Are Zero-Hour Contracts Legal In New Zealand? What Employers Need To Know

If your business has peaks and troughs (think retail rushes, hospitality weekends, seasonal services, or projects that come in waves), flexible staffing can feel essential.

That’s often where the idea of zero-hour contracts comes up: “Can we hire someone but only roster them when we need them?”

In New Zealand, the law has moved a long way from the “on-call with no certainty” approach that zero-hour arrangements are known for. You can build flexibility into your workforce - but you need to do it the right way, because a traditional “zero-hour contract” (as people commonly mean it) can quickly become non-compliant.

Note: This article is general information for New Zealand businesses and isn’t legal advice. If you need advice for your situation, it’s worth getting specific guidance.

Below, we’ll break down what “zero-hour contracts” usually mean, what the law requires in NZ, and practical ways to structure work so you stay compliant and protect your business.

What Are “Zero-Hour Contracts” (And Why Do Businesses Use Them)?

A “zero-hour contract” is a common term, but it’s not a formal category under New Zealand employment law. In practice, people usually mean an employment arrangement where:

• the employee has no guaranteed minimum hours (or close to none);
• the employer can offer shifts as needed;
• the employee may feel pressure to accept shifts when offered (even if not expressly required); and/or
• the employee might not have predictable income week to week.

From a small business perspective, it’s easy to see the appeal. You get:

• cost control (you’re not paying for quiet periods);
• operational flexibility (you can scale staff up and down); and
• less rostering risk if demand is unpredictable.

The issue is that NZ law aims to stop employers from shifting all of the commercial risk onto workers without providing certainty or fair compensation - especially where workers are expected to be available “just in case”.

Are Zero-Hour Contracts Legal In New Zealand?

There isn’t a blanket ban on having no guaranteed hours in every situation. However, the kind of “zero-hour contract” many people have in mind - where an employee has no guaranteed hours but is still expected to be available (or is treated poorly for saying no) - is high-risk and often unlawful under New Zealand’s rules on availability and fairness.

New Zealand’s employment framework (primarily the Employment Relations Act 2000, as amended) introduced rules to address common zero-hour style practices. These reforms focus heavily on:

• requiring certainty around hours where possible, including recording agreed hours in writing;
• regulating availability provisions (i.e. clauses requiring an employee to be available for work beyond guaranteed hours); and
• ensuring employees are compensated if you want them “on call”, and protecting their ability to decline work where the legal requirements aren’t met.

Important nuance: It is still possible to employ someone on a genuine “as needed” basis in some situations, but the arrangement must be drafted and used carefully. A contract that says “0 hours guaranteed” while also expecting the employee to keep themselves available (or punishing them for declining shifts) is where businesses get into trouble.

If you’re not sure whether your current arrangement crosses the line, it’s worth having your Employment Contract reviewed sooner rather than later - it’s typically far easier to fix paperwork upfront than to respond to a complaint or dispute down the track.

Availability Clauses: The Big Legal Risk For Employers

A lot of “zero-hour contracts” aren’t really about zero hours - they’re about availability.

An availability provision is a clause that says the employee must be available to accept work beyond any guaranteed hours. Under NZ law, these clauses are regulated because they can be unfair if they tie someone to your business without guaranteeing income.

When Can You Use An Availability Provision?

Generally, you should only include an availability requirement if:

• there are genuine reasons based on reasonable grounds for needing that availability (for example, unpredictable demand that you can’t reasonably roster in advance); and
• the contract provides reasonable compensation for being available.

In plain terms: if you want someone to keep time free for you, you’ll usually need to pay something for that commitment.

It’s also important to understand the consequence if you don’t meet the legal requirements: an employee may be entitled to refuse work made available under an availability provision that isn’t compliant (for example, where there’s no reasonable compensation).

Why This Matters In Practice

Even if your written contract says “you don’t have to accept shifts,” your day-to-day practices can create risk. For example, problems arise if:

• managers regularly guilt staff into accepting shifts;
• staff who decline shifts get fewer shifts later (even informally);
• rosters are issued at the last minute and staff are expected to “make it work”; or
• there’s an unspoken rule that employees must be available.

This is where clear policies and training matter. If you’re building out your people processes, it can also help to align employment documents and internal rules (including privacy and monitoring expectations where relevant) - for example, if you use scheduling apps or timekeeping systems, your approach should fit within an Workplace Policy framework.

How Can Small Businesses Create Flexible Rosters Without “Zero-Hour Contracts”?

The goal for most employers isn’t to create uncertainty - it’s to keep the business running smoothly without overcommitting on wages.

Here are practical, more legally robust alternatives to “zero-hour contracts” that many NZ small businesses use.

1) Offer A Realistic Minimum Hours Guarantee

If you know you’ll usually need at least some hours each week, consider guaranteeing a minimum (even if it’s modest). For example:

• “Minimum 10 hours per week, with additional hours as required.”

This creates clearer expectations on both sides. It also reduces the likelihood that a role is treated as “on-call” in substance.

From a business perspective, it can help with retention too - staff are more likely to stick around when they can budget and plan.

2) Use Part-Time Agreements For Predictable Patterns

If there’s a reasonably stable pattern (e.g. Friday nights, weekends, school hours), a part-time arrangement can be cleaner than a “casual but regular” approach.

A well-drafted contract can still allow for additional hours by agreement, but the baseline is predictable.

3) Consider Genuine Casual Employment (But Be Careful)

Casual work can be appropriate where the work is genuinely intermittent or unpredictable and there’s no ongoing expectation of regular hours.

The key word is genuine. If someone is working consistent weekly shifts for months, they may not be “casual” in reality, even if the contract uses that label.

It’s worth understanding what casual work means in a compliance sense, including leave treatment. If you’re relying on casual labour, make sure you understand casual workers’ leave entitlements and how to document the relationship properly.

4) Use Fixed-Term Agreements For Short Peaks (Where Legitimate)

If you have a clear temporary need (e.g. maternity cover, a defined seasonal project, a specific contract), a fixed-term agreement might work.

But fixed-term employment has strict rules around having a genuine reason and documenting it properly - it can’t be used just to avoid obligations.

5) Build A Relief/On-Call Pool With Proper Compensation

If you truly need an “on-call” pool (common in healthcare-adjacent services, security, certain trades, or last-minute event staffing), the arrangement should be carefully drafted to manage:

• availability windows;
• compensation for being available;
• minimum notice or cancellation rules; and
• what happens if work isn’t provided.

It’s also worth considering whether your rostering/cancellation approach triggers other legal requirements. For example, if you require employees to be available, or you cancel shifts within certain timeframes, there may be additional obligations (including around notice and compensation) depending on how the arrangement is structured.

This is a classic area where getting the contract language right matters, because you’re balancing flexibility against legal risk and staff goodwill.

Common Mistakes Employers Make With Zero-Hour Style Arrangements

Most issues we see aren’t caused by “bad employers” - they usually come from moving fast, copying an old template, or applying informal practices that feel normal in the industry.

Here are a few red flags to watch for.

1) Relying On Labels Instead Of Reality

Calling someone “casual” or writing “0 hours” doesn’t automatically make the arrangement lawful. What matters is:

• how predictable the work is;
• whether there’s an expectation the employee will accept shifts; and
• how the relationship functions day to day.

2) Using Availability Clauses Without Compensation

If your contract requires availability but doesn’t provide reasonable compensation (and doesn’t clearly justify the need), you’re exposed.

That exposure can show up as:

• an employee raising a dispute;
• involvement from the Labour Inspectorate; or
• costly time spent defending an arrangement you could’ve restructured early.

3) Cancelling Shifts Last Minute Without Clear Rules

Some businesses roster ahead, then cancel when trade is slow. If that’s a regular practice, it’s worth putting clear boundaries in place.

Even where cancellation is allowed, you’ll want to manage this carefully to avoid arguments about fairness, good faith, and whether the business is effectively shifting commercial risk onto staff.

It’s also smart to ensure your agreement clearly sets out what happens if shifts are cancelled (including any required notice and any compensation/payable amounts) so your practice matches your paperwork.

4) Treating Employees Like Contractors (Or Vice Versa)

When hours are variable, some businesses consider engaging workers as contractors instead of employees.

This can be high-risk if the person is really working like an employee (set hours, under your control, integrated into the business). Misclassification can lead to liability for leave entitlements and other employee protections.

If you’re considering this route, it’s worth getting advice early and using a properly drafted Contractors Agreement where appropriate.

What Should You Put In Your Employment Documents To Stay Compliant?

If your business needs flexibility, your employment documents should do more than “tick the box”. They should reflect how you actually roster staff and how you want the relationship to work when it’s busy (and when it’s quiet).

Depending on your model, your employment contract may need to cover things like:

• Guaranteed hours (even if modest) and how additional hours are offered
• Availability expectations (if any), the business reasons for them, and compensation
• Rostering process: how far in advance rosters are issued, how changes are handled, and how staff accept shifts
• Cancellation rules: when shifts can be cancelled, what notice is required, and what happens (including any compensation) if they are
• Pay and record-keeping: ensuring wages, time records, and holiday pay are handled correctly
• Leave and holidays: especially if hours vary significantly week to week

Two practical tips that can save you headaches:

• Make sure your contract and your rostering habits match. A perfectly drafted contract won’t help if your managers apply a different “unwritten” rule in practice.
• Don’t DIY important clauses. Availability, cancellations, and variable hours can create legal risk quickly if they’re not drafted for your specific business model.

If you’re updating terms across your team, it’s also worth remembering you generally can’t just unilaterally change key employment terms without proper process. If your plan involves forcing employees to burn down leave during quiet periods, for example, you’ll want to understand the rules on forced annual leave so you don’t accidentally create a separate compliance issue while trying to solve a rostering one.

And if flexibility is driving changes to rosters or contracted hours, you should handle it carefully - reductions can trigger employment law risk if not consulted on properly. (This often overlaps with what we see in reducing staff hours scenarios.)

Key Takeaways

• So-called zero-hour contracts (in the common sense of “no guaranteed hours but expected availability”) are generally not compliant in New Zealand unless strict legal requirements are met (especially around availability and compensation).
• If you include an availability provision, you’ll generally need genuine business reasons and reasonable compensation for the employee’s commitment to remain available - and employees may be able to refuse shifts where those requirements aren’t met.
• For most small businesses, the safer approach is to build flexibility through minimum guaranteed hours, well-structured part-time arrangements, or genuine casual engagement (where the work is truly intermittent).
• What you do in practice matters just as much as what the contract says - rostering habits, cancellation practices, and manager behaviour can create legal risk.
• Variable-hours work can impact related obligations like leave, holiday pay, and consultation requirements, so your documents and processes should be aligned from day one.
• If you’re unsure whether your current setup is compliant, it’s worth getting your Employment Contract reviewed before problems arise.

If you’d like help reviewing or updating your employment arrangements (including flexible rostering, casual employment, or availability clauses), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.