Set-Off as a Defence to a Debt Claim in Victoria: Equitable, Legal and Contractual Set-Off 

Can a business use set-off to defend a debt claim in Victoria? 

A business facing recovery proceedings may rely on a set-off defence to a debt claim in Victoria where it has a genuine cross-demand against the creditor. Depending on the source and character of that cross-demand, equitable set-off, legal (statutory) set-off or contractual set-off may reduce the amount payable or defeat the creditor’s claim altogether. 

For Victorian business owners and directors, the critical issue is not simply whether the company has another claim against the creditor. The claims must satisfy the requirements of the form of set-off. Equitable set-off requires a closely connected cross-claim that makes it unjust to enforce the debt without accounting for the cross-demand. Legal set-off turns on mutual claims of the required character, while contractual set-off depends on the language and operation of the parties’ agreement. 

The position can change materially where the contract contains “no set-off” clauses, payment provisions or contractual restrictions on deductions. This article examines the three forms of set-off, the degree of connection each requires, and the evidence and pleadings relevant to reducing or defeating a debt in Victorian commercial litigation. 

What is the Legal Framework for Using Set-Off Against a Debt Claim in Victoria? 

In ordinary Victorian debt proceedings, a set-off defence to a debt claim in Victoria is governed by legal and equitable principles, the parties’ contract, and the applicable court rules. Sections 61 to 64 of the Civil Procedure Act 2010 (Vic) regulate summary judgment applications. Rule 13.14 of the Supreme Court (General Civil Procedure) Rules 2025 expressly permits a defendant’s claim for a debt or damages to be relied on as a defence and set off against the plaintiff’s monetary claim, whether the defendant also counterclaims. If both parties succeed, r 10.09 permits judgment for the resulting balance. 

Legal (statutory) set-off traditionally applies to mutual monetary cross-demands between the same parties acting in the same capacities. It does not depend on both claims arising from the same transaction. Its availability instead turns on mutuality and whether the cross-demands have the character and maturity required to be set against one another. It operates defensively up to the value of the creditor’s claim. Any excess requires a counterclaim. 

Equitable set-off can accommodate claims that do not satisfy the requirements of legal set-off, but it demands a much closer relationship between the competing claims. In Roadshow Entertainment Pty Ltd v (ACN 053 006 269) Pty Ltd (1997) 42 NSWLR 462, the Court explained that the cross-claim must be sufficiently connected with the creditor’s demand that it would be unjust to enforce that demand without taking the cross-claim into account. Gilsan (International) Ltd v Optus Networks Pty Ltd [2004] NSWCA 51 confirmed that a general commercial relationship is insufficient. The connection must make it unconscientious for the creditor to insist on payment without recognising the cross-demand. 

Contractual set-off depends primarily on the construction of the agreement. A clause may extend set-off across contracts, future liabilities, or disputed amounts. Conversely, “no set-off” clauses may require payment in full despite a cross-claim. The precise wording matters because excluding deduction from an invoice is not necessarily the same as extinguishing a separate counterclaim. 

Where the creditor uses a corporate statutory demand rather than an ordinary debt proceeding, sections 459G and 459H of the Corporations Act 2001 (Cth) apply. Section 459H(5) defines an “offsetting claim” more broadly than an equitable set-off defence, so the two should not be treated as interchangeable. 

How Do Victorian Courts Decide Whether Set-Off Can Reduce or Defeat a Debt Claim? 

Are the competing claims mutual and capable of being set against each other? 

The court first identifies the legal parties to each obligation and the capacities in which they act. For legal (statutory) set-off, the debt and cross-demand ordinarily must be mutual. A claim owed to a director personally cannot usually be set against a debt owed by the company, nor can obligations involving different members of a corporate group be treated as interchangeable. The court also considers whether each demand is monetary, sufficiently ascertainable, and enforceable. Legal set-off does not require the claims to arise from the same transaction, but the absence of mutuality can be decisive. 

Is the cross-claim closely connected enough for an equitable set-off? 

For equitable set-off, mutual monetary demands are not sufficient. The court examines whether there is a closely connected cross-claim that directly impeaches the creditor’s demand. Relevant matters include whether both claims arise from the same contract, whether the creditor’s alleged breach impaired the performance for which payment is sought, and whether the resulting loss is integral to the payment dispute. A shared commercial background is not enough. The connection must be such that enforcing the debt without accounting for the cross-claim would be unjust. 

What effect does the contract and “no set-off” clauses have? 

For contractual set-off, the court begins with the agreement’s text, read in its commercial context. It asks which liabilities are covered, whether disputed or future amounts may be deducted, whether set-off can occur across separate contracts, and whether notice or certification is required. “No set-off” clauses may require payment in full before the debtor pursues its cross-claim separately. Their reach depends on precise drafting. A clause excluding deductions from payments does not automatically eliminate the underlying cause of action or prevent a properly pleaded counterclaim. 

What evidence must support the set-off defence? 

A defendant must do more than assert that the creditor also owes it money. Courts expect the defence to identify the legal basis of the cross-claim, the contractual obligations breached, the amount claimed, and the method of calculation. Useful evidence commonly includes executed contracts, variations, invoices, payment records, contemporaneous complaints, defect reports, expert assessments, and correspondence linking the creditor’s conduct to the alleged loss. For equitable set-off, the evidence must also demonstrate the required connection and why separate enforcement would produce injustice. 

Can a set-off defence prevent summary judgment? 

Under sections 61 to 64 of the Civil Procedure Act 2010 (Vic), a creditor may seek summary judgment by arguing that the defence has no real prospect of success. A properly particularised and supported set-off may establish a genuine issue requiring trial, including where it is capable of reducing or defeating a debt. The court will not usually determine contested evidence conclusively at that stage, but it will test whether the defence has substance. Speculative loss estimates, unrelated grievances, or unsupported assertions are unlikely to prevent judgment. 

When Do Set-Off Disputes Commonly Arise in Victorian Debt Claims? 

Set-off disputes commonly arise when a creditor treats an unpaid invoice as a straightforward debt, while the debtor says the same commercial relationship has generated a countervailing loss. The practical issue is not simply whether both parties have complaints. It is whether the cross-demand satisfies the requirements for legal, equitable or contractual set-off and can be proved with sufficient precision. 

In supply and professional services disputes, a creditor may claim unpaid fees while the customer alleges defective goods, negligent advice, delay, or failure to deliver the agreed scope. The debtor may seek reducing or defeating a debt by deducting its loss from the invoices. Whether that position is sustainable depends on mutuality, the connection between the claims and any contractual procedure for notifying disputes or withholding payment. 

Project disputes often involve claims for unpaid milestones or variations met by defective, incomplete, or delayed work. Where the agreement has been terminated, the parties may also disagree about accrued payment rights, damages and payment claims following contract termination. A global estimate of rectification costs will rarely provide the same evidentiary value as a properly particularised schedule supported by contemporaneous records and, where necessary, expert evidence. 

Post-completion business sale disputes present similar issues. A seller may pursue deferred consideration or an amount due under completion accounts, while the buyer relies on breach of warranty, misleading disclosure, or an indemnity claim. The availability of set-off will turn on the wording of the sale agreement, including claim-notification provisions, liability limitations, and any “no set-off” clause. These issues often arise in share sale agreement disputes. 

Complications also arise where different companies within a corporate group issued invoices, performed work, or sustained the alleged loss. Claims involving trustees, guarantors, or directors require the same attention to legal capacity. Commercial connection alone will not establish the mutuality required for legal (statutory) set-off. 

Finally, the chosen recovery procedure can alter the analysis. An ordinary debt proceeding, summary judgment application and corporate statutory demand engage different tests. Before escalating a claim or withholding payment, parties should identify the correct legal basis, quantify the net position, and assess whether the available evidence supports the procedural response proposed. That assessment should occur before commercial correspondence hardens into admissions, inconsistent positions or procedural steps that are difficult and costly to reverse later in litigation. 

What Should a Business Assess Before Relying on or Resisting a Set-Off Defence? 

Before pleading a set-off defence to a debt claim in Victoria, determine whether the asserted claim is truly a set-off, a denial that the debt is payable, or a separate counterclaim. The distinction affects pleadings, evidence, and exposure to summary judgment. The parties’ identities and capacities must also be confirmed, particularly where corporate groups, trusts, guarantors, or related contracts are involved. The agreement should be reviewed for payment conditions, notice requirements, dispute procedures and “no set-off” clauses before any amount is withheld. 

The evidentiary task is to establish both liability and value. Relevant material commonly includes executed contracts, variations, invoices, account ledgers, contemporaneous complaints, defect notices, expert reports, and evidence of loss. A structured schedule should identify each component of the cross-demand, its legal basis, its connection with the creditor’s claim, and the document supporting the amount claimed. For equitable set-off, the evidence must establish a closely connected cross-claim, not merely an unresolved grievance arising from the wider commercial relationship. 

Quantification should be approached conservatively. Principal amounts, GST, contractual interest, credits, mitigation, and any overlap between loss categories should be tested before proceedings. An inflated or poorly particularised cross-claim may weaken an otherwise arguable defence. If the cross-demand exceeds the debt, a counterclaim may be required to recover the balance. 

Strategy should account for more than the prospect of reducing or defeating a debt. Parties should assess accruing interest, litigation costs, termination rights, solvency implications, and the commercial value of an early resolution. Creditors should test the substance of any asserted set-off before seeking summary judgment or issuing a statutory demand. Debtors should avoid withholding payment unless the contractual and legal basis has been properly examined. 

Frequently Asked Questions 

How Should a Business Respond to a Debt Claim When It Has a Cross-Claim? 

A set-off can materially change a business’s exposure to a debt claim, but its availability depends on the nature of the cross-demand, the parties’ capacities, the contract, and the supporting evidence. Whether relying on equitable set-off, legal (statutory) set-off or contractual set-off, the claim should be classified and quantified before payment is withheld, or proceedings are defended. 

Early advice can identify whether the cross-demand supports reducing or defeating a debt, requires a separate counterclaim or is restricted by a “no set-off” clause. If your business is pursuing or defending a commercial debt, visit our debt recovery lawyers page or book a consultation to discuss the available strategy. 

This article is general information only and not legal advice. For advice specific to your circumstances, please contact our team.