A take rate is the proportion of advertising money passing through an intermediary that the intermediary retains. Expressed as a percentage of gross spend, it is the arithmetic gap between what an advertiser pays and what a publisher is paid at any single link in the chain. Demand-side platforms, exchanges, ad servers, curators and retail media networks each apply one. None creates the advertisement or the audience; all charge for the transaction.

The term matters because automated trading separated the media from the money. In a direct sale a publisher invoices an agency and both sides can read the figures. In a per-impression auction the price is discovered inside software and the deduction happens before either end sees a report.

How the number is calculated

The formula is simple: fee retained divided by gross spend transacted. Everything difficult sits in the denominator.

Accounting practice splits the calculation in two. Under agent treatment, an intermediary books only its fee as revenue and remits the rest to the seller, so the reported revenue line approximates the take. Under principal treatment, the whole media cost lands on the top line. Magnite states the distinction explicitly in its annual report: for most transactions it acts as an agent for the publisher and recognises revenue net of inventory costs remitted to sellers, while managed campaigns transacted through insertion orders are reported gross. Revenue reported on a gross basis fell from 18% of total revenue in 2023 to 14% in 2024 and 10% in 2025, a mix shift the company attributes to advertisers moving toward automated buying.

That distinction is why an SSP's revenue and an agency's revenue are not comparable quantities, and why the two most useful public take rates are derived rather than published. The Trade Desk discloses gross platform spend once a year alongside revenue. On $13.4 billion of gross spend and $2.896 billion of revenue in 2025, the ratio comes to roughly 21.6%. The 2024 figures, $12 billion and $2.44 billion, produce 20.3%.

On the sell side the deduction is applied to the clearing price. In a first-price auction the buyer pays the bid; the exchange subtracts its percentage and pays the publisher the remainder. A $10 CPM bid at a 20% take rate returns $8 to the publisher, and the floor the publisher set is tested against $8, not against $10. Google publishes the equivalent arithmetic for AdSense: publishers receive 80% of revenue after the buying platform takes its fee, and where Google Ads is the buyer, retaining an average of 15% of advertiser spend, the publisher keeps about 68% of the original dollar. AdSense for search pays 51%.

Fees compound because each layer charges separately and against a different base. Publisher ad servers bill a flat amount per impression, working out at roughly 1% to 2% of revenue for large publishers. Buy-side add-ons sit outside the platform fee: Display & Video 360's seller ID blocklist has carried an additional 1.5% charge. According to the complaint Teads filed in August 2026, Exchange Bidding charged 10% on video and 5% on other formats, levied on top of a rival exchange's own take rate and not applied to AdX.

Origin and evolution

The concept predates programmatic by a century. Agency commission was conventionally fifteen per cent of gross billings, a published rate deducted from money the agency handled on the advertiser's behalf. France legislated against the opaque version in 1993, when the Loi Sapin outlawed media broking and required buying margins to be disclosed.

Digital rates were set early and moved rarely. AdSense for content has paid publishers 68% since its 2003 launch, and AdSense for search 51% since 2005. AdX held a fee near 20% for more than a decade, a figure a Virginia court later treated as evidence of monopoly power. Google restructured the AdSense disclosure on November 2, 2023, splitting a single blended rate into separate buy-side and sell-side components without changing the net outcome for publishers.

Flexibility arrived quietly. Dynamic Revenue Share, introduced in 2014, let AdX cut its own fee on contested impressions and raise it on uncontested ones, preserving an average near 20%; Google rolled it out without disclosure and announced it publicly only in 2016. The mechanism was later condemned as sell-side dynamic revenue share in the same judgment that found the 20% average supracompetitive.

Measurement of the aggregate followed. The ISBA and PwC study published in 2020, covering roughly 100 million pounds of UK spend across 15 advertisers, 12 publishers and 11 platforms, found publishers receiving 51% of advertiser spend and 15% unattributable to any participant, a figure the authors called the unknown delta and put at close to a third of total supply chain costs. The 2022 follow-up, published in January 2023, cut the delta to 3% and lifted the publisher share by eight percentage points, though it excluded agency fees, verification and ad serving, forcing a restatement of the 2020 figures to 57% and 17%. In December 2023 the ANA reported that 36% of post-transaction programmatic budget reached valid, viewable, measurable and non-MFA impressions.

Why the percentage is contested

Take rates are the clearest lever in a market where few other costs are negotiable, and have become the axis of competition. Amazon charges roughly 1% on open web publisher inventory and nothing on programmatic guaranteed deals against its own media, pricing that helped move an $80 million annual budget away from The Trade Desk by the first quarter of 2025. The comparison is not like for like. The Trade Desk does not disclose a rate; its own annual reporting implies 19% to 21% since 2017, while Needham and Co. has attributed a 12% to 15% range to the platform. Headline platform fee and all-in take are different measures, and the gap has never been reconciled publicly.

Aggregate leakage keeps the subject live. IAB Spain's supply-side platform guide, published on April 15, 2026, cited the ANA Programmatic Transparency Benchmark 2025 in reporting that 41% of programmatic investment reaches genuine, measurable, viewable impressions, with 26.1% consumed by DSP fees, data costs and SSP costs. Sovrn told AdExchanger in October 2024 that publishers retain 36 cents of the media dollar, and that customers moving from revenue share to a flat impression-based fee saved an average of 48% on ad tech costs.

Limitations and disputes

Stacking is the operational complaint. A platform can levy a platform fee, a data fee, a brand safety fee and a targeting fee as separate line items, each defensible alone. Publicis pulled The Trade Desk from its recommended list in March 2026after a FirmDecisions audit concluded the platform had applied its own fee on top of other charges and enrolled clients in fee-bearing products without documented authorisation. The Trade Desk denied the characterisation and the two issued a joint resolution on June 12, 2026 that left the underlying billing architecture undescribed. Dentsu and WPP had exited OpenPath, which carries a flat 4.5% publisher fee, the previous month over comparable concerns.

Variability is the structural one. Index Exchange announced Transparent Dynamic Take Rates on October 23, 2025, cutting its fee on individual impressions so bids falling marginally short still clear and recovering the difference on competitive auctions later in the billing period; the Guardian recorded a 4% revenue increase and 45% more impressions served against a control group. "The dynamic take rate model made it easy to understand how value was being exchanged," said Dave Strauss, vice president of revenue operations and strategy at the Guardian. The arithmetic is close to Dynamic Revenue Share; the difference claimed is impression-level audit logs and a commitment that the average stays at the contracted rate.

A lower rate is also not automatically a better outcome. Jeff Green has argued that rates cannot be compared in isolation, because competitors bundle fees with media they own and a fee paid for stronger decisioning can return more than a cheaper route clearing worse inventory. Decisioning quality, though, is unverifiable in a way a percentage is not, so auditors reward whichever number is smallest and visible.

Adjacent terms

Margin measures what survives an intermediary's own costs. Take rate measures gross spend retained before any of them, which is why a 20% take rate and a thin operating margin coexist comfortably.

Revenue share is the same arithmetic read from the other end. Publisher contracts state the share the publisher keeps; platform disclosures state the share retained. An 80% revenue share and a 20% take rate describe one deduction.

Ad tech tax is cumulative rather than individual, summing every fee between budget and impression. No single participant charges it.

Commission in affiliate and retail media is a percentage of order value on a completed sale, not of media spend. Etsy's Offsite Ads charge 15% of an attributed order below a $10,000 sales threshold and 12% above it, capped at $100 per order.

Recent developments

Litigation has not moved the headline number. A federal judge in Virginia declined to order divestiture of AdX on September 2, 2026, accepting behavioural remedies instead; the supply path and the take rate were unchanged the following day. Jason Kint of Digital Content Next argued the same week that the burden has shifted from proposal to enforcement.

Compression is arriving from product rather than from courts. Rivals have begun wrapping programmatic guaranteed deals in agentic workflows at 1% fees, Viant launched a publisher transparency portal in June 2026 at no charge against OpenPath's 4.5%, and curation fees are falling as the function migrates from a chargeable category into supply-side infrastructure that platforms include to win integrations.

Timeline

  • 1993: France's Loi Sapin outlaws media broking and mandates disclosure of buying margins
  • 2003: AdSense for content launches with a 68% publisher revenue share
  • 2005: AdSense for search revenue share set at 51%
  • 2008: Google completes the DoubleClick acquisition; AdX subsequently holds a fee near 20% for more than a decade
  • 2014: Dynamic Revenue Share begins flexing the AdX fee per impression while preserving a near-20% average
  • 2016: Google discloses Dynamic Revenue Share publicly
  • May 2020: ISBA and PwC report publishers receiving 51% of advertiser spend, with a 15% unknown delta
  • January 2023: The second ISBA and PwC study cuts the unknown delta to 3%
  • November 2, 2023: Google splits the AdSense revenue share into separate buy-side and sell-side rates
  • December 2023: The ANA finds 36% of post-transaction programmatic budget reaching valid, viewable, measurable, non-MFA impressions
  • October 14, 2024: Sovrn eliminates revenue share for its sales house product in favour of a flat impression-based fee
  • April 17, 2025: A Virginia court finds an AdX fee near 20%, held for more than a decade, to be supracompetitive
  • October 23, 2025: Index Exchange announces Transparent Dynamic Take Rates
  • February 20, 2026: Dentsu and WPP are reported to have exited OpenPath over fee and transparency concerns
  • February 25, 2026: The Trade Desk reports $13.4 billion of 2025 gross platform spend against $2.896 billion of revenue
  • March 2026: A FirmDecisions audit prompts Publicis to advise clients to stop transacting on The Trade Desk
  • April 15, 2026: IAB Spain publishes a supply-side platform guide measuring transaction costs at 26.1% of programmatic investment
  • June 12, 2026: Publicis and The Trade Desk issue a joint statement resolving the fee dispute
  • September 2, 2026: A federal judge declines to order divestiture of AdX, leaving its take rate unchanged

Summary

Who. Demand-side platforms, exchanges and supply-side platforms, ad servers, curators, retail media networks and agencies all charge one. Advertisers, agencies and publishers pay it. Auditors including FirmDecisions and Ebiquity test it, trade bodies including the ANA, ISBA and IAB Spain measure it in aggregate, and courts have treated it as evidence in antitrust proceedings.

What. The share of gross advertising spend an intermediary keeps as revenue, calculated as fee retained over spend transacted. It may be a fixed contracted percentage, a flat CPM, or a rate that varies per impression, and it is distinct from margin, from the publisher-facing revenue share that describes the same deduction, and from the cumulative ad tech tax of every hop combined.

When. The percentage model dates to agency commission of fifteen per cent on gross billings, was regulated in France from 1993, was set for AdSense in 2003 and 2005, and became dynamic at AdX from 2014. Independent measurement began with the ISBA and PwC study in 2020 and continued through the ANA work in 2023 and IAB Spain's guide in April 2026.

Where. At every layer between a media budget and an impression, on both sides of the auction, in open exchanges, private marketplaces, guaranteed deals and direct supply paths.

Why. It is the difference between what an advertiser spends and what a publisher earns, and in most transactions it is the only cost either side can negotiate. Disclosure remains uneven: some rates are published, some are derivable from annual filings, and several of the largest are neither.