Payment is where construction contracts get tense. The work is done, the invoice goes in — and then the waiting starts. In New Zealand, the rules of that game aren’t really set by your contract; they’re set by the Construction Contracts Act 2002 (the CCA). It governs how you claim payment, how the other side has to respond, and — crucially — what happens when they don’t.
Understanding it is the difference between getting paid on time and chasing money you’re already legally owed. This is a plain-English walk through payment claims and payment schedules under the CCA, the deadlines that actually matter, and how it all sits alongside NZS 3910.
(This is general information to help you understand the framework, not legal advice. For a specific dispute, talk to a construction lawyer.)
What the CCA 2002 is — and why it exists
Before the Act, the party doing the work carried almost all of the cashflow risk. Payment could be delayed for months while a single disputed item held up an entire claim, and “pay-when-paid” clauses pushed the risk even further down the chain.
The CCA changed the default. Its core idea is “pay now, argue later”: money keeps flowing on the undisputed value of work while genuine disputes are resolved separately and quickly. The Act bans pay-when-paid clauses, gives the unpaid party the right to suspend work, and provides adjudication as a fast, low-cost way to settle payment disputes. You cannot contract out of it — its protections apply to construction contracts whether your agreement mentions them or not.
The two documents that run the show
Almost everything in the CCA comes down to two documents and the clock between them:
- The payee (usually the Contractor) serves a payment claim.
- The payer (the Principal — under NZS 3910, via the Engineer) responds with a payment schedule.
Get those two documents right, on time, and the system works smoothly. Get one of them wrong — or late — and the consequences are severe and one-sided.
What makes a valid CCA 2002 payment claim
A payment claim only earns the Act’s protections if it’s done properly. In general terms, it must be in writing and:
- State that it is a payment claim under the CCA 2002
- Identify the contract and the work it relates to
- State the claimed amount and the due date for payment
- Indicate how the amount was calculated
For residential contracts there’s an extra step — the claim must include the prescribed explanation of the payment process (the “Form 1” outline). Miss a required element and you may not have a valid payment claim at all, which means you lose the powerful protections that follow. The details are not bureaucratic box-ticking; they’re the price of entry.
What makes a valid CCA 2002 payment schedule
The payment schedule is the payer’s response, and it’s where most expensive mistakes happen. To be valid it must:
- Identify the payment claim it responds to
- State the scheduled amount — the amount the payer actually proposes to pay
- If the scheduled amount is less than claimed, state why, and how the difference was calculated — the reasons for withholding
That last point matters enormously. If you’re going to pay less than claimed, your reasons have to be clear and specific. Vague, late or generic reasons leave you badly exposed if the matter goes to adjudication — an adjudicator can only weigh the reasons you actually gave, on time.
CCA 2002 timeframes — and the trap
If your contract specifies timeframes, you use those. If it’s silent, the CCA’s defaults apply — broadly, a payment schedule within 20 working days of the payment claim, with payment following on the contract’s due date. NZS 3910 sets its own timeframes, written to comply with the Act, so on an NZS 3910 job you’ll work to the contract’s payment cycle.
The trap is simple to describe and brutal in effect: if the payer doesn’t provide a valid payment schedule within the time allowed, the payer becomes liable to pay the full amount claimed — not the amount they think the work was worth. The amount the Contractor claimed.
Miss the deadline, owe the lot: a worked example
(Using the same fictional “Pukenui Road Bridge” project from our variations worked example.)
The Contractor serves Payment Claim 8 for $312,000 — a valid claim, properly marked up under the CCA.
The Engineer and Principal are flat out closing the month. The payment schedule slips past the deadline by a few days. No one means anything by it.
The consequence under the Act: the payer is now liable for the full $312,000 — regardless of whether the work, properly assessed, would have come in at $312,000 or somewhat less — because they didn’t schedule in time. The Contractor can:
- Recover the $312,000 as a debt in court, often by summary judgment, with limited room for the payer to argue the figure down; or
- Suspend work on notice; or
- Take it to adjudication.
One missed date converted a routine claim into a non-negotiable $312,000 liability. This single mechanism is why payment-schedule deadlines should be treated as the hardest dates in your contract calendar.
How this maps onto NZS 3910
Under NZS 3910 the four parties are the Principal, Contractor, Engineer and Engineer’s Representative. When the Contractor serves a payment claim, it’s the Engineer — acting independently — who assesses the work and issues the payment schedule (payment certificate) within the contract’s timeframe, not the Principal directly.
The key thing to understand is that the CCA sits underneath the contract. Following the NZS 3910 payment procedure correctly will normally keep you compliant — but the Act’s minimum requirements and its consequences apply regardless of what the contract says. The contract is the process; the CCA is the floor.
Your remedies if you’re not paid
If a valid payment claim isn’t paid (and wasn’t properly scheduled), the unpaid party has real leverage:
- Suspend work — on the required notice, without being in breach.
- Recover the amount as a debt — through the courts.
- Adjudication — a fast, low-cost process designed to deliver a decision in weeks rather than the months litigation takes. The adjudicator’s determination is binding on an interim basis, so cash moves while any larger dispute continues.
Where it goes wrong
- A payment claim missing a required element — so it’s not valid, and none of the protections apply.
- The payer treating the schedule deadline as soft — and inheriting the full claimed amount.
- Reasons for withholding that are too vague to stand up at adjudication.
- Losing track of which claim is due when across multiple live claims and contracts.
- Confusing the contract’s timeframes with the Act’s defaults.
Notice how many of these are administration failures, not disagreements about the work. The money is rarely lost on the merits — it’s lost on a missed date or a missing line.
A note for Australian projects
The CCA 2002 is New Zealand law. Australia has equivalent Security of Payment legislation — but it’s state-by-state, with the same “pay now, argue later” philosophy and very different timeframes, forms and rules. If you work both sides of the Tasman, don’t assume the New Zealand rules carry over.
How Gnosis handles payment claims
This is exactly the kind of administration that shouldn’t depend on someone remembering a date. Gnosis is your contract administration assistant: it tracks every payment claim and, critically, the response deadline — so a payment schedule is never missed. It helps draft compliant claims and schedules, links them to certified variations and the running Contract Price, and warns you before the clock runs out.
It works for NZS 3910 and AS 4000, with the right rules and tax treatment for New Zealand and Australia. If the dates that can cost you a contract’s margin are the ones you’re tracking in your head or a spreadsheet, that’s the part we take off your plate. See how it works or book a walkthrough.
Frequently asked questions
What happens if the payer doesn’t send a payment schedule in time?
The payer generally becomes liable for the full amount claimed. The payee can recover it as a debt, suspend work on notice, or go to adjudication.
Does the CCA 2002 apply if our contract is NZS 3910?
Yes. The Act applies to construction contracts regardless of what form you use. NZS 3910’s payment provisions are written to comply with it.
Can we contract out of the CCA 2002?
No. Its protections are mandatory, and pay-when-paid clauses are unenforceable.
How fast is adjudication?
It’s designed to be quick — weeks, not months — with an interim-binding decision so cash keeps moving.
Who issues the payment schedule under NZS 3910?
The Engineer, acting independently, in response to the Contractor’s payment claim and within the contract timeframe.
Written by Alexios Kavallaris, founder of Gnosis. Alexios is a civil engineer with 27 years on roading and infrastructure projects across Greece, the United Kingdom, New Zealand and Australia — including around five years with Waka Kotahi NZTA on the Waikato Expressway, administering some of the largest NZS 3910 contracts in the country. He won the 2020 Engineering Science Award and founded Gnosis in 2023 to build the contract administration tool he’d needed on every project.
This article is general information, not legal advice.
