edge, itself an optimistic figure for the format, into a meaningfully larger hourly cost than the same edge would produce at a table game dealt once every couple of minutes. Live keno’s slower schedule softens that a little, but its house edge tends to run higher to begin with.
Compare that with Pai Gow Poker’s 2.84% or even Caribbean Stud’s 5.22%, and it’s clear keno sits in a different category entirely: a game priced closer to a lottery ticket than to anything dealt at a table, and worth budgeting for accordingly rather than by habit carried over from slower games.
The house edge calculator lets you plug in a specific paytable’s edge, your stake and how many draws you expect to play, which is the only reliable way to see what a keno session actually costs, since the game’s headline edge range is wide enough on its own to be close to useless as a planning number.