The NSW payment-claim deadline kit

PART 1 · The rules, plainly

What the NSW Act actually says

The rule that ruins respondents is short. Under the Building and Construction Industry Security of Payment Act 1999 (NSW), a payment schedule is generally due within 10 business days after the payment claim is served, or earlier if your contract says so (s 14(4)). Serve it late and it generally has no effect under the Act, which can leave you barred from raising defences in adjudication. That is the whole game. Everything else is counting correctly.

Business day (s 4) means any day except: Saturday or Sunday, a public holiday, or 27, 28, 29, 30 or 31 December. The Christmas shutdown is baked into the definition. Counting starts the day after service: the service date itself is day zero.

What makes it a payment claim at all (s 13(2)): it must identify the construction work (or related goods and services) the payment is claimed for, state the claimed amount, and state that it is made under the Act. Miss any of those and you may not be holding a payment claim, which means the 10-day clock may never have started. That is why the validity screen comes before the calculator.

QLD, briefly (general information only): under the Building Industry Fairness (Security of Payment) Act 2017 (Qld), the schedule window is 15 business days, and QLD business days additionally exclude 22 to 24 December and 2 to 10 January. Different clock, different exclusions. Never apply the NSW count to a QLD claim.

PART 2 · The calculator

NSW payment-schedule deadline calculator

Enter the date the payment claim was served. The calculator counts 10 business days forward under s 14(4) and s 4, and shows every date it counted or skipped, so you can verify the arithmetic yourself.

Worked example: claim served Monday 5 Oct 2026 (NSW). Day zero is Mon 5 Oct. Counting 10 business days forward, skipping weekends: Tue 6 (1), Wed 7 (2), Thu 8 (3), Fri 9 (4), Mon 12 (5), Tue 13 (6), Wed 14 (7), Thu 15 (8), Fri 16 (9), Mon 19 (10). Deadline: Monday 19 October 2026. Serve early anyway; the post does not care about your arithmetic.

PART 3 · Screen before you count

Claim-validity screening checklist

Run this before the calculator. A "no" anywhere it matters means the clock may not be what you think, and the next step is a solicitor, not a date.

• Is there a construction contract? No contract, different lane. The Act's payment-claim machinery runs on contracts.
• Does the document identify the work and state a claimed amount? (s 13(2)(a)-(b)) Vague demands are not payment claims.
• Does it state it is made under the Act? (s 13(2)(c)) Look for the words. Their absence is a red flag, not a technicality.
• Was it served in time? A payment claim must be served within 12 months after the work was last carried out, or within the period the contract allows if that is longer (s 13(4)). An out-of-time claim starts no clock.
• Was service effective? Email to the right address, hand delivery, post to the right address: service rules live in your contract and in s 31. If service is arguable, say so and get advice.
• Has a schedule already been served for this claim? One claim, one schedule. Do not serve twice and confuse the record.
• Does your contract shorten the window? s 14(4) says 10 business days or earlier if the contract requires. Read the payment clause. The contract can only shorten, never extend, your risk.

PART 4 · The diary routine

T-3 / T-1 / T-0 diary templates

There is no monitoring service here. There is you, a calendar, and these three entries. Make them the day the claim arrives; the whole system costs four minutes.

Put all three in your phone calendar and your site diary the day the claim is served. Set the alerts to actually alert. A reminder nobody sees is decoration.

PART 5 · When the window may already have passed

The escalation script

If the calculator says the deadline is today or gone, do not serve a late schedule and pretend. A late schedule generally has no effect under the Act, and serving one can create a paper trail of confusion. Do this instead:

1. Call your construction solicitor today. Not tomorrow. The options that remain (adjudication response strategy, s 17(2) notice considerations, negotiation posture) are legal strategy, and this pack does not do legal strategy.
2. Preserve everything: the claim, proof of when and how it was served on you, your contract's payment clause, and any correspondence. Do not "tidy up" the file.
3. Do not admit anything in writing to the claimant about the missed date until the solicitor has seen the file.