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Construction Cost Crisis — Blaze Business & Legal
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Construction Cost Crisis — Australia 2026

Rising Construction Costs Are
Compressing Your Margin on Every Live Project

Fuel, materials, labour and finance costs are rising simultaneously. Most construction contracts provide no automatic protection. This section sets out what is happening, what your contract rights are, and what you can do about it.

The combined impact across six cost inputs is running at 7 to 7.5 percentage points of margin on active projects priced in 2024 and earlier. A business that tendered at 15% gross margin is likely earning 7% to 8% today. On a 10% margin contract, that business may be working at a loss. — Shannon Drew, Management Accountant and Fractional CFO, Blaze Business & Legal
67% Diesel price rise since 2022 baseline
36% PVC and HDPE pipe increases
26% Construction sector of all insolvencies
8-step System for cost recovery on live projects

The construction cost problem in 2026 is not a single event. It is six simultaneous cost pressures arriving at the same time, hitting a supply chain that operates predominantly on fixed-price contracts with no mechanism to pass those costs on.

Most construction contracts lock in the price at tender. The contractor carries all cost risk between the tender date and the date of completion, except where the contract specifically provides otherwise. In a stable cost environment, that is workable. In 2026, it is not.

This section of the Blaze Business & Legal website covers every dimension of the problem: what is driving costs, what your contract says about it, what options are available when the contract offers limited protection, and how to approach the conversation with your principal. The full 8-step response system is on the pillar page below.

What Is Driving Construction Cost Increases in 2026

Each of these inputs is rising independently. The combined effect is two to three times the diesel number alone, and it is landing on every active fixed-price project simultaneously.

+67%
Diesel & Fuel
Every piece of plant, every delivery vehicle, every generator. Priced at 2022 rates on projects delivering in 2026.
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+27–36%
Petroleum Materials
PVC, HDPE, bitumen, insulation, sealants. All petroleum derivatives. All moving with global fuel prices.
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Elevated
Freight & Logistics
Surcharges have not retreated to pre-2020 levels. Regional and imported material supply chains carry ongoing freight cost pressure.
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+11.5%
Labour & Super
Superannuation at 11.5%, up from 9.5% in 2020. Skills shortage driving wage pressure across every trade category.
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4.35%
Finance Costs
Equipment financed at 2% is now serviced at 6%+. Every dollar of project-related debt is now more expensive.
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3.2%+ CPI
Overhead Cost Base
Rent, insurance, professional services. Cumulative inflation over three years is significant and rarely repriced into project margins.

The combined impact: Shannon Drew's financial analysis of the six inputs across a representative project portfolio finds that the aggregate additional uncontracted cost on a $15 million project with $6 million of remaining scope is typically $280,000 to $390,000 — that is 4.7% to 6.5% of remaining contract value coming directly out of margin. Read the full analysis: Construction Cost Analysis 2026 →

The 8-Step System for Recovering Cost Increases on Live Projects

If your project is losing margin to cost increases you did not price, the pillar page below works through the eight steps in order: from understanding your contract position to making a formal claim, having the commercial conversation with your principal, and protecting the business while the project is still running.

Pillar page — full 8-step system

Rising Construction Costs Australia: The 8-Step Response System

The complete guide to identifying your contract rights, calculating your real cost position, serving correct notices, making a formal claim, negotiating with your principal, and protecting your business from the insolvency risk that follows unrecovered losses.

Step 1 Calculate your real cost position Step 2 Audit your contract rights Step 3 Know what you can actually claim Step 4 Serve the correct notices Step 5 Prepare your claim documentation Step 6 Approach your principal Step 7 Formalise any agreement Step 8 Protect the business going forward
Read the full 8-step system

Every Dimension of the Problem, Covered in Full

Each article below covers one specific aspect of the construction cost crisis in depth. The pillar page gives you the system. These articles give you the detail on each component.

Cost analysis
Fuel and Input Costs in Australian Construction 2026
What the six cost inputs are doing, what the numbers show, and why the combined effect is materially worse than any individual increase in isolation.
Read article
Financial analysis — Shannon Drew
The Real Cost of the 2026 Construction Crisis
Shannon Drew's full financial modelling of the six cost inputs, with the Mitchell Harris scenario tracking $346,000+ in uncontracted costs across a live project portfolio.
Read article
Contract rights
Rise and Fall Clauses in Australian Construction Contracts
What these clauses say, how to find them, how they work in practice, and what to do when the clause does not fully cover your exposure.
Read article
Contract rights
Force Majeure and the Fuel Crisis: The Honest Analysis
Why force majeure rarely covers price increases, when it might, what the realistic alternative pathways are, and what to do if a claim has already been rejected.
Read article
Notice obligations
Notice Obligations for Cost Increase Claims
What to give notice of, by when, and in what form. Covers AS 4000, AS 4300, AS 2124, NEC4, GC21, and subcontracts. Deadlines may already be running.
Read article
No contract protection
Fixed Price Contract, No Rise and Fall Clause: Your Options
The five realistic options when your contract provides no automatic cost protection, from commercial negotiation to contract frustration and business restructure.
Read article
Subcontractors
Security of Payment and Fuel Cost Claims
When you can and cannot use security of payment legislation to recover cost increases. The BIF Act in Queensland, interstate variations, and how to structure a valid claim.
Read article
Government contracts
Government Construction Contracts and Cost Recovery
Commonwealth procurement policy, Queensland government guidance, GC21 Schedule 7, and DHA contracts. How to structure the approach to a government principal.
Read article
Commercial strategy
What Your Principal Is Thinking About Your Cost Claim
What principals are worried about, what makes them reject claims, and how to frame the conversation so they can say yes. From someone who has been on both sides.
Read article
Insolvency risk
Why Construction Businesses Are Going Broke in 2026
The structural causes of construction insolvency, the warning signs, and when director obligations under the Corporations Act begin to apply. Act before it becomes critical.
Read article

Construction Cost Crisis Services

I work with construction businesses across Queensland and nationally on contract rights, cost recovery claims, and the financial analysis that underpins them. These are fixed-fee services with clear scope.

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Contract Audit and Cost Recovery Advice
Review of your specific contracts against your current cost position. Written advice identifying your entitlements, notice obligations, and the options available. Fixed fee, scoped on engagement.
Enquire
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Project Financial Analysis — Shannon Drew
Full modelling of the six cost inputs across your active project portfolio. A documented analysis suitable for use in a formal variation claim or commercial negotiation. Provided by Shannon Drew, Management Accountant and Fractional CFO.
Enquire
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Fuel Crisis Advisory Package
Integrated legal and financial advisory covering contract review, cost analysis, claim preparation, and negotiation strategy. Rachelle Hare and Shannon Drew working together on your specific position. Scoped on engagement.
Enquire
Ready to understand your position and options?

Written by People Who Have Been Inside the Industry

Rachelle Hare, Managing Director, Blaze Business & Legal
Rachelle Hare
Managing Director and Principal, Blaze Business & Legal

Construction lawyer with 25 years of experience, including in-house roles at Thiess, Laing O'Rourke, Acciona, and DHA. Rachelle has advised on construction contracts, claims, and major projects across Australia.

SD
Shannon Drew
Management Accountant and Fractional CFO, Blaze Business & Legal

Management Accountant and Fractional CFO with 25 years of experience in the construction industry. Shannon provides project financial modelling, cost analysis, and fractional CFO services to construction businesses across Australia.