Waterproofers and Unpaid Invoices: A Recovery Roadmap

If you’re a waterproofer waiting weeks or months for payment on a completed job, you’re not alone. Construction cash flow is brutal, and subcontractors often wear the pain when head contractors or builders drag their feet. The good news: Australia’s Security of Payment legislation exists specifically to stop that happening. The better news: you don’t need a lawyer to use it.

This roadmap walks you through what to do when invoices go unpaid, how the law works in your state, and what your next step actually looks like.

Understand Your State’s Security of Payment Act

Australia’s construction payment laws differ by state, but they all work on the same principle: if you’ve done the work and issued an invoice, you have the right to a quick decision on payment — not years of waiting. Every state has passed its own Security of Payment (or similar) legislation:

• New South Wales: Security of Payment Act 1999
• Victoria: Security of Payments Act 2002
• Queensland: Building Industry Fairness (Security of Payment) Act 2017
• South Australia: Building and Construction Industry Security of Payment Act 2009
• Western Australia: Construction Contracts Act 2004
• Tasmania: Building and Construction Industry Security of Payment Act 2009
• ACT: Building and Construction Industry (Security of Payment) Act 2009
• Northern Territory: Construction Contracts (Security of Payments) Act 2004

The specifics vary — response timelines, claim formats, adjudication processes — but the core principle is identical: you can lodge a formal payment claim and force a response within a set timeframe. For example, under the NSW SOP Act 1999, a respondent has 10 business days to issue a payment schedule setting out what they’ll pay and when. If they don’t respond, or if the payment schedule is unreasonable, you can escalate to fast-track adjudication.

Check your state’s legislation online or ask your industry body. Know the rules before you need them.

Get Your Documentation in Order (Right Now)

Before you lodge anything, you need proof that you did the work and deserve payment. This isn’t about being paranoid — it’s about making sure your claim stands up if it’s challenged. Gather:

1. Original invoices with clear descriptions of work completed
2. Contracts or quotes showing scope and agreed price
3. Site photos or progress records
4. Email chains confirming variations or additional work
5. Any evidence of payment milestones or schedules discussed
6. Proof of delivery (email confirmations, delivery dockets, site sign-offs)

If the head contractor or builder signed off on the work — even informally — keep that evidence. If they photographed it, inspected it, or paid for other follow-up trades, that’s proof the work was accepted. Adjudicators are practical people. They’ve seen construction sites. They know when work has been done.

Know What a Payment Claim Actually Does (and Doesn’t)

Here’s where the law gets useful. Under your state’s SOP legislation, a formal payment claim isn’t just another email. It’s a legal document that triggers statutory obligations on the other party. They must respond, and they have limited time to do it.

What a payment claim does:

• Forces the other party to decide: pay, pay part of it, or reject it formally
• Sets a hard clock running (usually 10 business days in most states)
• Creates a pathway to fast-track adjudication if they ignore it or dodge it
• Puts the burden on them to explain why they won’t pay — not on you to prove why they should

What it doesn’t do: it doesn’t automatically put money in your bank account. It doesn’t force a judge to order payment (though adjudication can). It’s a lever, not a magic wand.

Many debtors choose to pay or settle rather than face fast-track adjudication, because adjudication is faster, cheaper, and more stressful than just paying. But you need to actually lodge the claim for that to happen.

Lodge Your Claim the Right Way

Here’s where waterproofers often get stuck: the SOP legislation is precise about what a payment claim needs to contain. It varies by state, but typically includes:

• Identification of the work done and the contract it relates to
• The amount claimed
• Payment terms (due date or when you expect payment)
• Who it’s addressed to (the head contractor, builder, or other party owing you money)

The format and detail matter. A sloppy claim can be rejected on technical grounds, which wastes your time and delays payment further. It’s also easy to get wrong if you’re doing it while running a site and answering phone calls.

You can file a payment claim yourself (it’s straightforward if you know your state’s rules), or use a service to handle the paperwork and make sure it meets the statutory requirements. At PayClaim, we automate this for a flat $79 fee — no hidden costs, no percentage cuts. You lodge, we format it correctly for your state, you serve it.

The key is to lodge the claim within any contractual timeframes (check your contract), keep a record of when you served it, and know exactly when the other party’s response deadline is.

What Happens Next: The Clock Starts

Once you’ve lodged your claim correctly, the other party has a set number of days to respond (10 business days in NSW, for example). They can:

• Pay the full amount. This is the outcome you want.
• Issue a payment schedule setting out what they’ll pay, when, and why they’re withholding the rest (if they are). You then have the right to check if that’s fair.
• Reject the claim entirely with a written response explaining why. If you disagree, you can escalate to adjudication.
• Ignore it. This is actually worse for them — if they don’t respond at all, you can move to adjudication without any further negotiation.

If you’re not happy with their response, or if they don’t respond, you can lodge an adjudication application. That’s a faster, cheaper alternative to court, and the adjudicator decides within 10 business days (in most states). Their decision is binding unless either party takes it to court afterwards — which is expensive and rare.

Don’t Sit On It

The window for lodging a claim is limited. Most SOP Acts require you to lodge within a set period of the work being done or the invoice being issued — usually 12 months, sometimes less. After that, you lose your statutory right to fast-track adjudication. You can still chase the debt, but you’ll need a lawyer and court, which costs time and money.

If an invoice is unpaid and you’ve given the other party a reasonable chance to pay (say, past the agreed due date plus 14 days), lodge your claim now. There’s no penalty for doing it, and it shifts the burden of proving why they shouldn’t pay entirely onto them.

Waterproofing is skilled, essential work. You deserve to be paid for it. The Security of Payment legislation exists to make sure you are. Use it.