Security of Payment Act Claims: What Australian Contractors Keep Getting Wrong

A subcontractor in Brisbane spends six weeks completing formwork on a commercial build. The work is done. The quality is not in question. He submits his invoice to the head contractor and waits. Fifteen business days pass. No payment schedule arrives. No payment either. He calls. The head contractor says the invoice was not a valid payment claim under the security of payment act construction rules, so they had no obligation to respond to it. He had no idea his invoice needed to say anything specific. He had no idea a missing statement could cost him every legal right the Act was designed to protect. This happens constantly across Australian construction. The Security of Payment Act claims exists to protect contractors and subcontractors from exactly this kind of situation, but the protections only work when you follow the process correctly. Most contractors do not.

What the Security of Payment Act Claims Actually Gives You?

In each Australian state and territory, there is their own version of security of payment legislation. The names may differ slightly. In New South Wales, it is the Building and Construction Industry Security of Payment Act 1999. In Queensland, it operates under the Building Industry Fairness Act 2017. In the same way, states or territories like Victoria, South Australia, Tasmania, have their different versions with different timeframes and procedures.

All of the security of payment legislation may have their own version, but their core purpose is consistent. This Act gives contractors and subcontractors a statutory right to receive progress payments for construction work performed, irrespective of what contract includes. It helps in creating a fast-paced process for disputed claims and going to the court may be avoided. It prohibits paid-when-paid clauses, which allows any head contractors to withhold payment simply because the client had not yet paid them.

The Security of Payment Act Claims covers a wide range of people, including:

• Head contractors and subcontractors performing construction work
• Suppliers of materials or plant equipment for use in construction
• Labour suppliers
• Consultants providing architectural, engineering, project management, surveying, and related services

There might be things that a particular Act does not cover, and it varies state by state. Any building contract between a builder and a homeowner may be excluded in most jurisdictions. You need to always make sure what legislation applies to what state. The key mechanism is straightforward. You serve a payment claim. If the respondent disputes the amount, they must serve a payment schedule within a strict timeframe. And if they fail to serve that, they lose the right to dispute and are liable to pay the full claimed amount. And if they succeed in paying a schedule for less than you claimed, you can apply for adjudication. An adjudicator makes a binding decision, usually within ten business days. 

It is a powerful process. The problem is that a procedurally defective claim can collapse it before it even starts.

The Most Common Errors That Invalidate Security of Payment Act Claims

Most contractors lose payment claims before adjudication ever becomes an option. The claim itself is the problem.

This Security of Payment Act Claims is strict about what a valid payment claim must contain. Any claim that does not fulfil the requirements is not a valid payment claim under the legislation. If it does not fulfil that requirement, the respondent has no obligation to respond.

Here are the errors that come up most often:

Not including the required statement

In most of the states of Australia, a payment claim should include a clear statement that it is made under the applicable security of payment legislation. This single line can make your claim valid, but in some jurisdiction, leaving it out makes the claim invalid. Meanwhile, places like New South Wales do not require this. Not knowing which rule applies can lead to avoidable and costly mistakes.

Claiming beyond the reference date

The point at which a payment claim may be submitted is known as the reference date. Usually, the contract defines it. If not, a default is imposed by legislation, usually on the final day of the month. A claim may be deemed invalid or those amounts may be eliminated if it contains work completed after that date. Unaware that they might only be able to claim until the reference date, many contractors include work up until the day they submit the claim.

Submitting outside the time limit

Each state has its own rule of a set time limit for how long after work is completed you can ask for a payment claim. For example, in Victoria, there are three months, in New South Wales and the ACT, you have 12 months. In Queensland and South Australia, there are six months. And missing these timelines cannot give you the claim. You must pursue payment through ordinary contract law, which is expensive and way slower.

Not identifying the work clearly enough

A payment claim must be detailed and specific on the basis of construction work or related goods and services to which the claim relates. A vague description causes you problems.

Head contractors missing the supporting statement requirement

A supporting statement attesting to the payment of subcontractors must be included with a head contractor’s payment claim in Queensland. If any have not, the statement must expressly mention this and provide an explanation. Although it can result in sanctions, leaving out the statement does not always render the claim unlawful. Because this regulation is unique to Queensland and is not well recognized, many contractors ignore it.

The Payment Schedule Trap Works Both Ways

Many of the contractors go along with the mentality that the Act is made to give them protection, but very few people realize that the Act also creates serious obligations for them as respondents. If you are a contractor and you receive a payment claim from a subcontractor, you need to respond with the payment schedule within the strictly required time frame. For example, in New South Wales, you get 10 days, in Queensland, you get 15 business days, and so on. If you fail to serve a payment schedule on time, you owe the full claimed amount. There will be no argument accepted as well as no negotiation accepted. The claimant can ask the amount as a court judgment debt without going through adjudication.

If a payment schedule responds with less than the claimed amount, it must clearly explain why. It needs to identify the disputed portions and state the reasons for withholding payment. A simple statement like “we dispute your claim” is not sufficient. In adjudication, the respondent is usually limited to the reasons given in the payment schedule. Any new arguments raised later may not be considered by the adjudicator.

Head contractors who receive a dubious subcontractor claim and believe it can be resolved later are frequently impacted by this. There is no later under the Security of Payment Act Claims. There are severe repercussions if the deadlines are missed.

What You Need Before You Submit a Claim

A correctly formatted invoice is not enough for the payment claim. It needs to be backed up by the documents that can withstand scrutiny if the respondent disputes the amount and the matter goes in adjudication.

Adjudicators review claims within tight timelines and highly rely on the documents that was provided by each party. If the variation claims are not confirmed by written instruction on approval orders, there is no basis to assess them. If the completed work is not supported by the site records, progress photos, or delivery documents, the claim is just a statement. Without supporting records, claims are difficult to uphold.

Before you submit a progress claim, you should have the following on file:

• Signed variation orders or written instructions from the principal or superintendent for any work outside the original contract scope
• Site diary entries or daily reports covering the period of the claim, noting work completed, workers on site, and any delays or instructions received
• Delivery dockets or goods received records for any materials included in the claim
• Progress photos timestamped to the period covered by the claim
• A copy of the contract, including any schedule of rates or contract sum breakdown the claim is drawn against
• Records of any previous payment claims and payment schedules, so the new claim clearly shows what has been paid and what remains outstanding

Contractors who are paying attention and keeping the documentation as a part of routine work submit claims that are clearer and more difficult to dispute. And even if these disputes arise, the documentation makes it easier for adjudicators to assess. But for those who try to gather records after the dispute has begun, it’s a big problem and in difficulty to recover the full amount.

It is equally important to understand the exact process for the relevant state. Timeframes and serving requirements vary. In some cases, a payment claim must be delivered in a specific way. Email may not be valid unless the contract permits it. Methods such as hand delivery, registered post, or leaving the document at the respondent’s address may be required. Using the wrong method can render a valid claim ineffective.

Getting Security of Payment Act Claims Should Not Be Complicated

The security of payment act is one of the most genuine protection for contractors and subcontractors in Australia. The process is faster with manageable cost compared to litigation and outcomes are enforceable. When it works in their favor, it works well. The real problem is that contractors get to know about this act right after the dispute has already started. They may submit a claim, but the procedural errors keep on happening because they do not know the rules. They missed the response deadlines because they did not know how short the window was. They lose their claim because of the lack of documentation.

Construction is a high-margin-pressure environment right now. The Australian Securities and Investments Commission recorded a 28 percent increase in construction insolvencies in the 2024 financial year compared to the year before. Payment delays and unpaid claims are a direct contributor to that pressure on smaller firms.

The only contractor who stays ahead of payment disputes is the one who always keeps formal legal documents. They keep the record not just as an invoice, and as a habit, not an afterthought. They stay aware of the payment scheduled time frame. And to know all of this, you do not need a lawyer on retainer. All you need to know is what the act demands and building the paperwork habit before a dispute ever starts.

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