Adjudication Responses

Responding to an Adjudication Application: The Stakes Are Immediate

Receiving an adjudication application is one of the most time-critical events in construction law. Under the Building Industry Fairness (Security of Payment) Act 2017 (Qld) (the BIF Act), the response window is short, the determination is interim binding, and an adverse outcome creates an obligation to pay the adjudicated amount within five business days, enforceable as a judgment debt through the courts. A head contractor, developer, or principal who treats an adjudication application casually risks paying amounts that are inflated, unsubstantiated, or simply not owed. At Construction.Lawyer, our dual-qualified engineer-lawyers act extensively for respondents, dismantling unmeritorious claims and protecting our clients' positions with technical and legal authority.

The response stage is where most respondent defences are won or lost, because the BIF Act imposes a critical constraint: the adjudication response is generally limited to the reasons set out in the payment schedule. Everything depends, therefore, on two documents: the quality of the payment schedule served before the application, and the rigour of the response filed after it. This page explains how we approach both. For the claimant's perspective, see our guide to adjudication applications.

Response Deadlines Under the BIF Act

Once the Adjudication Registrar refers an application to a registered adjudicator, the respondent has a strictly limited period in which to lodge an adjudication response. Whether a response is permitted at all, and the applicable response period, depend on the BIF Act, including whether the claim is treated as a standard or complex payment claim. For complex claims, longer response periods generally apply, and the adjudicator may grant limited extensions. The current Act and the actual dates must be checked in every case, and we explain the framework in detail in our guide to adjudication timeframes.

The practical consequence is that a respondent must mobilise within days of receiving an application. The response must be lodged with the adjudicator and served on the claimant within the response period, and late responses may be disregarded entirely. We maintain the capacity to prepare comprehensive responses on urgent timelines, but earlier engagement always produces a stronger defence. The moment an application lands, call us.

The Payment Schedule Constraint

The single most important rule for respondents is this: under the BIF Act, the adjudication response is generally confined to the reasons for withholding payment that were set out in the payment schedule. Unless the adjudicator determines that exceptional circumstances justify new reasons, a respondent cannot raise new defences in the response that were not identified in the schedule. This rule was designed to prevent respondents from ambushing claimants with late arguments, and it makes the payment schedule the foundation of the entire defence.

A respondent who served a thin or perfunctory payment schedule is therefore fighting with one hand tied behind their back. Worse, a respondent who failed to serve a payment schedule at all may face a deemed liability for the full claimed amount under section 77 of the BIF Act, and may have no right to lodge a response at all. The lesson is that adjudication defence begins at the payment schedule stage, weeks before any application is filed. We draft and review payment schedules for head contractors and principals as a matter of routine, ensuring every reason for withholding is captured with the specificity the Act demands.

Drafting the Payment Schedule Properly

A payment schedule that will support a strong adjudication response must do more than state a scheduled amount. It must identify every reason the scheduled amount is less than the claimed amount, with sufficient detail to allow the claimant to understand the case they must meet and to ground the respondent's later submissions. Each deduction should be quantified and tied to its contractual or factual basis: defective or incomplete work, unapproved variations, backcharges, liquidated damages, set-offs, or amounts previously paid.

We advise respondents to treat every payment schedule as though it will one day be read by an adjudicator or a judge, because it often is. Vague assertions such as "works incomplete" or "claim rejected" provide no foundation for a later response and can leave the respondent unable to argue obvious defences. Our schedules set out each withholding reason with precision, reference the relevant contract clauses and records, and preserve the full range of arguments available at the adjudication stage.

Challenging Jurisdiction

The first line of defence to any adjudication application is jurisdiction. An adjudicator who acts without jurisdiction renders a determination that is void and liable to be set aside. We conduct a forensic review of every application for jurisdictional defects: whether the payment claim complies with section 75 of the BIF Act and relates to a valid reference date; whether the application was lodged within the applicable statutory timeframe; whether there is a construction contract as defined by the Act; whether the application was properly served; and whether the matters claimed have already been determined in earlier proceedings.

Jurisdictional arguments can be advanced in the response itself, and where a determination issues despite the defect, they form the basis of an application to the Supreme Court to set the determination aside. A determination made on an invalid payment claim, out of time, or in breach of natural justice can be brought to its knees. Our guide to adjudication enforcement explains the setting-aside process, including the narrow grounds on which courts will intervene.

Dismantling the Claimant's Quantum

Where jurisdiction is sound, the response must engage with the substance of the claim. Our engineer-lawyers are uniquely equipped for this task because quantum in construction disputes is as much an engineering question as a legal one. We dissect the claimant's progress claim line by line: testing measured quantities against drawings and site records, interrogating variation pricing against contract rates, scrutinising delay claims against the programme and contemporaneous records, and identifying duplication, overstatement, and claims for work never performed.

A persuasive response does not merely assert that the claim is inflated. It demonstrates precisely where and why, with reference to the contract, the evidence, and the claimant's own documents. We present the respondent's position in a clear, structured format that makes the adjudicator's task easy, because an adjudicator working under severe time pressure will follow the party who gives them the clearest path through the dispute.

Set-Offs and Counterclaims

Respondents frequently hold their own claims against the claimant: liquidated damages for delay, the cost of rectifying defective work, backcharges for site services, or amounts owed on other projects. Where available, we advance set-offs and cross-claims within the adjudication response, always within the boundaries of the payment schedule constraint. A properly particularised set-off can reduce or eliminate the adjudicated amount even where parts of the claimant's claim are made out.

Care is required, however. New counterclaims that were not raised in the payment schedule will generally fall outside the adjudicator's consideration, and the adjudicator lacks jurisdiction to determine unrelated disputes. We advise on which set-offs can be deployed in the adjudication and which are better pursued in separate proceedings, ensuring the defence strategy is coherent across all fronts.

The Consequences of Not Responding

Failing to lodge a response is the most damaging course available to a respondent. If no response is served within the applicable period, the adjudicator may determine the application on the claimant's submissions alone. The claimant's evidence goes untested, their quantum unchallenged, and their characterisation of the dispute unopposed. Unsurprisingly, determinations made in these circumstances are often for the full claimed amount, and they remain enforceable as judgment debts. Delay or indecision upon receiving an application can be devastating.

Even where the deadline appears impossible, options may exist: for complex claims, longer response periods apply, and in limited circumstances the adjudicator may allow further time. The critical point is to obtain advice immediately upon receipt of the application, not days later. We have prepared effective responses on extremely compressed timelines, but every hour of delay narrows the options available.

Strategy for Head Contractors and Developers

Effective adjudication defence is a discipline, not an event. We advise head contractors, developers, and principals to build defensibility into their contract administration: respond to every payment claim with a properly drafted payment schedule, within time, every time; maintain contemporaneous records of defects, instructions, and delays; and escalate to legal review the moment a payment dispute shows signs of hardening. Equivalent security of payment legislation operates in every Australian state and territory, and while the detail varies, the central disciplines are the same.

When an application arrives, our approach is structured: an immediate jurisdictional review, a candid assessment of the merits and exposure, and then rapid preparation of a response that advances every available argument within the payment schedule constraint. Where an adverse determination nonetheless issues, we advise on payment strategy, enforcement risk, and the prospects of setting the determination aside. The costs of defending adjudication are addressed in our guide to adjudication costs.

Frequently Asked Questions About Adjudication Responses

How long do I have to respond to an adjudication application? The response period depends on the BIF Act, including whether the claim is treated as a standard or complex payment claim. For complex claims, longer periods generally apply and limited extensions may be available. The current Act and the actual dates must be checked in every case. Contact us immediately upon receiving an application so the deadline can be confirmed and managed.

Can I raise reasons in my response that were not in the payment schedule? Generally no. The response is confined to the reasons set out in the payment schedule, unless the adjudicator determines exceptional circumstances justify new reasons. This is why the payment schedule must be drafted comprehensively and with legal precision from the outset.

What if I never served a payment schedule? Your position is seriously compromised. You may be liable under section 77 of the BIF Act for the full claimed amount as a debt due, and you may have no right to lodge an adjudication response. Urgent advice is essential, as other defensive avenues may still be available depending on the circumstances.

Can I challenge the adjudicator's jurisdiction in my response? Yes, and you should where a genuine defect exists. Jurisdictional arguments can be advanced in the response and, if the determination issues regardless, relied upon in an application to the Supreme Court to set the determination aside. See our guide to adjudication enforcement for the setting-aside process.

---

Contact Our Adjudication Response Specialists

If you have received an adjudication application, time is against you. The response period is short, the constraint imposed by your payment schedule is strict, and the consequences of an adverse determination are immediate. At Construction.Lawyer, our dual-qualified engineer-lawyers combine legal precision with genuine construction expertise to defend claims decisively, and we can mobilise on urgent timelines.

Call us today on 1300 710 864 to discuss your adjudication response with one of our senior practitioners. Visit our Brisbane headquarters at Suite 140, 167 Eagle Street, Brisbane QLD 4000, or contact one of our national offices in Sydney, Melbourne, Perth, or Darwin. We defend adjudication applications for head contractors, developers, and principals across Queensland and throughout Australia.