Deed of Variation in Australia: What It Is and When to Use One

If you’ve been in business for even a short time, you’ll know that things change. Prices go up, deliverables shift, timelines move, people come and go. When the terms of an existing contract need to change, the safest way to record that change is often a Deed of Variation.

Handled well, a Deed of Variation lets you update agreed terms without tearing up the whole deal or starting again. Handled poorly, you can end up with confusion about which terms apply, disputes about consent, or even an accidental termination of the original contract.

In this guide, we’ll explain what a Deed of Variation is, when your small business should use one, how it differs from other tools (like amendment letters, novation or assignment), and the practical steps to draft and execute it properly in Australia.

What Is A Deed Of Variation?

A Deed of Variation is a formal legal document that changes one or more terms of an existing agreement. Instead of replacing the whole contract, it modifies particular clauses (for example, price, scope, milestones, renewal terms, or notice requirements).

Because it’s a deed, it generally doesn’t require consideration (payment or something of value) to be binding. This is helpful where you and the other party simply want to update terms without exchanging additional value for that change.

To be valid, a deed must satisfy specific formalities, such as being in writing, clearly intended to operate as a deed, executed correctly, and “delivered” (an act showing the parties intend to be bound). If you’d like a refresher on the basics, it can help to understand what a deed is in Australian law and how it differs from a standard agreement.

Importantly, a Deed of Variation typically states that all other terms of the original agreement remain the same. That way, you maintain continuity and avoid re-negotiating your entire contract.

When Should A Small Business Use A Deed Of Variation?

You’d consider a Deed of Variation when both sides agree to change part of an existing agreement and you want a clean, enforceable record of that change. Common scenarios include:

• Updating prices, discounts, indexation or payment terms with a customer or supplier.
• Extending or shortening contract terms or renewal periods.
• Adjusting scope of work, deliverables or service levels in a master services agreement.
• Changing milestones or performance obligations to reflect a revised project plan.
• Varying a commercial lease to alter rent, permitted use, or option periods (especially where the lease is registered and formal variation is expected).
• Amending governance or decision-making mechanics in a founder or investor agreement (for example, a Shareholders Agreement).

In each case, you want certainty. A carefully drafted deed will set out the exact clauses being changed, the new wording, when those changes take effect, and what happens to related obligations.

By contrast, if you need to replace a party (for example, transfer a contract to a new entity) or substitute the whole agreement, a variation is not the right tool. We unpack those differences below.

Deed Of Variation Vs Amendment Letter, Novation Or Assignment

It’s easy to mix up the language around changing agreements. Here’s how the main tools differ and when to use each one.

Deed Of Variation vs Amendment Letter

Both can change terms in an existing agreement. The key difference is formality and consideration.

• An amendment letter is usually a simple agreement to change a clause. To be binding, it relies on contract principles, including consideration (each party gives something of value) unless your existing contract says variations can be made without consideration.
• A Deed of Variation is executed as a deed. Because deeds don’t require consideration, they’re often preferred where the change is one-sided or there’s no obvious exchange of value for the amendment.

If your underlying contract requires variations to be “in writing and signed by both parties” and doesn’t specify a deed, an amendment letter may be enough. However, many businesses choose a Deed of Variation for extra certainty and to avoid debates about consideration.

Deed Of Variation vs Novation

Novation replaces one party or the entire agreement with a new one, with all parties’ consent. It’s a fresh contract: the new party takes on rights and obligations moving forward, and the old party is released.

Use a Deed of Novation when you need to swap one contracting party for another (for example, transferring a client contract from your sole trader to your new company) or move everyone onto a new set of terms. A variation, on the other hand, keeps the original parties and agreement in place, tweaking specific clauses only.

Deed Of Variation vs Assignment

Assignment transfers rights (usually benefits) under a contract to a third party, but generally not obligations unless the other party agrees. If you’re moving the right to receive payments or the benefit of a supply, you may need an assignment rather than a variation.

Depending on your situation, you might use a deed dealing with assignment (or a contract clause allowing assignment). For background, see how assignment of contracts works and when it’s appropriate.

How To Prepare And Execute A Deed Of Variation (Step-By-Step)

You don’t need to overhaul your contract to make a change. Follow these steps to document a variation properly and reduce your risk.

1) Check The Original Contract

Start by reviewing the variation clause in your existing agreement. Many contracts stipulate:

• How variations must be made (for example, “in writing and signed by authorised representatives”).
• Whether a deed is required or if a simple written agreement suffices.
• Any approvals or conditions precedent (for example, landlord consent, board approval, or finance approval).
• Any no-oral-modification or entire agreement clauses that could affect how changes are made.

If the contract is a lease, check whether it’s registered and whether state-based property law requires a formal deed to vary registrable terms. If the contract is a corporate governance document, make sure the proposed change is consistent with your Company Constitution or any shareholder voting thresholds.

2) Identify The Clauses To Be Varied

List the exact clauses, schedules or definitions you plan to change. Clarity is critical. If multiple provisions are interlinked, consider whether each one needs a corresponding update.

Where a clause is being replaced, it’s common to set out the new wording in full in the deed, rather than relying on a summary (“price is now $X”). This avoids later disputes about what the new clause actually says.

3) Draft The Deed Of Variation

A well-drafted Deed of Variation typically includes:

• Parties and background: identifying the original agreement (title, date, parties) and the reason for the variation.
• Definitions and interpretation: any new or modified definitions needed for the changes.
• Operative variations: clear, clause-by-clause changes (for example, “Clause 5.2 is deleted and replaced with…”).
• Commencement: when the variations take effect (immediately, on a specific date, or on an event).
• Continuity: confirming the original agreement continues in force in all other respects and prevails where relevant.
• Conflict rule: stating the deed prevails over any inconsistent term in the original agreement for the varied parts.
• Execution block: correct execution as a deed by each party.

If you need a robust template and legal support, our team can prepare a tailored Deed of Variation that fits your contract and industry.

4) Get Any Required Consents

Some variations require third-party consent. Common examples include:

• Landlord or mortgagee consent for lease variations affecting rent or term.
• Customer approvals where the change modifies regulated fees.
• Lender or investor consent where covenants restrict contract changes.

If the original contract says a particular stakeholder must approve changes, make sure to obtain that consent in writing before or at the time of executing the deed.

5) Execute The Deed Correctly

Deeds have stricter execution requirements than standard agreements. For companies, using section 127 of the Corporations Act (signed by two directors, a director and a company secretary, or a sole director/secretary) provides a streamlined path and evidentiary advantages. You can revisit the rules for signing documents under section 127 to ensure your execution block is correct.

For individuals, check witnessing requirements in your state or territory. Ensure the signatories are authorised under the original agreement (or a board resolution) to execute variations.

6) Manage Versions And Communications

After signing, circulate a consolidated version or a variation tracker so your team and counterparties know which terms apply. Update any operational documents (for example, pricing schedules, service level matrices, or project plans) and make sure your finance and operations teams are across the changes.

Common Pitfalls With Deeds Of Variation (And How To Avoid Them)

Variations seem simple, but a few traps can cause headaches later. Keep these risks in mind.

Unclear Or Incomplete Changes

Vague statements like “the parties agree the price is now $X” can collide with other clauses (indexation, discounts, milestone payments). Spell out the exact changes using precise clause references and full replacement wording where needed.

Accidental Novation Or Termination

If you change the agreement so much that it looks like a new contract, you risk an argument that the original was terminated and replaced (novation). To avoid this, keep changes targeted, confirm continuity, and avoid re-writing large swathes of the agreement unless a novation is intended.

Missing Consents

If a key stakeholder needed to approve the change, a counterparty could later claim the variation is ineffective. Identify and obtain consents upfront, and attach them to the deed if appropriate.

Execution Errors

Incorrect execution is a common reason variations fail. Make sure deeds are signed in accordance with the Corporations Act (for companies) or with correct witnessing (for individuals). If electronic signing is used, ensure your process is valid for deeds in your state or territory, and that “delivery” (intention to be bound) is clear.

Conflicts With Other Documents

Changes in one agreement can clash with other contracts or policies. For example, if you vary a services agreement’s deliverables, check your Service Level Agreement, pricing appendices and any linked statements of work. If you vary governance terms, check your constitution and Shareholders Agreement to keep everything aligned.

Employment Terms Treated Like Commercial Terms

Employment relationships are regulated and have minimum standards. If you’re changing staff terms, follow proper consultation processes and ensure you meet Fair Work obligations. For context on process and risk, see our guide to changing employment contracts. You may not use a deed here; an employment variation letter might be more appropriate.

Using A Deed Of Variation For Leases, Services And Shareholder Deals

The purpose of a Deed of Variation is similar across contexts, but there are some sector-specific tips.

Commercial Leases

Lease variations often relate to rent adjustments, option periods, permitted use, fitout contributions or market reviews. Landlords and tenants commonly formalise these via deed, particularly where the lease is registered or where lenders are involved. If you’re updating lease terms, it’s wise to review the whole document and, if needed, get a Commercial Lease Review before you vary it, so you don’t unintentionally alter key risk allocations.

Service And Supply Agreements

If your pricing model changes (for example, moving from fixed fees to consumption-based pricing), a deed can help you update charges, invoicing, service levels and termination triggers in one place. Double-check downstream documents such as statements of work, schedules and any reseller or subcontractor terms to avoid misalignment.

Founder/Investor Agreements

As your business grows, decision-making, veto rights, vesting schedules or information rights may need to evolve. Variations are common here, but they must be consistent with your constitution and any regulatory obligations. Get careful advice before changing rights that affect control, dilution or exit.

Practical Drafting Tips For A Clean Variation

A few small practices go a long way to keeping things tidy and enforceable.

• Use blackline comparisons: Attach a marked-up version of the affected clauses or the full contract showing changes, purely for reference. This helps eliminate confusion.
• Include a conflicts clause: State that the deed prevails to the extent of any inconsistency with the original agreement.
• Rename schedules if needed: If you’re replacing a schedule in full (for example, fees), say the “Schedule 1 (Fees) is deleted and replaced with the Schedule 1 attached to this deed.”
• Confirm survival: If you’re changing term or termination rights, confirm which survival clauses (confidentiality, IP, liability caps) remain unaffected.
• Be explicit about dates: If changes apply retrospectively or prospectively only, say so clearly.
• Check governing law: Keep it consistent with the original contract unless both parties intentionally change it.

What If The Change Is Bigger Than A Variation?

Sometimes, you’ll realise a variation isn’t enough. You might be selling the business, moving contracts into a group entity, or adopting a new commercial model entirely. In those cases:

• If you need to swap one party for another, consider a Deed of Novation.
• If you need to transfer rights or benefits (but not obligations) to someone else, look at an assignment approach and the original contract’s consent requirements, noting how assignment of contracts works in practice.
• If you’re dealing with multiple related documents (for example, a main agreement plus several statements of work), consider a master “amendment and restatement” or a new contract to simplify the legal position moving forward.

Not sure which path fits? That’s common. A short consultation can help you choose the option that reduces risk and admin, without overcomplicating things.

Frequently Asked Questions About Deeds Of Variation

Do All Parties Have To Sign The Deed Of Variation?

Generally yes, all parties to the original contract should sign the deed, unless the contract expressly allows one-sided variations (unusual in business-to-business deals). If a third-party consent is needed under the original contract, obtain it in writing.

Can We Use Email To Agree A Variation?

Some contracts permit variations by written agreement (for example, email) between authorised representatives. If your agreement allows this and there’s consideration, an email chain might work. But for important or one-sided changes, a deed offers stronger enforceability and clarity.

Is A Deed Of Variation Binding Without Consideration?

Yes. One advantage of using a deed is that it doesn’t require consideration to be binding, provided it’s executed and delivered properly.

Can A Deed Of Variation Change Everything In The Contract?

Technically it could, but if you’re changing most of the agreement, it may be cleaner to use a novation or a full restatement. Large-scale changes via a variation can create confusion and risk if not drafted with care.

How Does A Deed Of Variation Work With Statements Of Work?

Your master agreement might allow updates to statements of work via a change request process. If the change is material or impacts core terms (fees, liability caps, termination), a formal deed can help keep the master and all schedules aligned.

Key Takeaways

• A Deed of Variation is a formal way to change selected terms of an existing contract while keeping the rest intact, and it doesn’t require consideration to be binding.
• Use a variation for targeted updates (price, scope, milestones, lease terms). If you’re changing parties or replacing the contract, consider novation or assignment instead.
• Get the basics right: check your variation clause, identify exact clauses to change, draft precise replacement wording, and include continuity and conflict provisions.
• Execute correctly, especially for companies using section 127, and obtain any third-party consents required by the original agreement.
• Watch for common traps-unclear drafting, accidental novation, missing consents, execution errors, and conflicts with related documents-and keep everything aligned.
• If you’re varying leases, service agreements or founder documents, consider a review first to ensure the variation doesn’t trigger unintended consequences elsewhere.

If you’d like a consultation on preparing a Deed of Variation for your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.