Michigan’s Online Casino Tax: How the MGCB’s 20% to 28% Tiered Rate Works in Practice

Michigan’s Lawful Internet Gaming Act imposes a graduated tax on commercial internet gaming operators ranging from 20% to 28% of adjusted gross receipts, calculated on a calendar-year basis and remitted monthly. The five-band structure, codified at MCL 432.314 (Act 152 of 2019), means that every operator generating more than $12 million in annual adjusted gross receipts pays 28% of that total to the state and host city. The state’s online casino market generated a record $3.1 billion in iGaming revenue in calendar year 2025, according to MLive reporting in January 2026, placing every active commercial operator well within the highest tier. Compliance teams need to understand the tax base, the allocation mechanics, and the significant divergence between the iGaming rate and Michigan’s flat 8.4% sports betting tax.

The Five-Band Graduated Rate: MCL 432.314

Section 14 of the Lawful Internet Gaming Act establishes the graduated tax applicable to commercial internet gaming operators. The statute sets out the rate schedule as follows:

“An internet gaming operator is subject to a graduated tax on the adjusted gross receipts received each calendar year by the internet gaming operator from all internet gaming it conducts under this act.”, MCL 432.314(1), Lawful Internet Gaming Act, Act 152 of 2019

Annual AGR Band	Tax Rate
Less than $4,000,000	20%
$4,000,000 or more, but less than $8,000,000	22%
$8,000,000 or more, but less than $10,000,000	24%
$10,000,000 or more, but less than $12,000,000	26%
$12,000,000 or more	28%

The rate bands apply to the full AGR amount as an aggregate figure for the calendar year. Tax payments are due monthly: MCL 432.314(3) requires each operator to remit the applicable amount for the preceding monthly accounting period by the tenth day of the following month. There is no mechanism for quarterly filing or annual settlement under the Act.

MCL 432.314(4) insulates operators from additional state or municipal excise, license, privilege, or occupation taxes imposed exclusively on internet gaming operators, except as otherwise provided in the Act. This protection does not override existing development agreements between an internet gaming operator and the city in which its casino is located. Under MCL 432.314(5), where a city has imposed a 1.25% municipal services fee on casino licensees, that same 1.25% fee applies to the operator’s internet gaming AGR. Detroit, which is home to three commercial casinos, imposes this fee, so operators licensed through Detroit casino properties carry the graduated state tax plus a 1.25% city charge on their iGaming AGR.

What Counts as Adjusted Gross Receipts?

How does Michigan define AGR for online casino tax purposes?

Adjusted gross receipts are not synonymous with gross revenue. MCL 432.303(a) defines adjusted gross receipts as gross receipts less a deduction equal to free play provided and wagered by authorized participants as an incentive to place, or as a result of placing, internet wagers. The deduction is subject to a phased cap tied to the operator’s years of operation:

Operating Year	Free Play Deduction Cap
Years 1, 3	Up to 10% of gross receipts
Year 4	Up to 6% of gross receipts
Year 5	Up to 4% of gross receipts
Year 6 and thereafter	No deduction permitted

The statute defines “year 1” as beginning on January 1 following the year in which the operator commences internet gaming operations. Any free play wagered during the partial year of launch is deductible at up to 10% of gross receipts for that period. For operators that launched in January 2021, year 6 began January 1, 2027, meaning the free play deduction expired entirely for those operators entering 2027. This phase-out is a structurally significant tax increase for operators who built their player acquisition models around promotional credits in early operating years.

Gross receipts under MCL 432.303(l) are defined as the total amount wagered by authorized participants less winnings and less amounts returned due to system malfunctions or integrity concerns. The statute explicitly includes free play credits wagered in gross receipts before the AGR deduction is applied, which means operators cannot net free play out of the tax base at the gross receipts calculation stage, they can only deduct it within the statutory caps at the AGR adjustment stage.

Tribal Internet Gaming Operators: Compact Payments, Not Tax

Do Michigan tribal casinos pay the same online casino tax rate?

Tribal internet gaming operators are expressly excluded from the Section 14 tax. MCL 432.314(2) provides that an internet gaming operator that is an Indian tribe is instead subject to the payment requirements under MCL 432.307(1)(f). The practical result is the same graduated percentage schedule, 20% through 28%, but the legal characterisation is different. Tribal operators make contractual payments pursuant to their compacts rather than paying a statutory tax. This distinction matters for sovereignty purposes and for how disputes over payment amounts are resolved.

MCL 432.307(1)(f) sets out the identical five-band schedule as Section 14, applied to the adjusted gross receipts the tribal operator receives from all internet gaming conducted under the Act. The payment is due on the same monthly timeline: the tenth day of the following month. The allocation of those funds differs from the commercial operator tax. Under MCL 432.315a, tribal payments are allocated as follows:

Recipient	Share of Tribal Payment
Host jurisdiction governing body	20%
State internet gaming fund	70%
Michigan Strategic Fund	10%

For comparison, commercial operator tax receipts are allocated under MCL 432.315: 30% to the host city for specified public services, 65% to the state internet gaming fund, and 5% to the Michigan agriculture equine industry development fund (capped at $3 million per fiscal year, with excess flowing to the internet gaming fund).

Tribes must also provide a waiver of sovereign immunity to the MGCB for the limited purpose of enabling the Board to enforce payment obligations, inspect records, and regulate the internet gaming operation. MCL 432.307(1)(h) specifies the exact scope of that waiver, limiting it to the functions described within the Act itself. Operators structuring tribal partnerships must confirm that the waiver language in the tribal compact aligns precisely with MCL 432.307(1)(h)(i), as the Board may not accept broader or narrower immunity waivers under the Act.

Where the Tax Revenue Goes: State Fund Allocation

The 65% share flowing to the state from commercial operators is deposited into the internet gaming fund established under MCL 432.316. From that fund, the Board allocates disbursements in the following priority order. Regulatory and enforcement costs of the MGCB are satisfied first. Costs related to millionaire party administration under the Traxler-McCauley-Law-Bowman Bingo Act are covered second. Third, $3 million per year is directed to the compulsive gaming prevention fund under the Compulsive Gaming Prevention Act, 1997 PA 70. Fourth, $2 million per year is directed to the Christopher R. Slezak First Responder Presumed Coverage Fund. All remaining amounts flow to the state school aid fund under Article IX of the Michigan Constitution.

The allocation creates a direct fiscal link between iGaming tax revenue and education funding, a political design choice that has been part of Michigan’s gambling revenue model since the passage of the Michigan Gaming Control and Revenue Act in 1996. Operators and government affairs teams tracking legislative risk should note that calls to increase the online casino tax rate are therefore entangled with the state’s school funding debate rather than purely with gaming policy.

The Sports Betting Comparison: 8.4% vs. Up to 28%

Why is Michigan’s sports betting tax so much lower than its online casino rate?

Michigan’s Lawful Sports Betting Act, Act 149 of 2019, imposes a flat tax of 8.4% on adjusted gross sports betting receipts under MCL 432.414(1). There is no graduated schedule: all commercial sports betting operators pay 8.4% regardless of volume. The same rate applies equally whether an operator generates $2 million or $200 million in sports betting AGR per year.

The contrast with the iGaming rate is substantial. An operator generating $15 million in annual AGR pays 8.4% on that amount from sports betting ($1.26 million) versus 28% on comparable iGaming AGR ($4.2 million). The effective rate differential of 19.6 percentage points at the top iGaming tier reflects a legislative judgment that online casino games generate higher margins and higher social risk than sports wagering, and should therefore fund a larger share of public services.

“A sports betting operator is subject to a tax of 8.4% on its adjusted gross sports betting receipts.”, MCL 432.414(1), Lawful Sports Betting Act, Act 149 of 2019

Both the sports betting and iGaming statutes parallel each other on the tribal carve-out: sports betting operators that are Indian tribes make compact payments rather than paying the statutory 8.4% tax, on the same monthly remittance schedule, with the amount calculated on their adjusted gross sports betting receipts. MCL 432.414(2) references the sports betting equivalent of the tribal compact obligation. The 1.25% municipal services fee mechanism also applies in parallel for sports betting operators with Detroit casino licenses, under MCL 432.414(5).

Product	Tax Structure	Rate	Statute
Online Casino (iGaming)	Graduated on annual AGR	20%, 28%	MCL 432.314, Act 152 of 2019
Online Sports Betting	Flat on AGR	8.4%	MCL 432.414, Act 149 of 2019
Detroit Municipal Fee (both)	Additional on AGR	1.25%	MCL 432.314(5) / MCL 432.414(5)

Effective Tax Burden at Scale

For compliance and finance teams modelling Michigan’s true cost, the 28% statutory rate is not the ceiling of the effective burden. Commercial operators holding Detroit casino licenses carry the 1.25% municipal services fee on top of the graduated state tax, producing an effective rate of 29.25% on iGaming AGR once an operator crosses the $12 million annual threshold. For sports betting, the same Detroit operators face a combined effective rate of 9.65% (8.4% plus 1.25%).

Michigan’s iGaming market reached a record $322.1 million in online casino gross receipts in March 2026 alone, according to MGCB data, with adjusted gross receipts up 25.6% from the prior year period. At that scale, the state collected approximately $64.1 million in iGaming taxes from commercial operators in a single month. Every active commercial operator in Michigan operates well above the $12 million annual AGR threshold, meaning the 28% rate is the operative rate for all current commercial licensees. The lowest tiers of the graduated schedule function as entry-phase brackets for new operators in their initial ramp-up months before annual AGR accumulates past $4 million.

Operators with calendar-year AGR approaching band boundaries must track cumulative monthly AGR carefully. The statute applies the rate to the full annual AGR figure, not to incremental amounts within each band as a marginal rate system would. The text of MCL 432.314 sets out the rate against the total annual AGR without language indicating marginal application, so the rate applicable to the full-year AGR is determined by which band the total figure falls into. Compliance teams should consult qualified legal counsel for confirmation of how the MGCB applies the rate in practice for operators who cross a band boundary mid-year.

Operator Licensing Eligibility and Tax Obligations

Only two categories of entity may hold an internet gaming operator license in Michigan. Under MCL 432.306(1), the Board may issue a license to a person that holds a casino license under the Michigan Gaming Control and Revenue Act, 1996 IL 1 (the commercial Detroit casino framework), or to an Indian tribe that lawfully conducts Class III gaming in a Michigan casino. Each eligible casino licensee or tribal entity may hold no more than one internet gaming operator license.

The tax obligation attaches to the internet gaming operator, not to any platform provider, skin operator, or third-party technology supplier working beneath that operator. Internet gaming suppliers, licensed separately under MCL 432.308, do not bear any portion of the graduated tax. The operator is the legally responsible taxpayer, and MCL 432.313(1)(d) classifies willful failure to report, pay, or truthfully account for the tax as a criminal misdemeanor punishable by up to one year of imprisonment or a $10,000 fine.

For operators entering the Michigan market as platform or content suppliers, GLI certification by an MGCB-designated test laboratory remains a prerequisite for software approval. The GLI certification process covers the technical standards and laboratory approval pathways applicable across multiple US state jurisdictions. Platform providers should confirm current MGCB test laboratory approvals before scheduling certification, as authorization status can change.

Responsible Gambling Obligations Linked to Tax Administration

Michigan’s tax framework does not exist in isolation from the MGCB’s player protection requirements. The internet gaming fund directs $3 million annually to the Compulsive Gaming Prevention Fund under the Compulsive Gaming Prevention Act, 1997 PA 70, MCL 432.253. Operators must maintain responsible gaming measures under MCL 432.307(1)(d) consistent with the standards described in Section 12 of the Act, covering deposit limits, self-exclusion, and mandatory player protections. In April 2026, the MGCB announced a partnership with Gamban to provide Michigan residents free access to gambling-blocking software, a voluntary responsible gaming initiative separate from the statutory self-exclusion program. Operators must treat compliance with the responsible gaming requirements of MCL 432.312 as an ongoing license condition, not merely as a one-time certification step.

For a comparison of how US state iGaming tax structures interact with operator registration obligations in other North American markets, the compliance frameworks in Ontario and Alberta provide a useful contrast, where a revenue-share model replaces a direct tax obligation. Ontario’s iGaming Ontario collects approximately 20% of operator revenue under its conduct-and-manage framework rather than levying a tiered tax on AGR, creating a structurally different commercial and compliance exposure for operators active in both markets.

Key Resources

Michigan Lawful Internet Gaming Act, Act 152 of 2019, MCL 432.301 to 432.316: MCL 432.314 (graduated tax), MCL 432.303 (definitions, AGR), MCL 432.315 (tax allocation), MCL 432.307 (tribal compact payments).

Michigan Lawful Sports Betting Act, Act 149 of 2019: MCL 432.414 (sports betting tax rate).

Michigan Gaming Control Board: michigan.gov/mgcb.