Managing Underperformance Properly: The Questions UK Employers Should Ask Before Starting a Capability Process
There is a pattern that plays out in UK businesses of all sizes, and it tends to end in the same place: a formal HR process that nobody wanted, a relationship that has broken down past the point of repair, and a business owner wondering how things got this far.
The pattern usually starts not with a dramatic incident but with a quiet tolerance of something that should have been addressed much earlier. A manager whose team is not performing. A member of staff whose output has been slipping for months. A role that has quietly outgrown the person in it. And instead of a straightforward conversation, there is hesitation. Then more hesitation. Then one day, the problem has grown large enough that it feels like it needs a formal response, and so someone picks up the phone to HR.
What follows is often a capability process that could have been avoided entirely, or at least handled more simply, if the right questions had been asked several months earlier.
This article is for employers who want to understand what those questions are.
Why Underperformance Gets Left Too Long
The gap between noticing a performance problem and doing something about it is rarely a gap in knowledge. Most managers and business owners know, at some level, that they should address poor performance early. The hesitation is usually about something else: discomfort with the conversation, uncertainty about whether the problem is serious enough to warrant action, concern about how the employee will react, or a quiet hope that things will improve on their own.
None of those reasons make the delay less costly. By the time a performance issue has been running for six months or a year without meaningful intervention, the employee may reasonably feel blindsided by any formal action. A tribunal, if things reach that point, will look at whether the employer raised concerns consistently and gave the individual a genuine opportunity to improve. Evidence that the problem was known but ignored for an extended period rarely helps the employer's position.
The first question worth asking, then, is not about process. It is about timing.
When did you first notice this was a problem, and what happened next?
If the honest answer is "several months ago, and nothing happened," that does not mean a formal process is now unavoidable. But it does mean the employer needs to be careful about how they approach the next steps, and realistic about what a capability process can and cannot achieve at this stage.
The Informal Stage That Most Employers Skip
The second failure that tends to compound the first is jumping from silence directly to formal HR involvement. The informal management stage, where a line manager has a direct, honest conversation with the individual about the specific performance concerns, sits between the two. It is not a soft option or a procedural nicety. It is usually the most effective intervention available, and it is the one most commonly missed.
An informal conversation about performance serves several purposes. It gives the individual the chance to understand what is expected of them, which they may not have had clearly articulated before. It surfaces factors the employer may not be aware of, such as a change in personal circumstances, a health issue, or a concern about their role that has not been raised through any other channel. And it creates a record, however informal, that the matter was raised and taken seriously before any formal process began.
Before reaching for a formal capability procedure, it is worth asking honestly whether this step has actually happened.
Has the employee been told, clearly and specifically, what the performance concern is?
Not in passing, not through inference, not because "they should know." Has someone sat down with them, named the issue, explained what good performance in that area looks like, and given them the chance to respond?
If the answer is no, a formal process is almost certainly premature. Starting a capability procedure without that foundation creates legal risk and, more practically, makes it much harder to demonstrate to any objective observer that the employer acted fairly and in good faith.
Capability or Conduct? The Distinction That Changes Everything
One of the more consequential errors in managing underperformance is treating a performance issue as a capability issue when it is actually a conduct issue, or vice versa. They are governed by different procedures, carry different implications, and call for different management responses.
A capability issue is one where the employee is unable to perform to the required standard, despite genuinely trying. The cause might be skill, knowledge, aptitude, or health. A conduct issue is one where the employee is not performing because of a choice they are making, whether that is a failure to follow instructions, a pattern of cutting corners, or a refusal to meet expectations they are capable of meeting.
The distinction matters because the procedural responses are different. Capability processes are about support, development, and a reasonable opportunity to improve. Conduct processes focus on whether the employee's behaviour is acceptable and whether it warrants disciplinary action. Conflating the two can lead to a process that is procedurally flawed before it has properly begun.
Is this a case where the employee cannot meet the standard, or one where they are not meeting it despite being capable of doing so?
The answer may not be immediately obvious. In practice, the line between a capability and a conduct issue sometimes blurs. An employee whose performance has declined significantly may be dealing with a health issue they have not disclosed. Someone who appears to be choosing not to engage may be struggling with something that affects their capacity to do so. The question is worth sitting with before a process is designed.
What Support Has Been Provided?
A capability process, to be defensible, generally needs to demonstrate that the employer did not simply identify a performance gap and move to formal action. Tribunals and ACAS guidance both reflect the expectation that employers take reasonable steps to support improvement before or alongside any formal procedure.
What support, training, or development has the employee received in relation to the areas where performance is falling short?
This is a question worth asking before any formal process begins, because the answer will shape what the process looks like and how credible it will appear if challenged. If the role has changed significantly and the employee has not been given the tools or training to meet the new requirements, a capability process that simply measures them against those requirements without addressing the gap is unlikely to be seen as fair.
This is also the point at which a coaching or development conversation for the individual's manager may be relevant. If underperformance is partly a function of how the team is being managed, or if the manager handling the capability process lacks the confidence or skill to manage it well, that is worth addressing. A poorly managed capability process can create as many problems as the underperformance it is meant to resolve. For businesses where leadership and management capability is itself part of the picture, structured support for the manager involved can be as important as the process applied to the underperforming individual.
The Role Design Question
This one is less commonly asked, and it matters more than it might appear.
Is the role still what it was when the employee was hired, and if it has changed, has that change been communicated clearly?
Businesses grow. Roles evolve. What was a reasonable expectation of a member of staff two or three years ago may look quite different from what the business needs from that role today. If an employee is underperforming relative to a set of expectations that have shifted without clear communication, the performance issue may partly be a role clarity issue.
This does not mean a business cannot hold its people to current standards. It means the starting point for the conversation needs to reflect what has actually been communicated, agreed, and made explicit, not what the employer assumed was understood.
Before the Formal Process Begins: The Core Questions
Pulling this together, the questions worth working through before formally initiating a capability process are as follows.
When was the issue first noticed, and what happened in the period between then and now? If the gap is significant, the employer needs to understand how that will look to an objective observer and what, if anything, happened during that time that evidences genuine management of the issue.
Has the employee received a clear, specific explanation of what the performance concern is and what improvement looks like? If not, that conversation needs to happen before anything formal begins.
Is this genuinely a capability issue, or could it be a conduct issue, a health issue, or a management issue? The honest answer to that question determines the right process.
What support has been offered, and is there a realistic case that the employee has been given a fair opportunity to meet the standard? If the support has been thin or absent, that needs to be addressed alongside or before any formal procedure.
Has the role itself changed in ways that may have contributed to the performance gap, and have those changes been clearly communicated?
These are not bureaucratic checkboxes. They are the questions that determine whether a formal process is the right tool, and whether, if it becomes contested, the employer can demonstrate that they acted fairly and in good faith.
When HR Should Be Involved
None of the above is an argument against involving HR or an external adviser. It is an argument for involving them at the right point, with the right information, having already done the foundational work that makes their involvement effective.
HR support becomes most valuable when the informal stage has been attempted and has not produced the required improvement, when the situation has a complexity that requires careful procedural handling, or when the relationship between manager and employee has broken down to the point where an impartial process is needed. Reaching for HR support before any of the preceding questions have been honestly answered tends to accelerate a formal process that may not have been necessary at all.
The same applies to the long-term sickness dimension of capability. Where an employee's underperformance is connected to a health condition or a period of absence, the questions to ask before initiating any formal process are different again. Managing long-term sickness and capability dismissal explores that territory in more detail.
Getting This Right
Capability processes are not inherently problematic. When they are used appropriately, with proper foundations, clear communication, and genuine support for improvement, they can resolve difficult situations fairly for both sides. The problems arise when they are reached for too quickly, without the groundwork that makes them legitimate, or too late, after months of tolerance that have made the situation harder for everyone.
The businesses that handle underperformance well tend to be the ones where managers are confident enough to have honest conversations early, where there is clarity about what good performance looks like, and where the line between informal management and formal process is understood and respected.
If the situation you are facing does not look like that yet, the place to start is with the questions above, not the formal procedure.
If you are dealing with a capability issue that has become more complicated than expected, or where you are uncertain whether the right groundwork has been laid, ProgressA's HR advisory support is available to help you work through it before committing to a formal process.
