Michigan Bet Everything on iGaming. The Numbers Show It Won. So Does the Fine Print
Michigan’s iGaming market generated $2.9 billion in adjusted gross receipts in 2025, nearly 10 times what state analysts projected in 2019.
In 2019, Michigan’s House Fiscal Agency modeled what a mature, five-year online casino market might look like. Its estimate: roughly $300 million in annual adjusted gross receipts. The 2025 actual figure came in at $2.9 billion. That is not a rounding error. That is a projection being wrong by a factor of nearly ten, in the most favorable possible direction.
Last year, tax revenue from online casinos alone was nearly 16 times what state fiscal analysts modeled seven years ago. The iGaming market generated $597.5 million in state tax revenue in 2025, up from $201.7 million in 2021, $289.2 million in 2022, $354 million in 2023, and $451.4 million in 2024. The growth curve has not flattened. March 2026 set a new monthly record for iGaming gross receipts at $322.1 million, up from the previous record of $315.8 million set just three months earlier.
The Numbers That Tell the Story
Michigan launched iGaming on January 22, 2021. What followed is the most instructive case study available for any state currently debating whether to legalize online casino games.
In 2025, Michigan’s combined iGaming and online sports betting adjusted gross receipts reached $3.3 billion, a 39.5% increase over 2024. iGaming alone accounted for $2.9 billion of that total. Online sports betting contributed $435.9 million. The gap between the two products is not incidental. It is the defining characteristic of Michigan’s market and increasingly of the national picture.
National iGaming revenue grew 27.6% in 2025 to a record $10.73 billion across the seven states with legal online casinos. Pennsylvania was the largest market at $3.46 billion, with Michigan and New Jersey close behind. In both Pennsylvania and New Jersey, iGaming revenue exceeded land-based casino revenue for the first time in 2025. Michigan is not far behind that threshold. iGaming taxes in Michigan already exceed what the state collects from the three Detroit commercial casinos.
Sports betting, by comparison, produced $27.1 million in state tax revenue in 2025, compared with iGaming’s $597.5 million. The ratio is roughly 22 to 1. For policymakers in states currently weighing iGaming expansion, that number is the one worth examining most carefully. Sports betting legalization generates significant handle and media coverage. iGaming generates the actual tax revenue.
The Cannibalization Question That Keeps Getting Answered
The most persistent objection to iGaming legalization is that online casino games will cannibalize brick-and-mortar casino revenue, shifting activity from physical floors to phones without growing the market. Michigan has now run this experiment for five years.
Brick-and-mortar casino aggregate revenue at the three Detroit casinos has remained largely steady from 2021 through 2025, even as iGaming grew from $201.7 million to $597.5 million in annual tax revenue. The market did not shift; it expanded. The customers playing online were not, on aggregate, customers who would otherwise have driven to MGM Grand Detroit or MotorCity Casino. They were either existing gamblers playing more or, more likely, a largely new cohort that the physical casino never reached.
Former state Rep. Brandt Iden, the Republican who led the 2019 legalization effort, said as much. “I always knew that the market growth would be significantly larger than the legislative fiscal forecasts put forth by the state,” he said. Whether he anticipated a 10x miss on the projections is another question, but the directional call was right.
The national data support the same conclusion. The AGA’s 2026 State of the States report notes that commercial land-based casino revenue grew 2.3% in 2025, while iGaming grew 27.6%. The two products are not drawing from the same pool.
The Self-Exclusion Numbers Nobody Is Talking About
Michigan’s success story has a second set of numbers that appears in the same regulatory reports, and it deserves to be read alongside the revenue figures rather than in a separate responsible gambling paragraph at the end of a press release.
When Michigan legalized iGaming and online sports betting in 2019, it created a Responsible Gaming Database that problem gamblers could voluntarily add themselves to. The database had 78 participants at the end of 2021, its first year. By the end of 2022, it had grown to 343. AT the end of 2023, 691. By December 2024, 1,156. And by the end of 2025, 1,644.
That is a 21-fold increase in five years, in a registry that began the same year iGaming launched. The growth is not linear. It is accelerating alongside the revenue.
The casino-specific Disassociated Persons List, which predates iGaming and covers in-person gambling at the Detroit casinos, tells a different story by comparison. Since that list began in 2001, 4,252 people had enrolled by the end of 2025, representing 24 years of accumulation. The online Responsible Gaming Database added 1,644 people in five years. Adjusted for time, the online product is generating self-exclusion entries at roughly four times the rate of the in-person product.
The Center for Addiction Science, Policy, and Research ranked Michigan 49th out of 52 states and territories for online gambling protections in March 2026, giving it an F grade in part because of its limited mechanisms to prevent addiction or bankruptcy, and its failure to prevent sportsbook operators from offering bets to individuals exhibiting signs of gambling addiction.
The state’s response to that ranking has been largely institutional. The MGCB’s monthly press releases include a responsible gambling boilerplate. Governor Whitmer signed legislation increasing state funding for responsible gaming in October 2024. Two bills introduced by state Sen. Erika Geiss would restrict gambling advertising and ban targeted ads to those under 21. Bankruptcy attorneys in Detroit report that an increasing number of their cases are now linked to online gaming. Attorney Walter Metzen described clients who had accumulated $200,000 in debt from online sports betting and others who had wagered $20,000 on individual football games.
The Multi-State Self-Exclusion Question
The editor’s instinct to compare self-exclusion data across states is the right analytical impulse, and it points toward a piece that would require more reporting than this one. The structural question is whether states that launched earlier or later, or that have more or less aggressive self-exclusion infrastructure, show meaningfully different enrollment trajectories relative to their market size.
Michigan’s data is published because the MGCB maintains a centralized registry and releases enrollment numbers with its monthly revenue reports. Not every state with iGaming does this. New Jersey’s Division of Gaming Enforcement publishes self-exclusion statistics. Pennsylvania’s Gaming Control Board does as well.
If the self-exclusion data is available across multiple states and launch cohorts, the comparison would be genuinely informative: does the enrollment rate stabilize as a market matures, or does it continue to grow in proportion to revenue? Michigan’s five-year trajectory suggests the latter, but five years is not enough to know whether that reflects a growing market still producing new problem gamblers or a structural feature of online gambling that does not self-correct over time.
That is the more important policy question underneath the revenue numbers. Michigan won on the fiscal bet it made in 2019. Whether it won on the public health bet is a question that 1,644 database entries and an F grade from a research center suggest is not yet answered.
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