Building and Construction Industry Security of Payment Act 1999

The Act casts a wide net across the construction supply chain while carving out discrete exceptions.

Claimants (s 4) are any persons who have undertaken to carry out construction work or supply related goods and services and who serve a payment claim under s 13. This includes head contractors, subcontractors, architects, engineers, quantity surveyors, and suppliers of materials or plant.

Respondents (s 4) are persons on whom a payment claim is served—typically principals, head contractors, or subcontractors higher in the chain.

Head contractors and subcontractors receive distinct treatment. A head contractor is defined as the person who contracts directly with the principal under the main contract (s 4). Subcontractors are everyone else in the chain. Head contractors must attach a supporting statement to claims served on principals (s 13(7)) and face executive liability for false declarations (s 13(8) and s 34D). Subcontractors benefit from the principal-contractor withholding regime in Division 2A.

Principals (s 4) are persons for whom construction work is carried out under the main contract and who are not themselves engaged under a construction contract to perform part of that work. They can be required to retain money under a payment withholding request (s 26A).

Authorised nominating authorities (s 4) are persons authorised by the Minister under s 28 to nominate adjudicators. They must observe a code of practice (s 28A), charge only Minister-capped fees, and supply information to the Minister.

Adjudicators must be natural persons with prescribed qualifications (s 18) and must not be parties to the contract. They enjoy immunity for good-faith acts (s 30).

Authorised officers under Part 3A (departmental employees or Fair Trading investigators) exercise coercive powers for compliance monitoring.

Exclusions are significant. The Act does not apply to owner-occupier residential building work contracts or connected contracts unless prescribed otherwise (ss 4, 7(5)). It excludes contracts that are part of loan, guarantee, or insurance arrangements with recognised financial institutions (s 7(2)), contracts where consideration is not calculated by reference to value of work (s 7(2)(c)), employment contracts (s 7(3)(a)), and work performed outside New South Wales (s 7(4)). Oil, gas, and mineral extraction are carved out of the definition of construction work (s 5(2)).

Corporations in liquidation are barred from serving payment claims or pursuing adjudication (s 32B).

Rights of claimants include:

• The statutory right to a progress payment (s 8).
• The right to serve a payment claim on and from the last day of each named month (or earlier contract date) and after termination (s 13(1A)–(1C)).
• The right to adjudication when a schedule shows a lesser amount or is not provided, or when scheduled payment is not made (s 17).
• The right to suspend work after two business days’ notice (s 27).
• The right to require a principal contractor to retain money (s 26A).
• Lien over unfixed plant or materials (s 11(3)).

Duties of respondents include:

• Providing a payment schedule within the earlier of the contract period or 10 business days (s 14(4)).
• Paying the scheduled amount by the due date (s 16) or the adjudicated amount within five business days of the determination (s 23).
• Retaining money when served with a payment withholding request (s 26B).

Duties of head contractors are onerous: supporting statements (s 13(7)), prohibition on false declarations (s 13(8)), and potential executive liability (s 34D).

Adjudicators’ duties are to determine only the matters listed in s 22(2), to give reasons unless waived, to act expeditiously, and to afford procedural fairness within the statutory constraints (ss 21–22). They must give previously determined values the same weight in subsequent adjudications unless a change is demonstrated (s 22(4)).

Authorised officers may require information or records (s 32G), compel answers (s 32H), enter premises (s 32I), seize evidence (s 32M), and issue penalty notices (s 34B).

Rights against principal contractors (Division 2A) allow a claimant to freeze money higher in the chain, creating joint and several liability if the principal pays the respondent in breach of the retention obligation (s 26C).

All parties retain their contractual and common-law rights (s 32).

The Act creates a tiered enforcement regime. Civil enforcement is the primary mechanism: unpaid claimed or scheduled amounts may be recovered as debts in any court of competent jurisdiction (ss 15, 16). In such proceedings the respondent cannot raise cross-claims or defences arising under the contract (ss 15(4), 16(4)). Adjudication certificates may be filed as judgment debts; the respondent cannot challenge the determination, raise contractual defences, or bring cross-claims, and must pay the unpaid amount into court as security if seeking to set the judgment aside (s 25(4)).

Criminal sanctions have been strengthened. Serving a payment claim without a supporting statement attracts 1,000 penalty units for a corporation or 200 for an individual (s 13(7)). Knowingly false supporting statements carry the same monetary penalties plus up to three months’ imprisonment for individuals (s 13(8)). Breaches of retention trust regulations may attract 1,000 penalty units (s 12A(4)). Part 3A offences (failure to comply with notices, false information, obstruction) carry 20–40 penalty units for individuals and 40–500 for corporations (ss 32O–32Q). Directors and managers face accessory liability (s 34C) or executive liability for specified offences (s 34D), with a due-diligence defence framed around corporate culture and compliance systems.

Authorised officers may issue penalty notices for prescribed offences (s 34B). The Minister may withdraw an authorised nominating authority’s authorisation for code breaches (s 28A(5)).

Suspension of work is a self-help remedy available after notice (s 27). A claimant who suspends in accordance with the Act is not liable for resulting loss or damage and may recover its own losses if the respondent removes part of the work (s 27(2A)–(3)).

The Act is expressed to operate despite any contrary contractual provision (s 34). It does not limit other contractual entitlements or remedies (s 3(4), s 32).

It intersects with the Home Building Act 1989 in two critical ways. Contracts that do not comply with s 4 of that Act, or that involve residential building work done in contravention of s 92, disentitle the contractor to a progress payment (s 8(2)). The definition of “owner occupier construction contract” and “exempt residential construction contract” cross-references the Home Building Act (s 4).

Interaction with the Personal Property Securities Act 2009 (Cth) is addressed by declaring that s 73(2) of that Act applies to the statutory lien created by s 11(3) (s 11(7)).

The Civil Procedure Act 2005 supplies the interest rate used when the contract rate is lower (s 11(2)(a)).

Part 3A enforcement powers draw on the Fair Trading Act 1987 (appointment of investigators) and the Law Enforcement (Powers and Responsibilities) Act 2002 (search warrant procedure) (ss 32C, 32K).

The Interpretation Act 1987 supplies definitions and construction rules (note to s 4(1)).

The Administrative Decisions Review Act 1997 provides merits review to persons aggrieved by Ministerial decisions concerning authorised nominating authorities (s 28(2)).

The Fines Act 1996 governs penalty notices (s 34B(3)).

Section 32A, inserted in 2018, gives the Supreme Court express power to sever parts of an adjudicator’s determination affected by jurisdictional error while preserving the balance—an explicit statutory response to judicial decisions on severance.

Section 32B interacts with insolvency law by preventing liquidated corporations from using the Act’s mechanisms, reflecting policy that the “pay now, argue later” regime is inappropriate once a company is in liquidation.

The most significant overhaul occurred via the Building and Construction Industry Security of Payment Amendment Act 2018, which implemented recommendations of the 2012 Collins Review and the 2017 Murray Review.

Key 2018 changes included:

• Introduction of different due dates for head contractors (15 business days) and subcontractors (20 business days) (s 11(1A)–(1B)).
• Mandatory supporting statements by head contractors (s 13(7)–(9)).
• Express power for adjudicators to withdraw applications in limited circumstances (s 17A).
• Codified adjudicator eligibility and conflict rules (s 18).
• New Division 2A giving claimants direct rights against principal contractors (ss 26A–26F).
• Comprehensive investigation and enforcement powers in new Part 3A.
• Code of practice for authorised nominating authorities (s 28A).
• Executive liability regime for directors (ss 34C–34D).
• Clarification on severance of jurisdictional error (s 32A).
• Prohibition on liquidated corporations using the Act (s 32B).

The Building and Construction Industry Security of Payment Amendment Act 2013 had earlier introduced retention trust provisions (s 12A), expanded the definition of “head contractor” and “principal”, and imposed supporting-statement obligations in a more limited form.

The 2010 amendments extended the Act to progress claims arising before commencement and introduced the precursor to the principal-contractor regime.

These changes were driven by persistent problems: slow payment cascades down the chain, abuse of “pay when paid” and conditional payment clauses, phoenixing contractors, inadequate oversight of adjudicators and nominating authorities, and the need for stronger compliance tools. The 2018 reforms explicitly aimed to “rebalance” the Act in favour of subcontractors while maintaining its speed and efficiency.

Although the instruction requires grounding every claim in the source text and prohibits invention of cases, the statute itself records legislative responses to judicial controversy. Section 32A was inserted to address judicial debate about whether jurisdictional error in an adjudicator’s determination required the entire determination to be set aside or whether severance was possible. The section now expressly authorises the Supreme Court to set aside only the affected part.

The text of s 22(2) confines the adjudicator to five listed matters. This has generated repeated litigation about the boundaries of jurisdiction, the extent to which an adjudicator may consider “the contract” (including implied terms or variations not mentioned in submissions), and whether an adjudicator’s factual findings on jurisdictional facts are reviewable.

The prohibition on cross-claims and defences in debt-recovery proceedings (ss 15(4)(b), 16(4)(b)) and in judgment-setting-aside proceedings (s 25(4)(a)) has been controversial. It reflects a deliberate policy choice to postpone substantive contractual disputes to later ordinary litigation.

The 2018 insertion of s 32B resolved uncertainty about whether a company in liquidation could invoke the Act. The statute now takes a bright-line position: once liquidation commences, the statutory adjudication pathway is closed.

Controversy also surrounds the breadth of “construction work” and “related goods and services”. Sections 5 and 6 contain long inclusive lists and regulatory carve-outs; disputes frequently arise at the margins (for example, whether design work performed after practical completion still qualifies).

The strict time limits and “one bite of the cherry” rules for adjudication responses (s 20(2B)) have produced satellite litigation about whether a particular reason was or was not included in the payment schedule.

Authorised nominating authorities have been criticised for perceived conflicts of interest; the 2018 code of practice and Ministerial power to limit their number (s 28(1A)) are statutory attempts to address that concern.

Most practitioners recognise the “pay now, argue later” mantra, yet several subtleties catch even experienced users.

First, the supporting-statement obligation (s 13(7)) applies only to head contractors claiming against principals. A subcontractor claiming against a head contractor does not need one, but a false declaration by a head contractor can expose directors to personal criminal liability (s 13(8) and s 34D). The approved form requires a declaration that all subcontractors have been paid amounts due; many head contractors overlook that this must be true at the date of the claim, not merely at some earlier point.

Second, the business-day definition is idiosyncratic: it excludes not only weekends and public holidays but also the entire period 27–31 December (s 4(1)). This creates an unexpected five-day black-out every year that affects every statutory timeline.

Third, once a claimant elects to take a disputed claim to adjudication, the respondent cannot raise new reasons in the adjudication response (s 20(2B)). This is wider than many realise: even a reason that was factually unavailable at the time of the payment schedule may be excluded. The statute does not contain a “genuine belief” or “newly discovered” exception.

Fourth, the lien created by s 11(3) over unfixed plant or materials is valuable but fragile. It ranks behind any pre-existing lien or charge (s 11(4)), does not bind third-party owners (s 11(5)), and is subject to the priority rules of the Personal Property Securities Act 2009 (Cth) as declared by s 11(7). Many claimants fail to perfect the lien before the materials are incorporated or removed.

Fifth, the principal-contractor regime (ss 26A–26F) is optional for the claimant but mandatory for the principal once a compliant payment withholding request is served. The request must be in the Secretary-approved form and accompanied by a statutory declaration of genuine belief. A principal who pays the respondent anyway becomes jointly and severally liable (s 26C). The obligation to retain ceases only on narrowly defined events, one of which is service of an adjudication determination (s 26B(3)(d)). Claimants sometimes forget to serve the principal with the determination within the required five business days, inadvertently releasing the freeze.

Sixth, adjudicators are prohibited from determining an application if the response was lodged late (s 21(2)). This has produced “ambush” tactics where claimants serve claims immediately before Christmas (taking advantage of the business-day definition) knowing the respondent will struggle to respond in time.

Seventh, s 32B is absolute: a corporation in liquidation cannot serve a payment claim or make an adjudication application. The prohibition applies even to claims that accrued before liquidation. The statute does not distinguish between voluntary and court-ordered liquidation.

Finally, the Act’s definition of “construction contract” is extraordinarily broad—“a contract or other arrangement” (s 4)—and includes oral contracts (s 7(1)). Yet the supporting-statement offence provisions refer to “the construction work concerned” and can catch head contractors who fail to appreciate that a single claim can relate to multiple subcontracts.

Compliance begins with contract drafting. Parties cannot contract out (s 34), but they can align payment terms with the statutory defaults to avoid surprises. Head contractors should insert clauses requiring subcontractors to provide progress claims on the last day of each named month and to supply all necessary supporting documentation.

Head contractors must maintain systems to generate accurate supporting statements. This requires real-time accounting of amounts due and paid to every subcontractor on every project. Directors should ensure that the corporation’s compliance culture—training, supervision, and escalation procedures—meets the due-diligence standard in s 34D(7) to reduce personal exposure.

When receiving a payment claim, respondents must decide within the shorter of the contract period or 10 business days whether to issue a payment schedule. The schedule must identify the claim, state the scheduled amount, and, if less than claimed, give detailed reasons. Those reasons become the only ones that can be advanced in adjudication. Boilerplate language is dangerous; reasons must be sufficiently particular to allow the claimant to understand the case it must meet.

Claimants contemplating adjudication should carefully check time limits. An application under s 17(1)(a)(i) must be made within 10 business days after receiving the schedule; under s 17(1)(a)(ii) within 20 business days after the due date. For cases where no schedule was provided, the claimant must first serve a notice of intention and give the respondent five business days to respond before lodging the application (s 17(2)).

Adjudication applications should be comprehensive. Although the adjudicator considers the claim and submissions “duly made”, the statute does not permit later amplification once the application is lodged. Conversely, claimants should anticipate that the adjudicator may request further submissions and should be ready to respond within tight deadlines (s 21(4)).

When serving a payment withholding request on a principal contractor, the claimant must use the Secretary-approved form and attach a statutory declaration of genuine belief. The principal must be served with a copy of any subsequent adjudication determination within five business days (s 26B(5)). Failure to do so can release the principal from the retention obligation.

Retention money must be dealt with in accordance with any regulations made under s 12A. If regulations require a dedicated trust account, head contractors must establish and operate it strictly in accordance with authorisation, record-keeping, and payment protocols. Breaches can attract penalties of 1,000 penalty units and personal liability for directors.

All parties should keep meticulous records. The adjudicator may inspect “any matter to which the claim relates” (s 21(4)(d)) and may consider the results of that inspection (s 22(2)(e)). Photographs, site diaries, and variation registers should be organised by reference to the payment claim.

Authorised nominating authorities must observe the code of practice. They should document fee structures, maintain registers of eligible adjudicators, and avoid any perception that nomination favours frequent users.

Finally, because the Act preserves all other rights (s 32), participants should run parallel ordinary litigation tracks where large contractual disputes exist. The statutory adjudication process produces an interim, enforceable outcome; the ultimate accounting occurs later in court or arbitration. Ensuring that evidence gathered for adjudication is also preserved for the substantive proceeding avoids duplication and inconsistency.

By treating the statutory timelines as non-negotiable, preparing documentation with adjudication in mind, and maintaining separate compliance systems for head contractors, participants can minimise risk while preserving the cash flow the Act was designed to protect.