Amazon Advertising Auction Lawsuit Tracker

What happened?

The Federal Trade Commission and the attorneys general of Alaska, Arizona, California, Colorado, Florida, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Nebraska, New Jersey, New York, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Vermont, and Washington sued Amazon. The plaintiffs allege violations of federal and state consumer-protection laws and seek injunctive and monetary relief. Federal Trade Commission

The suit is a government enforcement action, not a class action filed on behalf of a certified class. Its filing does not establish that Amazon violated the law, that any advertiser was overcharged, or that any advertiser is eligible for payment.

What are Amazon Sponsored Ads?

Amazon sells advertising placements to sellers, vendors, brands, authors, and agencies. The complaint discusses Sponsored Products, Sponsored Brands, and advertising described by the government as Display Ads. Product names and mechanics can differ: “Display Ads” should not automatically be treated as identical to Amazon’s current “Sponsored Display” offering.

Sponsored Products are generally cost-per-click ads. An advertiser sets a maximum bid, but winning and pricing can account for relevance, predicted shopper response, placement, and other auction inputs. Amazon’s current public product page describes a bid as the maximum amount the advertiser is willing to pay for a click. Amazon Ads

What the FTC and states allege

The government says Amazon historically taught advertisers that Sponsored Ads used generalized second-price auctions: a winner would ordinarily pay only what was needed to beat the next-ranked competitor rather than the winner’s own maximum bid. The complaint cites advertiser materials dating to at least 2014 and later training examples. U.S. District Court filing via FTC

Plaintiffs allege that, beginning around late 2018 and 2019, Amazon added an internally calculated price called a “soft reserve” or “proxy 2nd price.” According to the complaint, Amazon could use the higher of the competition-generated price and this Amazon-selected figure, without exceeding the advertiser’s maximum bid. An internal description quoted in the complaint referred to an “invented auction participant.” These are the government’s characterizations of disputed conduct, not judicial findings.

The complaint alleges a rollout that included Sponsored Brands in 2019 and increasingly affected Sponsored Products. It alleges Sponsored Products advertisers paid their full bid in 79.1% of covered auctions in 2024, after lower alleged rates in prior years. Those figures are allegations drawn from the government’s reading of Amazon data and have not been adjudicated.

Second price, soft reserve, and the central dispute

In a simplified second-price example, an advertiser bidding a maximum of $5 might pay just over a roughly $2 competition-generated price. Under the complaint’s theory, a $4.25 Amazon-selected soft reserve could instead make the click charge $4.25, still below the $5 maximum. Real multi-position ad auctions can rank ads using relevance and quality, so this illustration is not a full model of Amazon’s system.

The core dispute is whether Amazon was using ordinary reserve pricing within an auction whose maximum charge advertisers understood, or secretly replacing a competition-generated result with a revenue-maximizing artificial price while continuing to promote second-price expectations. Read the detailed auction-mechanics explainer.

What Amazon says

Amazon says the government fundamentally misunderstands Sponsored Ads auctions. It emphasizes that relevance—not the largest raw-dollar bid alone—helps determine winners; advertisers understand their bids as maximum CPCs; reserve pricing is common; and older second-price explanations were simplified, low-reach, or outdated rather than a companywide promise. Amazon

Amazon also disputes harm. It says inflation-adjusted Sponsored Products CPCs were approximately flat from 2019 through 2024, conversion improved, and its relevance-based design produced better advertiser outcomes. Amazon further says its modeling indicates the FTC’s preferred counterfactual would have made advertisers about $8 billion worse off from 2021 through 2025. Those are Amazon’s claims, not court findings.

Amazon’s relevance argument and the government’s alleged post-auction pricing theory address related but distinct questions. Whether the evidence supports either side—and whether any disclosure was misleading—remains for litigation.

Financial impact and potentially affected advertisers

The government estimates approximately 1.2 million U.S. advertising customers were affected, including more than 500,000 small and medium-sized businesses, and alleges tens of billions of dollars in excess charges. That estimate is neither a judgment nor a proven loss figure, and it does not mean 1.2 million advertisers are eligible claimants. Federal Trade Commission

Potentially relevant account types may include third-party sellers, vendors, brands, KDP authors, and agency-managed advertisers. Whether a particular entity or campaign was affected is unknown. Location in one of the 22 plaintiff states is not necessarily the only possible geographic connection because the FTC is a federal plaintiff, while any state-specific remedy could have different limits. See who may be affected.

Could advertisers receive money?

The complaint seeks monetary relief, and state plaintiffs seek remedies that can include restitution or disgorgement. But no advertiser fund exists, no allocation method has been proposed, and no payment has been ordered. A future outcome could involve direct payments based on Amazon records, a claims process, credits, nonmonetary relief, no recovery, or another structure. None is guaranteed. California Department of Justice

• Refund status: no official program announced.
• Claim-form status: no official or court-approved form.
• Private litigation: separate from the government enforcement case.
• Arbitration: applicable Amazon advertising terms may affect private disputes.

Records advertisers may want to preserve

There is no current claim-document requirement. As a practical recordkeeping measure, advertisers may wish to retain materials that could later clarify account ownership, spend, and campaign history:

• Amazon Ads account identifiers, billing profiles, legal-entity names, and historical addresses;
• monthly invoices, transaction reports, spend, click, CPC, bid, placement, and campaign reports;
• Sponsored Products, Sponsored Brands, and Sponsored Display exports where available;
• agency-client agreements and records showing who paid advertising costs;
• versions of accepted advertising terms and relevant communications with Amazon.

These are preservation suggestions, not eligibility criteria and not legal advice. A future program, if any, could rely primarily on Amazon’s own records.

What remains unknown

• How Amazon will respond in court and what evidence discovery will make public.
• The precise products, auctions, accounts, and time periods any eventual ruling would cover.
• Whether the court will find deception, unfairness, causation, or advertiser injury.
• Whether the case will settle, proceed to judgment, or produce monetary relief.
• Whether advertisers would be paid automatically or asked to submit claims.
• How historical Amazon Advertising Agreement and arbitration provisions would affect private claims.

Follow the record

Start with the August 31 filing brief, then use the timeline and primary-document library. The official sources presently central to this tracker are the filed complaint, FTC case materials, and Amazon’s public response. Federal Trade Commission