Slot Machine Payback Laws by State: Minimum RTP Data

Every US state that licenses commercial slot machines sets a legal floor on how much those machines must pay back to players over time. These slot machine payback laws are among the most cited and least understood rules in gambling regulation. Players often assume the legal minimum is what casinos actually offer; in practice, real-world returns sit well above the statutory floor. This reference compiles the minimum return-to-player (RTP) requirements written into state statutes and regulations, links each figure to its primary legal source, and compares those floors with the payback casinos actually deliver according to regulator data.

Each figure below is taken directly from the cited statute or administrative code section rather than from secondary lists, which frequently repeat outdated numbers.

Key Findings

Statutory slot payback minimums in the states reviewed range from 75% in Nevada to 89% in Maine. The most common floor is 80% (Colorado, Iowa, Indiana, Missouri, Mississippi, South Dakota and Massachusetts). Actual returns are far higher: Pennsylvania slots paid back about 90.2% of wagers in fiscal 2024-25, and Nevada's statewide slot hold of 7.1% in 2025 implies roughly 92.9% returned, about 18 points above that state's legal minimum.

Minimum Slot Payback Percentage by State

The table lists the legal minimum theoretical payback for commercial (non-tribal) slot machines in each state we verified against primary sources. "Theoretical" means the long-run mathematical return built into the game's design, not a guarantee for any session.

State	Legal minimum payback	Maximum / notes	Primary legal source
Nevada	75%	Lowest floor in the US	Nevada Gaming Commission Regulation 14.040(1)(a)
Massachusetts	80%	Raised from the 75% GLI-11 default	205 CMR 143.01
Colorado	80%	Maximum 100% (tournament exception)	C.R.S. § 44-30-813
Iowa	80%	Maximum 100%	Iowa Admin. Code r. 491-11.9(1)(a)
Indiana	80%	Exceptions require executive director approval	68 IAC 6-29
Missouri	80%	Measured over 10 million handle pulls	11 CSR 45-5.190(1)
Mississippi	80%	—	Mississippi Gaming Commission regulations
South Dakota	80%	Per credit played; no maximum stated	SDCL § 42-7B-36
New Jersey	83%	Applies to each slot game requiring a wager	N.J.A.C. 13:69E-1.28A(a)
Pennsylvania	85%	At lowest wager; 100% cap at highest wager	58 Pa. Code § 461a.7(a)
Ohio	85%	Specific rate approved by the commission	Ohio Rev. Code § 3772.20(D)
Maryland	85%	Per VLT since July 1, 2021 (previously 87%)	Maryland Dept. of Legislative Services (VLT payout report)
Kansas	87%	Average over the life of the machine	K.S.A. § 74-8749(a)(1)
Maine	89%	Daily aggregate across each facility, measured quarterly	8 M.R.S. § 1020(2)(G)

Sources: state statutes and administrative codes as linked in the Sources section. Louisiana's land-based casino statute (R.S. 27:355) requires the same minimum winning percentage as the state's riverboat slots; tribal casinos follow compact terms not covered here.

Ranked from most to least player-friendly floor

1. Maine — 89% facility-wide daily aggregate
2. Kansas — 87% over the life of each machine
3. Pennsylvania, Ohio, Maryland — 85%
4. New Jersey — 83%
5. Massachusetts, Colorado, Iowa, Indiana, Missouri, Mississippi, South Dakota — 80%
6. Nevada — 75%

How the Laws Are Written: Four Different Models

The headline percentages hide important differences in how each rule is measured. An 85% floor measured per game is not the same as an 89% floor averaged across an entire casino floor.

1. Per-machine (per-game) minimums

Most states apply the floor to each individual game or machine. New Jersey's regulation says each slot game requiring a wager "shall have a theoretical return to player (RTP) equal to or greater than 83 percent." Pennsylvania's rule specifies that the payout "may not be less than 85%" when calculated using the lowest possible wager, with a separate requirement that it not exceed 100% at the highest wager. Missouri requires that electronic gaming devices not be programmed to pay out less than 80% of all wagers.

2. Lifetime averages

Kansas frames its rule over time rather than per spin: electronic gaming machines must "pay out an average of not less than 87% of the amount wagered over the life of the machine." This is the highest per-machine floor among the states reviewed.

3. Facility-wide aggregates

Maine's statute is unusual. It sets a "minimum average daily aggregate payback percentage of 89%," calculated across all machines at each facility and measured quarterly. Individual games can pay less as long as the casino-wide average meets the threshold. Maryland historically used a hybrid: in 2015, the state required a 90% average across all machines with an 87% minimum on any individual machine, according to Global Gaming Business. The per-machine floor was later reduced to 85% effective July 1, 2021, giving casinos what the state described as more flexibility in their product offerings.

4. Ranges with a ceiling

Colorado and Iowa set both a floor and a ceiling. Colorado law requires payback of "at least eighty but not more than one hundred percent" of the value of any credit played, with an exception for tournament machines that neither accept nor pay out coins or tokens. Iowa's rule reads that a game's theoretical payout "must be at least 80 percent and no more than 100 percent of the amount wagered." The ceiling exists to prevent machines that would systematically lose money for the operator, which regulators view as a potential integrity or money-laundering risk.

Legal Minimum vs. Actual Payback

The most important point for anyone citing these laws: statutory minimums are not what casinos actually pay. Competition, player expectations and regulator reporting keep real-world returns far higher.

Market	Legal minimum	Observed payback (approx.)	Gap above minimum	Data source
Nevada (statewide, 2025)	75%	~92.9% (7.1% hold)	~17.9 points	UNLV Center for Gaming Research via Covers
Las Vegas Strip (2025)	75%	~92.5% (7.5% hold)	~17.5 points	UNLV via Covers
Reno (2025)	75%	~94.8% (5.21% hold)	~19.8 points	UNLV via Covers
Pennsylvania (FY 2024-25)	85%	~90.2% (payouts ÷ wagers)	~5.2 points	PA Gaming Control Board

Observed payback for Nevada is calculated as 100% minus reported slot hold. Pennsylvania payback is DeucesCracked's calculation of total payouts divided by total wagers. Hold and payback are close but not identical measures; see Methodology.

Nevada: the lowest floor, but not the tightest slots

Nevada is the clearest example of why the legal minimum is misleading. Despite a 75% floor, the Nevada Gaming Control Board says modern machines typically return roughly 90% to players over time. A UNLV Center for Gaming Research study reported by Covers found Nevada's statewide slot hold rose from 6.55% in 2004 to 7.1% in 2025, meaning machines are gradually paying out less, but by about half a percentage point over two decades. In 2025, the Las Vegas Strip had the highest average hold at 7.5%, while Reno had the lowest at 5.21%. Reno's slots, in other words, returned nearly 20 percentage points more than Nevada law requires.

Pennsylvania: closer to the floor

Pennsylvania offers some of the most granular public data in the country. The PA Gaming Control Board's fiscal 2024-25 slot report (July 2024 through June 2025) lists statewide wagers of about $28.71 billion and payouts of about $25.91 billion. That works out to an average payback of roughly 90.2%, about 5.2 points above the 85% legal minimum. By casino, our calculations from the same report show Wind Creek at about 91.25%, Parx Casino at 90.27%, Harrah's Philadelphia at 89.92% and Mohegan Pennsylvania at 89.83%. Gross terminal revenue, the figure after promotional play deductions, was about $2.24 billion, or 7.8% of wagers.

Pennsylvania's tighter average likely reflects its high slot tax rate, which leaves operators with less margin and a stronger incentive to set games closer to the legal floor than Nevada operators do. The PGCB's 2025 calendar-year report showed retail slot machine revenue of $2.43 billion, down slightly from $2.45 billion in 2024, as online casino revenue climbed to $2.78 billion.

Why the Floors Differ So Much

The 14-point spread between Nevada and Maine reflects policy history more than player protection philosophy.

• Market maturity. Nevada's regulations date from an era when the state was the only major US slot market. Competition among thousands of properties, rather than law, sets the real price of a slot spin there.
• Racino and lottery models. States that introduced slots through racetracks or lottery-run video lottery terminals, such as Kansas, Maine and Maryland, often wrote higher floors into the authorizing legislation to win public support.
• Industry standards. Many regulators adopt the GLI-11 technical standard from Gaming Laboratories International, whose default minimum is 75%. Massachusetts amended that standard in its regulations to replace "seventy-five percent (75%)" with "eighty percent (80%)."
• Revenue pressure. Lower floors give operators flexibility to offer high-volatility games with large top prizes. Maryland's 2021 reduction from 87% to 85% was explicitly framed as giving casinos more product flexibility.

What This Means for Players

A legal minimum is a consumer-protection backstop, not a pricing guide. Three practical points follow from the data.

The floor tells you little about any given machine. A game in a 75% state may pay 95%, while a high-denomination machine in an 85% state may pay 88%. Denomination matters: in most markets, higher-denomination machines return more than penny games.

Location within a state matters more than the state. The Reno-versus-Strip spread of more than two percentage points in hold is larger than the difference between many states' observed averages.

Online slots operate under different rules. Regulated online casino games are usually certified to their own RTP standards, and published RTPs for online slots commonly sit in the mid-90s. If you play online, our guide to the best online casinos covers licensed operators, and our casino hub explains game selection and house edge. Players outside regulated states may also compare sweepstakes casinos, which are subject to separate state-by-state legal treatment. For a broader introduction to gambling math, see our guides library.

Methodology

We identified states with commercial slot payback minimums by searching state statute databases and administrative codes, then verified each figure against the primary legal text, using official legislature websites or the Legal Information Institute at Cornell Law School and Justia's regulation archives. Where a figure could not be confirmed from a primary or authoritative source (for example, several states whose rules cross-reference other provisions without stating a number), we excluded it from the table rather than relying on unverified secondary lists. Mississippi's 80% figure is based on the regulatory language as quoted by the Las Vegas Advisor; Nevada's 75% is confirmed by Regulation 14.040 and Nevada Gaming Control Board statements reported by Covers.

Observed payback for Nevada is 100% minus the slot hold percentage reported by UNLV's Center for Gaming Research. Slot hold includes some accounting effects (such as progressive jackpot accruals and the timing of large wins), so it approximates but does not exactly equal theoretical RTP. Pennsylvania payback is calculated by dividing total payouts by total wagers from the PGCB's fiscal-year monthly slots report. Tribal casino compacts, which often contain their own payback provisions, are outside the scope of this study. Laws change; figures reflect the statutory text available as of November 2026.

Frequently Asked Questions

What is the minimum legal slot payback in Nevada?

Nevada requires slot machines to have a theoretical payout of at least 75% under Nevada Gaming Commission Regulation 14.040. It is the lowest floor in the US, though actual statewide payback is roughly 92-93% based on 2025 hold data.

Which state has the highest required slot payback?

Among the states reviewed, Maine has the highest floor at an 89% average daily aggregate across each facility. Kansas has the highest per-machine standard at 87% over the life of each machine.

Do casinos pay out at the legal minimum?

Almost never. Pennsylvania slots paid back about 90.2% in fiscal 2024-25 against an 85% floor, and Nevada slots returned about 92.9% in 2025 against a 75% floor. Competition and player expectations keep returns well above the legal minimum.

What does a slot payback percentage mean?

It is the long-run share of all money wagered that a machine is designed to return to players. A 90% payback means that, over millions of spins, the machine returns about $90 for every $100 wagered. Individual sessions can vary enormously from that average.

Is there a maximum slot payback percentage?

Some states set one. Colorado and Iowa cap theoretical payback at 100%, and Pennsylvania requires that payout not exceed 100% when calculated at the highest wager, so that machines cannot be designed to lose money over time.

Sources

• 58 Pa. Code § 461a.7 — Slot machine minimum design standards (Cornell LII)
• N.J.A.C. 13:69E-1.28A — Standards for the approval of a slot machine game (Cornell LII)
• Ohio Revised Code § 3772.20
• C.R.S. § 44-30-813 (Colorado)
• Iowa Admin. Code r. 491-11.9 — Slot machine requirements
• 68 IAC 6-29 (Indiana)
• 11 CSR 45-5.190 — Minimum Standards for Electronic Gaming Devices (Missouri)
• SDCL § 42-7B-36 (South Dakota)
• 8 M.R.S. § 1020 — Registration of slot machines (Maine)
• K.S.A. § 74-8749 (Kansas)
• 205 CMR 143.01 (Massachusetts)
• Maryland Department of Legislative Services — VLT payout change report
• Global Gaming Business — Maryland Casinos Seek to Reduce Payout Minimum
• Las Vegas Advisor — State slot payback minimums
• Covers — Study Finds Nevada Slot Machines Gradually Paying Out Less
• Pennsylvania Gaming Control Board — Monthly Slots Revenue FY 2024-25
• Pennsylvania Gaming Control Board — 2025 Year-End Revenue

Cite This Article

If you use data from this article, please link back to https://www.deucescracked.com/blog/slot-machine-minimum-payback-laws-by-state-data. Suggested citation: DeucesCracked Editorial, "Slot Machine Payback Laws by State: Minimum RTP Data," DeucesCracked, November 2026.