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Construction Business

Fixed-Price Contracts Are Killing Australian Builders

22 May 2026 6 min read
Fixed-Price Contracts Are Killing Australian Builders

Material costs up 30%. Labour shortages biting. Supply chains broken. And builders legally locked into prices they quoted two years ago. This is the crisis nobody warned you about, and it's getting worse.

3,596
Construction insolvencies in 2025 (ASIC)
2x+
Rise in failures since 2022
+36%
Polyethylene price hike (Iplex, 2025)

You quoted the job carefully. The client signed. You felt good about it. Then six weeks later a letter arrived from your supplier, price increase, effective immediately. And you're locked in. Every cent of that increase is yours to absorb. This is happening to Australian builders right now, and the wave is not over.

Australia's construction industry has just lived through its worst insolvency wave since the 1990s. In 2022, 1,793 construction firms entered external administration. By 2025 that number reached 3,596, more than double in three years.

The perfect storm

  • Material costs surging, a base already 35% above 2019 levels, with global conflict driving commodities higher.
  • Labour shortages, a 300,000-worker shortfall projected by 2027, wages rising across every trade.
  • Rising interest rates, variable-rate debt costing materially more than 12 months ago.
  • Supply chain delays, late deliveries trigger penalties, all absorbed by the builder under a fixed-price contract.

Fixed-price contracts were never designed for a market moving this fast. Major supplier Iplex has already notified builders of increases: PVC products +27%, polyethylene +36%, polypropylene +31%. The builders who survive are the ones getting their estimating and contracts right, before they sign.

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