Subcontract Clauses That Protect You From Slow Payers

If you’re a tradie or subcontractor working on Australian building sites, you already know the drill: you do the work, invoice on time, and then wait. Sometimes you wait weeks. Sometimes months. A slow-paying head contractor or builder can cripple your cash flow and force you to dip into your own pocket to keep the job moving.

The good news is that the contract itself can work for you. The right clauses in your subcontract can set clearer expectations, reduce disputes, and give you stronger legal footing if payment doesn’t arrive on time. Let’s walk through the clauses that actually matter.

Payment Terms That Work in Your Favour

Start with the basics: spell out your payment terms in writing before you pick up a tool. Vague agreements lead to vague payment dates, which lead to arguments about what was “agreed.”

Here’s what to include:

1. Invoice date and payment due date (e.g., “payment due 7 days from invoice date”)
2. Late payment interest (e.g., “interest accrues at 10% per annum on overdue invoices”)
3. Who issues invoices and in what format
4. The exact payment method (bank transfer, cheque, etc.)
5. A dispute resolution process before payment is withheld

The tighter your payment terms, the clearer the expectation. “Payment on completion” is weak. “Payment within 5 business days of invoice, due on the 15th of the following month” is strong. The head contractor can’t claim confusion about when money is due.

And add this: include a clause that ties your work to payment. If they don’t pay, you reserve the right to stop work on their project. This isn’t a threat—it’s a contractual safeguard that gives you leverage if cash stops flowing.

Progress Claims and Statutory Rights

Australia’s Security of Payment legislation exists precisely because slow payment is a chronic problem in construction. Most states have their own version: NSW has the Security of Payment Act 1999, Victoria has the Building and Construction Industry Security of Payment Act 2002, Queensland has the Building Industry Fairness (Security of Payment) Act 2017, and so on.

Your contract should reference these Acts and confirm that progress claims are issued under them. This matters because:

• Statutory claims follow strict timelines (e.g., 10 business days to issue a payment schedule under the NSW Act)
• They lock in what’s owed on a specific date—no moving goalposts
• If the head contractor doesn’t respond properly, you can escalate to fast-track adjudication
• The respondent has to act within defined deadlines or they lose rights

Make sure your subcontract explicitly states that you’ll be issuing progress claims under your state’s Security of Payment legislation. This signals to the head contractor that you know your legal rights and you’re serious about getting paid on time. It also means when you file a payment claim, you’re operating within a framework the law already recognises.

Withholding and Deduction Clauses Work Both Ways

Head contractors often include clauses allowing them to withhold payment for defects, incomplete work, or “variations in scope.” That’s standard, but it cuts both ways. Your contract should say:

They can only withhold payment if they follow a formal process: give you written notice of what’s wrong, specify the cost to fix it, and allow you a reasonable time to remedy it. Vague withholding (“we’re holding 10% because of quality issues”) is not enforceable.

Retention amounts should be capped: e.g., “5% retention, released 30 days after practical completion.” Open-ended retention is a cash trap.

You get paid on your schedule if they breach payment terms: If they don’t pay by the due date without a valid dispute, your contract should state you can issue a statutory notice and escalate to adjudication. Don’t rely on goodwill.

Dispute Resolution That Favours Speed

Include a straightforward dispute process before things get legal:

Step 1: Either party can issue a written notice of dispute within 5 business days of the disputed invoice, specifying what’s wrong.

Step 2: The parties must meet within 5 business days to discuss it in good faith.

Step 3: If unresolved, either party can issue a statutory payment claim under the relevant Security of Payment legislation.

This buys you time but also shows the head contractor you’re organised and serious. Many disputes get resolved once people actually sit down and talk. The ones that don’t can move straight into the statutory process, which has hard deadlines and no grey areas.

What to Do Right Now

If you’re already working under a contract without these clauses, it’s not too late. For future work, insist on written terms that include:

• Clear payment dates tied to invoices
• Late payment interest
• A right to stop work if payment is overdue
• Reference to Security of Payment legislation
• Capped retention with release dates
• A dispute resolution process with a deadline

If you’re already owed money and the contract is silent or vague, you still have legal rights. Each state’s Security of Payment Act allows you to issue a payment claim even if the original contract doesn’t mention it. The legislation backstops slow payers.

Get those clauses locked in now, and if payment still doesn’t arrive on time, you’ll have clear contractual language to back you up when you escalate. Good contracts don’t prevent disputes—but they do make them much faster and cheaper to resolve.