Legal NFL Betting Stagnates as Prediction Markets Drain Tax Revenue

The rise of platforms like Kalshi and Polymarket has disrupted the trajectory of the legal gambling market. While commercial sportsbooks operate under strict state and tribal oversight, these prediction markets function outside established regulatory frameworks, bypassing the age restrictions and tax mandates that define the legal industry. According to the AGA, sports wagers currently account for roughly 80% of Kalshi's total volume, with an estimated $5.1 billion coming from users aged 18 to 20—a demographic prohibited from betting in most legal jurisdictions.

This shift carries significant economic consequences for public coffers. The AGA reports that unregulated markets have siphoned over $1.3 billion in potential state gaming tax revenue since 2025, funds that typically support education and infrastructure projects. AGA President Bill Miller cautioned that these platforms pose a danger by framing sports betting as an investment rather than entertainment. By operating without accountability or consumer protections, these entities are effectively challenging the legal status of sports betting across all 50 states, including the 11 jurisdictions where such wagering remains prohibited.