Performance Management And Employee Termination (2026 Updated)

Performance issues are one of those "slow burn" problems in a business.

At first, it might look like missed deadlines, patchy customer service, or work that needs re-doing. But left unchecked, poor performance can quickly turn into wider team frustration, lost revenue, and (in the worst cases) a legal dispute when you try to bring the employment to an end.

The good news is: with the right process and paperwork, you can manage performance fairly, improve outcomes, and (where needed) end employment lawfully and confidently.

In this 2026-updated guide, we'll walk you through how performance management typically works in the UK, what a fair termination process looks like, and how to reduce the risk of an unfair dismissal claim.

Why Performance Management Matters (And Why "Just Let Them Go" Is Risky)

When you're running a small business, you don't have time for drawn-out HR processes. It's tempting to think: "They're not doing the job, so we'll end it."

But in the UK, employee termination isn't only about whether someone is underperforming. It's also about whether you acted reasonably and followed a fair process.

The Legal Framework In Plain English

Most disputes about performance-related dismissals come back to a few key legal principles:

• Unfair dismissal risk: Employees with 2+ years? continuous service generally have the right not to be unfairly dismissed (Employment Rights Act 1996). Even where performance is genuinely poor, a dismissal can still be unfair if the process wasn't fair.
• Discrimination risk: Performance concerns can overlap with protected characteristics under the Equality Act 2010 (for example, disability, pregnancy/maternity, age, religion). If performance issues are linked to a protected characteristic and you don't handle it properly (including reasonable adjustments where relevant), claims can escalate quickly.
• Wrongful dismissal risk: If you dismiss without giving the correct notice (or PILON where allowed), you may face a contractual claim.
• ACAS Code: While the ACAS Code of Practice is best known for disciplinary issues, tribunals often expect employers to behave in a similarly fair, reasonable way in capability/performance scenarios too (clear allegations/concerns, meeting, chance to respond, opportunity to improve, and a right of appeal).

Performance Management Is Also A Business Tool

It's not all about avoiding claims.

A clear performance process helps you:

• set expectations so people know what "good" looks like
• spot training or resourcing issues early
• create consistency across managers (which reduces "favouritism" complaints)
• protect team culture by addressing issues fairly and promptly
• build evidence if termination becomes necessary

And yes, it can feel formal. But formal doesn't have to mean unfriendly - it just means clear and documented.

How To Run A Fair Performance Process (Step-By-Step)

There isn't a single legally mandated performance management script, but there are consistent steps that, in practice, help you act reasonably and reduce risk.

Here's a structure many UK employers use.

1. Start With Clear Standards (Before Things Go Wrong)

Performance problems are much harder to manage when the "rules" were never written down.

Before you even get into performance management, make sure you have:

• a properly drafted Employment Contract that sets out duties, working arrangements, and key policies (or refers to your handbook)
• a clear job description (even a practical one-page document is better than nothing)
• basic policies/processes: performance review approach, probation process, disciplinary rules, absence reporting, etc.

This matters because "poor performance" is always measured against something. The clearer your expectations, the fairer your process will be.

2. Raise Concerns Early (Informally First, If Appropriate)

Not every performance issue needs a formal warning straight away.

Often, a first step is an informal conversation like:

• what's not meeting the required standard
• what standard is required
• what support will be provided (training, supervision, tools)
• when you'll review progress

Even at the "informal" stage, make a short note for your records. If the issue later escalates, it helps show you acted reasonably and gave the employee a fair chance to improve.

3. Use A Structured Improvement Plan (With Realistic Targets)

If the issue continues, you'll usually move to a formal performance process. A common approach is a structured Performance Improvement Plan.

A good plan isn't just "do better." It should include:

• specific issues (with examples)
• measurable targets (quality, speed, accuracy, client satisfaction, etc.)
• support offered (training, shadowing, coaching, adjusted workload)
• timeframes (e.g. 4?8 weeks depending on role)
• review points (weekly/fortnightly catch-ups)
• consequences if targets aren't met (including formal warnings and potential dismissal)

Be careful with unrealistic targets. If the goals are impossible, the process can look like you're setting the employee up to fail - which is exactly the kind of fact pattern that leads to disputes.

4. Hold Fair Meetings (And Let Them Respond)

Performance management shouldn't be a one-way announcement.

At each formal stage, you should typically:

• invite the employee to a meeting, explaining the concerns
• share examples/evidence in advance where possible
• give them a genuine opportunity to respond (and explain any barriers)
• consider whether health issues, disability, workload, training gaps, or workplace conflict are factors
• confirm outcomes in writing

This is also a good time to sense-check whether you're really dealing with performance, or whether the underlying issue is actually conduct (misconduct) or absence/health (capability).

5. Apply Warnings Consistently And Keep Records

Where improvement isn't happening, a common structure is:

• first written warning
• final written warning
• dismissal (with notice or PILON)

Many employers ask how to handle a Final Written Warning properly. The key is clarity: what must improve, by when, and what happens if it doesn't.

Also think about duration: some warnings "live" for a set period (e.g. 6?12 months). Whatever you choose, be consistent and communicate it in writing - and remember tribunals look at overall reasonableness as well as your internal policy. If you want to pressure-test how long warnings should remain active, this guide on written warning duration is a useful reference point.

When Poor Performance Becomes Capability (And What A Lawful Dismissal Looks Like)

In UK employment law, dismissals for poor performance usually fall under "capability" (not misconduct).

Capability is about an employee's ability to do the role to the required standard - whether due to skill, aptitude, health, or another capability-related factor.

What Makes A Capability Dismissal "Fair?"

A fair capability dismissal usually involves showing that:

• you identified the performance problem clearly and with evidence
• you investigated the causes (including whether training/support/adjustments were needed)
• you warned the employee the job was at risk if improvements weren't made
• you gave a reasonable chance to improve
• you considered alternatives (redeployment, changes to duties, extended review period)
• you followed a fair procedure including a right of appeal

Many employers find it helpful to align their internal steps with recognised best practice for capability procedures, particularly when the employee has 2+ years of service (where unfair dismissal risk is higher).

What If There's A Health Or Disability Angle?

This is where things often get tricky.

If the employee's performance may be impacted by a health condition, you should consider:

• whether you need medical input (for example, an occupational health report)
• whether the condition could amount to a disability under the Equality Act 2010
• whether reasonable adjustments are needed (adjusted hours, duties, equipment, targets, training, additional supervision)

Even if you ultimately end employment, being able to show you considered adjustments and acted fairly can make all the difference.

Can You Dismiss For Poor Performance Without Warnings?

Sometimes you can - but it's rarely the low-risk option.

For example, if someone is still within probation and you've clearly communicated that they're not meeting the role requirements, termination can be more straightforward (though discrimination and contractual notice risks still exist).

But outside of probation, dismissing without a fair process is often where employers get into trouble. If you're weighing this up, this guide on dismissal without warning explains the common legal pitfalls to watch for.

Poor Performance Vs Misconduct: Don't Use The Wrong Process

A common (and very understandable) mistake is trying to "discipline" someone for performance, when what you really have is capability issues - or vice versa.

Getting this wrong can create legal risk, because the process and expectations are different.

Performance/Capability Issues (Usually Not "Blameworthy")

These are issues like:

• not hitting sales targets despite effort
• consistent errors due to lack of skill or training
• slow work output where expectations weren't met
• poor organisation/time management that doesn't improve with coaching

These usually call for support, coaching, improvement plans, and capability meetings.

Misconduct Issues (Behaviour Choices)

Misconduct is more about behaviour, such as:

• refusing lawful instructions
• unexplained absences
• breaches of policy
• bullying or harassment
• dishonesty

Serious misconduct can justify a faster process, but you still need procedural fairness (and evidence).

If you're dealing with a serious incident, it's worth using a structured checklist so you don't miss key steps - this gross misconduct checklist is a good starting point for what employers typically need to consider.

Should You Suspend During An Investigation?

Suspension can be appropriate in some cases (for example, where there's alleged misconduct and you need to protect evidence, customers, or staff). But it can also backfire if it's used as a knee-jerk reaction or feels punitive.

If suspension is on the table, take a careful approach (confirm it's on full pay, keep it as short as possible, review regularly, and document why you're doing it). This guide on employee suspension covers the key risks and best-practice points.

Documents And Paper Trails That Protect Your Business

Most performance management disputes aren't really about what happened - they're about what you can prove happened.

That's why documentation matters.

What Records Should You Keep?

In a typical performance process, aim to keep:

• job description and role expectations
• notes of informal chats (date, topic, agreed actions)
• copies of performance plans and review notes
• meeting invites and outcome letters
• warnings (with clear improvement requirements and review periods)
• training provided (what, when, who delivered it)
• any reasonable adjustments considered/implemented
• appeal notes and outcomes

One practical tip: after each key meeting, send a short follow-up email confirming what was discussed and the next steps. It's a simple habit that can save you a lot of stress later.

Make Sure Your Contracts And Policies Match How You Operate

If your employment contract says you'll follow a particular process (for example, a staged warning system), but managers don't actually follow it, that inconsistency can become a problem in a dispute.

It's worth checking that your:

• contracts and policies reflect your real-world approach
• managers understand the basics (and know when to escalate)
• probation periods are used properly (with clear reviews and outcomes)

And if you're updating documents in 2026 (especially with remote/hybrid work and evolving employee expectations), it's a good time to make sure your wording is still fit for purpose.

Ending Employment: Notice, PILON, And The "Reason" For Dismissal

If termination becomes the outcome, your dismissal letter should usually confirm:

• the reason for dismissal (capability/performance, misconduct, redundancy, etc.)
• the effective termination date
• notice arrangements (working notice or payment in lieu if your contract allows)
• final pay (including unused holiday)
• return of company property and confidentiality reminders
• the right of appeal (where applicable)

It's also important to understand the difference between claims that focus on process versus claims that focus on notice and contract. If you want a simple breakdown, this guide on wrongful vs unfair dismissal explains how they differ (and why employers often mix them up).

Key Takeaways

• Performance management is about more than results - if you end employment, you'll usually need to show you acted reasonably and followed a fair process.
• Start with clear expectations in writing (contract, role scope, policies), so performance can be assessed fairly and consistently.
• Use informal conversations early, then move to structured improvement steps like a Performance Improvement Plan when needed.
• Capability/performance dismissals are typically safer when you've documented concerns, provided support, given reasonable time to improve, and offered a right of appeal.
• Be alert to discrimination risks, especially where performance may be linked to health or disability - reasonable adjustments and careful decision-making are crucial.
• Don't force performance issues into a misconduct process (or vice versa); using the wrong procedure can create unnecessary legal exposure.
• Solid records (meeting notes, targets, support offered, warnings, outcomes) are often what make the difference if a dismissal is challenged.

If you'd like help with performance management, restructuring your HR process, or ending employment on the right terms, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.