CQC Regulation 16: Receiving and Acting on Complaints

Every care provider registered with the Care Quality Commission will receive complaints at some point — from a resident unhappy about mealtimes, a family member concerned about a missed medication round, or a relative who feels a concern was brushed aside during a visit. What separates a compliant provider from one facing enforcement action is not whether complaints happen, but how the service receives, investigates and learns from them. That is precisely what Regulation 16 of the Health and Social Care Act 2008 (Regulated Activities) Regulations 2014 is designed to test.

Regulation 16 sits alongside the statutory duty of candour under Regulation 20 as one of the fundamental standards CQC uses to judge whether a service is genuinely open, honest and responsive when things go wrong. Get complaints handling wrong and you rarely fail in isolation — poor complaints systems are almost always accompanied by weak governance, incomplete incident records and a defensive culture, all of which inspectors are trained to spot.

What Regulation 16 actually requires

In plain terms, Regulation 16 requires every registered provider to establish and operate an accessible and effective system for identifying, receiving, recording, handling and responding to complaints from people using the service, their representatives, or anyone else affected by the way the service is run. It is not enough to have a complaints policy sitting in a folder — the system has to work in practice, for the people who actually need to use it.

The regulation also requires providers to investigate complaints thoroughly, take action where failures are identified, and keep clear records of every complaint, its outcome, and any resulting changes. Crucially, CQC can request evidence of complaints handling at any time and, under the regulations, providers must supply a summary of complaints, responses and relevant correspondence within 28 days of a request. Failure to do so can lead to direct enforcement, including prosecution, without a prior warning notice.

What an accessible, proportionate complaints system looks like

CQC does not expect every service to run an identical process, but it does expect the system to be proportionate to the people who use it. In practice, that means:

• Information about how to complain is available in accessible formats — easy read, large print, translated versions, or verbal explanations for people who cannot read written information.
• Staff at every level, not just managers, know how to receive and log a complaint, including one made verbally or informally in passing.
• People with communication needs, cognitive impairment or limited mobility can access advocacy or interpreter support to raise a concern.
• Complaints can be made by residents, family members, visiting professionals or anyone else with a legitimate interest in the person's care.
• The process is genuinely independent of the person being complained about, so a concern about a specific staff member is not simply investigated by that same person.

Timescales and investigation standards

Regulation 16 does not prescribe a single rigid timescale in the way some organisational complaints policies do, but CQC expects providers to acknowledge complaints promptly and to keep complainants updated throughout. In practice, most well-run services aim to acknowledge a complaint within one to three working days and to provide a full response within 20 to 28 working days, escalating and communicating clearly if an investigation needs longer.

What matters more to inspectors than the exact number of days is the quality of the investigation itself. This means establishing the facts, identifying the root cause rather than just the immediate trigger, and being able to show your working. This is where complaints handling overlaps heavily with wider incident investigation and documentation standards — a complaint that reveals a safeguarding concern, a medication error or a significant injury should trigger the same rigorous investigation trail as any other reportable incident, with dates, actions taken, and evidence clearly recorded.

Learning from complaints, not just closing them

One of the most common gaps CQC identifies is a complaints log that is technically complete but analytically dead — every complaint is recorded and responded to, but nobody has ever stepped back to ask what the complaints, taken together, are actually telling the service. Regulation 16 expects providers to look for patterns: recurring themes by unit, shift, staff member or time of day, and to use that analysis to drive genuine change in practice, training or staffing.

This is also where complaints handling connects to the wider governance arrangements a service has in place. A complaint that surfaces at a resident's care review, gets raised at a relatives' meeting, or is mentioned to a visiting healthcare professional should feed into the same central log and governance oversight as a complaint submitted through the formal procedure. If your complaints data lives in three different places and never reaches the registered manager or provider level, that is a governance failure as much as a complaints-handling one.

Protecting complainants from victimisation

CQC guidance is explicit that people must never be discriminated against or victimised for raising a complaint, and that a person's care or treatment must not be affected, whether consciously or through a change in staff attitude, because they or their family have complained. This matters enormously in care settings, where residents and families are often understandably anxious that speaking up could affect the quality of care they receive. A genuinely open culture, reinforced by leadership, is what gives people the confidence to raise concerns early — before they escalate into formal complaints, safeguarding referrals, or reputational damage.

What CQC inspectors look for as evidence

When assessing Regulation 16 during an inspection, inspectors typically want to see:

• A centralised, up-to-date complaints log covering all complaints received, including informal or verbal ones.
• Evidence of root-cause analysis for more serious complaints, not just a description of what happened.
• Action trackers showing what changed as a result of a complaint, who was responsible, and by when.
• Evidence that learning was shared with staff — through supervision, team meetings, or updated policies and training.
• Sampled complaint files that show timely acknowledgement, a proportionate investigation, and a clear, empathetic response to the complainant.
• Evidence that trends in complaints are reported to, and discussed by, senior management or the provider's governance meetings.

Inspectors will also cross-reference your complaints log against safeguarding referrals, statutory notifications and incident records. A mismatch — for example, a serious complaint that was never notified where it should have been — is a significant red flag and one of the more common reasons services fall short at inspection.

Common shortfalls

The most frequent problems providers run into under Regulation 16 include: response delays with no explanation to the complainant; generic, template-style responses that do not actually address the specific concern raised; investigations that identify what happened but never establish why; agreed actions that are never followed through or checked; and complaints registers that exist on paper but are never reviewed for trends. Any one of these, on its own, might seem minor, but taken together they point to exactly the kind of weak oversight that CQC associates with wider inspection failure.

Building a complaints system that withstands inspection

Getting Regulation 16 right is ultimately about treating complaints as a source of assurance rather than a threat. A strong complaints system should be simple enough for any staff member to explain, visible enough that residents and families know it exists, and rigorous enough that senior leaders can honestly say they know what people are unhappy about and what has been done in response. Investing time in staff training on complaints handling, root-cause investigation and open, candid communication pays for itself many times over, both in inspection outcomes and in the trust of the people you support.

If your team needs a structured way to build this knowledge, Learnsignal's CPD training courses cover complaints handling, duty of candour and the wider fundamental standards in depth, giving registered managers and compliance leads a practical route to demonstrable, evidenced competence ahead of the next inspection.