Dual Employment In New Zealand: Employer Legal Obligations

If you employ people in New Zealand, chances are you’ll eventually deal with dual employment.

Maybe your part-time team member also works for another café down the road. Maybe your senior staff member does consulting on the side. Or maybe you’ve discovered someone is doing shifts for a direct competitor on weekends.

Dual employment can be completely normal - and sometimes it’s even beneficial (for example, employees gaining skills elsewhere). But if you don’t manage it properly, it can create very real legal and commercial risks for your business.

This guide explains what dual employment is, what you can (and can’t) do as an employer, and the practical steps you should take to protect your business from day one.

This article is general information only and isn’t legal advice. If you need help with your specific situation, it’s best to get tailored advice.

What Is Dual Employment (And Why Does It Matter For Employers)?

Dual employment usually refers to a situation where an employee has:

• two jobs at the same time (two separate employers); and/or
• a job with you while also running a side business (sometimes in the same industry); and/or
• employment plus contracting work elsewhere.

From a legal perspective, the fact that an employee works elsewhere is not automatically a problem. Many employees are free to have more than one job.

Where it does matter for you is when that second job (or side hustle) impacts any of the following:

• performance (fatigue, lateness, decreased productivity)
• availability (clashes with rosters, peak periods, training days)
• health and safety (overwork, unsafe fatigue levels)
• conflicts of interest (working for competitors, suppliers, or clients)
• confidentiality and IP (business information being used elsewhere)
• reputation (public statements, social media conduct, customer confusion)

In other words: dual employment isn’t “illegal” - but unmanaged dual employment can expose you to disputes, compliance issues, and loss of value in your business.

Is Dual Employment The Same As “Secondary Employment”?

You’ll often see it described as secondary employment (meaning another job outside their role with you). Most employment agreements deal with it under “secondary employment”, “outside work”, “conflicts of interest”, or “restraints”.

The key for employers is clarity: what you expect, what needs to be disclosed, and what happens if there’s a conflict.

Can You Restrict Dual Employment In New Zealand?

You can’t assume you can ban dual employment across the board and have it enforced in every situation. However, you can put reasonable protections in place - especially where the other work could genuinely harm your business or create a health and safety risk.

In New Zealand, your approach should align with general employment law principles (including good faith under the Employment Relations Act 2000). That typically means restrictions should be:

• reasonable in scope (not broader than necessary)
• connected to a legitimate business interest (not just control)
• clearly communicated in writing
• applied fairly and consistently

Common “Reasonable” Restrictions (When Drafted Properly)

Depending on your business and the employee’s role, it may be reasonable to require that they:

• tell you about outside work if it could create a conflict
• get written consent before working for a competitor
• do not use your confidential information or systems for another job
• do not represent themselves as acting for your business while doing other work
• do not work excessive hours that create a fatigue-related safety risk

These rules are usually implemented through a well-drafted Employment Contract plus supporting workplace policies.

When Restrictions Can Become Risky

Restrictions around dual employment can become problematic if they’re too broad or not tailored to your circumstances. For example:

• you try to block any secondary employment, even when there’s no clear conflict or safety issue
• you impose restrictions after employment starts without properly consulting, or without the employee’s agreement
• you discipline an employee for outside work without investigating whether it actually affects your business (and without following a fair process)

If you’re dealing with a tricky situation - especially involving competitors or senior staff - it’s worth getting advice early so you don’t escalate the issue into a personal grievance risk.

Key Legal Risks Of Dual Employment (What You Need To Watch For)

Dual employment creates a few “pressure points” for employers. Here are the big ones we see in practice for small businesses.

1) Conflicts Of Interest And Competition Risks

A conflict of interest can come up when an employee’s outside work could influence (or appear to influence) how they act in your business.

Examples include:

• your employee also works for a direct competitor
• they have a side business targeting the same customers
• they work for one of your suppliers or clients (which could affect pricing, referrals, or information sharing)

This is where clear disclosure and management processes matter. Many businesses use a dedicated Conflict Of Interest Policy alongside employment agreements so staff know what must be declared and how conflicts are handled.

2) Confidentiality, Trade Secrets, And Client Relationships

Even if an employee isn’t “stealing” anything, dual employment can create accidental leakage of business information - especially in small industries where everyone knows everyone.

Make sure your employment agreement clearly covers:

• what counts as confidential information
• how it must be stored/used
• what happens when employment ends

This is often dealt with through a strong confidentiality clause that fits your business (for example, protecting pricing, supplier terms, processes, client lists, and marketing plans).

3) Fatigue And Health And Safety Obligations

Dual employment can create real health and safety issues, particularly where an employee works long hours across multiple jobs (for example, early morning shifts plus late-night work).

Under the Health and Safety at Work Act 2015, you must take reasonably practicable steps to keep workers safe. That can include managing fatigue risks - even if some of the risk comes from work performed elsewhere.

Practically, that means you should:

• monitor signs of fatigue (especially in safety-sensitive roles)
• design rosters responsibly
• encourage staff to disclose if they’re working excessive hours overall
• document your approach if you need to make changes for safety reasons

You don’t necessarily control what an employee does in their own time, but you do control how you respond when fatigue becomes a foreseeable risk at work.

4) Working Time, Leave, And Payroll Issues

Dual employment can also complicate working arrangements and entitlements. While each employer usually manages leave and pay separately, issues can pop up around:

• roster clashes and availability (particularly for casual and part-time arrangements)
• public holidays (where the employee works different patterns across two jobs)
• stress and burnout leading to sick leave

Your obligations under the Holidays Act 2003 still apply to your employment relationship - regardless of what the employee does elsewhere.

5) Privacy And Handling Employee Disclosures Properly

Managing dual employment often involves collecting information (for example, where else someone works, what duties they perform, and what hours they do).

Under the Privacy Act 2020, you should only collect what you reasonably need, explain why you’re collecting it, and store it securely.

Many small businesses forget that privacy obligations apply to employee information too. Having a clear Privacy Policy (and internal HR privacy practices) helps set expectations and reduces the chance of complaints.

How To Manage Dual Employment In Practice (A Step-By-Step Employer Checklist)

When handled well, dual employment doesn’t need to be disruptive. Here’s a practical framework you can follow.

Step 1: Decide What You Actually Need To Protect

Start by identifying your legitimate business interests. For most small businesses, these are usually:

• confidential information and know-how
• customer relationships and goodwill
• stable staffing and reliable availability
• health and safety (including fatigue management)
• brand reputation

This matters because your contract clauses and policies should match your real risks - not generic template wording.

Step 2: Use Clear Disclosure Rules (And Make Them Easy To Follow)

A common mistake is only finding out about a second job when there’s already a problem (for example, repeated lateness or customers mentioning it).

Instead, set up a simple disclosure expectation, such as:

• employees must disclose secondary employment that overlaps with your industry, your customers, or your operating hours
• employees must disclose any work that could create fatigue or safety issues
• employees must not start work with a competitor without written approval

Then, when someone discloses outside work, you can assess it calmly and document the outcome (approved, approved with conditions, or not approved).

Step 3: Set Boundaries Around Competitors And Poaching

If your employee is working for a competitor, the situation can be high-risk - but your response should still be measured and legally fair.

Often the most effective (and most enforceable) approach is to focus on clear boundaries, such as:

• no soliciting your customers for the other business
• no using your pricing, supplier terms, or marketing plans elsewhere
• no “dual representation” (creating confusion about who they work for)

For some roles (especially senior roles), you might also consider a properly tailored Non-Compete Agreement or other restraint provisions. These can be useful in the right circumstances, but they need to be drafted carefully to be enforceable in New Zealand (and they’re typically assessed on what’s reasonable and necessary to protect legitimate business interests).

Step 4: Manage Performance Issues Separately From “Outside Work”

Even if you suspect a second job is the reason someone is underperforming, it’s generally safer to deal with the workplace issue first:

• Are they meeting the requirements of their role with you?
• Are they turning up on time and fit for work?
• Are they meeting KPIs, quality expectations, and behavioural standards?

If the answer is no, follow a fair process. Don’t jump straight to “you must quit your other job” unless it’s genuinely necessary (and supported by the contract/policies).

Step 5: Include Social Media And Reputation Expectations

Dual employment sometimes becomes public through social media, online reviews, or customer-facing content. This can be a real issue if:

• an employee promotes their other business while on shift with you
• they present themselves as representing your business when they’re not
• they publish content that harms your reputation

Setting expectations around employee social media use can help you address these issues early and consistently.

What Should You Put In Your Employment Agreements And Policies?

If you want to manage dual employment properly, your legal documents do most of the heavy lifting. The goal is to be clear, fair, and enforceable.

Here are the key areas to consider.

Secondary Employment Clause

A good secondary employment clause usually covers:

• whether outside work is allowed in principle
• what types of outside work must be disclosed
• when written consent is required
• what factors you’ll consider (conflicts, fatigue, performance, confidentiality)
• what happens if the employee fails to disclose or breaches the clause

This is best built into the employee’s Employment Contract so it’s clearly agreed from the start.

Confidentiality And Intellectual Property (IP) Protections

Dual employment increases the risk that staff will “carry” valuable know-how between businesses - sometimes unintentionally.

Your agreements should clearly set out:

• confidentiality obligations during and after employment
• who owns work product created as part of their role
• expectations around systems, devices, and data access

For many businesses, the confidentiality section is the single most important protection to get right.

Conflict Of Interest Process

A clause alone often isn’t enough - you also want a practical process your managers can follow. That’s where a Conflict Of Interest Policy is useful, especially if you have multiple staff and want consistent decision-making.

It should explain:

• what counts as a conflict (with examples relevant to your industry)
• how staff must disclose conflicts
• how your business will assess and manage them
• what happens if conflicts aren’t disclosed

Restraints (Where Appropriate)

Restraints can help in specific situations, but they’re not “set and forget”. They need to be reasonable, and they should reflect the seniority of the role and the risk to your business. Even then, whether a restraint is enforceable depends on the circumstances, and courts/tribunals may refuse to enforce (or may modify) restraints that go further than necessary.

Depending on your situation, this might include:

• non-solicitation of customers
• non-solicitation of staff
• non-compete (usually the highest-risk clause to enforce)

If you’re considering a restraint, a tailored Non-Compete Agreement can be a good option, particularly for key staff who have access to sensitive information.

Privacy And Monitoring (If Relevant)

Some businesses try to manage dual employment through monitoring (for example, checking rosters, investigating complaints, reviewing device usage, or using CCTV). This is an area where you should be careful.

As an employer, you should ensure that any monitoring is:

• lawful
• reasonable and proportionate
• transparent (staff should know what’s happening and why, subject to any lawful exceptions)
• aligned with your privacy obligations

Having a clear Privacy Policy and internal workplace privacy practices helps you avoid collecting more information than you need.

Key Takeaways

• Dual employment is common in New Zealand, but it can create legal and commercial risks if you don’t manage it clearly.
• You may be able to restrict secondary employment in some cases, but restrictions should be reasonable and linked to genuine business interests (like conflicts, confidentiality, performance, or health and safety).
• Key risk areas include conflicts of interest, confidentiality/IP leakage, fatigue and safety, performance management, and privacy compliance.
• The strongest protection usually comes from a well-drafted secondary employment clause in the employment agreement, backed by a practical disclosure process.
• Use policies to make expectations easy to follow in day-to-day operations, including a conflict of interest process and clear reputation/social media expectations.
• If you’re dealing with a competitor situation or key staff member, tailored legal drafting (including appropriate restraints) can help you protect your business from day one.

If you’d like help updating your employment agreements or setting clear rules around dual employment, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.