Statute of Limitations on Debt in Australia: Essential Business Guide

Chasing unpaid invoices is a reality for many Australian businesses. But there’s a critical question to answer early: how long do you have to take legal action before a debt becomes unenforceable?

Understanding the statute of limitations on debt in Australia helps you act at the right time, protect your position, and avoid costly mistakes. In this guide, we’ll explain how limitation periods work, where the rules differ between states, what resets the clock, and the practical steps you can take now to reduce risk.

Whether you’re a startup or a growing company, getting across these timeframes will give you the confidence to manage cash flow and escalate matters appropriately.

What Is the Statute of Limitations on Debt?

The “statute of limitations” is the legal deadline for starting court proceedings. In a debt context, it’s the window in which you can sue to recover money owed. Once the limitation period expires, the debt is generally “statute-barred”. That means the debtor can defend a claim simply by saying it’s out of time, and the court won’t enforce payment.

Limitation periods are set by each state and territory. For most business debts based on simple contracts (for example, unpaid invoices, credit accounts or loans documented in a standard agreement), the period is six years from when the cause of action accrues-that’s usually when payment became due and wasn’t made.

Different time limits apply to other types of claims. Debts owed under deeds or mortgages, and the enforcement of court judgments, often have longer periods. Government and tax debts also sit under separate regimes and don’t follow the usual contract rules.

If your claim arises from a breach of contract, the limitation period is one of the first issues to assess, because it can determine your options from the outset.

How Long Do You Have to Recover a Debt (By State)?

Here’s a high-level overview of typical limitation periods for business debts across Australia. Always check the legislation that applies to your state or territory and the type of claim you’re bringing.

New South Wales (NSW)

• Simple contracts (most commercial debts): 6 years from when the debt became due (Limitation Act 1969 (NSW)).
• Debts under a deed or mortgage: commonly up to 12 years (periods differ depending on the nature of the obligation).
• Court judgments: commonly up to 12 years to commence enforcement proceedings.

Victoria (VIC)

• Simple contracts: 6 years from accrual (Limitation of Actions Act 1958 (VIC)).
• Debts under a deed and most court judgments: up to 15 years.

Queensland (QLD)

• Simple contracts: 6 years (Limitation of Actions Act 1974 (QLD)).
• Court judgments: typically 6 years to start enforcement (different to NSW/VIC).
• Certain mortgage and deed actions: often longer than 6 years, depending on the claim.

Northern Territory (NT)

• Simple contracts: 3 years (Limitation Act 1981 (NT)). This is a notable departure from the 6-year norm elsewhere.
• Other claims (e.g. deeds, judgments): longer periods may apply.

Western Australia (WA), South Australia (SA), Tasmania (TAS) and the ACT

• Simple contracts: generally 6 years.
• Deeds, mortgages and judgments: longer periods can apply (commonly 12 years in some jurisdictions, but check local rules).

Why does this matter? If you’re operating across borders (for example, supplying nationally), the governing law in your contract and the relevant court’s jurisdiction can affect which limitation period applies. It’s worth ensuring your Terms of Trade or Customer Contract clearly set a governing law and jurisdiction to reduce uncertainty.

What Types of Debts Are We Talking About?

Most day-to-day business debts fall into “simple contract” claims: unpaid invoices for goods or services, credit accounts, trade debts and standard loans. Beyond that:

• Debts under deeds or mortgages can carry longer limitation periods (commonly 12 years, and up to 15 years in VIC).
• Enforcing court judgments has its own timeframe (often 6, 12 or 15 years, depending on the state).
• Tax and many government debts follow separate statutory regimes.

If you’re unsure which category a particular debt sits in, get advice early. The wrong assumption can cost you your ability to recover.

When Does the Clock Start-and Can It Restart?

In most cases, time starts running when the payment is due and not made (the cause of action “accrues”). If your payment terms say “30 days from invoice”, the limitation period typically starts the day after day 30 if the invoice isn’t paid.

Part-Payments and Acknowledgements

In many jurisdictions, the limitation period can restart in two common situations:

• A part-payment is made toward the debt; or
• The debtor acknowledges the debt in writing.

There are important technicalities here. Most states require a written and signed acknowledgement by the debtor (or their authorised agent) for it to be effective. While electronic communication can work, make sure the acknowledgement is clear, in writing, and attributable to the debtor-ideally signed (including an accepted form of electronic signature) to avoid arguments later.

Be careful with informal emails. A casual note like “we’ll sort it soon” may not be enough. Keep clean records of any acknowledgement or part-payment, and diarise the new date from which the limitation period runs.

New Payment Plans and Variations

Agreeing a new repayment plan (for example, a revised schedule) can sometimes amount to a fresh contract, which may affect the accrual date and limitation period. If you formalise a deal, consider using a Deed of Settlement so the terms are clear and you preserve enforcement options.

What Does Not Reset the Clock?

Sending invoices or reminders by themselves doesn’t restart time. The trigger must be a valid part-payment or a legally effective acknowledgement. If you think the limitation period is approaching, don’t rely on back-and-forth emails-lock in a proper written acknowledgement or seek advice about immediate next steps.

What Happens When a Debt Becomes Statute-Barred?

Once the limitation period expires, the claim is usually statute-barred. Practically, that means:

• You can’t commence court proceedings to enforce the debt.
• The debtor can raise the expired limitation period as a complete defence.
• Continuing to pressure the debtor as if you can sue may risk breaching debt collection and consumer protection rules (for example, under the Australian Consumer Law).

The debt doesn’t magically vanish-it may still exist as a moral or commercial obligation-but you can’t use the courts to compel payment. If a debtor chooses to pay voluntarily, that’s their choice, but you must not misrepresent your legal rights.

If you’re unsure whether a debt is out of time, pause and get advice before sending demands. It’s important to keep your business compliant and protect your reputation.

Special Categories: Deeds, Mortgages, Judgments and Government Debts

As noted earlier, longer limitation periods commonly apply to deeds, mortgages and enforcement of court judgments. The exact timeframe depends on the state or territory. For example, VIC allows up to 15 years for deeds and judgment enforcement, while QLD typically applies 6 years to enforce judgments. Tax and many government debts fall under separate legislation with their own collection and enforcement rules.

If you’re dealing with these categories-or a cross-border matter-get tailored guidance so you don’t misapply a six-year rule where it doesn’t belong.

Practical Steps To Protect Your Cash Flow

You can dramatically reduce limitation risks by tightening your documentation, processes and timelines. Here are the key areas to focus on.

1) Set Clear Payment Terms Upfront

Your contracts and invoices should make payment triggers and deadlines crystal clear. Strong, plain-English terms also give you better leverage if you need to escalate. If you sell to other businesses, consider putting robust credit terms in place from day one using Credit Application Terms and a tailored Customer Contract.

Where you sell goods or services on standard terms, ensure your Terms of Trade cover late fees, interest (where lawful), suspension rights, security interests and recovery costs. This helps you act quickly and consistently if an account falls overdue.

2) Use Security Wherever Sensible

For higher-risk accounts, look at security to improve your priority if things go wrong. Depending on your business model, that might include a General Security Agreement over the debtor’s assets and using the Personal Property Securities Register (PPSR) to register a security interest. Proper registrations can strengthen your position if a customer becomes insolvent.

If you’re unfamiliar with the PPSR framework and how it protects suppliers and financiers, our guide to the PPSR is a helpful starting point.

3) Act Early on Overdue Accounts

Don’t wait. Implement a timetable for reminders (email and phone), then escalate to a formal letter of demand if needed. Diarise your limitation dates as soon as an invoice is overdue, and build in enough time for any required pre-action steps (some courts require a pre-action process).

If the debtor engages, consider documenting any repayment plan in a signed agreement or a Deed of Settlement. This can reset the limitation period and reduce ambiguity about what’s owed and when.

4) Keep Excellent Records

Maintain copies of contracts, invoices, delivery evidence, statements, emails, payment histories and any acknowledgements. If you ever need to prove when a debt became due or that it was acknowledged, contemporaneous records are your best friend.

5) Choose the Right Enforcement Path

If negotiation stalls and time is getting tight, get advice on your options. In some matters, sending a carefully framed letter of demand or commencing proceedings before the limitation period expires is the right move. In others, mediation or a commercial workout delivers a better outcome. The key is to make the decision early, with a clear understanding of your limitation deadline.

6) Build a Repeatable Collections Policy

Consistency pays. A written collections policy helps your team follow the same steps every time, so debts don’t age unnecessarily. It also supports ethical, compliant collection practices so you stay on the right side of consumer law and industry guidelines.

Common Pitfalls to Avoid

• Letting debts drift until they’re close to or beyond the limitation deadline.
• Relying on vague emails as “acknowledgements” (they may not reset time).
• Assuming all debts have a six-year period-NT simple contract claims are three years, and judgment enforcement periods vary by state.
• Misrepresenting your enforcement rights after a debt is statute-barred.

When to Get Help

If the debt is significant, disputed, cross-border, secured, connected to a judgment or approaching its limitation deadline, it’s worth speaking with a lawyer promptly. Getting the documents and strategy right can make the difference between recovery and write-off.

Key Takeaways

• For most business debts based on simple contracts, the limitation period to sue is 6 years from when the debt became due, but there are key state differences-NT is 3 years for simple contracts, VIC allows up to 15 years for deeds and judgment enforcement, and QLD judgment enforcement is typically 6 years.
• The clock usually starts when payment is due and unpaid. It can restart if the debtor part-pays or provides a written, signed acknowledgement-so keep clear, attributable records.
• Once a debt is statute-barred, you generally can’t enforce it through the courts, and misrepresenting your rights can create compliance risks.
• Protect your position with clear payment terms, appropriate security (including PPSR registrations), early escalation and strong record-keeping, backed by a repeatable collections policy.
• Use practical tools like a tailored Customer Contract, Terms of Trade, Credit Application Terms and, where needed, a Deed of Settlement to reduce disputes and preserve your rights.
• If a claim is complex or nearing the deadline, get advice early so you can choose the best enforcement or resolution pathway before time runs out.

If you’d like a free, no-obligations chat about limitation periods, debt recovery strategy or strengthening your contract suite, you can reach us on 1800 730 617 or team@sprintlaw.com.au.