Changing Employment Contracts in Australia: Employer’s Essential Guide

Employment contracts form the backbone of your working relationships as a business owner in Australia. But what happens when your business evolves and you need to update, amend, or entirely change those contracts with your employees? Managing a change of employment contract can be a tricky area for employers and a genuine worry for staff. Navigating this process correctly is crucial if you want to avoid disputes, maintain staff trust, and keep your workplace compliant with Australian law.

Whether you’re looking to adjust working hours, introduce new company policies, restructure positions, or shift your business operations, knowing how to approach a change of contract – and what to do if an employee refuses to sign – is key. In this comprehensive guide, we’ll walk you through what you need to know as an employer about contract changes, plus the practical steps and legal best practices that can help keep your business protected and running smoothly.

Keep reading and you’ll be ready to handle changes to employment contracts the right way, giving your team clarity and protecting your business at every turn.

What Is a Change of Employment Contract?

A change of employment contract (sometimes called a contract variation or contract amendment) is any modification to the terms and conditions originally agreed upon between an employer and an employee.

Common reasons for changing an employment contract can include:

• Altering job duties or position titles
• Adjusting working hours, work location or rosters
• Changing remuneration, bonuses, or benefits
• Introducing flexible working arrangements
• Updating company policies or practices
• Restructuring in response to business needs

It's important to understand that even seemingly small alterations – like reducing an employee’s hours or updating a remote work policy – can constitute a change of contract. They’re not always straightforward, and how you approach them is closely governed by both employment law and the Fair Work Act 2009 (Cth).

Why Do Employment Contracts Need To Change?

The only constant in small business is change. As your business adapts to industry trends, technology advances, or operational demands, you’ll likely find that employment contracts drafted at the outset no longer fit your real needs or those of your staff. Some of the most common situations include:

• Expanding or downsizing your team
• Responding to economic pressures or external events
• Accommodating flexible or part-time roles
• Ensuring compliance with updated modern award obligations or legal requirements
• Reflecting new benefits or workplace policies (like mental health days or work-from-home)
• Shifting to new positions, duties, or locations as the business grows

Updating contracts helps you clarify expectations, reduce the risk of disputes, and ensure that the agreement accurately reflects both your legal obligations and what your business can offer employees.

Can You Legally Change an Employment Contract in Australia?

Yes – but only with the right process and, usually, the employee’s agreement. Generally, you can’t unilaterally change core terms of an employment contract without your employee’s consent. Attempting to do so can amount to a breach of contract or even constructive dismissal, both of which could land your business in hot water.

Contract changes are best managed through consultation, clear communication, and agreement in writing. Some changes (like an update to a non-essential workplace policy) might be covered by a contractual clause giving you that flexibility – but changes to pay, role, location, or hours almost always require employee agreement.

If your proposed changes are covered by a modern award or enterprise agreement, additional requirements and consultation obligations may apply. For example, changing ordinary hours for a full-time employee must comply with the relevant award or National Employment Standards (NES). It’s also vital to ensure that any new contract terms do not undercut an employee’s minimum protections under Australian law.

How Do You Make a Change to an Employment Contract?

To help your business stay compliant and maintain good workplace relationships, follow these best practices for changing an employment contract:

1. Review the Existing Contract

Start by carefully reviewing the current contract and any attached workplace policies. Look for:

• What changes you want to make
• Any contractual rights to change terms (e.g., some flexibility clauses)
• Minimum legal entitlements that cannot be overridden

2. Consult With the Employee

Open communication is crucial. Arrange a meeting to discuss why a contract change is necessary, what’s being proposed, and how it affects the employee. Be open to feedback and questions. Collaboration now reduces the risk of disputes later.

3. Put the Changes in Writing

All contract changes should be documented. This could be either:

• An entirely new employment contract
• A written variation or amendment to specific clauses in the existing contract
• A letter specifying the agreed changes, signed by both parties

Verbal agreements are risky and very hard to enforce. Written agreements ensure everyone is clear on what’s expected.

4. Ensure Legal Compliance

Check that your proposed changes still comply with:

• The Fair Work Act 2009 and NES
• Any applicable modern award or enterprise agreement
• Discrimination, equal opportunity, and workplace safety regulations

It’s wise to get legal advice at this step to avoid accidentally breaching protections or creating an unfair contract term. For example, some changes may constitute workplace “adverse action” if not handled appropriately – which can expose you to claims under the Fair Work Act or general protections provisions.

5. Get Employee Agreement (And Address Refusals)

Employees must usually agree to any significant change to the terms of their employment. If they refuse, it’s important to understand why and whether there’s room for compromise. We cover what to do if an employee refuses to sign a new contract later in this article.

6. Confirm and Store the Updated Agreement

Once agreed, have both parties sign the new or amended contract. Keep copies securely – they’re crucial if any disagreements arise down the track.

What If an Employee Refuses To Sign a Changed Contract?

Sometimes, you might do everything right and still find that an employee won’t agree to the new terms. So, what then?

This is a common scenario and can arise for many reasons, from concern about job security to disagreement with new duties or changes in hours. Here’s what you should know:

• Employees have the right to refuse: If a proposed change is substantial (e.g. reduced pay, changed hours, different location), staff aren’t obliged to accept.
• You can’t force them to sign: Unilateral change – forcing new conditions without employee consent – is generally unlawful and can be considered a breach of contract or even constructive dismissal.
• Duty to consult: For award-covered or enterprise-agreement employees, there are often strict consultation requirements you must follow. Failing to consult properly can escalate the matter to the Fair Work Commission.

If you’ve reached an impasse, your legal options become more complex. You may need to consider redundancy (if the business structure genuinely changes), negotiating again, or, in rare instances, terminating the employee’s contract according to existing terms. Before making any moves, seek legal guidance – wrongful actions here can trigger costly unfair dismissal or adverse action claims. For a detailed guide on employee termination, visit our resource on terminating a contract.

How Can You Minimise Disputes When Changing Contracts?

Workplace change is inevitable, but disputes don’t have to be. You can reduce the likelihood of conflict and costly claims by following these practical tips:

• Consult early, explaining your business reasons directly and honestly
• Be specific about what’s changing and what will stay the same
• Document every step of the process: consultations, emails, drafts, responses
• Explain legal entitlements (like notice or redundancy pay) if changes are significant
• Consider a transition period for more complex changes
• Be open to compromise and reasonable accommodations
• Always keep changes in line with award or NES minimums

Remember: Fair and respectful processes also help with employee engagement and retention, which saves headaches in the long run.

Are There Legal Risks With Changing a Contract?

Yes – mishandling contract changes is a frequent cause of legal trouble for Australian businesses. Risks include:

• Breach of contract: Changing terms without agreement or authority
• Claims of constructive dismissal: Forcing change so major that the employee feels compelled to resign
• Adverse action claims: For changes perceived as discrimination or punitive
• Breach of award, NES, or other legal protections
• Unfair dismissal: If an employee is terminated due to disagreement over a change

This is why we recommend always consulting with experienced employment lawyers when considering changes to contracts, particularly for significant or large-scale amendments.

What Legal Documents Should You Use for a Change of Employment Contract?

Getting the paperwork right is essential for protecting your business and avoiding ambiguity. The following legal documents are commonly used in the contract change process:

• Contract Variation/Amendment Agreement: A simple document signed by both parties, specifically outlining the changes from the original contract.
• New Employment Contract: Used if changes are extensive or you need to consolidate several amendments into a single, up-to-date agreement. An expert can help you draft a comprehensive employment contract.
• Policies and Handbooks: If you’re updating workplace rules or practices (like workplace policies), new versions must be circulated and signed off by staff.
• Consultation and Agreement Records: Keep records of all discussions, proposals, and acceptance documents.

Not sure what specific documents you’ll need? Our guide on employment contract templates and key legal documents for business can help, or you can get tailored advice from our team.

Frequently Asked Questions About Contract Changes

What if the Change Is Covered by a Flexibility or Variation Clause?

Some employment contracts include "flexibility" or "variation" clauses that allow the employer to make certain changes without needing new written agreement each time. However, these clauses can’t override minimum protections under the Fair Work Act, modern awards, or NES. They must be reasonable and not used to unfairly disadvantage the employee.

Can I Change an Award or Enterprise Agreement Term?

You cannot change terms set out by modern awards or enterprise agreements simply by agreement with an individual employee. Modifications to these require formal variation processes, consultation with affected employees, and (often) approval by the Fair Work Commission.

How Should I Respond If Asked ‘How to Refuse to Sign a Contract’?

If an employee asks you how to refuse, it’s often a sign that more consultation is needed. Be open with your reasoning, address their concerns, and try to reach consensus. Ultimately, if agreement can’t be achieved, consider next steps carefully – such as redeployment, redundancy, or (in rare cases) termination in accordance with the original contract and fair dismissal processes.

Key Takeaways

• Changing an employment contract in Australia requires proper process, employee consultation, and written documentation.
• You usually cannot change core contract terms without employee agreement – get written consent for any significant amendments.
• Verbal or informal agreement isn’t enough; ensure all contract changes are in writing and signed by both parties.
• Always check your changes comply with the Fair Work Act, relevant awards or enterprise agreements, and minimum employee standards.
• If an employee refuses to sign a new contract, you may need to seek further consultation or legal advice before taking next steps.
• Wrongly handled contract changes could expose your business to breach of contract, unfair dismissal, or adverse action claims.
• Using the right legal documents and processes minimises risk and supports a fair, compliant workplace.

If you’d like a consultation on managing a change of employment contract or need help drafting or reviewing new employee contracts, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.