The Queensland regulator now lists fixed price exposure among the signals it watches for builder stress. Queensland house construction prices rose 8.0 per cent in a year, and contracts signed before that rise carry the old price.
The Queensland Building and Construction Commission has put fixed price contracts on its watch list.
In new guidance released this week, the regulator said its regulatory intelligence identifies fixed price contract exposure and builder viability as significant industry risks. It singled out cases where costs keep rising after the contract is signed.
It is a pointed message about a contract the regulator itself calls a common feature of residential construction.
What did the QBCC say about fixed price contracts?
The guidance is not a warning against fixed price work.
The problem it names is what happens when the market moves after signing. Labour, materials, freight, insurance and subcontractor costs can all shift during a build. Once a fixed price is locked in, the QBCC says builders may have limited options to recover increases that are outside their control.
Over time, that erodes margins and puts pressure on cash flow and business sustainability.
The guidance sets out what it considers relevant before a price is agreed. That covers the length of the build, current market conditions, subcontractor availability, material lead times, site risks and the contract’s delay and variation clauses. It notes that longer builds are generally more exposed than shorter jobs.
Why is the regulator watching this now?
The guidance follows the QBCC’s first annual regulatory intelligence trends report, covering the 2025 to 2026 financial year, which the regulator summarised in August.
That summary listed the indicators the QBCC monitors for early signs of viability concerns among its licensees. Fixed price contract exposure sits on that list alongside project delays or pauses, contract repricing, staged project delivery, payment delays, significant contract variations and subcontractor withdrawals.
So this is more than an education piece. It is a signal the regulator says it is tracking.
The QBCC has not said what action, if any, follows a licensee showing these signs. It has said the intelligence helps it decide where guidance, early intervention or regulatory attention may be needed.
How fast are Queensland building costs rising?
The latest Producer Price Indexes from the Australian Bureau of Statistics show why the timing matters.
In the June quarter 2026, the prices Queensland house builders charge rose 3.1 per cent. Over the year they rose 8.0 per cent. Nationally, house construction prices rose 2.0 per cent in the quarter and 5.9 per cent over the year, the largest annual rise since the June quarter 2023.
Materials moved too. Input prices for house construction in Brisbane rose 2.3 per cent in the quarter and 4.4 per cent over the year, with plaster products up 7.7 per cent in the quarter.
The ABS put much of the quarter down to fuel and freight after the closure of the Strait of Hormuz. Road freight prices rose 15.5 per cent in the quarter, the largest rise since that series began in 1997. The ABS also pointed to ongoing shortages of bricklayers, carpenters and concreters.
The price on a fixed price contract is set once. The costs underneath it are not.
The output index measures what builders charge on the work they are pricing now. A contract signed twelve months ago carries last year’s price. Where costs have run ahead since signing, the difference comes out of the builder’s margin.
That gap is the exposure the QBCC is describing. The next update lands on 30 October, when the ABS releases the September quarter figures.
Can a Queensland builder pass cost rises on under a fixed price contract?
Generally, only where the contract allows it.
The QBCC has already set out its view from the home owner’s side. In a public warning, it said there may be no contractual basis for contractors to demand payment for increased labour and material costs as variations under a fixed price contract. It added that this could be a breach of contract, which could allow the owner to terminate and lodge a home warranty claim.
Variations themselves carry strict rules in Queensland. The QBCC says a variation must be put to the home owner in writing, and the owner must agree to it in writing, before the variation work starts. A builder cannot require payment for a variation before that work begins.
Read together, the two positions point the same way. The protection a builder has against rising costs is largely whatever was written into the construction contract at signing.
How does Victoria handle cost escalation?
Victoria has taken a different route, at least for larger jobs.
The Domestic Building Contracts Amendment Act 2025 passed the Victorian Parliament on 11 September 2025. Consumer Affairs Victoria says it allows cost escalation clauses in contracts worth $1 million or more, capped at 5 per cent of the contract price.
The Victorian Government’s consultation page says commencement of the Act has been deferred to 31 March 2027.
Below that threshold, the cost risk on a fixed price job in Victoria still sits with the builder. One Melbourne builder we covered recently holds the fixed price back until final drawings and engineering are complete.
What warning signs does the QBCC point to?
The guidance lists the signs it sees as worth noticing early. They are ongoing project delays, increasing variation disputes, shrinking profit margins, pressure on subcontractor payments and difficulty securing future work.
Those overlap closely with the indicators the regulator says it monitors across its licensees.
The QBCC also links documentation to dispute risk. It lists detailed scopes of work, documented assumptions, written variation requests and records of client approvals as the material that helps if issues arise later.
Cash flow sits underneath all of it. The guidance describes regular budget reviews and close attention to outstanding payments as the way pressure is picked up before it becomes a business risk.
Fixed price contract exposure
Fixed price contract exposure is the gap between the costs a builder allowed for when it agreed a fixed price and the costs it pays during the build, where the contract gives no way to recover the difference. The exposure grows with the length of the build and the speed at which labour, materials and freight costs rise after signing.
The Good Builder Take
A fixed price is one of the strongest promises a builder makes to a client. It is a big part of how trust is built.
What the QBCC has done is put a time stamp on that promise. A fixed price agreed in a stable market and a fixed price agreed ahead of a 15.5 per cent quarterly jump in road freight carry very different risk, even if the paperwork looks the same.
The useful question is not whether to offer a fixed price. It is how long a price is being held, and what has been written down about the assumptions behind it.
The regulator now treats those answers as signals of viability.
Frequently asked questions
No. The QBCC describes fixed price contracts as a common feature of residential construction. Its guidance focuses on the risk when costs rise after a contract is signed and the contract gives limited ways to recover them.
Yes. In August 2026 the QBCC listed fixed price contract exposure among the indicators it monitors for early signs of viability concerns among licensees, alongside project delays, payment delays, contract repricing and subcontractor withdrawals.
The QBCC has warned home owners there may be no contractual basis for demanding payment for increased labour and material costs as variations under a fixed price contract. Variations must be agreed in writing before the work starts, and payment cannot be required before the variation work begins.
ABS Producer Price Indexes show Queensland house construction prices rose 3.1 per cent in the June quarter 2026 and 8.0 per cent over the year. Nationally the rise was 5.9 per cent over the year.
Under Victoria’s Domestic Building Contracts Amendment Act 2025, cost escalation clauses are allowed in contracts of $1 million or more, capped at 5 per cent. The Victorian Government says commencement has been deferred to 31 March 2027.
Related articles
- Australian Construction Industry Trends Guide
- More Queensland Home Warranty Claims Were Declined Than Approved. Missed Deadlines Are Part of Why
Last updated 20 October 2026. Price data from ABS Producer Price Indexes, June quarter 2026, released 31 July 2026. September quarter data is due 30 October 2026.
General Information Only. This article provides general information only and does not constitute legal, financial or professional advice. Builders should seek independent advice about their own contracts and circumstances.
Author: TGB Editorial
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