Triangular Employment in New Zealand

Labour hire can be a great way to scale up quickly, cover seasonal peaks, or fill specialist roles without committing to a permanent headcount straight away.

But if you’re bringing workers into your business through an agency (or supplying workers to other businesses), you need to understand a concept that catches a lot of SMEs off guard: triangular employment.

Triangular employment is one of those legal terms that sounds abstract until there’s a performance issue, a dismissal, a bullying complaint, or a health and safety incident. That’s when businesses often realise there’s more than one “employer” involved in practice - and that the law may treat the host business as having real obligations to the worker, even if you never signed the employment agreement.

Below, we break down how triangular employment works in New Zealand, when it applies, what your legal obligations can look like (as a host business or as a labour hire provider), and how to set things up properly from day one.

What Is Triangular Employment (And Why Does It Matter For Small Businesses)?

Triangular employment usually describes a working arrangement involving three parties:

The worker (the individual doing the work)
The employer (often the labour hire provider/agency that employs the worker and pays them)
The “controlling third party” (the host business where the worker actually performs the work day-to-day)

In many labour hire arrangements, the host business directs the worker’s daily tasks, sets rosters, supervises performance, and controls the workplace environment - even though the worker’s employment agreement is with the agency.

This matters because New Zealand law recognises that, in reality, the host business can have significant control over the worker’s employment experience. Under the Employment Relations Act 2000, a worker may be able to apply to have the host business (as a controlling third party) joined to a personal grievance claim in certain circumstances, so that remedies can be considered against the host as well as the formal employer.

So if you’re thinking, “We didn’t hire them, the agency did”, don’t assume that ends the story. Triangular employment is designed to reflect what’s actually happening in your workplace.

When Does Triangular Employment Apply In New Zealand?

Triangular employment in NZ is most commonly linked to labour hire, but the key legal question is usually whether the host business is a controlling third party (sometimes shortened to “CTP”).

While each situation turns on its facts, a host business is more likely to be a controlling third party if it has real control or direction over things like:

the worker’s daily duties and priorities
when, where, and how work is performed
workplace rules and behaviour standards
performance feedback and discipline processes (even informally)
access to work (for example, if the host can effectively “end” the assignment)

In contrast, if the agency genuinely supervises the worker and the host has minimal involvement beyond receiving deliverables, the arrangement may look less like triangular employment (and more like a standard supplier relationship).

Common Examples Of Triangular Employment

Seasonal labour brought in through an agency for warehousing, packing, or distribution.
Construction labour hire where workers are allocated to a site and supervised by the principal contractor or site manager.
Hospitality roster cover where agency staff work shifts under your duty manager’s supervision.
Manufacturing line workers supplied by a third party but trained and directed by your supervisors.

Why This Has Become A Bigger Deal

New Zealand introduced reforms specifically dealing with triangular employment so that workers aren’t left without practical remedies when the business controlling their working day is not the formal employer.

From a business perspective, this means you should treat labour hire arrangements as more than just “someone else’s HR problem” - because if something goes wrong, you may be pulled into the legal process.

What Employer Obligations Can Fall On The Host Business?

If you use labour hire staff, you’re not automatically their employer. However, you can still have serious obligations - and potential exposure - because of your control and influence over their working conditions.

Here are the major areas small businesses should get right.

1) Employment Relations Risk (Including Personal Grievances)

In triangular employment situations, a worker may be able to take steps to involve the controlling third party in a personal grievance process (for example, by applying to have the host joined to the claim), if the host’s actions contributed to the grievance in a way covered by the legislation.

For example, if there’s an allegation of unjustified dismissal or unjustified disadvantage, the host business may be named in the process if its conduct (or decisions) were part of what happened. That said, it’s not automatic in every situation: whether a host is joined, and what remedies might apply, will depend on the facts and the statutory test.

This is where businesses can get caught out. A common scenario is:

You tell the agency “don’t send that worker back”.
The agency ends the placement and/or terminates employment.
The worker challenges what happened, and your business is alleged to have caused or influenced the outcome.

Even if the agency signs the termination letter, the host’s role may still be examined.

2) Health And Safety Duties Still Sit With You

Under the Health and Safety at Work Act 2015, you can’t contract out of health and safety. If labour hire workers are in your workplace, doing your work, using your equipment, and following your instructions, you will almost certainly owe duties to keep them safe.

That includes practical steps like:

providing a safe work environment and safe systems of work
training and supervision (especially for high-risk tasks)
hazard identification and incident reporting processes
making sure PPE is available and actually used where required

If you’ve got a labour hire provider involved, you’ll often need to coordinate and cooperate on health and safety, but you should assume regulators will expect you to take an active role.

3) Workplace Policies Apply In Practice (Even If You Didn’t “Employ” Them)

If labour hire staff are working in your team, your workplace expectations still need to be clear - particularly around conduct, harassment, bullying, use of equipment, and confidentiality.

It’s usually a smart move to have a clear Workplace policy framework and ensure labour hire workers are inducted into the parts that apply to them.

This isn’t about being overly formal. It’s about reducing “grey areas” that lead to disputes later (for example, a worker being performance-managed without knowing the standards they’re being held to).

4) Confidentiality And Data Handling Still Matter

Labour hire workers often get access to customer data, pricing, supplier details, internal systems, and commercially sensitive information.

Even if their employment agreement is with the agency, you should still think about confidentiality obligations and access controls on your side, including what happens when the assignment ends.

Depending on your business, privacy compliance can also come into play (for example, if the worker is handling customer personal information in your systems). If you’re collecting and storing personal information about workers (such as ID documents for site access), you may need processes aligned with the Privacy Act 2020.

What Should Be In Place Before You Bring Labour Hire Staff Into Your Business?

When triangular employment is set up properly, it can work smoothly for everyone involved.

The goal is to make sure the legal responsibilities match the reality of how the work will be done - and to avoid accidental “handover” of decisions that should be handled carefully (like discipline and termination).

1) Have A Clear Agreement With The Labour Hire Provider

Your agreement with the provider should clearly document what each party is responsible for, including day-to-day supervision, health and safety coordination, site access rules, and how issues are escalated.

For many businesses, a tailored Labour hire agreement is a practical way to get this right.

Some key clauses to consider include:

Scope of services: roles, duties, and any qualification/licensing requirements.
Who directs work: what supervision you provide vs what the agency provides.
Health and safety: inductions, PPE, incident reporting, notifiable events, and cooperation duties.
Performance concerns: how issues are raised, documented, and managed.
Ending an assignment: notice requirements, reasons, and how communication occurs.
Confidentiality and IP: ownership of work product and protection of trade secrets.
Liability and indemnities: carefully drafted risk allocation (these need to be done properly to be meaningful).

Templates can miss the point here, because triangular employment risk depends on how your workplace actually operates.

2) Be Clear About Who Handles “HR Decisions”

A big risk area in triangular employment is when the host business effectively manages a worker like an employee, but without the protections and process that normally sit around employment decisions.

As a host business, it’s generally safer if:

you provide feedback about performance or conduct (fact-based and documented), and
the agency leads any formal disciplinary process or termination decisions (following proper process).

That doesn’t mean you can’t set expectations, manage safety, or require professionalism in your workplace. It just means you should be careful about making “final calls” in a way that could be seen as driving an unjustified outcome.

3) Align On Employment Documentation (Even If You’re Not Signing It)

If you are the labour hire provider, your Employment Contract with the worker should reflect the triangular nature of the arrangement - for example, that the worker may be assigned to different host businesses and may be subject to host site rules.

If you’re the host business, you usually won’t be issuing the employment agreement, but you should still understand what the worker has been told about:

hours and rostering expectations
pay and allowances (especially if your site has special conditions)
who they report to day-to-day
site policies and behavioural standards

Misalignment here is a common cause of disputes, especially when a worker thinks they’re effectively “your employee” because your managers roster and direct them.

4) Don’t Accidentally Treat Contractors As Labour Hire (Or Vice Versa)

Sometimes a business thinks they’re using contractors, but the arrangement looks more like employment (or triangular employment). Getting this wrong can create multiple legal problems, including disputes about employment status.

If you engage individuals directly as contractors, you’ll usually want a properly drafted Contractors agreement that reflects genuine independent contracting (and the reality of how work is performed).

Where there’s a labour hire provider, the risk is slightly different: the person might be an employee of the agency, but you might still be treated as the controlling third party.

Either way, clarity up front saves a lot of pain later.

How Do You Manage Performance Issues Or End A Labour Hire Assignment Safely?

This is where many businesses slip up - usually because they’re acting quickly to solve an operational problem.

The key is to slow down just enough to follow a fair and consistent process (without turning it into unnecessary bureaucracy).

A Practical Process You Can Use

Document the issue: record dates, times, what happened, and who witnessed it. Stick to facts.
Check whether it’s a safety issue: if there is immediate risk, take immediate steps to make the workplace safe.
Raise it with the agency early: avoid surprising them with a “don’t send them back” instruction without context.
Clarify what you want: do you want extra training, a warning, a change of duties, or an end to the assignment?
Let the agency run any formal employment steps: especially where warnings or dismissal may be involved.
Control messaging internally: your supervisors should know who is authorised to speak to the agency and the worker about next steps.

If the worker is leaving your site, think about offboarding basics too: return of keys, uniforms, devices, and removal of system access.

If your business is making decisions that could effectively end the worker’s employment (even indirectly), it’s worth getting legal guidance early, particularly if you’re dealing with repeated issues or a sensitive complaint.

Where your business is terminating its own employees, a clear process (and the right documents) is critical. Depending on your situation, an Employee termination documents suite can help ensure you’re following a consistent and legally safer approach.

Common Triangular Employment Mistakes (And How To Avoid Them)

Triangular employment problems tend to come from mismatch: what the contract says versus what happens day-to-day.

Here are some of the most common pitfalls we see in small businesses.

1) Treating Labour Hire Staff Like “Instant Employees” Without The HR Framework

It’s normal that labour hire staff integrate into your team. But if your managers start disciplining, threatening dismissal, or making high-stakes decisions without involving the agency, you may be increasing your risk as a controlling third party.

Fix: agree upfront who does what, and train your supervisors on the escalation pathway.

2) No Clear Paper Trail With The Agency

If there’s a dispute later, it helps to be able to show:

what the agency was told
what you observed
what steps were taken before a placement ended

Fix: keep communications in writing where possible and document key incidents.

3) Loose Health And Safety On Inductions

Because labour hire can be “temporary”, businesses sometimes rush onboarding. Unfortunately, the risk (and liability) can be immediate, especially in higher-risk workplaces.

Fix: use a consistent induction checklist for all new starters, including labour hire workers, and coordinate with the agency on training records and competencies.

4) Relying On Generic Terms That Don’t Fit Your Business

Many standard labour hire terms are one-sided or too vague to be useful when something actually goes wrong.

Fix: have the arrangement reviewed or drafted with your specific operational realities in mind. If you’re negotiating terms you’ve been given by a provider, a Contract review can help you understand what risk you’re accepting and what you should push back on.

5) Forgetting The Long-Term Commercial Angle

Even if you’re comfortable operationally, triangular employment can affect:

your reputation as an employer/host
your ability to win contracts (especially where compliance is required)
your risk profile for disputes and downtime

Fix: treat labour hire as part of your core workforce strategy and set it up properly, not as an “informal workaround”.

Key Takeaways

Triangular employment typically involves a worker, an employer (often a labour hire agency), and a host business that controls day-to-day work as a controlling third party.
Even if you didn’t sign the employment agreement, your business may still face employment relations risk where (in certain cases) a worker applies to have the host joined to a personal grievance, because the host’s actions or decisions materially affected the situation.
Your health and safety duties generally still apply to labour hire workers in your workplace under the Health and Safety at Work Act 2015.
A well-structured labour hire arrangement should clearly cover supervision, policies, performance management escalation, health and safety responsibilities, and how assignments end.
Be careful about “quick decisions” like telling an agency not to send a worker back - these situations can escalate into disputes if process and documentation aren’t handled carefully.
Getting legal foundations right from day one (including agreements, policies, and clear processes) makes labour hire a safer and more scalable option for your business.

If you’d like help setting up or reviewing a labour hire arrangement, or you want advice on your obligations in a triangular employment situation, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.

Triangular Employment In New Zealand: Labour Hire Obligations For Businesses