Unified pricing rules (UPR) were the Google Ad Manager feature that set one minimum price across every source of non-guaranteed demand competing for an impression, so that no buyer faced a higher or lower hurdle than another. Google introduced them in 2019 alongside its shift to a single first-price auction. In December 2025 the company renamed them pricing rules and let publishers set floors by bidder, and a federal court has since ordered the old model deprecated and kept from returning.

A floor is the lowest CPM (cost per thousand impressions) a seller accepts for an impression. Publishers use floors to protect yield and to stop cheap demand from clearing valuable inventory. Ad Manager combines the DoubleClick for Publishers ad server (DFP) with the AdX exchange (Google Ad Exchange), and it is where Google applied these floors; PPC Land's explainer on DFP sets out how that server ranks demand.

How the rules worked

When an ad request reaches Ad Manager, guaranteed campaigns are weighed first. The remaining demand competes on price: bids from Authorized Buyers on AdX, Open Bidding partners, private auctions, First Look deals, header bidding bids entered through Google's trafficking route, and the remnant line item types Price Priority, Network and Bulk. According to Google's help centre, the rules also reach AdSense backfill and SDK bidding. Programmatic Direct campaigns, House line items and line items with a zero rate sit outside them.

A rule pairs inventory targeting - ad unit, geography, device, key-values, sizes - with a price. If several rules match one request, the highest price applies; there is no priority order. Inside a single rule, a price set for everything competes with item-specific prices in the same way. Google's own example sets $3.00 for a travel advertiser on a 728x90 slot and $4.00 for everything, and the $4.00 prevails. The price takes one of three forms. A fixed floor rejects any bid beneath it. A target CPM, the default, lets Google's models move the floor request by request while aiming to hold an average. A beta option has Google set floors per query. The help centre caps a network at 200 rules.

Floors are measured after Google's revenue share. In the help centre's example, a $1.00 bid under an 80/20 split is worth $0.80 to the publisher, so any floor above $0.80 filters it. The highest surviving bid wins and, under first price, pays what it offered.

Buyers see only part of this. Ad Manager sends a floor to bidders in the bidfloor field of OpenRTB, the IAB Tech Lab's real-time bidding protocol, with durfloors for video and audio durations. The figure is the lowest floor Google can guarantee will filter a bid. Floors tied to particular advertisers, brands or sizes are withheld because the creative is unknown at request time, though they still apply in the auction. PPC Land's price floor explainer covers the field and its Prebid counterpart. Publisher ad operations and yield teams configured the rules; traders at DSPs (demand-side platforms) and agencies met them only as a won or lost bid.

Origin and evolution

Before 2019, AdX ran second-price auctions under Open Auction pricing rules, which carried priority ordering and could set separate anonymous and branded floors, according to publisher-side guides of the period. Many publishers set higher floors on Google demand to offset what they saw as a data advantage, Search Engine Land reported.

Google announced a unified first-price auction on March 6, 2019. Sam Cox, group product manager for Ad Manager, saidall programmatic buyers would compete in one auction alongside direct deals, that the winner would pay its bid, and that the transition should finish by year end. A beta of the floor rules opened in April 2019 with a cap of 100 rules per network and advertiser-specific floors; AdExchanger reported publisher complaints that rules could not be set per platform and that 100 fell short for sellers used to hundreds.

In May 2019 Jason Bigler, then a director of product management at Google, wrote that legacy floor rules would end with the switch and that the new feature would reach publishers worldwide; Google was assessing whether 100 rules sufficed. The cap later rose to 200, the figure in current documentation, though the sources reviewed do not date the change. Pricing by creative type followed, allowing separate display and video floors.

Courts then took up the feature. Judge Leonie Brinkema's April 17, 2025 findings held that it was anticompetitive conduct under Section 2 of the Sherman Act. The European Commission fined Google 2.95 billion euros on September 5, 2025 for self-preferencing across the ad tech chain, and Google's November 13 reply offered behavioural fixes including an end to the rules. According to an analysis by the SCiDA project, the decision addresses them in paragraphs 1319 to 1328 and 1359.

In mid-December 2025 Google renamed the rules and added bidder-specific floors, Press Gazette reported, tying the launch to its Commission commitment covering display, video and app ads. Ad Manager API report dimensions bearing the old name were deprecated on January 12, 2026 and removed on May 7, 2026, according to Google's release notes.

Why the rules mattered

A floor is the main lever a seller holds in an auction, and this feature removed the option of pricing buyers differently. The Atlantic alleges that from 2019 Google barred differential floors across exchanges and advertisers. Raptive's complaintsays internal documents show the rules were meant to restrict revenue diversity, whereas Google had cast them as a way to level the field for advertisers. Both are allegations. The Virginia findings, as the Commission coverage records, were that the rules raised the impressions and revenue AdX won while lowering those of third-party exchanges, and a later ruling in the private cases lets plaintiffs rely on that finding.

Numbers give the stakes. Tim Simcoe, the plaintiffs' liability expert, calculated that ending the rules alone would cut AdX's take rate from 20 percent to roughly 16.6 percent, a level the court compared with some rival exchanges, as PPC Land reported from the opinion. In New York litigation, an estimate attributed to Hortacsu put the rules' win-rate gain at 6.48 percent and said matching it through fee cuts would have meant lowering the fee to 3.82 percent.

For buyers, the same impression can now carry different floors depending on the buying path. PPC Land's reading is that restored buyer-specific floors trade fill for price and return yield management to the publisher. Search Engine Land cautioned that win rates, CPMs and available inventory may shift with each advertiser's buying setup.

Limitations and disputes

The design carried constraints. It offered no per-bidder pricing, no priority ordering, a hard rule cap, and floors for specific items that bidders could not see. Publisher guides also noted the end of anonymous pricing.

Google's side contests the harm. Professor Milgrom, whose testimony Google cites, argued that publishers could still limit exposure by setting floors that recreated the older process, moving direct deals to sponsorship line items, or switching off Dynamic Allocation for chosen exchanges after the rules arrived.

The December 2025 withdrawal is disputed too. Jason Kint, chief executive of Digital Content Next, told members it was "likely an effort to demonstrate responsiveness and avoid stronger remedies", according to Press Gazette; Search Engine Land separately described him as calling it a meaningful if limited win. Scope remains open: Google's commitment named display, video and app ads, and PPC Land's own account of the order did not describe a regional limit. The same tally by Messer rated the deprecation provision low for both friction and publisher value, against a medium rating for restoring per-exchange floors.

Floors themselves cost volume. Higher minimums lift price but cut fill, and Prebid's documentation discourages static floors as a blunt instrument.

Not the same as

Unified first-price auction. The auction format, in which the winner pays its bid. Announced the same month as the floor rules, it outlived them.

Price floor. The generic minimum, set in ad servers, exchanges and wrappers such as Prebid. The Google feature was one implementation of it.

Open Auction pricing rules. The second-price predecessor tied to AdX, with priorities and separate anonymous and branded floors.

Dynamic revenue share. A fee mechanism that flexed the exchange's cut per impression, grouped with First Look and Last Look among the condemned practices. It adjusted Google's price to publishers; the floor rules restricted publishers' prices to buyers.

Recent developments

On September 2, 2026, Judge Brinkema refused to order a sale of AdX and adopted behavioural remedies. The 106-page opinion, public from September 16, requires Google to deprecate and not reimplement the rules in DFP for all indirect transaction types, lets publishers set different floors across buying tools and exchanges, and bars discounting DFP fees in return for uniform pricing. PubMatic's chief executive, Rajeev Goel, put the wider interoperability work at up to 15 months.

According to AdExchanger, the parties filed a 41-page set of proposed final judgments late on October 2, 2026. It reports no major disagreement on the core remedies and lists the rules among the banned practices; disputes centre on timing, global reach and monitor powers. The judge has yet to sign, a 60-day clock follows her signature, and Google is expected to appeal.

Timeline

  • March 6, 2019: Google announces a unified first-price auction for Ad Manager
  • April 2019: A beta of the floor rules opens, capped at 100 rules per network
  • May 2019: Google confirms legacy floor rules end with the first-price transition and the new feature reaches all publishers
  • April 17, 2025: Judge Brinkema finds Google monopolised the publisher ad server and ad exchange markets for open-web display
  • September 5, 2025: The European Commission fines Google 2.95 billion euros in its ad tech case
  • October 27, 2025: A federal judge in New York gives the Virginia findings preclusive effect in private damages litigation
  • November 13, 2025: Google proposes product changes to the Commission, including an end to the rules
  • Mid-December 2025: Google renames the feature pricing rules and enables bidder-specific floors
  • January 12, 2026: Ad Manager API report dimensions with the old name are deprecated
  • May 7, 2026: Those dimensions are removed
  • September 2, 2026: The court orders the rules deprecated, with a ban on reimplementation
  • September 16, 2026: The memorandum opinion becomes public
  • October 2, 2026: The parties file proposed final judgments

Summary

Who: Google, which operated the feature in Ad Manager; publishers and their ad operations teams; buyers on AdX, Open Bidding and header bidding routes; Judge Leonie Brinkema, the European Commission and private plaintiffs including The Atlantic and Raptive.

What: A floor-price system that applied one minimum across all non-guaranteed demand, with rules matched by inventory targeting, the highest matching price winning, and floors measured after revenue share. It was renamed pricing rules in December 2025 and is to be deprecated and not reimplemented under the September 2026 order.

When: Beta in April 2019, general use alongside the first-price transition that year, removal from December 2025, court order on September 2, 2026, proposed final judgments filed on October 2, 2026.

Where: Inside Google Ad Manager, applied to indirect demand on display, video and app inventory, with the court order reaching beyond the United States.

Why: Google presented the rules as a simplification for a unified auction, while courts and plaintiffs found they stopped publishers from pricing Google demand differently and helped AdX gain scale at the expense of rival exchanges.