How to Manage an Underperforming Employee in New Zealand (Step-by-Step Guide for Managers)

According to data from the Ministry of Business, Innovation and Employment (MBIE), thousands of personal grievance claims are lodged in New Zealand every year, with a significant portion relating to unjustified dismissal or disadvantaged employment conditions. For a manager at Aptitude Management New Zealand, seeing a once productive team member slide into underperformance is a stressful reality. The natural instinct is often to either ignore the issue in hopes it resolves itself or to react with frustration. Both paths are high risk. Ignoring it leads to team resentment and lost productivity, while reacting poorly can lead to costly legal disputes under the Employment Relations Act 2000.

The stakes in the New Zealand market are unique. New Zealand employment law is built on the foundation of good faith, meaning managers cannot simply terminate employment because of a bad week. Managing staff performance issues in New Zealand requires a blend of empathy, absolute clarity, and strict adherence to fair process. When you address poor performance correctly, you protect the business and, in many cases, actually retain a valuable employee who was simply off track.

The Direct Answer

Managing an underperforming employee in New Zealand requires a structured approach rooted in the principle of good faith. Success involves early informal intervention, diagnosing whether the issue is a skill or will gap, setting clear and measurable expectations, and providing documented support. If performance does not improve after reasonable assistance and time, managers must follow a formal, fair process as outlined in the Employment Relations Act 2000 to mitigate the risk of personal grievances.

Diagnostic Triggers: Signs of Poor Performance in Employees

Identifying underperformance early is the best way to prevent a situation from escalating into a legal or cultural crisis. Managers should look for these diagnostic triggers:

1. Inconsistent Output: The employee meets deadlines sporadically or the quality of work varies significantly without a clear reason.
2. Withdrawal: A noticeable drop in participation during team meetings or a lack of engagement in collaborative projects.
3. Increased Error Rate: Simple mistakes in routine tasks that were previously handled competently.
4. Behavioural Shifts: Signs of irritability, defensiveness when receiving feedback, or a general lack of motivation.
5. Impact on Others: Team members picking up the slack or expressing frustration regarding the employee's contributions.

If these triggers are present, it is a signal that leadership intervention is required. Documenting these observations helps move the conversation from subjective opinion to objective fact.

Step 1: Identify the Performance Gap

The first step in managing an underperforming employee in New Zealand is to move away from generalisations. Saying an employee is doing a bad job is not actionable and will likely lead to defensiveness. Instead, you must identify the specific gap between their current output and the required standard.

Review the job description and specific Key Performance Indicators (KPIs). Gather evidence such as missed deadlines, specific errors in reports, or customer complaints. Use facts and data rather than opinions. For example, instead of saying you are often late with reports, say over the last four weeks, three out of four weekly reports were delivered two days past the deadline. This objective approach is essential for maintaining a fair and reasonable process.

Step 2: Diagnose the Cause

Before you can fix the problem, you must understand why it is happening. Underperformance usually falls into one of three categories:

A skill issue occurs when the employee lacks the training or knowledge to perform the task. This is common when roles evolve or new technology is introduced. A clarity issue happens when the employee does not fully understand what is expected of them or how their performance is being measured. A behaviour or will issue is more complex, often involving a lack of motivation, personal issues outside of work, or a misalignment with company values.

Understanding the cause determines your next step. You cannot coach someone out of a lack of technical knowledge, and you cannot train someone out of a lack of motivation.

Step 3: Address the Issue Early (Informal Conversation)

New Zealand law emphasizes the no surprises principle. You should never wait for an annual performance review to raise concerns. Arrange a private, informal discussion as soon as a pattern of underperformance emerges.

The goal of this conversation is to bring the issue to the employee's attention and hear their perspective. Start with curiosity rather than accusation. Use the specific examples you gathered in Step 1. This is an opportunity for the employee to explain any barriers they are facing.

During this stage, refer to effective techniques for giving feedback to ensure the conversation remains constructive. You can find more on this in our guide on how to give feedback to employees.

Step 4: Set Clear Expectations and Provide Support

Once the issue is out in the open and you have diagnosed the cause, you must define the path back to success. This involves creating clear, agreed expectations.

What exactly needs to change?
By when does the change need to happen?
How will we measure this change?
What support will the company provide?

Support might include additional training, closer supervision, or a temporary reduction in workload to allow for upskilling. In the New Zealand context, failing to provide the support you promised can undermine any future formal action. Ensure every agreement is followed up with a written summary provided to the employee.

Step 5: Monitor and Escalate if Required

After the informal session, monitor the performance closely over a set timeframe, typically two to four weeks depending on the role. Provide regular, brief check-ins to offer encouragement or course correction.

If performance improves, acknowledge it. Positive reinforcement is a powerful tool for sustaining change. However, if there is no improvement despite the support provided, you may need to move to a formal process, such as a Performance Improvement Plan (PIP).

A formal PIP is a more serious stage that signals the employee's position may be at risk if standards are not met. For a detailed breakdown of this formal stage, refer to our article on performance improvement plan nz.

What Managers Get Wrong

Many managers find performance conversations uncomfortable, which leads to common errors that can jeopardise the business.

Avoiding the issue is the most frequent mistake. Managers hope the person will just get better or eventually quit. This rarely happens and usually results in the rest of the team becoming disengaged.

Another mistake is jumping straight to formal action without an informal attempt to resolve the issue. In New Zealand, this is often seen as a breach of the fair process requirements.

Making it personal is also a major pitfall. Focus on the work and the standards, not the person’s character. Finally, a lack of documentation is the fastest way to lose a personal grievance claim. If it is not written down, in the eyes of the law, it never happened.

NZ Legal Considerations

When managing poor performance nz, you must adhere to the Employment Relations Act 2000. The key pillars are:

Good Faith: Both parties must be active and constructive in establishing and maintaining a productive relationship. You must be open and communicative.
Fair and Reasonable Process: You must give the employee a real opportunity to improve. This includes telling them what the problem is, giving them a chance to respond, and providing the necessary support to get better.
Right to Respond: Before any decisions are made regarding their employment, the employee must have the chance to give their side of the story.
No Surprises: Employees should not be blindsided by performance allegations they haven't heard before.

Case Example: A Tale of Two Approaches

Consider a mid-level manager in Auckland named Mark who has a team member, Sarah, whose report accuracy has dropped significantly.

In the first scenario, Mark gets frustrated and says nothing for three months. Eventually, he loses his temper in a team meeting and tells Sarah her work is useless. Sarah feels bullied and lodges a personal grievance for a hostile work environment. The company ends up paying a settlement, and Sarah leaves, leaving a hole in the team.

In the second scenario, Mark notices the trend in week two. He sits down with Sarah privately and points out the errors. Sarah reveals she is struggling with a new software update. Mark organises a one hour training session for her and checks her reports every Friday for a month. Sarah's accuracy returns to 100 percent, and she feels supported by her manager.

The second scenario requires more effort upfront but saves the company thousands in potential legal fees and recruitment costs.

When This Approach Works vs When It Won’t

The structured approach described above is highly effective when dealing with skill gaps, temporary personal issues, or role confusion. It builds trust and shows that the organisation is committed to its people.

However, this approach will struggle when there is ongoing behavioural resistance or a fundamental refusal to follow instructions. If an employee is capable of doing the work but simply chooses not to despite repeated interventions, the process shifts from performance management to a disciplinary matter regarding misconduct.

Summary

Managing an underperforming employee in New Zealand is about being proactive and structured. By acting early, focusing on facts, and following a fair process, you fulfil your legal obligations and your leadership responsibilities. Most underperformance is a result of a lack of clarity or a lack of support. Addressing these gaps is the most direct route to a high performing team.

If your managers struggle with these conversations, it is usually a capability gap, not a people issue. Effective performance management is a skill that can be developed through structured training.

At Aptitude Management New Zealand, we provide performance management training that equips leaders with the proprietary strategies needed to handle these situations with confidence. Our training is supported by a 3-Phase Learning Transfer framework, ensuring that the skills learned in our workshops are actually applied in the workplace through Before, During, and After support.

Explore our upcoming performance management training sessions

Trainer’s Perspective

In my experience delivering management courses across Auckland and Wellington, the biggest hurdle for managers is the fear of the "difficult conversation." Many leaders worry that addressing underperformance will damage the relationship. In reality, being unclear is unkind. When managers use a structured framework, they remove the emotion and focus on the professional standards. This article provides that framework, helping managers act with confidence while remaining legally compliant.

The Aptitude Team

NZ Aptitude Management is a leading provider of professional development and training throughout New Zealand. We specialise in equipping mid-level leaders and frontline managers with practical, experience-led strategies to navigate the complexities of modern management. Our proprietary 3-Phase Learning Transfer framework ensures that our training delivers a measurable business impact, transforming leadership capability from the ground up.