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    In-House Programmatic

    Programmatic Advertising 2020–2026: What Changed and Why

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    By Art Kukharenko

    Programmatic Advertising 2020–2026: What Changed and Why

    Programmatic advertising has expanded from automated media buying into a broader question of control over data, decisioning and the supply chain. This guide compares those operating changes and the evidence behind them. Separate historical observations from current vendor claims before using the comparison to choose an infrastructure or buying model.

    Key facts

    • A little under half of each dollar does its job. In Q2 2026, 45.1% of programmatic spend in the ANA benchmark reached impressions that were fraud-free, measurable, viewable and not on made-for-advertising sites, up 1.8 points from 43.3% in Q1 2026 (ANA via Fiducia, 6 August 2026). In 2023 the figure was 36 cents (ANA, Programmatic Transparency page, accessed 17 October 2026).
    • Fees are about a quarter of spend; quality losses are the rest. The Q3 2025 cost waterfall shows DSP platform fees of 6.0%, DSP data costs of 2.7% and SSP platform fees of 12.8%, leaving seller revenue at 76.2% of spend before non-viewable, non-measurable, invalid and MFA impressions are removed (ANA Benchmark, Q3 2025).
    • The UK regulator's estimate is 35p in the pound. The CMA, using 2019 fee data from the major intermediaries, found "publishers receive around 65% of the initial expenditure by advertisers (ie the overall 'adtech take' is around 35 pence from every pound that is spent)" (CMA, Appendix R, 1 July 2020).
    • Matched log data finds more tax than vendor-reported fees. ISBA and PwC matched 31 million impressions end to end and found publishers received 51% of advertiser spend, with 15% an "unknown delta" that no intermediary accounted for (ISBA, May 2020). The second study cut the unknown delta to 3% (ISBA, 18 January 2023).
    • The same SSP can charge the same publisher anything from 7% to 42%. Adalytics observed one SSP charging "between a 7 and 42% supply fee from different impressions served for a specific publisher", with a median SSP fee of about 20% across most SSPs and outliers "nearly 99%" (Adalytics, April 2022).
    • The gap between good and bad buyers is larger than the tax itself. Higher-performing advertisers in the ANA benchmark converted 52.3% of spend into quality impressions in Q2 2026 against 31.1% for the lower cohort, a 21.2-point gap (ANA via Fiducia, 6 August 2026).

    Definition

    Programmatic advertising uses software to automate aspects of media buying and selling, including inventory discovery, auction decisions, delivery and reporting.

    Evaluate the workflow

    1. The Strategic Shift: From Buying Inventory to Governing the Chain

    Three structural drivers explain this shift:

    1) Tracking Degradation → Rise of First-Party Data & Clean Rooms

    With third-party cookies fading and mobile identifiers restricted, brands increasingly rely on first-party data, consent frameworks, and privacy-safe identity systems. This shift is widely documented in industry frameworks such as the Global Media Charter published by the World Federation of Advertisers (WFA), which calls for responsible data use, transparency, and measurable accountability.

    Source: WFA Global Media Charter (2023)

    2) The "Unknown Delta" in the Programmatic Supply Chain

    Source: ISBA/PwC Programmatic Supply Chain Transparency Study

    Later, the Association of National Advertisers (ANA) demonstrated that with impression-to-impression log-level matching, this gap could be dramatically reduced when full data access is granted.

    Source: ANA Programmatic Media Supply Chain Transparency Study

    The conclusion is clear: transparency is technically achievable, but only contractually enforced.

    3) Budget Migration to CTV and Retail Media

    As budgets move into CTV, streaming, and retail media networks, brands require unified measurement and contractual clarity across walled gardens and open web ecosystems. Programmatic is no longer a tactical channel , it is the connective tissue across all digital media.

    2. Programmatic Is No Longer a Black Box , It Is Infrastructure

    The defining shift: advertisers are no longer asking for "optimization." They are demanding provability.

    This governance-first mindset is increasingly formalized through frameworks like the WFA Global Media Charter and in-housing guidance from the Interactive Advertising Bureau (IAB).

    Source: IAB Programmatic In-Housing Whitepaper

    3. How Global FMCG Brands Operationalized Programmatic

    A. The Typical Evolution Path

    Stage 1: Agency-Led, Advertiser Demands Transparency

    Brands standardized contracts:

    • Full fee disclosure
    • Audit rights
    • Log-level data access
    • Restrictions on unauthorized reselling
    • Brand safety enforcement

    Source: Adobe Blog , P&G's 5-Step Programme (DMEXCO 2017)

    Stage 2: Hybrid Model , Strategy Inside, Execution Partly Outside

    This in-housing trend is directly documented by IAB research.

    Stage 3: Internal Trading Desks in Key Markets

    Brands such as L'Oreal and Diageo have publicly discussed expanding internal programmatic capabilities.

    4. The Organizational Model: What They Actually Built

    1. Data & Insight Centers

    Unilever's "People Data Centres" (PDC) are one of the most cited internal transformations. Public materials and reports show that PDCs aggregate social listening, CRM, and digital data, operate in multiple global markets, and feed real-time audience insights into media planning.

    Sources:

    2. Identity Experiments in a Post-Cookie World

    Source: The Trade Desk , Unilever UID2 Case Study

    3. Supply-Path Optimization

    Large advertisers increasingly:

    • Reduce intermediaries
    • Enforce ads.txt / sellers.json standards
    • Use curated marketplaces
    • Build allowlists

    This shift is widely attributed to advertiser pressure following transparency studies such as ISBA/PwC and ANA.

    5. Corporate Mechanics: What Must Be Written into Policy

    Leading advertisers formalized governance structures including:

    Governance Framework

    Media Governance BoardMarketing, Procurement, Legal, Privacy, Finance, Security
    Data PolicyConsent handling, retention limits, sharing restrictions, clean room usage
    Transparency ProtocolsAudit rights, log-level access, explicit fee schedule, arbitrage restrictions
    Brand Safety StandardsPre-bid filters, post-bid reporting
    Measurement CharterDefinition of incrementality, MMM vs MTA vs experiments, metric ownership

    6. For Brands Entering Programmatic Today: A Practical Technology Checklist

    Phase 1: Transparency Before Scale

    First Action: Contractual and Data Control

    You must secure:

    • Fee disclosure
    • Log-level data access
    • Impression-to-impression matching rights
    • Audit authority
    • Restrictions on unauthorized reselling

    Use the ISBA/PwC and ANA findings as business justification.

    Third Action: Start with a Clean Supply Path

    Begin with:

    • Private marketplace (PMP) deals
    • Curated marketplaces
    • Controlled publisher allowlists

    Simultaneously:

    • Implement holdout tests
    • Run geo experiments
    • Define decision rules

    Scale only after transparency and measurement are operational. For infrastructure sizing guidance, see Self-Hosted DSP: Infrastructure Requirements & Sizing Guide.

    Conclusion: Programmatic Is Corporate Infrastructure

    The market no longer rewards opacity or blind optimization. It rewards:

    • Data ownership
    • Contractual rigor
    • Measurable incrementality
    • Controlled supply paths
    • Identity resilience

    The lesson from Unilever, P&G, L'Oreal, and Diageo is consistent across all published sources:

    Programmatic transparency is not a media tactic. It is corporate governance applied to advertising.

    Read the current references

    Read the in house programmatic guide for the broader decision framework.

    FAQ

    What is the ad tech tax? The share of an advertiser's programmatic spend retained by intermediaries between advertiser and publisher: agency, ad server, DSP, data, verification, exchange or SSP, supply-side services and publisher ad server. The UK CMA estimated it at about 35p in every pound on 2019 data, with publishers receiving about 65% (CMA, Appendix R, 1 July 2020). The ANA's benchmark measured transaction costs at 27.2% of spend in Q2 2026 (ANA via Fiducia, 6 August 2026).

    What percentage of programmatic ad spend reaches publishers? Between half and three quarters, depending on the study. ISBA and PwC found 51% in 2020 with a 15% unknown delta (ISBA, May 2020); the CMA found about 65% on 2019 data (CMA, Appendix R, 1 July 2020); the ANA's Q3 2025 waterfall put seller revenue at 76.2% (ANA Benchmark, Q3 2025). The ANA figure excludes agency fees, which is one reason it is highest.

    What does working media mean in programmatic? In the ANA benchmark it means spend that bought a TrueImpression: one that is "non-IVT, measurable for viewability, and viewable" (ANA Benchmark, Q1 2025), with made-for-advertising inventory also excluded in the 2026 definition (ANA, 27 May 2026). That was 45.1% of spend in Q2 2026. Other studies use the term for money reaching the publisher, which is a higher number. Agencies use it for the media line of a marketing budget as opposed to fees.

    What did the ANA programmatic transparency study find? The 2023 study found that only 36 cents of each dollar entering a DSP reached a consumer, that transaction costs took 29 cents and media productivity losses 35 cents, and that about $22 billion of an $88 billion open-web market was wasted, across 21 advertisers, $123 million and 35.5 billion impressions (ANA, December 2023). The quarterly benchmark that followed reported 43.9% in Q4 2024 (ANA, 12 December 2024) and 45.1% in Q2 2026 (ANA via Fiducia, 6 August 2026).

    How do I measure my own ad tech tax? Get direct contracts with your DSP, SSPs and verification vendor, obtain impression-level logs from each, match the records, and build the waterfall from gross spend to quality impressions. ISBA's second study raised its match rate to 58% using a standard data fields list (ISBA, 18 January 2023); the ANA benchmark offers members a continuous version of the same reconciliation (TAG TrustNet, 17 June 2024). The eight steps above are the full method.

    How this works on owned infrastructure

    AdSovereign provides an enterprise RTB stack for deployment inside a customer’s own infrastructure. Use the architecture to map the relevant components, the security controls to evaluate access and data boundaries, and the pilot to define a bounded evaluation. Compare the operating responsibilities and commercial terms against your own requirements. Infrastructure control does not establish demand access, legal permission or a measured performance improvement on its own.

    Sources

    1. Fiducia, "ANA Programmatic Transparency Benchmark: Q2 2026 Working-Media Efficiency Reaches a Record 45%" (ANA release of 6 August 2026). https://www.fiducia.eco/post/ana-programmatic-transparency-benchmark-q2-2026-working-media-efficiency-reaches-a-record-45
    2. ANA, "Programmatic Transparency Benchmark: Q2 2026 Benchmark Findings" (26 August 2026, gated). https://www.ana.net/miccontent/show/id/rr-2026-08-programmatic-transparency-benchmark-q2
    3. ANA, "ANA Programmatic Transparency Benchmark Reveals Widening Gap Between Top and Bottom Advertisers" (27 May 2026). https://www.ana.net/content/show/id/pr-2026-05-programmatic
    4. ANA, "ANA Introduces Brand Safety & Suitability Metrics, Achieves 99.1% Low-Risk Programmatic Spend" (5 November 2025). https://www.ana.net/content/show/id/pr-2025-11-transparency
    5. ANA and TAG TrustNet, "Programmatic Transparency Benchmark: Q3 2025 Benchmark Findings" (November 2025). https://s3.amazonaws.com/media.mediapost.com/uploads/Q32025ProgrammaticTransparencyBenchmark.pdf
    6. ANA and TAG TrustNet, "Programmatic Transparency Benchmark: Q1 2025 Benchmark Findings" (data to 31 March 2025). https://s3.amazonaws.com/media.mediapost.com/uploads/ANAQ12025Programmatic.pdf
    7. Measured, "ANA Finds $26.8B in Programmatic Waste: What Marketers Can Do Now" (15 August 2025). https://www.measured.com/blog/ana-finds-26-8b-in-programmatic-waste-what-marketers-can-do-now/
    8. ANA, "ANA Releases 2024 Programmatic Benchmark Study" (12 December 2024). https://www.ana.net/content/show/id/pr-2024-12-programmatic
    9. ANA, "Programmatic Media Supply Chain Transparency Study: Complete Report" (December 2023). https://www.adslot.com/wp-content/uploads/2023/12/ana-programmatic-media-supply-chain-transparency-study.pdf
    10. ANA, Media Practice, "Programmatic Transparency" page (accessed 17 October 2026). https://www.ana.net/content/show/id/media-programmatic-transparency
    11. TAG TrustNet, "ANA, TAG TrustNet Launch Programmatic Transparency Benchmark" (17 June 2024). https://www.tagtoday.net/pressreleases/ana-tag-trustnet-launch-programmatic-transparency-benchmark
    12. ExchangeWire, Shirley Marschall, "The Ad Tech Toll Road" (16 September 2026). https://www.exchangewire.com/blog/2026/09/16/the-ad-tech-toll-road/
    13. ISBA and PwC, "Programmatic Supply Chain Transparency Study, executive summary" (May 2020). https://www.isba.org.uk/system/files/media/documents/2020-12/executive-summary-programmatic-supply-chain-transparency-study.pdf
    14. ISBA, "Second programmatic supply chain transparency study" (18 January 2023). https://www.isba.org.uk/knowledge/second-programmatic-supply-chain-transparency-study
    15. UK Competition and Markets Authority, "Online platforms and digital advertising market study, Appendix R: fees in the adtech stack" (1 July 2020). https://assets.publishing.service.gov.uk/media/5fe49625e90e071207e10eff/Appendix_R_-_fees_in_the_adtech_stack_WEB.pdf
    16. Adalytics, "How much in fees are ad tech companies charging publishers & advertisers?" (April 2022). https://adalytics.io/blog/adtech-supply-fees
    17. AdExchanger, "The Takeaways On Crazy Take Rates" (daily roundup, 14 April 2022). https://www.adexchanger.com/ad-exchange-news/thursday-14042022/
    18. eMarketer, "eMarketer's New Ad Tech Tax Estimates Show One-Third of Spending Goes to Intermediaries" (August 2019). https://www.emarketer.com/content/emarketer-s-new-ad-tech-tax-estimates-show-one-third-of-spending-goes-to-intermediaries
    19. AdExchanger, "eMarketer: Ad Tech Gets A Tax Cut As Programmatic Fees Decline" (5 August 2019). https://www.adexchanger.com/analysts/emarketer-ad-tech-gets-a-tax-cut-as-programmatic-fees-decline/
    20. The Trade Desk, Inc., Form 10-K for fiscal year 2025 (filed February 2026). https://www.sec.gov/Archives/edgar/data/1671933/000167193326000014/ttd-20251231.htm
    21. PPC Land, "The Trade Desk launches data marketplace overhaul with AI scoring" (29 September 2025). https://ppc.land/the-trade-desk-launches-data-marketplace-overhaul-with-ai-scoring/
    22. Google, Display & Video 360 Help, "Tips for using third-party audience lists" (accessed 17 October 2026). https://support.google.com/displayvideo/answer/6212219?hl=en
    23. Microsoft Learn, "Log Level Data Feeds" (updated 22 October 2025). https://learn.microsoft.com/en-us/xandr/log-level-data/log-level-data-feeds

    Changelog

    • October 18, 2026: aligned the approved search title and heading; retained the original publication date.

    • October 17, 2026: updated search phrasing, source-linked reference context, author and dates. Withheld numerical claims without inline sources.

    What to read next

    Continue with the in-house programmatic reference guide.