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Construction Contracts (Security of Payments) Act 2004 (NT)

NT Construction Contracts (Security of Payments) Act 2004 follows the West Coast SOP model: 28 days to pay, 14 days dispute notice, 65 working days to adjudicate.

By Dan Waring. Last updated 16 May 2026. Verified 16 May 2026.

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In plain English

The Construction Contracts (Security of Payments) Act 2004 (NT) is the Northern Territory’s security-of-payment legislation. It performs the same role as NSW’s Security of Payment Act 1999 and Queensland’s BIF Act 2017: it gives contractors and subcontractors a statutory route to recover unpaid progress claims through fast-track adjudication. The NT Act follows the West Coast SOP model (alongside WA), which differs structurally from the East Coast model used by NSW, Vic, Qld, SA, Tas and ACT. The difference matters in practice (verified 2026-05-16).

West Coast vs East Coast model. The simplest way to keep them apart:

AspectEast Coast (NSW, Qld, etc.)West Coast (NT, WA)
Claim formStatutory payment claim under the ActAny contractual claim for payment under the contract
Respondent’s replyStatutory payment schedule within a fixed windowA notice of dispute within a shorter window, or implicit dispute by non-payment
Adjudication triggerSchedule short, late or missingNotice of dispute issued or payment overdue
Adjudicator scopeDecide the claim and schedule on the documents lodgedDecide the payment dispute on the merits, more akin to commercial adjudication
DeterminationInterim binding for cashflow, revisable in courtSame interim-binding effect

A NT builder who knows only the East Coast SOP framework will run into procedural traps in the NT (and vice versa).

What it requires

For a contractor or subcontractor on a NT construction contract:

  1. Make a payment claim under the contract (no separate statutory endorsement is required to invoke the Act, unlike NSW s.13(9)).
  2. Wait the contract’s payment terms or, in the absence of contract terms, 28 days for payment to be made.
  3. Issue a notice of dispute if the claim is not paid within 14 days of the claim, OR allow payment to remain overdue. Either triggers the dispute path under the Act.
  4. Lodge an adjudication application within 65 working days after the payment dispute arises (or within 20 working days after a previous application is dismissed). The application is served on the other party and on the appointer.
  5. Wait for adjudicator appointment. The appointer (typically the Society of Construction Law Australia’s adjudication panel, or another prescribed appointer) has 5 working days to nominate an adjudicator.
  6. Adjudicator determination binds the parties for cashflow. The determination is enforceable as a judgment.

What it doesn’t cover

  • Final determination of contract merits. Like its East Coast siblings, the NT Act is interim. The determination can be revisited by the courts.
  • Builder licensing for residential work. That sits under the NT Building Practitioners Board licensing regime.
  • Civil construction outside the “construction work” definition. Some mining and resource work is excluded.
  • Statutory trust accounts. The NT Act has no trust-account regime equivalent to NSW s.12A, WA Part 4, or Qld BIF Chapter 2. Retention money on NT projects sits in the head contractor’s general accounts unless the contract specifies otherwise.

Practical implications

  • The 28-day payment window applies unless the contract says otherwise. Many NT contracts specify a shorter payment term (e.g. 14 or 21 days). The contract terms govern; the 28 days is the fallback if the contract is silent.
  • No supporting statement requirement. Unlike NSW (s.13(7) supporting statement), the NT Act does not require a head-contractor declaration that subcontractors have been paid. This is a procedural difference worth knowing if you cross-jurisdictional.
  • The 65-working-days adjudication clock is generous. Compared with NSW’s 10-business-day window from payment schedule, the NT window is far longer; missed deadlines are less common but every missed-deadline case is still fatal to the application.
  • Builder-side discipline still matters. Even though the NT model is more flexible procedurally, builders who issue clear payment claims, accept clean disputes, and keep good records will adjudicate faster and win more often than those running ad-hoc claims.
  • Retention money has no statutory trust. A subcontractor’s retention on a NT project sits with the head contractor as a normal contractual entitlement. Bring this into the contract negotiation if you are concerned about head-contractor insolvency.

References

See also

Last updated: 2026-05-16. Verified: 2026-05-16. Quarterly review for currency.

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