How AI triggered a federal lawsuit? McDonald’s sued over AI pricing: What the Big Mac case says about franchisee independence

McDonald’s AI pricing case: An Illinois customer just sued McDonald's in federal court. The case targets the company's AI-powered pricing system, which operates across nearly 14,000 U.S. restaurants.

Michael Thomas filed the proposed class action on October 2, 2026, in Chicago. He claims the fast-food giant uses central software to coordinate menu prices across independently owned stores.

McDonald’s sued over AI-powered pricing: What’s the case all about?

The lawsuit points to a real-world price gap documented in Fresno, California. Two company-owned McDonald’s locations just two miles apart sold the same Big Mac for different amounts. One charged $5.69. The other charged $6.89.


Menu prices vary on other items too. The Big Arch Burger ranged from $8 to $9 depending on where you bought it.

The complaint says automated tools analyze traffic patterns and local spending habits. That data helps the system estimate how much customers are willing to pay at specific locations.

Under federal antitrust laws, competing business owners must set their prices independently.

The lawsuit argues that pooling nonpublic sales data into a central algorithm breaks that rule. When store owners rely on shared recommendations from the same AI, the complaint says they lose true independence.

The system processes millions of daily transactions to suggest menu prices. The plaintiff argues that sharing that data creates coordinated pricing without anyone ever picking up the phone.

McDonald's pushed back hard against the claims, calling them uninformed and speculative.

Company executives said AI does not set menu prices or change costs in real time. They described the software as a basic research tool that gives recommendations based on local market trends.

Franchisees own and run almost 90 percent of U.S. McDonald's locations. Corporate leadership says those individual owners keep total control over their final prices based on local labor costs and overhead.

This lawsuit comes as software companies urge restaurants to adopt automated pricing tools. However, customers often push back against flexible menu costs. Wendy's backed off plans to test dynamic pricing on digital menu boards in 2024 after heavy public backlash.

Similar class actions now target automated pricing tools used by hotel chains, landlords, and retailers. The outcome in Chicago could force any company using central pricing software to prove human managers made the final call.