Security of Payment | Construction.Lawyer

Cash flow is the lifeblood of every construction project. When payments are withheld, delayed or disputed, the consequences ripple through the entire contracting chain — from head contractors unable to meet payroll, to subcontractors unable to purchase materials, to suppliers facing insolvency. The Building Industry Fairness (Security of Payment) Act 2017 (Qld) — the BIF Act — exists precisely to address this endemic problem. It creates a statutory regime that overrides ordinary contractual bargaining positions and ensures every contractor and subcontractor who performs construction work or supplies related goods and services has an enforceable right to receive progress payments. This is not merely a contractual entitlement; it is a legislative guarantee backed by adjudication and enforcement mechanisms that operate independently of the courts.

At Construction.Lawyer, we regard the Security of Payment regime as one of the most powerful tools for construction payment recovery in Australia. Our dual-qualified engineer-lawyers bring a distinctive advantage — we understand not only the legislative framework but the commercial reality of construction payments because we have lived it across decades of project delivery. We know how progress claims are prepared under AS4000, AS2124, AS4902 and FIDIC; how valuations are disputed on complex infrastructure projects; and how site conditions and variation directives affect payment entitlements. We act across all Australian jurisdictions, each with its own Security of Payment legislation, and advise clients on the critical differences between them. Whether you are a subcontractor on a residential development or a tier-one contractor delivering a major transport project, the principles remain the same — you are entitled to be paid for the work you perform, and there is a statutory process designed to make that happen quickly.

The Security of Payment Process

The Security of Payment process under the BIF Act 2017 follows a prescribed sequence governed by strict timeframes that Parliament deliberately made unforgiving. A single missed deadline or procedural defect can fundamentally alter either party's legal position. We have seen claimants lose hundreds of thousands of dollars through procedural oversights, and respondents lose their entire defence because they served a Payment Schedule one day late. Understanding each step is essential.

The process begins with the reference date — the date on which a payment claim may be made. Under section 67, a reference date is either the date specified in the construction contract or, if the contract is silent, the last day of the month in which the work was carried out. A payment claim made before the reference date is invalid and cannot support adjudication. Once the reference date has occurred, the claimant serves a Payment Claim. Under section 68, it must identify the construction work, state the claimed amount, and expressly state it is made under the BIF Act. Inadequate documentation is one of the most common reasons claimants fail to recover what they seek.

The respondent has 15 business days (or the contractual period, whichever is longer) to provide a Payment Schedule under section 69. The Schedule must state the "scheduled amount" and, if less than the claimed amount, provide reasons. Critically, failure to provide a Payment Schedule in time renders the respondent deemed indebted for the full amount under section 71 — exposing them to immediate recovery in QCAT or the courts. If the claimant disputes the scheduled amount, they may lodge an Adjudication Application under section 78 within 20 business days. The nominating authority appoints an adjudicator within 4 business days, who invites an Adjudication Response within 10 business days. The adjudicator then has 10 business days to determine the matter, producing a binding determination registrable as an Adjudication Certificate with the force of a court judgment. The entire process takes approximately 60 business days — a fraction of the 12 to 24 months that court proceedings require.

Common Mistakes That Invalidate Payment Claims

Over our years of practice, we have observed the same preventable errors undermining otherwise strong payment claims. The BIF Act operates on strict compliance — technical defects that might be forgiven in ordinary commercial litigation can be fatal here. Understanding these pitfalls before serving a claim is the single most effective step a contractor can take to protect their position.

Missing or incorrect reference dates remain the most fundamental error. A payment claim served before the reference date has occurred is invalid, no matter how well-prepared the supporting documentation. This often arises where parties have contractually agreed reference dates — for example, the 25th of each month — and the claimant serves a claim early. We always verify the reference date before any claim is prepared. Failing to properly identify the construction work is another common defect. Section 68 requires the claim to identify the work to which it relates, and courts have held that vague descriptions such as "works for October" or "various items" render a claim invalid. We ensure every claim identifies work with sufficient specificity by cross-referencing progress reports, site diaries, and variation registers.

Not stating the claimed amount clearly can invalidate a claim. Ambiguity provides respondents with grounds to challenge. Failing to request payment — while seemingly obvious — is a defect we encounter regularly. The claim must constitute a request for payment, not merely a record of amounts. Including excluded amounts presents a different challenge. Under section 68, a claim cannot include amounts not payable as part of a progress payment — such as amounts already subject to a previous adjudication determination. Including these can taint the entire claim. Serving the claim on the wrong person is common on complex projects with multiple entities or novation. Finally, missing the time limit — serving the claim after the reference date window has closed — deprives the claimant of their rights for that period. We maintain rigorous diary systems to ensure no deadline is overlooked.

Payment Schedule Strategy

For respondents, the Payment Schedule is the most critical document in the entire process. It represents your sole opportunity to set out every reason why payment should be withheld or reduced, and the consequences of getting it wrong are severe. Once adjudication begins, the respondent is generally prohibited from raising new reasons not included in the Payment Schedule. An incomplete Schedule can strip a respondent of defences worth millions.

Preparing a robust Schedule begins with analysis of the scheduled amount versus claimed amount dynamic. The scheduled amount is what the respondent genuinely believes is owing — not what they would prefer to pay. Understating it without defensible reasons weakens their position in adjudication. We help determine the true scheduled amount based on proper valuation, contractual entitlements, and legitimate offsets. Reasons for withholding must be clearly articulated and supported by evidence — defective work, incomplete work, set-offs for liquidated damages, counterclaims for breach of contract, or claims under the Commercial Arbitration Act 2013 (Qld).

Set-offs and counterclaims require particular care. Not every set-off is available under the regime. The Schedule must identify each set-off with sufficient detail for the adjudicator to understand its basis. Vague references to "contra charges" without substantiation are unlikely to succeed. The most important principle is providing ALL reasons in the Schedule. We adopt a comprehensive approach — every available reason is identified and articulated, supported by documentary evidence. This ensures the respondent retains the fullest possible defence in adjudication. A Payment Schedule is not a document to be prepared hastily; it is a strategic instrument that determines the outcome of the entire dispute.

We Help Claimants Get Paid

Our approach for claimants is methodical, strategic and relentlessly focused on maximising recovery. We begin by reviewing the construction contract — whether AS4000, AS2124, AS4902, FIDIC, NEC4, or bespoke — the work performed, and payment history to identify optimal reference dates. We prepare Payment Claims that comply with the BIF Act's technical requirements and are substantiated by progress reports, site diaries, photographs, variation registers, extension of time claims and quantum meruit calculations. The quality of the Payment Claim determines the strength of every subsequent step, and we invest the time to get it right. A poorly prepared claim creates vulnerabilities; a meticulous claim commands respect.

When a respondent provides a defective Payment Schedule, we advise on the implications immediately. If the Schedule fails to comply with statutory requirements, we may argue the respondent is deemed indebted for the full amount under section 71. Where disputes arise, we prepare Adjudication Applications presenting the claimant's case persuasively, with submissions addressing every withholding reason. We also advise on Security of Payment strategy throughout the project lifecycle — training site staff on record-keeping, advising on variation timing, and ensuring contractual notices are properly served. Once a favourable determination is made, we obtain the Adjudication Certificate and enforce it through courts or QCAT, including winding-up proceedings where appropriate.

We Help Respondents Defend Claims

We act extensively for respondents — head contractors, developers, principals and government agencies — facing inflated or defective Payment Claims. Our first step is reviewing the claim for validity: was it served within time? Does it comply with section 68? Was it served on the correct entity? Is it supported by adequate evidence? Where jurisdictional defects exist, we advise on challenging validity, preparing a robust Payment Schedule, or both. The strategic question of whether to serve a Schedule at all requires careful case-by-case consideration.

When a valid claim is received, we prepare Payment Schedules that withstand adjudication scrutiny and preserve all defences — set-offs, counterclaims, and liquidated damages. If an Adjudication Application is lodged, we prepare comprehensive Responses addressing every aspect of the claimant's case, challenging unsubstantiated claims with clarity and precision. Where an adjudicator exceeds jurisdiction or commits procedural error, we conduct proceedings to set the determination aside in the Supreme Court of Queensland. Our objective is protecting respondents against unfounded claims while ensuring legitimate obligations are met.

Inter-State Security of Payment

While the Queensland BIF Act 2017 is our most frequently engaged framework, our practice extends across every Australian jurisdiction. In New South Wales, the Building and Construction Industry Security of Payment Act 1999 applies with different timeframes and residential construction treatment. In Victoria, the Building and Construction Industry Security of Payment Act 2002 has distinct procedural requirements. In Western Australia, the Construction Contracts Act 2004 includes mandatory rapid adjudication. In the Northern Territory, the Construction Contracts (Security of Payments) Act 2004 has its own specific timeframes. The Australian Capital Territory adopted a model similar to New South Wales, while South Australia operates under the Building and Construction Industry Security of Payment Act 2009.

These differences are significant — timeframes vary, requirements for valid payment claims differ, and the treatment of residential building work varies considerably between states. For contractors operating across state borders — increasingly common as major infrastructure projects engage subcontractors from multiple jurisdictions — understanding these differences is essential to protecting payment rights. A Payment Claim that is valid in Queensland may be defective in New South Wales if it fails to comply with that jurisdiction's specific requirements. Our team advises on all of these regimes and guides clients through jurisdictional complexities arising from multi-state projects. We maintain detailed comparative analyses of each regime and can advise at short notice on the correct procedure in any Australian jurisdiction.

The BIF Act — A Detailed Legislative Guide

The Building Industry Fairness (Security of Payment) Act 2017 (Qld) replaced the Subcontractors' Charges Act 1974 and introduced a modern regime designed to address power imbalances in construction contracting. Understanding its key provisions is essential for every industry participant.

Reference dates under section 67 determine when a payment claim may be made. Where contracts specify them, those dates apply; otherwise the default is the last day of the month work was performed. Supporting statements under section 68 require head contractors to declare subcontractors have been paid when claiming from principals — preventing head contractors from receiving progress payments while withholding funds downstream. Due dates for payment under section 72 require payment within 15 business days (or the contractual period, whichever is longer). The Act prohibits "pay when paid" provisions under section 76 — making payment to a subcontractor conditional on receiving payment from the principal is void, regardless of how the provision is framed. Finally, section 83 imposes a duty to pay adjudicated amounts within 5 business days of determination — failure is an offence carrying significant penalties. These provisions create a framework that prioritises timely payment with meaningful sanctions for non-compliance.

Frequently Asked Questions About Security of Payment

How long does the entire process take? From Payment Claim to enforceable Adjudication Certificate typically takes 55–65 business days — substantially faster than the 12 to 24 months for court proceedings. However, strict timeframes must be observed at every stage, and we advise clients to act promptly as even a few days' delay can cost critical rights.

Can I use the regime if my contract requires arbitration? Yes, in most cases. The BIF Act operates independently of contractual dispute resolution provisions. However, the interaction can be complex where respondents raise jurisdictional objections, and we advise on this regularly.

What if the respondent ignores my Payment Claim? If no Payment Schedule is provided within the required timeframe, the respondent becomes deemed indebted for the full amount under section 71. You can recover immediately through court proceedings or QCAT, or proceed to adjudication.

Does the regime apply to residential building work? Application varies between jurisdictions. In Queensland, the BIF Act applies to residential construction in certain circumstances with important exceptions. We can advise whether your specific dispute falls within the regime.

"We Get You Paid" — Our Security of Payment Specialist Service

Payment disputes are commercial threats that can jeopardise entire businesses. The Security of Payment regime provides a fast, cost-effective alternative to litigation, but its effectiveness depends on the quality of advice and documentation at each step. At Construction.Lawyer, our "We Get You Paid" service combines deep technical knowledge of the BIF Act and interstate counterparts with practical construction expertise only dual-qualified engineer-lawyers can offer. We understand the pressures you face — payroll, suppliers, deadlines, cash flow — and structure advice for commercially meaningful outcomes.

Every day a payment is delayed, your business carries unnecessary risk. Interest accrues, relationships deteriorate, and the window for effective action narrows. We move quickly and pursue every avenue to secure what you are owed. Our track record includes recovering millions for subcontractors, trade contractors, and suppliers who had been told they would never be paid. We have also successfully defended head contractors and developers against inflated or unsubstantiated claims, preserving their financial position and project outcomes. Whether you need to make a claim, defend one, or develop a payment strategy for an entire project portfolio, we have the expertise to deliver results.

If you are owed money for construction work, or have received a Payment Claim you believe is unjustified, contact us without delay. The timeframes are unforgiving and early advice is key. Call 1300 710 864 or visit Suite 140, 167 Eagle Street, Brisbane QLD 4000. With offices in Sydney, Melbourne, Perth and Darwin, we act across Australia. Reach our Principal, Albert Merolla JD — MCIBSE, MRICS, MAIPM, DJUR, for a confidential discussion.