Journey

Responding to a CMA investigation

What to do if the Competition and Markets Authority or Trading Standards is investigating your business. Covers immediate steps, cooperation obligations, deadlines, undertakings, and possible outcomes including fines under the Digital Markets, Competition and Consumers Act 2024.

Running a Business Updated 15 September 2026
5 milestones references 4 guides

You have received contact from the CMA or Trading Standards

Consumer protection enforcement is carried out by the Competition and Markets Authority (CMA) and local Trading Standards services. From 6 April 2025, the Digital Markets, Competition and Consumers Act 2024 (DMCC Act) gives the CMA direct fining powers — it no longer needs to go to court to impose penalties.

  1. What can the CMA investigate?

    The CMA investigates consumer protection breaches. Common triggers include:

    • Unfair terms in consumer contracts — grey-listed terms under the Consumer Rights Act 2015
    • Misleading practices — false or misleading information about products, prices, or services
    • Subscription and auto-renewal practices — inadequate cancellation rights under the DMCC Act
    • Anti-competitive behaviour — price-fixing, market sharing, abuse of dominant position
    • Failure to honour statutory rights — refunds, repairs, replacements under the Consumer Rights Act 2015

    Consumer rights compliance for traders

    Your obligations under the Consumer Rights Act 2015: goods, services, and digital content rights, tiered remedies, and key timeframes.

    Avoiding unfair terms in consumer contracts

    How to identify and remove unfair terms from your standard contracts and terms of service.

  2. Assess your position

    Once you have legal advice, work through the following with your solicitors:

    • What conduct is alleged and which legislation is cited?
    • What evidence do you hold? (Contracts, complaints records, pricing data, training records)
    • What is the period under investigation? (Fines reflect duration of breach)
    • What is your worldwide annual turnover? (CMA can fine up to 10% of global annual turnover)

    Prepare for CMA enforcement action

    The CMA investigation process in full: information gathering, provisional decisions, oral hearings, undertakings, enhanced consumer measures, and appeals.

  3. Respond to the investigation

    The CMA has a formal investigation process. Your obligations during this process are legally binding.

    • Respond to information requests in full and on time — failure attracts daily penalties of up to 5% of worldwide daily turnover
    • Implement a legal hold — instruct all relevant staff not to delete or alter documents
    • Request an extension before any deadline if you need more time — do not simply miss a deadline
    • Do not contact other businesses under investigation — this could constitute separate competition law breaches
  4. Consider whether to offer undertakings

    At any point during an investigation, your business can offer undertakings — binding commitments to change practices. Undertakings can avoid formal proceedings, reduce penalties, and give you greater control over the outcome. Discuss this with your legal advisers early.

    • Undertakings are legally binding — breach attracts a penalty of up to £150,000 or 5% of global turnover (fixed), or 5% of daily turnover if calculated daily
    • The CMA can require redress measures (compensation to affected consumers) as part of undertakings or a final decision
    • Cooperation and voluntary remediation are formal mitigating factors in penalty calculations

    Handle consumer complaints about faulty goods

    How to manage complaints and apply the correct statutory remedies — relevant if the investigation concerns your returns or refund practices.

    gov.uk

    GOV.UK CMA consumer enforcement (opens in a new tab)

    CMA enforcement priorities, open cases, and how to engage with an investigation.

    legislation.gov.uk

    Digital Markets, Competition and Consumers Act 2024 (opens in a new tab)

    The legislation underpinning the CMA's direct fining powers from April 2025.

    legislation.gov.uk

    Enterprise Act 2002 (opens in a new tab)

    The primary competition and consumer enforcement legislation alongside the DMCC Act.

  5. Understand possible outcomes

    A CMA investigation can result in:

    • No action — the CMA does not find a breach
    • Undertakings — binding commitments to change practices, negotiated without formal proceedings
    • Directions — formal order to stop the infringing conduct
    • Financial penalty — up to 10% of global annual turnover for a breach; up to 5% of daily turnover for procedural non-compliance
    • Enhanced consumer measures — redress to affected consumers, compliance programmes, or choice measures
    • Court action — the CMA can also pursue injunctions and seek consumer redress through the courts

    CMA decisions can be appealed to the Competition Appeal Tribunal (CAT). A CMA finding can also be used by affected consumers as the basis for individual civil claims.

    gov.uk

    Find your local Trading Standards office (opens in a new tab)

    If Trading Standards is involved, contact them directly for local enforcement queries.