SOPA QLD: Your Rights as a Subcontractor Under the Building Industry Fairness Act

What is SOPA and Why Should You Care?

SOPA stands for Security of Payment. In Queensland, the relevant legislation is the Building Industry Fairness (Security of Payment) Act 2017 (BIF Act). It replaced the old Building and Construction Industry Payments Act 2004.

The whole point of SOPA is simple: if you do construction work, you have the right to be paid for it — quickly and without having to go to court. It creates a fast-track system for resolving payment disputes through adjudication, and it sets strict deadlines that builders must follow.

Before SOPA, subbies who didn't get paid had two options: cop it or lawyer up. Both were expensive. SOPA changed the game by giving subcontractors a statutory right to payment and a cheap, fast way to enforce it.

Who Does SOPA QLD Apply To?

The BIF Act applies to anyone who carries out construction work or supplies related goods and services under a construction contract in Queensland. That includes:

• Subcontractors (trades — sparkies, plumbers, chippies, ceiling fixers, the lot)
• Head contractors claiming against developers/principals
• Suppliers of building materials
• Consultants providing construction-related services (engineers, surveyors, etc.)

It does not apply to domestic building work where the owner is a resident (i.e., a homeowner getting their kitchen renovated and contracting directly with a tradie). However, if a builder subcontracts that work to you, the subcontract is covered.

Key Timelines You Need to Know

SOPA QLD runs on strict deadlines. Miss one and you could lose your rights for that claim period. Here's the timeline from start to finish:

1. Reference Date

This is the date from which you're entitled to make a payment claim. Your contract usually sets this (e.g., "the 25th of each month"). If the contract doesn't specify, the BIF Act provides a default: the last business day of each month.

2. Serving Your Payment Claim

You can serve a payment claim on or after the reference date for work done up to that date. There's no statutory deadline to serve it, but you should serve it promptly — delays only hurt your cash flow.

3. Builder's Payment Schedule — 15 Business Days

Once you serve a payment claim, the respondent (usually the builder) has 15 business days to provide a payment schedule. The payment schedule must state:

• The amount the builder proposes to pay (the "scheduled amount")
• If the scheduled amount is less than your claim, the reasons for each reduction

4. Payment Due Date — 5 Business Days After Schedule

The builder must pay the scheduled amount within 5 business days after providing the payment schedule (unless the contract specifies a different due date, but it can't be longer than what the Act allows).

5. No Payment Schedule? Full Amount is Due

This is the big one. If the builder fails to provide a payment schedule within 15 business days, the entire claimed amount becomes due. No arguments, no reductions. The builder has effectively accepted your claim by not responding.

6. Adjudication Application — Within Specific Windows

If you're unhappy with the payment schedule (or didn't get one), you can apply for adjudication. The timeframes depend on the situation:

Miss these windows and you lose your right to adjudicate that claim. You can still make a fresh claim for the next reference date, but the opportunity for that specific claim period is gone.

Step-by-Step: How to Use SOPA QLD

Right, let's get practical. Here's exactly how to use SOPA to get paid in Queensland.

Step 1: Check Your Contract

Before anything else, read your contract. Look for:

• The reference date (when you can claim)
• How the claim should be served (email, post, hand delivery)
• Any specific format requirements
• The payment terms

Even if the contract tries to limit your SOPA rights, the Act overrides most of those restrictions. You cannot contract out of SOPA in Queensland.

Step 2: Prepare Your Payment Claim

Your payment claim needs to include:

• Your business name and ABN
• The respondent's name (the builder/head contractor)
• A description of work completed and/or goods supplied
• The claimed amount, broken down by contract line items
• Any variations, listed separately with approval references
• A clear statement that it is a payment claim made under the Building Industry Fairness (Security of Payment) Act 2017

That last point is critical. Without the SOPA endorsement, it's just an invoice — and invoices don't trigger the statutory protections.

Step 3: Serve the Claim Properly

Serve the payment claim on or after the reference date. Acceptable methods of service in QLD include:

• Email (if the contract allows it or the party has previously communicated by email)
• Hand delivery
• Post to the respondent's ordinary place of business
• Leaving it at the respondent's registered office

Pro tip: Always use email and keep a copy. If it ever goes to adjudication, you'll need proof that the claim was served.

Step 4: Wait for the Payment Schedule

You've served your claim. Now the clock starts. The builder has 15 business days to respond with a payment schedule. Mark the deadline in your calendar — don't guess at it.

Step 5: Review the Payment Schedule (If You Get One)

If the builder responds, compare their payment schedule against your claim line by line. Check:

• Has every line item been addressed?
• Are the reasons for any reductions specific and valid?
• Have they included any back-charges or deductions you disagree with?
• Does the maths actually add up?

This comparison step is where most subbies lose money — not because the builder's reasons are valid, but because no one bothers to check. Small reductions across many line items add up to thousands of dollars.

Step 6: Apply for Adjudication (If Needed)

If you're not happy with the payment schedule — or never received one — you can apply for adjudication through an Adjudication Registry. In QLD, this is managed by the Queensland Building and Construction Commission (QBCC).

Your adjudication application should include:

1. A copy of your payment claim
2. A copy of the payment schedule (if one was provided)
3. A copy of your contract
4. Your submissions explaining why the claimed amount is correct
5. Supporting documents (photos, emails, delivery dockets, variation approvals)

The adjudicator will review everything and make a determination — usually within 10 to 15 business days. Their decision is binding on an interim basis, meaning the builder has to pay even if they intend to dispute it later in court.

Step 7: Enforce the Decision

If the builder still doesn't pay after adjudication, you can:

• File the adjudication certificate as a judgment debt in court
• Issue a statutory demand (if the respondent is a company)
• Suspend work (the BIF Act gives you the right to suspend work if an adjudicated amount is not paid within 5 business days)

Common Mistakes Subbies Make with SOPA QLD

I've seen tradies lose legitimate claims over avoidable errors. Here are the most common ones:

1. Not Endorsing the Claim Under SOPA

This is the number one mistake. You send a beautifully detailed invoice, but you forget to include the magic words: "This is a payment claim made under the Building Industry Fairness (Security of Payment) Act 2017." Without that statement, the statutory protections don't kick in. The builder can treat it as a regular invoice and ignore the deadlines.

2. Missing the Adjudication Window

You get a dodgy payment schedule, you're furious, you mean to do something about it... and then 30 business days pass. Once the adjudication window closes, it's gone for that claim. You can still claim for future periods, but that money is stuck in dispute limbo until you litigate — which is slower and more expensive.

3. Not Keeping Records

Adjudicators decide based on documents, not conversations. If you don't have it in writing — the variation approval, the site instruction, the delivery docket — it's your word against the builder's. And adjudicators aren't in the business of guessing. Keep every email, every text message, every photo.

4. Claiming Before the Reference Date

If your reference date is the 25th and you serve your claim on the 20th, it's invalid. The builder can argue it wasn't a valid payment claim, and the adjudicator might agree. Check your contract, count the days, and serve on or after — never before.

5. Not Comparing Payment Schedules

Builders don't always slash your claim by half — that'd be too obvious. Instead, they chip away. A few percent off this line, a rounding error there, a "quality issue" deduction here. Most subbies glance at the bottom number, grumble a bit, and move on. Over a $500K project, those "small" adjustments can cost you $20,000 to $50,000.

6. Ignoring the Right to Suspend Work

Under the BIF Act, if an adjudicated amount isn't paid within 5 business days, you have the right to suspend work after giving 2 business days' written notice. Many subbies don't know this — or are scared to use it. But it's a legitimate and powerful lever. Builders who know you'll exercise this right tend to pay faster.

SOPA QLD vs Other States

If you work across state borders, be aware that SOPA rules vary. QLD's system under the BIF Act has some unique features:

• Longer response time: QLD gives builders 15 business days to respond (vs 10 in NSW and VIC)
• QBCC as the registry: Unlike NSW where private Authorised Nominating Authorities handle adjudication, QLD centralises it through the QBCC
• Project trust accounts: For projects over $10 million (and head contractor trust accounts for projects over $1 million), the BIF Act requires trust accounts to protect subcontractor payments
• No "pay when paid" clauses: Any contract term that makes your payment contingent on the builder getting paid by the principal is void under the BIF Act

Project Trust Accounts in QLD

One of the standout features of the BIF Act is the project trust account system. This was introduced to stop the domino effect — where a developer doesn't pay the builder, so the builder doesn't pay the subbie.

Here's how it works:

• Projects over $10 million: The principal must establish a project trust account. All progress payments flow through this account, and the head contractor is the trustee with legal obligations to distribute payments to subbies.
• Projects over $1 million: The head contractor must hold a retention trust account, keeping your retention money separate from their operating funds.

This means your money is protected even if the builder goes bust. It's not sitting in their general account waiting to be swallowed by creditors — it's held in trust specifically for you and other subbies on the project.

How Much Does Adjudication Cost in QLD?

Adjudication through the QBCC is designed to be affordable. Here's a rough guide to costs:

The adjudicator's fees are on top of the application fee, but they're usually shared between the parties. Compared to litigation (where legal fees can easily hit $50,000+), adjudication is a bargain.

Take Control of Your Payment Rights

SOPA QLD exists because the government recognised that subcontractors were being squeezed — and that the construction industry doesn't work when subbies don't get paid. The BIF Act is on your side, but only if you use it properly.

The key is knowing the timelines, getting your paperwork right, and actually comparing what you claimed against what the builder is paying. That last part — the comparison — is where most money quietly disappears.

SubbieClaim was built specifically for this. Upload your builder's payment schedule, and our AI compares it against your progress claim line by line. It flags every discrepancy, calculates the total shortfall, and gives you clear evidence to back up your adjudication application or payment dispute.