The Digital Markets Act is a European Union regulation that imposes binding conduct rules on a small set of very large technology companies in advance, rather than punishing them after a competition investigation concludes. Its formal name is Regulation (EU) 2022/1925 on contestable and fair markets in the digital sector. The rules apply only to firms the European Commission has designated as gatekeepers, and only to the services within those firms that meet the designation test. What separates the DMA from ordinary antitrust law is timing. Obligations attach on designation. No finding of abuse is required, and no company needs to be shown to have harmed anyone before the duties bite.

How a company becomes a gatekeeper

Article 3 sets quantitative presumptions. A company qualifies if it recorded annual Union turnover of at least €7.5 billion in each of the last three financial years, or held an average market capitalisation of at least €75 billion in the last financial year, and provides the same core platform service in at least three member states. It must also count at least 45 million monthly active end users located in the Union and at least 10,000 yearly active business users established in the Union. Roughly 10% of the EU population sits behind that 45 million figure.

Companies crossing those lines must notify the Commission within two months, and the Commission then has 45 working days to designate. It can also designate a firm that misses the numbers, through a market investigation assessing gatekeeper status qualitatively - the route now being used for cloud infrastructure.

Designation is granular. The DMA lists ten categories of core platform service: online intermediation services, search engines, social networking, video-sharing platforms, number-independent interpersonal communications services, operating systems, web browsers, virtual assistants, cloud computing and online advertising services. A firm can be a gatekeeper for one and not another. Advertising businesses are designated in their own right: Alphabet's online advertising service, Amazon Advertising and Meta Ads each carry the label separately from search, marketplace or social products.

What gatekeepers must do

Article 5 contains self-executing prohibitions and duties. Article 6 sets obligations the Commission may specify further through dialogue. Article 7 covers messaging interoperability.

Several are aimed squarely at the advertising supply chain. Article 5(2) bars gatekeepers from combining personal data across their own services, cross-using it, or processing end-user data collected from third-party services for advertising, without freely given consent that meets the GDPR standard. Legitimate interest and contractual necessity do not qualify.

Article 5(9) requires gatekeepers to give each advertiser, free of charge and daily, the price and fees paid for every ad, the remuneration received by the publisher where that publisher consents, and the metrics used to calculate both. Article 5(10) mirrors the duty toward publishers, covering remuneration received, fees deducted and prices advertisers paid. Where consent is withheld, the gatekeeper must supply daily averages instead. Article 6(8) grants advertisers and publishers free access to the gatekeeper's own performance measuring tools and the data required for independent verification of ad inventory.

The obligations that have generated enforcement so far sit elsewhere. Article 5(4) requires gatekeepers to let business users promote offers through channels outside the platform and conclude contracts there. Article 6(5) prohibits self-preferencing in ranking, indexing and crawling. Article 6(11) obliges search gatekeepers to share ranking, query, click and view data with rivals on fair, reasonable and non-discriminatory terms. Articles 6(9) and 6(10) cover data portability, and Article 6(12) requires published FRAND conditions for app store access.

Origin and evolution

The DMA grew out of frustration with the pace of conventional enforcement. The Commission's three antitrust decisions against Google - €2.42 billion over Shopping in June 2017, €4.34 billion over Android in July 2018, €1.49 billion over AdSense in March 2019 - each took years to reach, and the outcomes were litigated for years more. The AdSense fine was annulled outright by the General Court in September 2024. The Android penalty, cut to €4.1 billion, was locked in long after the conduct at issue had changed.

The Commission proposed the regulation on 15 December 2020, alongside the Digital Services Act. Political agreement followed on 25 March 2022. The text was signed on 14 September 2022, published in the Official Journal on 12 October 2022, entered into force on 1 November 2022 and became applicable on 2 May 2023.

On 6 September 2023 the Commission designated six gatekeepers covering 22 core platform services: Alphabet, Amazon, Apple, ByteDance, Meta and Microsoft. Compliance became mandatory on 7 March 2024. Booking joined as a seventh on 13 May 2024, the same day a market investigation opened into X. Apple's iPadOS was designated separately in April 2024, and Facebook Marketplace was undesignated on 23 April 2025 after the service changed.

Enforcement and the record so far

Fines can reach 10% of worldwide turnover, or 20% for repeated infringement. Periodic penalty payments run up to 5% of average daily worldwide turnover. Systematic non-compliance can trigger structural remedies, including divestiture or an acquisition ban.

The first decisions landed in April 2025, when the Commission fined Apple €500 million and Meta €200 million, €700 million combined. Apple's breach concerned anti-steering under Article 5(4). Meta's concerned the consent-or-pay model launched in November 2023, which the Commission found failed to offer a genuine less-personalised alternative under Article 5(2).

The largest action to date came on 23 July 2026, when the Commission fined Google €890 million and gave it 60 days to change its search results. The penalty split into €460 million for self-preferencing shopping, hotel, transport and sports results in Google Search, and €430 million for restricting Play developers from steering users to alternative offers. The compliance deadline falls on 21 September 2026.

Why it matters for the marketing community

For buyers, the consent rules in Article 5(2) determine what audience signal remains legal inside the EU. Automated products that select audiences across services, such as Performance Max and Advantage+, depend on data combinations the regulation now conditions on explicit permission. Draft joint guidelines from the Commission and the European Data Protection Board drew more than 100 public submissions after a consultation running from 9 October to 4 December 2025, with final text expected during 2026.

For sellers, Articles 5(9), 5(10) and 6(8) represent the first legal right to daily itemised pricing data and to independent verification inside walled gardens where measurement has historically been self-reported.

Visibility effects are already measurable. In March 2026, eighteen trade and consumer groups pressed the Commission to act on Google's search compliance, citing a 30% drop in clicks and a 36% fall in direct bookings for hotels in DMA-covered markets against markets outside them.

Limitations and disputes

Effectiveness is contested. An NBER working paper found that browser choice screens added roughly six million Firefox users in the EU while leaving Google Search near 90% share, with most contestability gains flowing to other American firms rather than European challengers.

Gatekeepers dispute both the design and the interpretation. Apple has said the Commission's reading "is constantly changing", and has withheld features including iPhone Mirroring and AirPods Live Translation from EU users, a position Commission spokesperson Thomas Regnier called a "lobbying paper to repeal the DMA". Google president of global affairs Kent Walker said the July decision "continues to break everyday products" as the company weighed an appeal.

Courts have trimmed the perimeter. On 3 June 2026 the General Court annulled Meta's Marketplace designation while upholding Messenger as a separate core platform service in case T-1078/23. Apple fared worse: on 8 July 2026 the same court dismissed all three of its challenges to App Store and iOS designation.

Speed remains the sharpest criticism. Proceedings against Google's search compliance opened in March 2025 and closed 16 months later. The Commission's first review report, published on 28 April 2026, concluded the regulation remains fit for purpose and proposed no legislative amendment, declining to add generative AI as a core platform service. Stakeholders had asked for higher fines and interim measures, and the report's silence on US trade pressure drew objections.

Disambiguation

Designated Market Area shares the abbreviation and appears constantly in US media buying, where Nielsen's DMA boundaries define television and audio geography. The two have nothing in common, as coverage of Meta ending Nielsen DMA support for automotive ads illustrates.

The Digital Services Act, proposed the same day, regulates content moderation, illegal material, advertising transparency and systemic risk across a far wider set of platforms. The DMA regulates competitive conduct by a handful of firms.

The GDPR governs personal data processing by every controller in the EU. Where the two overlap, on advertising consent, the DMA layers an extra condition on gatekeepers that applies to nobody else.

Article 102 TFEU, the general abuse-of-dominance prohibition, still applies to gatekeepers. It requires proof of dominance and effect, and operates after the fact.

Recent developments

Cloud infrastructure is the next frontier. Following three market investigations opened on 18 November 2025, the Commission reached a preliminary position on 25 June 2026 that Amazon Web Services and Microsoft Azure should be designated, citing entrenched positions and switching costs.

Under a specification decision reported in July 2026, Google must begin sharing search data with eligible rivals from January 2027, with Android interoperability features following in August 2027. Apple, meanwhile, is replacing its per-install Core Technology Fee with a 5% Core Technology Commission on 1 October 2026. Meta's 2026 compliance report confirmed WhatsApp Status and Channels advertising for the EU and a Less Personalised Ads option using 90% less data, while restating that it disagrees with the Commission's reading of Article 5(2).

Timeline

  • 15 December 2020: European Commission proposes the Digital Markets Act alongside the Digital Services Act
  • 25 March 2022: Parliament and Council reach political agreement
  • 14 September 2022: Regulation (EU) 2022/1925 signed into law
  • 12 October 2022: Published in the Official Journal
  • 1 November 2022: Entry into force
  • 2 May 2023: Regulation becomes applicable; two-month notification window opens
  • 6 September 2023: Six gatekeepers designated across 22 core platform services
  • 7 March 2024: Compliance obligations become binding
  • April 2024: Apple iPadOS designated
  • 13 May 2024: Booking designated; market investigation into X opened
  • 23 April 2025: Facebook Marketplace undesignated
  • April 2025: Apple fined €500 million, Meta fined €200 million
  • 18 November 2025: Three cloud market investigations opened
  • 28 April 2026: First DMA review report published
  • 3 June 2026: General Court annuls Meta Marketplace designation, upholds Messenger (T-1078/23)
  • 25 June 2026: Preliminary position that AWS and Azure should be designated
  • 8 July 2026: General Court dismisses Apple's designation challenges
  • 23 July 2026: Google fined €890 million for search self-preferencing and Play anti-steering
  • 21 September 2026: Google compliance deadline
  • 1 October 2026: Apple's Core Technology Commission takes effect
  • January 2027: Google search data sharing with eligible rivals begins

Summary

Who: The European Commission enforces the regulation against seven designated gatekeepers - Alphabet, Amazon, Apple, Booking, ByteDance, Meta and Microsoft - with Amazon Web Services and Microsoft Azure facing preliminary designation as of June 2026. Advertisers, publishers, app developers and comparison services are the intended beneficiaries.

What: Regulation (EU) 2022/1925, a set of ex ante obligations and prohibitions covering self-preferencing, anti-steering, data combination consent, advertising price transparency, independent measurement access, data portability and messaging interoperability. Penalties reach 10% of worldwide turnover, 20% for repeat breaches.

When: Proposed December 2020, adopted September 2022, in force since 1 November 2022 and applicable since 2 May 2023. Obligations became binding on 7 March 2024. Enforcement produced €700 million in fines during 2025 and €890 million against Google in July 2026.

Where: The European Union and European Economic Area. Obligations attach to services offered to EU-located users, regardless of where the gatekeeper is headquartered.

Why: Conventional antitrust enforcement proved too slow against platforms whose market positions entrenched faster than cases could conclude. The regulation shifts the burden, imposing conduct rules on designation rather than after a finding of abuse.