Can An Employer Change A Roster Without Notice In NZ?

Can an employer change a roster without notice in NZ? Sometimes, but you need to be careful.

If your employment agreement gives you flexibility, the change is reasonable, and you follow any notice or consultation requirements, you may be able to adjust shifts. But if the change cuts agreed hours, ignores a roster clause, cancels a shift at the last minute, or requires extra availability that was never agreed, it can quickly become a legal problem.

The good news is that roster changes don't have to be complicated. With the right contract wording and a simple process, you can stay flexible while reducing the risk of disputes about hours, pay, availability, commission arrangements or unfair treatment.

Can An Employer Change A Roster Without Notice In NZ?

It depends on what the employment agreement says, how big the change is, and whether the change affects the employee's agreed hours or pay.

New Zealand employment law doesn't set one standard notice period for every roster change. Instead, your starting point is the employee's employment agreement, any workplace policy, any commission plan that affects pay, and your good faith obligations under the Employment Relations Act 2000.

As a practical rule, you should avoid changing a roster without notice unless:

• the employment agreement clearly allows roster changes on short notice;
• the change doesn't reduce guaranteed hours or pay;
• the employee isn't being required to work outside their agreed availability without a valid availability clause;
• you've acted fairly and communicated the reason for the change; and
• you've complied with any shift cancellation clause if a shift is being cancelled.

A small change, such as moving a start time by 30 minutes next week where the agreement allows it, is very different from removing two full shifts tomorrow. The more the change affects income, family arrangements, transport, childcare or health and safety, the more notice and consultation you'll usually need.

If you make sudden changes often, employees may argue that you're not acting in good faith or that you're changing their employment terms without agreement. That can create avoidable grievances, even if the change made commercial sense for your business.

What Should Your Employment Agreement Say About Rosters?

Your employment agreement should clearly explain how hours and rosters work, because it's much harder to rely on flexibility that isn't written down.

Under the Employment Relations Act 2000, every employee must have a written employment agreement. For rostered employees, that agreement should deal with the usual working arrangements and any flexibility you need.

Roster Clause Outline

If you're preparing or reviewing an employment agreement, a roster clause will usually need to cover the points below. This is only an outline, not a finished clause. Have a lawyer or legal team tailor it before you use it.

1. Role And Work Pattern: State whether the employee works fixed hours, variable hours, shifts, or a rotating roster.
2. Guaranteed Hours: Set out the minimum hours you guarantee each week, fortnight or roster cycle, if any.
3. Usual Days And Times: Describe the ordinary days, start times, finish times or roster cycle where these are known.
4. Roster Notice: Say how much notice you'll normally give before publishing or changing a roster.
5. Reasonable Changes: Explain when you may change shifts, such as customer demand, staff absence, events or operational needs.
6. Availability: If you need the employee to be available outside guaranteed hours, include a valid availability provision and compensation where required.
7. Shift Cancellation: Include a reasonable cancellation notice period and what compensation applies if you don't give that notice.
8. Breaks And Rest: Refer to meal and rest breaks, and make sure the roster supports those entitlements.
9. Consultation: Set out how you'll discuss significant or ongoing roster changes with the employee.

Templates often miss the details that matter most for your workplace. For example, a cafe, a cleaning business and a medical practice may all need different roster wording because their customer demand, staffing risks and notice periods are different.

Can You Change An Employee's Hours In NZ?

You can usually change an employee's hours only if the employment agreement allows it or the employee agrees to the change.

This is where many roster disputes start. A roster change might look operational to you, but legally it may also be a change to the employee's agreed hours. If an employee is guaranteed 30 hours per week, you generally can't simply roster them for 22 hours because trade is quiet.

Before changing hours, check whether the agreement includes:

• minimum or guaranteed hours, such as 30 hours per week;
• fixed days or times, such as Monday to Friday, 9am to 3pm;
• a roster cycle, such as shifts set fortnightly;
• a flexibility clause, allowing reasonable changes to days or times; and
• a variation process, such as changes needing to be in writing.

If you want to make an ongoing change to agreed hours, treat it as a contract variation. That means you should explain the business reason, consult with the employee, give them a fair chance to consider the change, and record any agreed change in writing.

You should also avoid changing rosters in a way that appears to punish an employee for raising concerns, refusing extra work they don't have to accept, or being unavailable for personal reasons outside their agreed availability. That can create a disadvantage risk under the Employment Relations Act 2000.

How Much Notice Do You Need To Give For Shift Changes?

There isn't one fixed notice period for all shift changes in NZ, so you need to give the notice required by the employment agreement or, if it doesn't say, reasonable notice in the circumstances.

For ordinary roster changes, what is reasonable depends on the role and the impact of the change. A few hours' notice may be acceptable for a genuine emergency if the employee agrees. For planned changes, many businesses use a set period such as 7 days or 14 days, but the right period depends on your operations and what you've promised in the agreement.

Shift cancellation is more specific. If your employee does shift work, the employment agreement should state:

• the reasonable notice period you must give to cancel a shift; and
• the reasonable compensation payable if you cancel without giving that notice.

If the agreement doesn't include a valid shift cancellation provision and you cancel the shift anyway, you must pay the employee what they would have earned if they had worked the shift. This can be a costly surprise if your rosters change frequently.

Example: Cancelling A Cafe Shift

Say Priya runs a cafe in Wellington. Her employee, Sam, is guaranteed 25 hours per week. Sam is rostered for a 6 hour Saturday shift from 8am to 2pm.

Priya's agreement says shifts can be cancelled with at least 24 hours' notice. If less than 24 hours' notice is given, Sam receives compensation equal to 3 hours' pay.

On Friday night, Priya realises bad weather will reduce bookings and cancels Sam's Saturday shift at 8pm. That's only 12 hours' notice, so Priya needs to pay the 3 hours' compensation set out in the agreement. She also needs to make sure Sam still receives any guaranteed weekly hours, unless Sam agrees otherwise.

If Priya's agreement had no valid cancellation clause, Priya would need to pay Sam for the full 6 hours he would have worked.

How Do Availability Clauses Affect Roster Changes?

If you require an employee to be available for extra or variable hours, you may need a valid availability clause.

New Zealand law restricts what are often called zero hour arrangements. If an employee has guaranteed hours but you're also asking them to be available for more work, the availability requirement must be handled properly.

An availability provision generally needs:

• guaranteed hours of work;
• genuine reasons based on reasonable grounds for needing the employee to be available;
• reasonable compensation for that availability, unless the employee's salary genuinely covers it and the agreement says so; and
• clear wording about when the employee may be asked to work additional hours.

If you don't have a valid availability clause, an employee may be able to refuse work outside their guaranteed hours. You also shouldn't disadvantage them for refusing those extra hours.

For example, if your retail store guarantees an employee 20 hours per week but regularly expects them to keep three other days free just in case the roster changes, you should review your agreement. That expectation might be an availability requirement, not just normal flexibility.

Availability clauses are easy to get wrong because the wording needs to match the real business need. If you use them, make sure they aren't just copied from another business that operates differently.

What Process Should You Follow Before Changing A Roster?

You should follow a clear, documented process before changing a roster, especially where the change affects income, childcare, transport or regular working patterns.

A practical process helps you comply with good faith obligations under the Employment Relations Act 2000 and shows that the change was business based, not arbitrary.

Roster Change Checklist

1. Check The Employment Agreement: Look for guaranteed hours, roster notice, cancellation wording, availability clauses and any consultation requirements.
2. Identify The Type Of Change: Is it a one off shift swap, a cancellation, a reduction in hours, or a permanent change to the working pattern?
3. Work Out The Business Reason: Record the practical reason, such as staff illness, customer demand, a booking change or a new operating model.
4. Check Pay Impacts: Confirm whether the change affects guaranteed hours, overtime, allowances, public holiday pay or other entitlements.
5. Give Notice: Follow the agreement. If the agreement is silent, give as much notice as reasonably possible.
6. Consult Where Needed: For significant or ongoing changes, explain the proposal, listen to feedback and consider alternatives.
7. Confirm In Writing: Send the updated roster and note any agreed changes to hours or availability.
8. Keep Records: Keep copies of rosters, messages, consultation notes and any agreement to vary hours.

Also think about the Holidays Act 2003. Roster patterns can affect calculations such as relevant daily pay, average daily pay and whether a day is an otherwise working day for public holiday purposes. Last minute roster changes around public holidays can attract close scrutiny if they appear designed to avoid paying entitlements.

If something has already gone wrong, pause further changes if you can, gather the employment agreement and roster records, and get advice before responding in writing. A calm, well documented response is usually much easier to manage than a rushed explanation sent in frustration.

Common Mistakes To Avoid When Changing Rosters

The biggest mistake is treating the roster as separate from the employment agreement. In practice, your roster is often the place where your contract obligations show up week by week.

Watch out for these common issues:

• Reducing Guaranteed Hours: If you promised minimum hours, don't roster below them unless the employee genuinely agrees or the agreement clearly allows it.
• Relying On A Vague Flexibility Clause: A broad clause saying hours may change may not be enough for major or repeated changes.
• Forgetting Shift Cancellation Rules: If you cancel shifts without the required notice or compensation, you may still owe pay.
• Using Availability Without Compensation: If employees must keep time free for possible shifts, check whether you need a valid availability clause.
• Changing Rosters To Avoid Leave Or Public Holiday Costs: This can create Holidays Act and good faith problems.
• Not Keeping Written Records: If there's a disagreement later, clear rosters, messages and signed variations can make a big difference.

If your business relies on fast roster changes, it's worth building that flexibility into your employment contracts, contractor agreements and policies from day one. That way, your managers aren't trying to solve every roster issue under pressure after the problem has already landed.

Key Takeaways

• You can change a roster without notice only in limited situations, and the employment agreement is your starting point.
• You generally can't reduce guaranteed hours or make permanent changes to agreed hours without a proper contract basis or employee agreement.
• Shift cancellation rules matter. Your agreement should include a reasonable cancellation notice period and compensation if you don't give that notice.
• If your agreement doesn't have a valid shift cancellation provision and you cancel the shift anyway, you must pay what the employee would have earned for that shift.
• If you require employees to be available beyond guaranteed hours, you may need a valid availability clause with genuine reasons and reasonable compensation.
• A simple process of checking the agreement, giving notice, consulting where needed and confirming changes in writing can prevent many roster disputes.

If you'd like help with your employment agreements, roster clauses, availability provisions or shift cancellation wording, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.