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Guides in this section
Jackpot slotsHow progressive jackpots grow, the biggest US online wins and what a jackpot costs.New slotsHow a new slot reaches a US casino, and what to check before you play one.Megaways slotsWhat Megaways means, who owns it and why the number of ways changes each spin.Highest RTP slotsHow to find a slot's RTP, why it can differ by state, and how slots compare.SlingoWhat Slingo games are, who makes them and where they launched in the US.Slot providersWho makes online casino games, how they are licensed and how to check one.Where can you play online slots for real money?
At state-licensed online casinos in Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, Rhode Island and West Virginia, while you are physically in that state. See licensed online casinos and your state page. Sweepstakes casinos offer slot-style games in other states under a different model, and many states are acting against them.
How is a slot result decided?
A random number generator picks the result of each spin, and earlier spins do not change it. Michigan requires suppliers and platforms to meet GLI-19, a technical standard for interactive gaming, and each game needs written approval from the Michigan Gaming Control Board. See how games are tested.
What do RTP and volatility mean?
Return to player (RTP) is the share of money bet that a slot pays back over a very long run. Volatility describes how that money comes back: a high-volatility slot pays rarely but can pay large amounts, and a low-volatility slot pays smaller amounts more often.
Wizard of Odds gives Dead or Alive as an example, with an RTP of 96.82%, a 3.18% house edge, high volatility and a top prize of 12,000 times the bet.
How do slots compare with table games?
Slots usually cost more per dollar bet. These figures come from Wizard of Odds:
| Game | House edge |
|---|---|
| Blackjack, Atlantic City rules | 0.43% |
| Video poker, full-pay Jacks or Better | 0.46% |
| Roulette, double zero | 5.26% |
| Slots | About 2% to 15%, by game |
Table game figures assume best play. See the <a href="/games/">games hub</a>.
Does a slot pay the same everywhere?
Not always. Wizard of Odds notes that the RTP of a single title can differ from one jurisdiction to the next. Michigan requires house-banked games to return at least 80% unless the board authorizes otherwise. New Jersey's general internet gaming rule that we read sets no minimum payout. Check the help screen of the game you play.
What are the rules in your state?
Each state sets its own online casino rules. Pick a state to see its status, its regulator and the date we last checked it.
Read next: Jackpot slots
Sources
Checked November 5, 2026. Regulator rules were read through the sources listed, and they can change. How we research.
- Wizard of Odds: house edge of casino games compared
- Wizard of Odds: slots
- Mich. Admin. Code R. 432.633: technical standards (Cornell LII)
- Mich. Admin. Code R. 432.633b: game approval standards (Cornell LII)
- Gaming Laboratories International: GLI-19 version 3.0 release (July 20, 2020)
- N.J.A.C. 13:69O-1.2: general requirements for internet gaming (Cornell LII)