Reference Dates Explained: The Most Misunderstood Part of Your Payment Claim

What Is a Reference Date?

The reference date is one of the most technical and most misunderstood concepts in Security of Payment Act law. Get it right and you can serve your payment claim and access all the protections of the Act. Get it wrong and your claim may be invalid — or you may serve it before you’re entitled to.

The Basic Rule

Under the SOP Act, you can only serve a payment claim on or after a reference date. The reference date marks the point at which your right to claim a progress payment arises.

How Reference Dates Work in Practice

In most states (QLD, NSW, VIC, SA), the reference date is determined by your contract. If your contract specifies that progress claims are due on the 25th of each month, the 25th is your reference date. If no date is specified in the contract, the default is the last day of each calendar month.

One Claim Per Reference Date

You can only serve one payment claim per reference date. If you have already served a claim for March 31st (or whatever your reference date is), you cannot serve another claim for the same reference date. You must wait for your next reference date.

The Practical Implication

This means you should ideally serve your payment claim on or shortly after your reference date — every month, for every month you are owed money. Don’t wait until you’re owed six months of invoices and then try to claim them all in one go. Serve a claim each month.

Reference Dates in QLD vs Other States

Queensland made some changes to reference dates under the BIF Act 2017 that differ from the position in NSW and VIC. In QLD, the reference date is expressly defined and must be strictly followed. Subcontractors in QLD should ensure their payment claim is served on or after the correct reference date for the relevant month.

The Most Common Mistake

The most common mistake is serving a payment claim before the reference date. If you serve your claim on the 20th but your reference date is the 25th, your claim may be invalid. Wait for the reference date or check your contract carefully.

PayClaim Calculates Your Reference Date Automatically

When you enter your invoice and contract details into PayClaim, our AI automatically identifies the correct reference date for your contract and state. We will never generate a payment claim for a date before your reference date. This removes one of the most technically risky parts of the SOP Act process from your plate entirely.

Owed money? You can start your Letter of Demand here — see the whole letter free, then a flat $69 to issue it. PayClaim is not a law firm; payment outcomes are not guaranteed.