FTC Amazon Advertising Lawsuit: 22 States Join Suit Over Hidden Ad Auction Surcharges

The FTC Amazon advertising lawsuit filed on August 31, 2026 accuses the company of quietly inflating what advertisers paid for Sponsored Products, Sponsored Brands and Sponsored Display placements for seven years. Amazon says the case is meritless. Either way, the filing exposes a problem Amazon sellers have had all along.

TRY DATA DIVE FREE

What does the FTC Amazon advertising lawsuit allege?

The case turns on one specific piece of auction design.

Amazon told advertisers it ran a second-price auction. In that model, if you bid $1.50 and the next-highest bidder comes in at $1.20, you win and pay $1.21, one cent above the runner-up. The design exists for a reason: it lets you bid what a click is genuinely worth without being punished for honesty, because you almost never pay your maximum.

According to the complaint, that stopped being true in 2019. The FTC alleges Amazon “changed its auction rules without notice,” introducing an undisclosed price floor applied after the auction had already run. They allege Amazon understood exactly what that floor did to advertiser pricing.

The complaint also describes the mechanism used to lift the clearing price: a bidder that, per the FTC, did not exist.

Elsewhere the filing cites internal descriptions of the practice as a “proxy 2nd price that we calculate,” a “clever non-transparent way to charge first price,” and an “incredibly effective way to drive revenue”. All alongside internal warnings about “irrevocable damage to advertiser trust.” Amazon disputes the characterization throughout.

Here are some key excerpts from the FTC complaint:

How much did it allegedly cost advertisers?

The complaint’s central number is a share, not a dollar figure. In 2021, the FTC says, 30–40% of Sponsored Products advertisers were charged their own full winning bid. By 2024, that was approximately 80%.

That shift is a shocking revelation to Amazon sellers. If most advertisers pay their maximum most of the time, a “max bid” is functioning as the price, not as a cap. Every incremental test bump becomes a full purchase, as opposed to a rising ceiling.

On scope, the FTC alleges the conduct affected more than one million brands and sellers, including over 500,000 small and medium-sized businesses, and amounted to “tens of billions of dollars.”

Press coverage puts the figure near $20 billion.

The complaint also says surcharges rose on ordinary days and increased far more during Prime Day and Black Friday. These windows are excatly where sellers concentrate budget.

If you are planning for Prime Day and Black Friday, our guide to maximizing Amazon deal day profits is worth a second read in that light.

FTC Chairman Andrew N. Ferguson, announcing the complaint, said Amazon “has millions of advertising customers who were misled into paying significantly higher prices.” The Commission vote was 2–0.

What is Amazon’s response to the FTC lawsuit?

So how is Amazon responding? Here are the key points.

“Advertisers adjust bids based on real-world performance, not descriptions of auction mechanics.”

— Amazon, responding to the FTC complaint

That is Amazon’s strongest point, and it deserves an honest answer. Experienced sellers do optimize toward outcomes such as ACOS, TACOS, unit velocity, not auction theory. However, if the mechanic underneath those outcomes shifted without notice, every benchmark built from those outcomes shifted with it. You would still be optimizing. You just would not know what you were optimizing against.

None of this has been proven. These are allegations in a civil complaint, Amazon disputes them, and no court has ruled.

Why does the FTC Amazon advertising lawsuit matter to sellers right now?

So why does this matter? Not because a refund is coming. Cases like this take years, and remedies rarely arrive as a check in a seller’s account. If your plan is to wait and see, that is not a plan. It matters because of what the filing reveals about the structure sellers operate inside.

Your ACOS history was calibrated against something you could not verify

Think about the decisions you made from advertising data. Break-even bid. Target ACOS by product. The keywords you wrote off as too expensive to chase. Each was calibrated against an effective cost-per-click that, per the complaint, contained an adjustment you were not told about. That does not automatically make those calls wrong. It makes them unverifiable, which is a different and more uncomfortable problem.

The standard response to weak ad performance is to spend more

When efficiency drops, the reflex (and often the console’s own recommendation) is a higher bid. That reflex is expensive when the clearing mechanic is not visible.

Peak events are where the exposure concentrates

The allegation that surcharges spiked hardest during Prime Day and Black Friday has the most operational bite. Those are the windows where sellers commit the most budget against the thinnest comparable data.

Is this a one-off, or a pattern?

We can see a clear pattern to this activity.

In late August 2026, Amazon began inviting FBA sellers to bid a per-unit amount to add products to its Sub Same-Day network — the 2-to-5-hour delivery service near roughly 2,300 metro areas. Amazon says products in that network see about 12% higher sales versus standard FBA where available. Participation is optional, and Amazon still places some products there for free.

Look at the shape of it. Advertising was the first variable Amazon turned into an auction. Delivery speed is now the second. It follows the same direction as Amazon’s new selection program and the steady tightening of listing rules like the 2026 title requirements: more variables set by Amazon, fewer set by you.

More of your margin is becoming something you bid for, in auctions whose mechanics you do not set and cannot inspect.

What should Amazon sellers do this week?

Five things. None require a lawyer, but all of them make money whether or not the FTC prevails.

1. Make organic-to-paid a tracked number

What percentage of your revenue arrives through a click you paid for? Most sellers cannot answer on demand. It is the cleanest measure of exposure to an auction you cannot audit, and revenue that never enters the auction is the only real hedge.

2. Establish an independent rank baseline first

You cannot detect a shift in your economics without a record of your own position over time that does not come from Amazon’s ad reporting. A baseline only helps if it predates the event you are trying to explain, which makes it a today job, not a next-quarter job.

3. Run your own incrementality test

This is the highest-value item on the list, but also risky. Pick eight to ten keywords where you already hold page-one organic placement. Pause paid on those keywords then measure total unit velocity, not ad-attributed sales, which will obviously fall, because you turned the ads off.

NOTE FROM DATA DIVE CEO and 8 FIGURE SELLER

4. Audit redundant spend by keyword root

The overlap between where you rank organically and where you are bidding is where budget quietly dies. It is also the fastest ACOS improvement available that does not involve touching a single bid.

5. Attack conversion rate, not just cost-per-click

If CPC is a variable you do not set, conversion rate is the variable you do. A listing that converts three points better absorbs an inflated click cost and still profits. Most sellers do not have an advertising problem, but rather a measurement problem, with a conversion problem underneath it.

How does Data Dive help Amazon sellers here?

Data Dive has over 10,000 active sellers, and there are key ways to leverage the tools within the software. 

Data Dive gives you is an independent record of the variables Amazon’s ad console does not own.

• Rank Radar tracks your organic keyword position daily — the independent baseline from step two, not sourced from the party selling you ads.
• Deep Dive & Niche Dive map the real keyword landscape from marketplace data, so campaigns get built on keywords you validated rather than keywords you were recommended. The Chrome extension runs that research in one click.
• Rank Radar plus keyword research surfaces the paid/organic overlap from step four: where you already rank, and where you are still paying to show up.
• AI Copywriter and listing optimization go after conversion rate — the variable the auction does not set. See how the AI Product Brief builds that from customer language.
• Competitor Price Tracker with Impact Reviews attributes a performance shift to a specific competitor event instead of a guess.
• Webhook alerts push rank and competitor changes straight to Slack, so a shift reaches you the day it happens.

The bottom line

The FTC alleges Amazon spent seven years quietly inflating what advertisers paid. Amazon says its auction saved advertisers billions and that the government has shown no consumer harm. A court will sort that out, slowly.

What you can sort out this month is simpler. You have been running a business on numbers supplied by your largest cost center, without an independent check. That was a structural risk before August 31, and it remains one afterward, whatever the verdict. You cannot fix Amazon’s auction. You can fix what you measure.

Frequently asked questions

What is the Amazon ad auction lawsuit about?

On August 31, 2026, the FTC and 22 state attorneys general sued Amazon in the U.S. District Court for the Western District of Washington (Case 2:26-cv-03097), alleging that from 2019 Amazon added undisclosed surcharges to its advertising auctions while telling advertisers it ran a second-price auction. The complaint alleges the conduct affected over one million brands and sellers and amounted to tens of billions of dollars. Amazon denies the allegations.

What is a “soft reserve price” in Amazon’s ad auction?

“Soft reserve price” is the term the FTC’s complaint says Amazon used internally for an undisclosed price floor applied after its advertising auctions ran. The complaint also describes an “invented auction participant” and a “proxy 2nd price that we calculate.” The allegation is that these raised the price winners paid above the true second-highest bid. Amazon disputes the characterization.

Did Amazon overcharge Sponsored Products advertisers?

The FTC alleges that by 2024 approximately 80% of Sponsored Products advertisers were charged their own full winning bid, up from 30–40% in 2021. Amazon denies wrongdoing and says advertisers saved over $8 billion from 2021 to 2025 because its auction weights ad relevancy rather than bid alone. The allegations have not been proven in court.

Will Amazon sellers get a refund from the FTC lawsuit?

There is no basis to expect one. The case was filed on August 31, 2026 and litigation of this type typically takes years. No remedy has been ordered, and sellers should plan their advertising economics on the assumption that nothing about their cost structure changes as a result.

How can Amazon sellers reduce their dependence on PPC?

Track organic-to-paid revenue ratio as a KPI, establish an independent daily organic rank baseline, run an incrementality test by pausing paid on keywords where you already hold page-one organic placement, eliminate redundant spend where paid and organic overlap, and invest in conversion rate through listing quality. These improve profitability regardless of the lawsuit’s outcome.

What is an incrementality test for Amazon PPC?

Choose eight to ten keywords where your product already ranks on page one organically, pause paid advertising on those keywords for fourteen days, and measure total unit velocity rather than ad-attributed sales. If total velocity holds steady, that paid spend was largely buying clicks you would have won organically.

What is Amazon Sub Same-Day bidding for sellers?

In late August 2026, Amazon began inviting FBA sellers to bid a per-unit amount to add products to its Sub Same-Day network, which delivers in 2–5 hours near roughly 2,300 metro areas. Amazon says products in the network see about 12% higher sales versus standard FBA delivery where available. Participation is optional and sellers pay only for units that ship through the service, at the price they bid.

Can Data Dive tell me if I was overcharged for Amazon ads?

No. Data Dive does not ingest Amazon advertising billing data and cannot determine whether any seller was overcharged. It provides independent measurement of organic keyword rank, the keyword landscape, competitor events, and listing conversion factors — the variables that do not come from Amazon’s advertising reporting.

Related reading

• Competitor Price Tracker with Impact Reviews — tie a performance shift to a specific competitor move.
• Amazon Title Changes: What Every Seller Needs to Do — protecting rank when your listing changes.
• How To Find Winning Products on Amazon — staying out of over-advertised categories in the first place.
• Data Dive Alerts Now Follow You — push rank and competitor alerts to Slack.

Sources

• FTC, States Sue Amazon Over Secret Ad Surcharge Scheme — Federal Trade Commission, August 31, 2026
• Complaint for Permanent Injunction, Monetary Judgment, and Other Relief (PDF) — Case 2:26-cv-03097, W.D. Wash.
• Amazon’s response to the FTC’s lawsuit regarding Sponsored Ads — About Amazon
• Amazon Lets Sellers Pay Extra for Sub Same Day Shipping — EcommerceBytes

This article describes allegations in a civil complaint filed by the Federal Trade Commission and 22 state attorneys general on August 31, 2026 (Case 2:26-cv-03097, W.D. Wash.). Amazon has publicly denied the allegations and no court has ruled on them. Nothing here is legal advice. Amazon’s advertising mechanics and program terms change over time — confirm current details in Seller Central before making any bidding or budget decision.