A game of chance is any contest where luck, rather than a player’s skill or decisions, controls who wins. Under U.S. law, the game of chance definition rests on three elements that must all appear together: consideration (something of value risked to play), chance (randomness that influences the outcome), and a prize (a reward for the winner). When all three are present, the activity is regulated as gambling. The harder question — how much luck is enough — is answered by one of three legal tests, and the test your state uses can turn the same game from a legal pastime into a criminal offense.
The Three Elements That Define a Game of Chance
Remove any one of these and the activity generally falls outside gambling law.
Consideration is the stake. A buy-in, an entry fee, or a wager all qualify. Non-cash value can count too, as long as the participant is giving something up to play.
Chance means the outcome depends at least partly on randomness rather than talent or effort. How much randomness is required depends on which legal test a court applies.
Prize is something of value going to the winner. Cash, merchandise, gift cards, or any tangible reward satisfies this element.
Federal law reinforces this structure without taking over. The federal lottery statute, 18 U.S.C. § 1301, prohibits transporting lottery tickets and materials across state lines and defines the prohibited activity as a scheme “offering prizes dependent in whole or in part upon lot or chance.”1Office of the Law Revision Counsel. United States Code Title 18 – 1301 The Illegal Gambling Business Act, 18 U.S.C. § 1955, doesn’t define gambling at all. It defers to state law, criminalizing operations that violate a state’s gambling statute, involve five or more people, and run for more than 30 days or generate at least $2,000 in a single day.2Office of the Law Revision Counsel. United States Code Title 18 – 1955
Because the federal government largely leaves the definition to the states, the real action happens at the state level, where the three-element framework meets the tests that decide how much chance is enough.
The Three Legal Tests for Chance
States don’t agree on how to measure chance. Three tests dominate, and they produce different answers for the same game.
The Dominant Factor Test
This is the standard used by most U.S. jurisdictions. The question is whether luck or skill has more influence over who wins. If chance is the dominant factor, the activity is a game of chance.3UNLV Gaming Law Journal. What’s in a Game? A Test Under Which We May Call a “VGT” a Gambling Game is Not So Sweet
The hard part is measurement. Poker is the classic example. A strong player wins consistently across thousands of hands because skill compounds over time, but in a single hand the deal can override perfect strategy. Courts have split on whether to evaluate the game hand-by-hand or across sessions.
In United States v. DiCristina (2012), a federal district court in New York heard expert testimony that a player’s win rate had a statistically significant effect on results and concluded that poker was predominantly skill-based. The Second Circuit reversed in 2013, holding that the federal Illegal Gambling Business Act doesn’t require any skill-versus-chance analysis — the statute simply asks whether the activity violates state gambling law, and New York treated poker as gambling.4Justia Law. United States v DiCristina, No. 12-3720 (2d Cir. 2013)
Daily fantasy sports have become the modern test case. More than a dozen states have passed statutes classifying these contests as games of skill, concluding that research and lineup selection predominate over the randomness of injuries and performance.
The Material Element Test
A stricter standard used in at least seven jurisdictions, the material element test treats an activity as gambling whenever chance plays a “material” role in the outcome, even if skill technically has a larger influence.3UNLV Gaming Law Journal. What’s in a Game? A Test Under Which We May Call a “VGT” a Gambling Game is Not So Sweet
The practical difference matters. A game that’s 60% skill and 40% luck passes under the dominant factor test but can fail here, because that 40% luck component materially affects who wins. Some courts applying the test have gone further, holding that chance doesn’t have to be dominant or even significant — only more than incidental.
The Any Chance Test
The most restrictive standard. A small group of states, including Hawaii and Texas, treats the chance element as satisfied if any amount of luck affects the outcome.5Virginia Law Review. Reconsidering the Legal Definition of Gambling There’s no balancing. A 99-to-1 ratio of skill to luck still triggers the definition.
Courts in these jurisdictions have been explicit: what matters is the incorporation of chance, not the proportion. Only activities with zero randomness escape classification. A spelling bee or a foot race qualifies as pure skill. Most card games, board games, and competitive video games do not. If you’re designing a contest in one of these states, the practical answer is to remove the entry fee or the prize, because you cannot engineer your way around the chance element when any trace counts.
Pure Chance Games vs. Mixed Games
Games fall along a spectrum, and where a game sits determines how heavily it’s regulated.
Pure chance games give players no meaningful decisions. Lotteries, roulette, slot machines, and bingo all fit here. The outcome is entirely random, and these activities are regulated as gambling in every U.S. jurisdiction without exception.
Mixed games combine skill and randomness. Poker involves reading opponents, managing bets, and calculating odds, yet the shuffle still decides which cards appear. Bridge rewards partnership strategy against a random deal. Fantasy sports demand research but build in the unpredictability of injuries and weather. For these games, the applicable legal test does the sorting. The same poker game legal in a dominant factor state can be illegal next door under an any chance rule.
The classification reaches beyond criminal law. It controls licensing for operators, tax treatment for winners, and whether promotional activities like charity bingo nights or corporate sweepstakes need regulatory approval.
Social Games Among Friends
Many states carve out an exception for casual games among friends, even when all three elements are technically present. These social gambling exemptions typically require a private setting, equal footing among participants, and no profit to anyone running the game.
The “no house profit” requirement is where social games cross the line. Taking a rake from each pot, charging a cover at the door, or marking up food and drinks beyond normal prices can disqualify the exemption. The point is to separate a friendly poker night from an organized operation. The moment someone makes money by hosting rather than playing, the exemption disappears.
Specifics vary. Some states require a private home. Others cap the maximum wager or the total stakes. If you’re hosting a regular game with real money on the table, confirm your state’s version and make sure no one is collecting a fee for running it.
Sweepstakes, Lotteries, and Skill Contests
The three-element framework also governs promotional giveaways, and the dividing line between a lawful sweepstakes and an illegal lottery is the consideration element.
A sweepstakes awards prizes by chance but requires no purchase or entry fee to participate. A lottery awards prizes by chance and requires payment, which makes it illegal unless operated by a state government or an authorized charity.6United States Postal Inspection Service. A Consumer’s Guide to Sweepstakes and Lotteries To stay lawful, a sweepstakes must give participants an equal chance to win regardless of whether they buy anything. The “no purchase necessary” disclosure has to appear on entry forms and in the official rules, and the free entry path must offer the same odds as the paid path.
Skill contests work differently. When the winner is determined by ability — writing the best essay, solving a puzzle, answering trivia correctly — the sponsor can charge an entry fee because the chance element has been removed.6United States Postal Inspection Service. A Consumer’s Guide to Sweepstakes and Lotteries Judging has to be genuinely skill-based. A contest where a panel picks subjectively, or where luck plays any role, risks reclassification.
Tribal Gaming
The Indian Gaming Regulatory Act (IGRA) uses its own classification system, sorting games of chance into three tiers with different regulatory requirements.
Class I covers traditional tribal ceremonial games and is regulated exclusively by the tribes. Class II includes bingo (paper or electronic), pull-tabs, punch boards, tip jars, and certain card games authorized by state law. Class II excludes banking card games like blackjack and baccarat, and it excludes electronic slot machines.7Office of the Law Revision Counsel. United States Code Title 25 – 2703
Class III is everything else — slot machines, roulette, craps, blackjack, sports betting. Operating Class III games on tribal land requires a tribal-state compact. Without that negotiated agreement, the gaming is unlawful, and either party can seek a federal injunction to shut it down.8National Indian Gaming Commission. Indian Gaming Regulatory Act
Loot Boxes and the Digital Gray Zone
Video game loot boxes — randomized virtual rewards purchased with real money — fit the three-element framework almost perfectly. Players pay (consideration), receive a randomized item (chance), and the item has perceived or market value (prize). No federal law regulates or bans loot boxes as of 2026. State legislatures in New York, Hawaii, Washington, and Indiana have introduced bills to restrict them or classify them as gambling, but none have passed.
The FTC has taken enforcement action in specific cases involving deceptive practices, requiring odds disclosure, age verification, and improved parental controls. A federal court dismissed a class action against Google over Play Store loot boxes without reaching the gambling question, ruling instead on platform immunity. Without legislation or a definitive ruling applying a specific chance test, loot boxes sit in a gray zone where the three elements appear to be present but no court has formally said so.
Tax Treatment of Winnings
However your state classifies a game, the IRS treats all gambling winnings as taxable income. Every dollar must be reported on your federal return, even if the payer doesn’t issue a tax form.9Internal Revenue Service. Topic No. 419, Gambling Income and Losses
Payers file Form W-2G when winnings cross certain thresholds. For 2026, the general minimum reporting threshold is $2,000, now adjusted annually for inflation. For lotteries, sweepstakes, wagering pools, racing, and sports betting, the form is required when winnings minus the wager exceed $5,000 and the payout is at least 300 times the amount wagered. When that same $5,000 and 300-to-1 threshold is met, the payer must withhold 24% for federal taxes before paying out.10Internal Revenue Service. Instructions for Forms W-2G and 5754 (01/2026)
You can deduct gambling losses, but only up to the amount of your winnings, and only if you itemize. Keeping detailed records of wins and losses — dates, locations, amounts, and the type of game — is the only reliable way to support those deductions if the IRS asks.