Guide · Security of payment · NT
Security of payment in the Northern Territory
The Territory runs the West Coast model: no payment schedules, no reference dates. The Act voids unfair payment terms, implies payment provisions into contracts that lack them, and gives either party 65 working days from a payment dispute arising to apply for adjudication. Miss that single window and the Act’s remedy is gone.
Construction Contracts (Security of Payments) Act 2004 (NT) · adjudication via registered adjudicators via prescribed appointers, overseen by the Construction Contracts Registrar
General information, not legal advice. Deadlines depend on your contract and the current Act, both of which change. Verify against the Act and your executed contract, or get advice, before relying on anything here.
How does security of payment work in the Northern Territory?
Differently from every state except pre-2022 WA. The NT Act does not create payment claims and payment schedules. Instead it voids prohibited payment terms, implies payment provisions into contracts that do not deal with them (Sch 1), and lets either party take a "payment dispute" to rapid adjudication (Part 3). Claims run both ways: principals can claim against contractors too (s 7A).
A payment dispute arises when a payment claim is rejected or disputed, or the amount is due and not paid in full, or retention money or security due for return is withheld (s 8). That moment starts the only adjudication clock the Act has.
Who is covered by the NT Act?
Anyone obliged under a construction contract to carry out construction work, supply related goods, or provide professional or on-site services in the Territory (s 5), and the parties on the other side of those contracts. There is no owner-occupier carve-out, so homeowners are covered. The main exclusion is resources work: drilling for oil or gas and constructing shafts, pits or quarries for extracting minerals (s 6(2)).
- Parties to a high value construction contract can contract out of the adjudication part if the contract contains a compliant dispute resolution mechanism (s 10A); the threshold is set by regulation, so check the current figure.
- Watercraft construction is excluded (s 6(3)).
How long do I have to respond to a payment claim in the NT?
If your contract deals with responding to claims, the contract governs. If it is silent, the Act implies terms: a party who disputes or rejects a claim must give a notice of dispute within 10 working days of receiving it, and pay any undisputed part; otherwise the whole claim must be paid within 20 working days (Sch 1 cl 6(2)).
The notice of dispute must be written, identify the claim, state and explain the reasons for rejecting or disputing it, and state the amount the party is willing to pay (Sch 1 cl 6(3)).
When is payment due under the NT Act?
Whatever your contract says, capped: a provision requiring payment more than 30 working days after a claim is read down to 30 working days (s 13). Pay-if-paid and pay-when-paid provisions are void (s 12). If the contract is silent, the implied terms require payment of an undisputed claim within 20 working days (Sch 1 cl 6(2)(b)).
How long do I have to apply for adjudication in the NT?
Sixty-five working days after the payment dispute arises (s 28(1)), counted from the day after it arises (s 28(3)). One window covers everything: rejected claims, non-payment, withheld retention and unreturned security. There are no separate triggers, and no second chance except the limited re-application paths in s 39.
- The respondent has 15 working days after being served to lodge a response (s 29(1)).
- A prescribed appointer must appoint a registered adjudicator within 5 working days (s 30(1)); the Registrar can appoint in default (s 30(2)).
- The adjudicator must dismiss or determine within 10 working days after the response is lodged or falls due (s 33), extendable by 5 working days for procedural fairness (s 33(2B)) or longer with the Registrar’s consent (s 34(3)(a)). Run out of time and the application is taken to be dismissed (s 33(2)), with 20 working days to re-apply (s 39(2)(b)).
- Determinations are enforced by filing a Registrar-certified copy in court (s 45), and work can be suspended on 3 working days notice for non-payment (s 44).
What catches people out under the NT Act?
- One clock rules everything: 65 working days from the payment dispute arising (s 28(1)). Disputes often "arise" earlier than people think, on the day payment fell due and was not made in full, not the day an argument crystallises.
- Claims and adjudications run both directions: a principal can serve a payment claim on, and adjudicate against, a contractor (s 7A, s 27).
- A "working day" excludes the whole period from 25 December to 7 January (s 4), a materially longer shutdown than the eastern states’ 27 to 31 December.
- If the adjudicator does not decide in time the application is deemed dismissed (s 33(2)); you then have 20 working days to apply again (s 39(2)(b)).
- The merits of a determination are final (s 43); NTCAT review is limited to dismissal-type decisions (s 58), so there is no second run at the substance.
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Open the deadline calculatorFrequently asked questions
How long do I have to apply for adjudication in the NT?
Sixty-five working days after the payment dispute arises, counted from the day after it arises (s 28(1), (3)). The 2019 amendments replaced the old 90 day period. One window covers rejected claims, non-payment, retention and security disputes alike.
Does the NT have payment schedules?
No. The NT follows the West Coast model. If a contract is silent, the Act implies terms instead: a notice of dispute within 10 working days of receiving a claim, or payment of the whole claim within 20 working days (Sch 1 cl 6(2)).
When does a payment dispute arise in the NT?
When a payment claim is rejected or wholly or partly disputed, or the claimed amount is due and not paid in full, or retention money or security due for return is withheld (s 8). Non-payment on the due date starts the clock by itself; no rejection is needed.
Can a principal use the NT Act against a contractor?
Yes. Since the 2019 amendments payment claims run both ways (s 7A), and any party to a construction contract can apply for adjudication of a payment dispute (s 27).
What counts as a working day in the NT?
Any day other than a Saturday, Sunday or public holiday in the relevant place, and excluding the whole period from 25 December to 7 January (s 4). That end-of-year exclusion is much longer than the eastern states’ 27 to 31 December.
Is there a cap on payment terms in the NT?
Yes. A contract provision requiring payment more than 30 working days after a payment claim is read down to 30 working days (s 13), and pay-if-paid or pay-when-paid provisions are void entirely (s 12).
Primary sources
General information, not legal advice. Deadlines depend on your contract and the current Act, and amendments move them. Verify against the Act and your executed contract, or get advice, before relying on any date here.
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