McDonald’s AI Pricing Lawsuit, Customers Accuse McDonald’s of Algorithmic Price-Fixing

A proposed nationwide class action filed in federal court in Chicago accuses McDonald’s USA, LLC and McDonald’s Corporation of using an AI-powered pricing system to coordinate menu prices across its U.S. restaurants. The plaintiff says the arrangement violates federal antitrust law. McDonald’s denies the allegations and says it will vigorously defend the case.

Important for consumers: there is no settlement, no claim form and no money available. No class has been certified. Everything described below is an allegation, not a court finding.

McDonald’s AI Pricing Lawsuit: Quick Facts

Detail	Information
Case	Thomas v. McDonald’s USA, LLC et al.
Case number	1:26-cv-12149
Court	U.S. District Court, Northern District of Illinois (Chicago)
Filed	October 2, 2026
Plaintiff	Michael Thomas, of DeKalb, Illinois
Defendants	McDonald’s USA, LLC and McDonald’s Corporation
Type of case	Proposed (putative) nationwide consumer antitrust class action
Main federal claim	Sherman Act, Section 1 (15 U.S.C. § 1)
Other claims	Illinois Antitrust Act and Illinois consumer-protection law
Core allegation	A centralized machine-learning pricing engine uses nonpublic restaurant sales data to generate pricing recommendations, allegedly coordinating prices among restaurants that should compete
McDonald’s position	AI does not set menu prices; franchisees set their own prices; the tool only recommends
Class certified?	No
Settlement	None
Official settlement website	None (no settlement exists)
Claim form / claim deadline	None
Payout available?	No

What Is the McDonald’s AI Pricing Lawsuit About?

Michael Thomas, an Illinois customer, alleges that McDonald’s runs a centralized, machine-learning “pricing engine” that collects nonpublic sales and transaction data from restaurants across its U.S. system, which includes roughly 14,000 locations. According to the complaint, the system uses that pooled data to produce restaurant-specific price recommendations.

The plaintiff argues this goes beyond ordinary pricing advice. His theory is that competing restaurants, both franchised and company-operated, effectively share competitively sensitive information through the system and align their prices as a result. The complaint reportedly describes the conduct as algorithmic price-fixing and says, in words widely quoted in news coverage, that independent businesses must set their prices independently.

The complaint also alleges that McDonald’s has significant leverage over franchisees, monitored restaurants that moved away from recommended prices, and pressured operators to follow the recommendations. McDonald’s disputes this.

Who Is Michael Thomas?

Thomas is a McDonald’s customer who lives in DeKalb, Illinois. According to the lawsuit, he regularly orders a Quarter Pounder with cheese, fries and a Coke, and noticed price differences between McDonald’s restaurants near his home. He says he paid more than he would have if the restaurants had priced independently. He seeks to represent a proposed nationwide class of McDonald’s customers, which the lawsuit describes as potentially millions of people, along with an Illinois subclass.

How Does the Alleged AI Pricing System Work?

Based on the complaint and news reporting about it:

• McDonald’s allegedly collects confidential sales and transaction data from franchised and company-owned restaurants.
• Machine-learning models allegedly analyze that pooled data and generate recommended prices for menu items at individual locations.
• The complaint alleges these recommendations lead restaurants to move prices in the same direction.
• The complaint alleges mechanisms exist to monitor, and encourage compliance with, the recommendations.

The key distinction is the alleged use of one restaurant’s nonpublic data to influence pricing at another restaurant that may compete with it. The plaintiff is not simply claiming that McDonald’s uses software to analyze a restaurant’s own sales.

Some legal-news summaries of the complaint also describe a rule under which a price increase could be recommended once a certain share of other restaurants (reported as 30%) had raised the same item’s price. McDonald’s disputes the complaint’s characterization of its tool, and a rule like this would not by itself prove an unlawful agreement.

What Does McDonald’s Say?

McDonald’s called the complaint “filled with inaccuracies” and the claims “speculative and uninformed.” The company’s position, stated publicly on and around October 1, 2026 in a post titled “Separating Fact from Fiction: AI Does Not Set Prices at McDonald’s,” includes the following:

• AI does not set the price of a Big Mac or any other menu item.
• Franchisees, who own and operate about 95% of U.S. restaurants, make their own pricing decisions.
• Pricing tools provide recommendations that franchisees may choose whether to follow.
• McDonald’s does not use dynamic pricing, and its tools do not set customer-specific prices or change prices in real time.
• Pricing recommendation tools and analytics are common across industries.

McDonald’s has said it has used AI-enhanced pricing analytics for more than a decade, and that it collected data and recommended prices to franchisees well before that. The complaint, by contrast, alleges the centralized machine-learning engine has operated since at least 2019.

Is This a Dynamic Pricing Lawsuit?

No. The lawsuit is not mainly alleging that McDonald’s charges each customer a personalized price. The legal theory is different: that a shared system helps coordinate prices among restaurants that are supposed to compete with one another.

Why the Franchise Structure Matters

Most McDonald’s restaurants are owned by independent franchisees, which are separate businesses. Under antitrust law, separately owned businesses that compete for the same customers are generally expected to set prices independently.

McDonald’s still provides the brand, operating system, technology and standards, and the plaintiff argues that this gives it enough control that its “recommendations” function as more than suggestions. McDonald’s says franchisees remain responsible for setting prices. Whether the tool is truly optional or effectively coordinated is likely to be the central factual dispute.

What Laws Is McDonald’s Accused of Violating?

Sherman Act, Section 1 (15 U.S.C. § 1). This federal law prohibits contracts, combinations and conspiracies that unreasonably restrain trade. Price-fixing is among the most serious forms of antitrust violation. The federal docket identifies the case as an antitrust action under this statute. The complaint reportedly pleads both alleged price-fixing and the alleged exchange of competitively sensitive information.

Illinois Antitrust Act (740 ILCS 10/1 et seq.). The plaintiff also invokes Illinois antitrust law, which is particularly relevant because he lives and says he made purchases in Illinois.

Illinois Consumer Fraud and Deceptive Business Practices Act (815 ILCS 505/1 et seq.). This separate consumer-protection claim focuses on alleged deceptive or unfair conduct.

Does Using an AI Pricing Tool Automatically Violate Antitrust Law?

No. Businesses routinely use software to analyze their own sales, costs and market conditions, and recommending prices with an algorithm is not automatically illegal.

Concern grows when competing businesses allegedly share competitively sensitive information, agree to use a common pricing mechanism, coordinate price increases, or use an algorithm or third party to maintain an agreement. A court will look at the actual arrangement, not just the fact that AI is involved.

How Much Money Is the Lawsuit Seeking?

The plaintiff seeks monetary damages for the proposed class. Because it is an antitrust case, the complaint reportedly seeks treble damages where the law allows, meaning up to three times proven damages. It also seeks attorneys’ fees and injunctive relief.

That does not mean customers will receive three times what they spent. The plaintiff must first prove an antitrust violation and classwide injury, and damages would then be determined under legal standards that apply to the case.

Does a Higher Menu Price Prove Price-Fixing?

No. The lawsuit alleges customers paid higher-than-competitive prices, but no court has found that. McDonald’s menu prices have risen for many reasons, including labor, food, rent and utility costs, inflation, local competition and demand. McDonald’s has previously said average U.S. menu prices rose roughly 40% between 2019 and 2024 and attributes increases to those broader pressures. The plaintiff must show that the alleged coordination, not those factors alone, caused an antitrust injury.

What Did Reuters Report Before the Lawsuit?

The lawsuit followed a September 29, 2026 Reuters investigation into McDonald’s AI-assisted pricing. Reuters reported that the pricing engine analyzes data from millions of daily transactions across the U.S. network, and that some franchisees described pressure to follow recommendations. The complaint relies on that reporting. McDonald’s rejected the reporting’s characterization. Neither the reporting nor the complaint is a judicial finding.

How Is This Case Similar to the RealPage Lawsuits?

The McDonald’s case follows a pattern seen in other algorithmic-pricing litigation. In the RealPage cases, renters and government authorities alleged that competing landlords shared confidential data through revenue-management software and used its recommendations to raise rents. Similar class actions have targeted hotel pricing, including a case involving Atlantic City casino hotels that a federal appeals court recently revived.

In all of these cases, the central question is not simply whether software was used, but whether it facilitated coordination among competitors. The key difference here is the industry and structure: a franchise system with company-owned and independently owned restaurants.

Is There a McDonald’s AI Pricing Settlement?

No. There is currently:

• no settlement or settlement fund;
• no claim form or claim deadline;
• no settlement administrator; and
• no payment to consumers.

If a settlement is reached later, the court would generally have to approve it before any authorized claims process begins.

Can I File a Claim or Join the Lawsuit Right Now?

No. A proposed class is not a certified class. Before one can be certified, the plaintiff must satisfy Federal Rule of Civil Procedure 23, which includes requirements such as numerosity, commonality, typicality and adequacy of representation. The court has not ruled on certification, and no court-approved notice has been issued.

Do not assume you are part of an approved class. Be cautious of websites that claim to process McDonald’s AI-pricing claims. Do not submit receipts, bank details, Social Security numbers or other sensitive information to any site offering to file a claim. If a legitimate claims process ever opens, it will be announced through the court and an official settlement website.

Could Customers Eventually Receive Money?

Possibly, but only if the plaintiff wins a judgment, or the parties reach a court-approved settlement. Even then, any payment would depend on the terms and the method of distribution. There is no guaranteed payment.

What Happens Next?

The case is at a very early stage. McDonald’s will respond to the complaint, and the case may involve motions to dismiss, discovery, disputes over class certification and expert economic analysis. Evidence likely to matter includes:

• documents describing the pricing system and its rules;
• franchise agreements and communications with franchisees;
• records of recommendations and whether franchisees followed them;
• the restaurant data fed into the system; and
• economic evidence on consumer prices.

Outcomes in algorithmic-pricing cases often turn on whether the tool merely offers optional recommendations or effectively works as a mechanism for competitors to coordinate using shared nonpublic data.

Why This Case Matters Beyond McDonald’s

Companies increasingly use algorithms to recommend prices for housing, hotels, airline tickets, rental cars, retail goods and more. The case could help test how existing antitrust law applies when potentially competing businesses rely on a common algorithm and shared data instead of directly agreeing on prices. That does not make algorithmic pricing inherently illegal. Structure, information flows and actual use of the technology will matter.

McDonald’s AI Pricing Lawsuit Timeline

Date	Development
2019	The complaint alleges McDonald’s began using a centralized machine-learning pricing engine
Sept. 29, 2026	Reuters publishes an investigation into McDonald’s AI-assisted pricing
Oct. 1, 2026	McDonald’s publishes “Separating Fact from Fiction: AI Does Not Set Prices at McDonald’s”
Oct. 2, 2026	Michael Thomas files the proposed nationwide class action in the Northern District of Illinois
Oct. 5-7, 2026	National news outlets report on the lawsuit
Oct. 8, 2026	Case remains at the initial pleading stage; no class certification, no settlement

Frequently Asked Questions

Why is McDonald’s being sued over AI pricing?

Michael Thomas alleges McDonald’s uses a centralized AI-assisted system that pools nonpublic restaurant data and generates pricing recommendations, which he says facilitates unlawful price coordination among competing restaurants.

Does AI set McDonald’s menu prices?

McDonald’s says no. It says its tool provides recommendations and franchisees independently decide what to charge.

Is McDonald’s using dynamic pricing?

McDonald’s says no. It says its tools do not change prices in real time or set individual customer prices.

Is this a class action, and has a class been certified?

It is a proposed class action. The court has not certified a class.

Which court is hearing the case?

The U.S. District Court for the Northern District of Illinois in Chicago.

What law is McDonald’s accused of violating?

Section 1 of the Sherman Act (15 U.S.C. § 1), plus Illinois antitrust and consumer-protection laws.

Can I file a claim right now?

No. There is no claim form, settlement or court-approved claims process.

Will McDonald’s customers get money?

Possibly in the future, if the plaintiff wins or the parties reach a court-approved settlement. Nothing is guaranteed.

Does seeing different McDonald’s prices prove price-fixing?

No. Prices vary for many legitimate reasons, including local costs, rent, labor and competition. The lawsuit alleges coordination, which has not been proven.

What is the “30% rule” mentioned in coverage of the case?

Some legal-news summaries describe a rule tying price-increase recommendations to increases at a share of other restaurants, reported as 30%. This is an allegation, and McDonald’s disputes the complaint’s characterization of its system.

Bottom Line

The McDonald’s AI pricing lawsuit is not just about the cost of a Big Mac. It asks whether a large franchise system can use centralized, data-driven pricing recommendations built on information from potentially competing restaurants without crossing into unlawful price coordination.

Michael Thomas says McDonald’s crossed that line. McDonald’s says franchisees set their own prices and the tool is advisory. The court has decided neither question. For customers, the practical answer today is simple: there is no settlement, no claim form and no payment available.

Related Reading on AllAboutLawyer

• RealPage Lawsuit, DOJ Settlement Ends Rent Price-Fixing Scheme: What Renters Must Know
• Camden Property Trust $53M Rent Price-Fixing Settlement
• How To Claim A Lawsuit Settlement

Sources

• Federal docket, Thomas v. McDonald’s USA, LLC et al., No. 1:26-cv-12149 (N.D. Ill.): https://dockets.justia.com/docket/illinois/ilndce/1%3A2026cv12149/509041
• McDonald’s Corporation, “Separating Fact from Fiction: AI Does Not Set Prices at McDonald’s”: https://corporate.mcdonalds.com/corpmcd/our-stories/article/how-mcdonalds-sets-prices.html
• Reuters, “Inside McDonald’s push to have AI price your Big Mac” (Sept. 29, 2026): https://www.reuters.com/business/inside-mcdonalds-push-have-ai-price-your-big-mac-2026-09-29/
• Associated Press, “McDonald’s sued over AI tool that recommends prices to US franchisees”: https://apnews.com/article/bb78e854b11b54b394603effa7550bbe
• Los Angeles Times, “McDonald’s sued over AI pricing tool accused of raising menu prices” (Oct. 7, 2026): https://www.latimes.com/business/story/2026-10-07/mcdonalds-sued-over-ai-pricing-tool-accused-of-raising-menu-prices
• The Guardian, “McDonald’s sued for alleged antitrust violations by using AI tool to determine pricing for franchises” (Oct. 7, 2026): https://www.theguardian.com/business/2026/oct/07/mcdonalds-ai-prices-lawsuit
• Justia News, “Class Action Lawsuit Alleges Price-Fixing at McDonald’s” (Oct. 7, 2026): https://news.justia.com/class-action-lawsuit-alleges-price-fixing-at-mcdonalds/
• Newsweek, “McDonald’s faces lawsuit after denying AI price strategy”: https://www.newsweek.com/mcdonalds-faces-lawsuit-after-denying-ai-price-strategy-12529965
• Nation’s Restaurant News, “McDonald’s now faces a lawsuit over its pricing recommendations”: https://www.nrn.com/quick-service/mcdonald-s-now-faces-a-lawsuit-over-its-pricing-recommendations
• VitalLaw, “Antitrust News: McDonald’s sued for anticompetitive use of AI-driven algorithmic pricing tools”: https://www.vitallaw.com/news/antitrust-news-mcdonald-s-sued-for-anticompetive-use-of-artificial-intelligence-driven-algorithmic-pricing-tools/ald012adcc6c5554f46c5965910cba3e8a662
• Sherman Act, 15 U.S.C. § 1; Illinois Antitrust Act, 740 ILCS 10/; Illinois Consumer Fraud and Deceptive Business Practices Act, 815 ILCS 505/; Federal Rule of Civil Procedure 23

This article is for informational purposes only and is not legal advice. AllAboutLawyer.com is a consumer legal information site, not a law firm. The allegations against McDonald’s come from a newly filed complaint and have not been proven in court. McDonald’s disputes them. Court filings are the authoritative source. Consult a licensed attorney about your own situation.

Last updated: October 8, 2026