Managing Underperformance Without Triggering Legal Risk
Underperformance is something most employers will face at some point. Whether it’s a drop in productivity, missed targets, or concerns around behaviour, how you respond matters.
Handled well, performance issues can often be resolved with the right support and structure. Handled poorly, they can lead to grievances, low morale, or even employment tribunal claims.
This guide outlines how to manage underperformance in a way that is fair, consistent, and legally compliant.
What counts as underperformance?
Underperformance is not always obvious, and it can take different forms depending on the role.
It may include:
- Consistently failing to meet agreed targets or deadlines
- Producing work below the expected standard
- Lack of engagement or reduced productivity
- Difficulty carrying out key responsibilities
The key is to assess performance against clearly defined expectations, rather than assumptions.
Common causes of underperformance
Before taking action, it is important to understand why the issue is happening.
Some of the most common causes include:
- Unclear expectations, where employees are unsure what is required of them
- Lack of training or support to carry out the role effectively
- Personal or wellbeing issues affecting performance
- Workplace conflict or management challenges
Identifying the root cause allows you to respond appropriately, rather than treating all cases the same.
Why handling performance issues carefully matters
Managing underperformance is not just about improving output, it also carries legal and cultural implications.
Employment law risks
If performance issues are not handled fairly, employers may face claims such as unfair dismissal, particularly if a formal process is not followed.
Workplace morale
How you manage one employee can affect the wider team. A heavy-handed or inconsistent approach can damage trust and engagement.
Taking a structured, fair approach helps protect both your business and your people.
Steps to managing underperformance properly
Identify the issue early
The earlier you address performance concerns, the easier they are to resolve.
Avoid letting issues build up. Instead, raise concerns promptly and constructively.
Hold supportive performance conversations
Start with an open, informal discussion.
Focus on:
- What you have observed
- How it is affecting the business or team
- Inviting the employee to share their perspective
This should feel like a two-way conversation, not a disciplinary meeting.
Set clear expectations and objectives
Clarity is essential. Agree on what improvement looks like, specific, measurable objectives and a realistic timeframe for progress. This gives the employee a clear path forward.
Provide training and support
If underperformance is linked to capability, additional support may be needed. This could include further training, regular check-ins and adjustments to workload or responsibilities. Supporting improvement is a key part of a fair process.
Document everything
Keeping accurate records is essential. Document initial concerns, conversations and agreed actions, as well as progress reviews. This provides clarity and protects your position if the issue escalates.
When to move to a formal capability process
If performance does not improve despite support and clear expectations, it may be necessary to move to a formal process.
A formal capability procedure should:
- Follow a structured and transparent process
- Give the employee the opportunity to respond
- Include clear warnings and next steps
- Be applied consistently and fairly
Following a recognised framework, such as ACAS guidance, helps ensure your approach is legally sound.
The role of fair procedures and documentation
Fairness and consistency are critical throughout the process.
Employers should ensure that:
- Decisions are based on evidence, not assumptions
- Employees are given the opportunity to improve
- Procedures are followed correctly at each stage
Good documentation supports this and provides a clear audit trail if decisions are challenged.
How The HR Dept can support your business
Managing underperformance can be complex, particularly when balancing business needs with legal obligations.
The HR Dept works with SME employers to provide clear, practical guidance on performance management. From handling initial concerns to supporting formal capability procedures, we help ensure your approach is fair, consistent, and compliant.
We also support with documentation, policy development, and ongoing HR advice, giving you confidence when dealing with sensitive employee relations issues.
Underperformance does not need to lead to conflict or legal risk, but it does require a structured and thoughtful approach.
If you are dealing with a performance concern or want to ensure your processes are robust, seeking professional advice early can help you avoid more serious issues later.
Speak with The HR Dept for expert support in managing performance fairly and effectively.
