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Late payments can be a frustrating and disruptive experience for any business. When a client fails to pay on time, it not only impacts your cash flow but also your ability to plan and operate efficiently. As a commercial law firm with extensive experience advising Australian businesses, we understand the challenges that unpaid invoices can create. Here’s a practical guide on what you can do when a client doesn’t pay on time — all within the framework of Australian law.

1. Review Your Contract and Payment Terms

The first step is to revisit the contract or agreement you have with your client. Clear payment terms — including due dates, payment methods, and consequences of late payment — are essential. Under Australian law, contracts should explicitly state:

• When payment is due (e.g. within 30 days of invoice date),
• What happens if payment is late (e.g. interest or late fees),
• Any rights to suspend services or reclaim goods if payment is not made.

If your contract includes these clauses, you are in a stronger position to enforce payment.

2. Send a Friendly Payment Reminder

Often, late payments are due to oversight rather than unwillingness to pay. A polite and professional reminder email or letter can be effective. Include:

• Invoice number and amount due,
• Original due date,
• A request for payment or a prompt to discuss any issues causing delay.

Keep the tone courteous to maintain the business relationship.

3. Issue a Formal Demand for Payment

If reminders don’t work, the next step is to send a formal demand letter. This letter should:

• State the outstanding amount and reference the contract,
• Give a clear deadline for payment (commonly 7-14 days),
• Warn of potential legal action if payment is not received,
• Mention any contractual right to charge interest on overdue amounts (under the Penalties Interest Rates Act 1983 or as agreed in the contract).

A demand letter signals your seriousness and may encourage prompt payment.  Having your lawyers send this this can also help to protect your relationship with the client.

4. Consider Charging Interest on Overdue Payments

Your lawyer will advise you whether you have a right at law, or under your contract, to charge interest on any unpaid amounts.

5. Explore Alternative Dispute Resolution (ADR)

Before initiating formal legal action, consider ADR methods such as mediation or negotiation. ADR can save time and costs and may help preserve a positive business relationship.

6. Take Legal Action if Necessary

If all else fails, you may need to pursue legal remedies. Options include engaging a lawyer to send a statutory demand under the Corporations Act 2001.

7. Protect Yourself Moving Forward

To reduce the risk of late payments in future:

• Conduct credit checks on new clients,
• Use clear, comprehensive contracts,
• Request deposits or progress payments,
• Set up automated invoicing and payment reminders.

Need Legal Advice?

If you’re struggling with a client who hasn’t paid on time, or if you want to ensure your contracts and payment terms protect your business, our commercial law experts can help. We offer tailored advice and practical solutions to safeguard your cash flow and enforce your rights.

Contact us today for a consultation at  or 1300 033 934.