FTC Sues Amazon Over Alleged $20 Billion Advertising Surcharge Scheme — a major advertising industry dispute that raises questions about auction pricing, advertiser costs, and transparency in digital advertising. The Federal Trade Commission (FTC) and attorneys general from 22 states have sued Amazon, alleging that changes to its advertising auctions caused advertisers to incur more than $20 billion in additional costs.
The FTC claims that Amazon introduced pricing mechanisms that increased the amount advertisers paid for certain ad placements without adequately explaining the changes. Amazon disputes these allegations and argues that its auction model improves advertising relevance and performance.
The case could have important implications for businesses that rely on Amazon Ads and other pay-per-click (PPC) platforms. In this article, we explain the allegations, Amazon’s response, and what advertisers should know while the lawsuit moves through the legal process.
What Is the FTC’s Lawsuit Against Amazon About?
The FTC’s lawsuit focuses on how Amazon calculates the prices advertisers pay for sponsored advertising placements.
According to the allegations, Amazon changed its auction pricing system in 2019 by introducing a mechanism known as a soft reserve price. The FTC argues that this mechanism could increase the final cost paid by a winning advertiser, even when competing bids did not require a higher price.
The agency estimates that the alleged practices generated more than $20 billion in additional advertising costs. This figure represents the FTC’s claim, not a final court finding.
Amazon denies that its auction practices unfairly harmed advertisers and has challenged the agency’s interpretation of its pricing system.
Why Advertising Auction Pricing Matters
Digital advertising platforms use auctions to determine which advertisements appear and how much advertisers pay.
Advertisers typically set a maximum bid that represents the most they are willing to pay for a click or another advertising outcome. The actual price can depend on competition, ad relevance, placement requirements, and the platform’s auction rules.
Auction pricing affects several important business decisions:
- How much to bid for sponsored placements.
- How to distribute advertising budgets.
- Whether campaigns remain profitable.
- How to improve return on ad spend (ROAS).
- When to adjust bids or pause underperforming campaigns.
If advertisers misunderstand how the final price is calculated, they may find it more difficult to evaluate their costs and make informed bidding decisions.
Understanding Amazon’s Soft Reserve Price
A soft reserve price is a pricing threshold that can influence the final cost of an advertising placement.
The FTC alleges that Amazon’s use of soft reserve prices changed how the platform calculated winning advertisers’ costs. According to the complaint, internal auction mechanisms included terms such as an “invented auction participant” and a “proxy 2nd price.”
The dispute concerns whether Amazon adequately disclosed how its auction mechanics worked and whether the changes caused advertisers to pay more than they otherwise would have paid.
How a Soft Reserve Price Could Affect Advertising Costs
Consider a simplified example.
An advertiser sets a maximum bid of $2 per click. Under one auction structure, the final cost might be $1.20 because of the competitive conditions. Under another pricing mechanism, the advertiser might pay closer to the full $2 bid if the applicable reserve price determines the final charge.
These numbers are illustrative and do not describe a verified Amazon transaction.
The important distinction is that an advertiser may not have paid more than its maximum bid, yet it could still have paid more than expected under its understanding of the auction.
That is central to the FTC’s allegations.
What the FTC Claims About Full-Bid Payments
The reporting accompanying the lawsuit cited the following figures for Amazon Sponsored Products advertisers paying their full bids:
- 2021: Approximately 30%–40%.
- 2022: Approximately 70%.
- 2024: Approximately 80%.
The FTC argues that the pricing changes contributed to more than $20 billion in additional advertising costs.
These figures reflect allegations reported in connection with the case. The court will need to evaluate the evidence before determining whether the conduct was unlawful and whether advertisers suffered compensable harm.
Amazon’s Response to the Advertising Surcharge Allegations
Amazon disputes the FTC’s claims and argues that the agency misunderstands how its advertising auctions work.
The company acknowledges using soft reserve prices but maintains that these mechanisms help determine the market value of individual advertising placements. Amazon also says its system considers advertising relevance and predicted performance.
Amazon’s Key Arguments
In its public response, Amazon cited several performance figures to support its position:
- Average winning bids for Sponsored Products search ads reportedly fell by 50% between 2019 and 2025.
- Inflation-adjusted average cost per click reportedly remained flat from 2019 through 2024.
- Conversion rates reportedly increased by 24% between 2021 and 2025.
- Amazon estimated that its relevance-based auction model saved advertisers more than $8 billion between 2021 and 2025.
These figures are attributed to Amazon’s statements and should not be interpreted as independent findings resolving the dispute.
Amazon argues that advertisers make bidding decisions based on actual costs, conversions, and campaign returns. The FTC, meanwhile, argues that advertisers may have made different bidding decisions if the pricing mechanisms had been adequately disclosed.
Why the Disagreement Matters
The case raises a broader question about advertising transparency.
The FTC’s position is that the way a platform explains its auction system can influence how advertisers set their maximum bids. Amazon’s position is that its auction model provides value through relevance and performance.
The legal proceedings will need to assess the evidence, the information provided to advertisers, and the alleged financial impact.
Until a decision is reached, the FTC’s allegations and Amazon’s defense should be treated as competing positions.
How the Lawsuit Could Affect Digital Advertising
The Amazon advertising lawsuit highlights the importance of understanding how digital advertising platforms calculate costs and communicate changes to their systems.
Although advertisers can review many performance metrics, they may not have complete visibility into every factor behind an auction result.
1. Greater Attention to Advertising Transparency
Businesses depend on clear information about how their bids translate into advertising costs.
Transparent pricing explanations can help advertisers understand whether changes in CPC are related to competition, seasonal demand, platform settings, or other factors.
The case could increase industry attention on how advertising platforms disclose changes to auction mechanics.
2. More Careful PPC Budget Management
Advertisers should review campaign performance regularly instead of relying on a single metric.
Important metrics include:
- Cost per click (CPC).
- Conversion rate.
- Cost per acquisition (CPA).
- Return on ad spend (ROAS).
- Advertising cost of sales (ACOS).
- Revenue and profit margins.
Monitoring these metrics can help businesses identify unexpected cost changes and evaluate whether their campaigns remain profitable.
3. Better Understanding of Automated Advertising
Automated bidding can help manage campaigns at scale, but automation does not remove the need for human oversight.
Advertisers should understand their campaign goals, budget limits, conversion tracking, and the information available in their reporting dashboards.
The lawsuit is a reminder that campaign performance should be evaluated using business results as well as platform-reported metrics.
What Amazon Advertisers Should Do Now
The lawsuit does not automatically require advertisers to stop running Amazon Ads or change their campaigns.
Instead, businesses can take practical steps to improve reporting and preserve historical information.
Review Historical Campaign Data
Keep records of advertising performance for the periods relevant to your business.
Useful data includes:
- Campaign and product-level expenditure.
- Bids and average CPC.
- Impressions and clicks.
- Attributed sales and conversion rates.
- ACOS and ROAS.
- Budget adjustments and campaign settings.
These records can help advertisers understand historical trends and support more informed business decisions.
Compare Advertising Costs Across Periods
Compare campaign performance over consistent time periods. Consider seasonal demand, competition, inventory, product prices, and changes in conversion rates.
Major shopping events such as Prime Day and Black Friday can increase competition for advertising placements.
An increase in CPC alone does not prove that a specific auction mechanism caused the change. Advertisers should examine several metrics before drawing conclusions.
Evaluate Profitability Instead of Click Costs Alone
A higher CPC does not automatically mean a campaign is unprofitable. Strong conversion rates and healthy margins can help offset higher click costs.
Similarly, inexpensive clicks do not guarantee profitable results.
Businesses should evaluate advertising using revenue, profit margins, customer acquisition costs, and incremental sales where reliable measurement is available.
Follow Official Legal Updates
Advertisers should monitor official announcements from the FTC and Amazon as the case progresses.
Businesses should not assume they are eligible for reimbursement simply because they advertised on Amazon during the period covered by the allegations.
Companies concerned about potential financial exposure can preserve relevant records and consult qualified legal counsel.
Could Advertisers Receive Compensation?
The FTC is seeking monetary relief as part of the lawsuit, according to the reporting provided. However, it is too early to determine whether individual advertisers will receive compensation or how any remedy might work.
Any compensation would depend on the legal outcome and the terms of a court order or settlement, if one occurs.
Advertisers should continue maintaining accurate records rather than assuming that a refund or reimbursement is guaranteed.
How Does the Amazon Case Compare With Other Advertising Lawsuits?
Amazon is not the only major technology company to face legal scrutiny involving digital advertising.
Google has faced antitrust litigation involving advertising technology markets, while Meta has faced legal challenges involving advertising metrics and their representation to customers.
These cases involve different facts and legal questions, so they should not be treated as proof of the allegations against Amazon.
However, they highlight the importance of transparency, reliable reporting, and clear explanations of the systems businesses depend on when purchasing digital advertising.
What Happens Next in the FTC Lawsuit?
The case remains subject to the legal process, and Amazon has indicated that it intends to contest the FTC’s allegations.
The proceedings will need to consider how Amazon represented its auction mechanics, whether the challenged practices violated applicable law, and whether the alleged financial harm can be established.
The case may take considerable time to resolve, depending on the evidence, court proceedings, and any appeals.
Its outcome could provide additional clarity about the information advertising platforms must provide when their pricing systems affect advertisers’ costs.
Advertisers should distinguish between the claims made in the lawsuit, Amazon’s response, and any final findings by the court.
Frequently Asked Questions (FAQs)
1. Why did the FTC sue Amazon over advertising costs?
The FTC and attorneys general from 22 states allege that changes to Amazon’s advertising auction system caused advertisers to incur more than $20 billion in additional costs. Amazon disputes the allegations, and the court must assess the evidence.
2. What is Amazon’s soft reserve price?
A soft reserve price is a pricing threshold that can influence the final cost of an advertising placement. The FTC alleges that Amazon’s use of this mechanism increased certain advertising costs without adequate disclosure. Amazon argues that its auction system reflects the value and relevance of advertising placements.
3. Will Amazon advertisers automatically receive refunds?
No. The lawsuit does not automatically entitle advertisers to refunds. Any compensation will depend on the legal outcome and the terms of an applicable remedy or settlement.
4. How can advertisers monitor their Amazon advertising costs?
Advertisers can track CPC, conversion rate, ACOS, ROAS, attributed sales, and profit margins. They should compare consistent reporting periods and account for seasonal demand and changes in competition.
5. What does this lawsuit mean for PPC advertising?
The case highlights the importance of auction transparency, reliable reporting, and informed budget decisions. It may influence discussions about how advertising platforms communicate pricing mechanisms and changes to their systems.
Conclusion
The FTC Sues Amazon Over Alleged $20 Billion Advertising Surcharge Scheme case places digital advertising transparency under scrutiny. The FTC alleges that Amazon’s auction changes resulted in significant additional advertising costs, while Amazon maintains that its pricing model benefits advertisers.
Although the legal outcome remains uncertain, the case offers an important lesson for PPC marketers: understand your advertising costs, maintain reliable historical data, and measure campaigns against meaningful business results.
For businesses investing in digital advertising, transparency and accountability are essential to making informed decisions. By monitoring campaign performance and following verified legal developments, advertisers can remain prepared without making premature assumptions about the allegations or their potential consequences.