Tribal Gaming Regulation Costs $450 Million a Year: The Fairness Argument

Among the arguments tribes have placed before the Supreme Court in the prediction market litigation, one is as much about economics as law: the cost of regulation. According to a summary of the amicus filings published by Pillsbury, tribes spend more than $450 million a year on gaming regulation and employ more than 6,000 regulators. Tribal gaming regulation cost, in other words, is large enough to be a policy argument in its own right, and it deserves examination apart from the headline questions of sovereignty and preemption.

The number and what it describes

The figures appear in the brief filed on October 8 by 130 federally recognized tribes and 15 tribal organizations, as summarized by Pillsbury. The same filings place the industry's scale at nearly 250 tribal governments operating gaming facilities across 29 states, with more than $46 billion in gross gaming revenue in fiscal year 2025. Against that revenue base, $450 million in regulatory spending is a meaningful but not enormous share, which is consistent with the layered oversight structure that IGRA created.

That structure is worth restating, because the cost is distributed across several bodies. Each tribe operates its own gaming regulatory authority, which licenses employees, inspects operations and enforces internal controls. The National Indian Gaming Commission oversees Class II gaming and provides federal oversight more broadly, and states take on defined roles in Class III gaming under tribal-state compacts. Our explainers on the tribal, federal and state layers of casino regulation and the tribal gaming regulatory authority describe who does what. The figure in the briefs should be read as an aggregate across that system, as characterized by the amici; the filings summarized here do not break it down by layer in the detail available to us.

Why regulators argue the cost matters

The tribes' reasoning runs as follows. Casino gaming under IGRA comes with licensing, background investigation, surveillance, audit and minimum internal control requirements, and tribes finance that apparatus out of gaming revenue. Prediction market operators, by contrast, say they answer only to the Commodity Futures Trading Commission. The amici call the resulting difference unfair: a competing product that takes sports wagers, they argue, avoids the compliance costs that licensed gaming bears. Our explainer on tribal gaming commissions and minimum internal control standards shows what those obligations look like in practice.

It is important to describe the counterposition fairly. The prediction market side maintains that its contracts are congressionally permitted investment trading, not gambling, and that a single federal regulator is the intended framework. On that view, comparing regulatory costs between a casino and a derivatives exchange confuses two different kinds of activity. Whether the comparison is apt is precisely what courts are deciding, and this article does not resolve it. The regulatory cost argument is best seen as a framing of the stakes rather than a legal holding.

There is also a consumer-protection dimension that regulatory spending supports. Tribal and state responsible gaming rules, such as self-exclusion programs and age verification at the point of play, depend on a licensed operator that can be held accountable. Readers can compare those obligations in our pieces on tribal casino self-exclusion programs and on player protection in Indian Country.

Capacity, credentials and the people behind the number

A workforce of more than 6,000 regulators raises a practical question the briefs do not address: how sustainable is it to staff and credential that many professionals, particularly in smaller or remote tribal gaming operations? We have examined that issue in our analysis of regulator workforce credentialing and capacity. The point matters for the fairness argument in a second way. If regulatory costs are meaningful and fixed, they weigh more heavily on a small operation than on a large one, which complicates any simple claim that regulation is proportionate to revenue.

Federal oversight is itself in flux. The NIGC has faced questions about its commission structure and quorum, discussed in our analysis of the single-commissioner quorum issue. When federal capacity is thin, the burden placed on tribal regulators grows, which strengthens the amici's claim that tribes are carrying much of the load. That, however, is an inference from the structure, not a finding in the filings.

What this argument can and cannot do

As a legal matter, regulatory cost does not decide whether the Commodity Exchange Act displaces IGRA or whether a bet placed from tribal land is subject to the statute. Those are questions of text and precedent. The Ninth Circuit's September 16 opinion in Blue Lake Rancheria v. Kalshi, as reported by Covers, rejected the argument that the Commodity Exchange Act displaces IGRA and treated a customer's participation from tribal land as sufficient to bring the transaction within IGRA. The cost argument is better understood as supporting the equities and the policy rationale for tribal authority: the claim that gaming revenue and gaming regulation are two sides of one ledger.

For readers following the sovereignty debate, the number offers a useful reference point. It translates an abstract jurisdictional dispute into a budget line. For the state-by-state context in which these regulators operate, see the tribal gaming directory and the Legal Guide.