Why Most Performance Reviews Fail in Employment Court (and How to Fix Your Performance Management Process)
Ron Mckenzie | March 9, 2025
Performance management is intended to help employees improve and organisations maintain strong workplace standards. Yet in New Zealand employment disputes, many performance management processes collapse when scrutinised by the Employment Relations Authority or Employment Court.
The issue is rarely the existence of performance concerns themselves. Instead, the problem lies in how the process is carried out. Employers often believe a performance review is sufficient documentation to justify disciplinary action or dismissal, only to discover that the process does not meet the legal standard required under performance management law in NZ.
For businesses, this can lead to costly disputes, reputational damage, and findings of unjustified dismissal or disadvantage.
In this guide, we explain why performance reviews frequently fail in Employment Court, what the law actually requires, and how employers can implement a performance management process that stands up to legal scrutiny. If you’re navigating complex performance issues, seeking employment lawyer advice early can make a significant difference.
Understanding Performance Management Under NZ Employment Law
In New Zealand, performance management is not simply an internal HR process. It is governed by the good faith obligations under the Employment Relations Act 2000.
At its core, employers must act as a fair and reasonable employer could in the circumstances.
This principle shapes how performance management must be conducted. A lawful process typically requires employers to:
- Clearly communicate performance concerns
- Provide employees a genuine opportunity to improve
- Offer appropriate support and guidance
- Allow employees to respond to feedback
- Follow a fair and transparent process before any disciplinary outcome
What often surprises employers is that documentation alone is not enough. A written performance review does not automatically make a process fair if the underlying steps were flawed.
The Employment Court looks closely at whether the employee was treated fairly throughout the process, not just whether a form was completed.
Why Most Performance Reviews Fail in Employment Court
There are several recurring reasons performance management cases fail when challenged legally.
Lack of Clear Performance Expectations
One of the most common issues is that employees were never clearly informed what success looked like.
If job expectations are vague, outdated, or inconsistently communicated, it becomes difficult to prove that an employee failed to meet them. Courts frequently find that employers did not set reasonable or measurable performance standards.
Clear job descriptions, KPIs, and documented expectations are essential to any defensible performance process.
Performance Concerns Were Raised Too Late
Another common problem is sudden performance management.
Employers sometimes tolerate performance issues for months or even years, only to initiate a formal process when frustration reaches a tipping point.
From a legal perspective, this creates problems. If performance concerns were never raised earlier, the employee may reasonably argue they believed their work was satisfactory.
Courts expect performance issues to be addressed promptly and transparently, not accumulated and used later as justification for dismissal.
No Genuine Opportunity to Improve
Under performance management law in NZ, employees must be given a real opportunity to improve before facing dismissal for poor performance.
This means more than simply issuing a warning. Employers must:
- Identify the specific performance issue
- Explain what improvement is required
- Provide a reasonable timeframe
- Offer training, support, or guidance if needed
If an employee is placed on a performance improvement plan that appears designed to fail, the process may be considered procedurally unfair.
Predetermined Outcomes
Another reason performance reviews fail in the Employment Court is that the outcome was already decided before the process began.
If an employer enters performance management with the intention of dismissing the employee regardless of improvement, this undermines the fairness of the process.
Indicators of a predetermined outcome can include:
- Performance meetings framed as disciplinary from the start
- Lack of meaningful engagement with employee responses
- Ignoring improvements or mitigating explanations
Courts look for evidence that employers approached the process with an open mind.
Poor Documentation and Process
Ironically, some performance management cases fail not because the employer acted unfairly, but because the process was poorly recorded.
If the matter reaches the Employment Relations Authority, the employer must demonstrate that each step of the process occurred. Missing records, vague notes, or informal discussions that were never documented can weaken an otherwise reasonable case.
Proper documentation helps show that the employer acted consistently and fairly.
Why This Matters for Employers
Performance management disputes can quickly escalate into formal employment claims.
When a process fails under legal scrutiny, employers may face findings of:
- Unjustified dismissal
- Unjustified disadvantage
- Compensation for humiliation and distress
- Lost wages awards
Beyond financial risk, these disputes can also affect workplace culture and leadership credibility.
A structured, legally compliant performance management framework protects both the organisation and the employee by ensuring expectations are clear and the process is fair.
Practical Steps to Improve Your Performance Management Process
Employers can significantly reduce legal risk by implementing a more structured and transparent approach to performance management.
Set Clear Expectations From the Start
Strong performance management begins long before problems arise.
Ensure employees understand:
- Their job responsibilities
- Performance standards
- How success will be measured
Clear expectations create a fair benchmark for future discussions.
Address Issues Early
Small concerns should be addressed through informal conversations first. Early feedback often resolves issues before formal processes become necessary.
Regular communication also ensures employees are not surprised if performance concerns later become more serious.
Use a Structured Performance Improvement Plan
When formal performance management is necessary, a Performance Improvement Plan (PIP) can help structure the process.
A strong PIP should outline:
- The specific performance issues
- Measurable improvement goals
- Support or training offered
- Review timelines
Importantly, the plan should demonstrate that the employer is genuinely trying to help the employee succeed.
Maintain Fair and Open Communication
Employees should have the opportunity to:
- Respond to feedback
- Provide explanations
- Seek clarification
Fairness in communication is one of the factors most heavily examined by employment authorities.
Seek Employment Lawyer Advice When Needed
Performance management can become legally complex, especially when dismissal is a potential outcome.
Early employment lawyer advice can help ensure the process is compliant with performance management law in NZ, reducing the risk of costly disputes later.
At McKenzie Law, we regularly assist employers in navigating performance management issues, reviewing disciplinary processes, and ensuring workplace decisions align with New Zealand employment law.
Frequently Asked Questions
What is performance management under NZ employment law?
Performance management refers to the process employers use to address and improve employee performance concerns. Under NZ law, the process must be fair, transparent, and consistent with the obligation of good faith.
Can an employee be dismissed for poor performance in New Zealand?
Yes, but only if a fair and reasonable process is followed. The employee must be informed of the concerns, given an opportunity to improve, and supported through a structured process.
What makes a performance review legally unfair?
A performance review may be considered unfair if expectations were unclear, the employee was not given a genuine chance to improve, the outcome was predetermined, or the process lacked transparency.
Do employers need legal advice during performance management?
Not always, but legal advice is often beneficial when performance issues escalate or when dismissal may become a possible outcome. This helps ensure the process complies with NZ employment law.
Performance management is a critical leadership responsibility, but it must also meet the legal standards set by New Zealand employment law.
When handled poorly, performance reviews can easily fail in Employment Court — not because the concerns were invalid, but because the process was flawed.
By setting clear expectations, addressing issues early, and following a structured and fair process, employers can manage performance effectively while protecting their organisation from legal risk.
If you are managing a complex performance issue or want to ensure your internal processes comply with performance management law in NZ, the team at McKenzie Law can help. Our employment law specialists provide practical, strategic advice to employers navigating performance management, disciplinary processes, and workplace disputes. Contact McKenzie Law today to discuss your situation with an experienced employment lawyer.
