The UK's Digital Markets, Competition and Consumers Act: A Guide to the New Rules for Big Tech, Subscriptions, and Global Fines

Passed in May 2024, the UK's Digital Markets, Competition and Consumers Act (DMCCA) represents the most profound transformation of British consumer and competition law in decades. Designed to modernize protections for the digital economy, the legislation systematically rewrites the rules of engagement between businesses and consumers.

The core mechanism of the Act is a radical expansion of the Competition and Markets Authority's (CMA) enforcement capabilities. Previously, the regulator had to navigate lengthy court proceedings to penalize companies for consumer law breaches. Under the DMCCA, the CMA has been granted direct administrative powers to investigate, issue compliance directions, and levy massive financial penalties entirely outside the courtroom.

The financial stakes for non-compliance are now existential for major corporations. The CMA can impose fines of up to 10% of a company's global annual turnover for severe breaches of consumer law, mirroring its existing powers in competition law. For individuals, such as company directors who provide false information or obstruct investigations, personal fines can reach £300,000, alongside the potential for criminal prosecution.

A central pillar of the legislation is the creation of a bespoke regulatory regime for the world's largest technology companies. The Act formally empowers the Digital Markets Unit (DMU) within the CMA to designate specific firms as having "Strategic Market Status" (SMS). This designation is reserved for companies with substantial and entrenched market power, a position of strategic significance, and a global turnover exceeding £25 billion or UK turnover above £1 billion.

Once a technology giant receives an SMS designation, it becomes subject to tailored conduct requirements designed to prevent anti-competitive behavior. The DMU can mandate interoperability, restrict self-preferencing where a platform favors its own services over rivals, and require mandatory reporting for mergers and acquisitions to prevent "killer acquisitions" of nascent competitors.

Beyond Big Tech, the DMCCA introduces sweeping protections that affect almost every business operating online, starting with a strict crackdown on fake reviews. As of April 2025, it is explicitly illegal to commission, submit, or publish fake consumer reviews. The law defines a fake review as any feedback that purports to be, but is not, based on a genuine customer experience.[1]

The legislation also targets "concealed incentivised reviews." Businesses can still offer incentives for feedback, but they must clearly and prominently disclose when a reviewer was compensated with money, discounts, or free products. Furthermore, platforms that host reviews are now legally obligated to take "reasonable and proportionate steps" to detect and remove fraudulent ratings, shifting the burden of policing from the consumer to the publisher.[1]

Another major target of the Act is "drip pricing," a tactic where a consumer is shown an initial headline price, only to face mandatory hidden fees added late in the checkout process. The new rules mandate that all unavoidable fees, taxes, and charges must be included in the upfront price display. Optional add-ons, such as priority boarding or premium seating, are exempt, but core processing or booking fees can no longer be obscured.

The CMA has not hesitated to use its new powers. In November 2025, the regulator launched its first formal consumer protection investigations under the DMCCA, targeting eight major businesses across the ticketing, driving school, and fitness sectors for suspected drip pricing and automatic opt-ins. This was followed in March 2026 by a wave of parallel investigations into household names over the handling of false and misleading online reviews.

While the competition and unfair trading provisions are now actively enforced, the Act's highly anticipated overhaul of subscription contracts has faced significant delays. Originally slated for 2026, the government confirmed in April 2026 that the new subscription regime is now expected to commence in Spring 2027, giving businesses more time to adapt their billing infrastructure.

Once implemented, the subscription rules will require businesses to provide crystal-clear pre-contract information and send mandatory reminder notices before a contract auto-renews or a free trial converts to a paid tier. Crucially, the law mandates a straightforward cancellation process, ensuring that exiting a subscription is as effortless as signing up.

The subscription framework also introduces refined "cooling-off" periods. Consumers will retain their initial 14-day cancellation window, but the new rules will also grant a secondary cooling-off period following the end of a free trial or the auto-renewal of a long-term contract, allowing users to claim a proportionate refund if they cancel promptly.

To complement these enforcement mechanisms, the UK government rolled out new Alternative Dispute Resolution (ADR) regulations in April 2026. These statutory instruments replace the voluntary ADR framework with a mandatory accreditation system for dispute resolution providers, ensuring consumers have access to reliable, independent mediation without resorting to costly court battles.[2]

The overarching impact of the DMCCA is a fundamental shift from reactive consumer protection to proactive compliance. With the CMA actively issuing information notices, launching investigations, and wielding the threat of global turnover fines, businesses operating in the UK are being forced to audit their entire digital supply chains—from checkout flows to review moderation—to ensure they meet the new standard of transparency.