Indian Gaming Regulatory Act (IGRA)
The Indian Gaming Regulatory Act (IGRA) is the 1988 U.S. federal law that defines how tribal gaming works in every state; including Wisconsin. Without IGRA, Wisconsin’s three retail tribal sportsbooks could not exist, and the upcoming online launch under 2025 Wisconsin Act 247 could not be structured the way it is.
The Three Classes of Gaming
- Class I: Traditional and ceremonial tribal games. Regulated only by the tribe.
- Class II: Bingo and certain non-banked card games. Regulated by the tribe and the National Indian Gaming Commission (NIGC).
- Class III: Casino-style gaming; slots, table games, and sports betting. Requires a tribal-state compact under IGRA.
Sports betting is Class III. That’s why Wisconsin had to update its tribal compacts to authorize it.
What Is a Tribal-State Compact?
A compact is a negotiated agreement between a federally recognized tribe and the state in which it operates Class III gaming. The compact spells out:
- Which games are authorized
- Revenue-sharing percentages back to the state
- Regulatory standards (background checks, internal controls, audits)
- Geographic and jurisdictional boundaries
Once signed by the tribe and the state, the compact must be approved by the U.S. Department of the Interior’s Bureau of Indian Affairs before it takes effect.
The “60% to Tribes” Rule
Federal IGRA requires that at least 60% of gross gaming revenues remain with the tribe. This is the structural reason commercial sportsbook operators (DraftKings, FanDuel, BetMGM) have publicly opposed Wisconsin’s tribal-only model; the math does not work for them under traditional commercial economics.
Hub-and-Spoke and IGRA
Wisconsin’s online launch will use a “hub-and-spoke” structure: the betting server (the “hub”) sits physically on tribal land, and mobile devices anywhere in Wisconsin (the “spokes”) connect to it. Under federal court rulings on IGRA; most notably the West Flagler v. Haaland litigation involving the Florida Seminoles; wagers placed off-reservation but processed on-reservation are deemed to legally occur on tribal land.
Why It Matters for Wisconsin Bettors
- Every sportsbook you can legally bet at in Wisconsin operates because of IGRA.
- Future statewide mobile betting will operate under IGRA’s hub-and-spoke interpretation, not under a commercial-license framework.
- Disputes over compact terms or BIA approvals can delay launches; the 2027 launch target for online betting reflects the time these federal steps require.