For years, builders signed fixed-price contracts and simply wore it when material prices jumped mid-project. Then costs surged, margins vanished, and that quiet acceptance became one of the biggest drivers of construction insolvencies. In 2026, rise and fall clauses are back on the table — contract provisions that adjust the price when costs change, sharing the risk of cost movements rather than dumping it all on the builder. Understanding them has become essential for anyone pricing longer construction work.
This guide explains what rise and fall clauses are, why they’re returning now, how they work, and the mistakes to avoid — written in plain terms for Australian builders, subcontractors and their clients. It’s general information, not legal advice, and terms vary by contract and state.
WHAT ARE RISE AND FALL CLAUSES?
A rise and fall clause — also called a price escalation or cost adjustment clause — is a contract provision that allows the contract price to be adjusted if certain costs rise or fall during the project. If key material or labour costs move beyond an agreed point, the price changes to reflect it.
The purpose is to share cost risk fairly. Rather than the builder carrying the entire danger of prices moving during a long job, a rise and fall clause spreads that risk between the parties, which is what makes pricing longer projects viable.
WHY THEY’RE RETURNING IN 2026
Rise and fall clauses fell out of fashion during years of stable prices, but the recent cost surge changed everything. Material costs rose sharply and unpredictably, and builders locked into fixed prices on long jobs were left absorbing increases that wiped out their margins — a major factor in the wave of construction insolvencies.
The industry is adjusting in response. In 2026, some principals are accepting rise and fall clauses on new contracts, some government agencies are engaging on cost sharing, and some contractors are refusing to price long jobs at all without an escalation mechanism. The structural conditions that caused the damage haven’t gone away, so the protection is back in demand.
HOW RISE AND FALL CLAUSES WORK
The mechanics vary, but most rise and fall clauses share common elements:
- What’s covered — the specific costs subject to adjustment, such as nominated materials, fuel or labour.
- The trigger — how much a cost must move before an adjustment applies, often beyond a threshold.
- The measure — how the change is calculated, sometimes against a published index or documented cost.
- The direction — genuine clauses adjust both ways, so the price can fall as well as rise.
Because the detail determines who carries what, the wording of a rise and fall clause matters enormously and deserves careful reading before signing.
HOW TO APPROACH RISE AND FALL
1. Assess the risk on longer jobs
The longer the project, the more exposed you are to cost movements. Rise and fall clauses matter most on jobs that span many months.
2. Be specific about what’s covered
Nominate exactly which costs adjust and how, rather than leaving it vague. A clear rise and fall clause prevents arguments later.
3. Tie it to something objective
Where possible, base adjustments on a published index or documented evidence rather than opinion. Objectivity makes the clause workable and fair.
4. Explain it to your client
Help clients understand that a rise and fall clause protects both sides and can beat a fixed price padded heavily with contingency. Communication prevents mistrust.
RISE AND FALL VS A PADDED FIXED PRICE
The alternative to a rise and fall clause on a risky long job is a fixed price loaded with contingency — and that’s often worse for everyone. To carry the risk of unknown cost rises, a builder pricing a fixed contract has to add a margin for that uncertainty, which the client pays whether or not costs actually rise. If prices stay flat, the client has overpaid for risk that never eventuated; if they surge past the contingency, the builder still loses. A well-drafted rise and fall clause avoids both traps by adjusting to what actually happens: the client pays the real cost movement rather than a guess, and the builder isn’t gambling their margin on price forecasts. Framed this way, escalation clauses are often fairer to clients than the fixed prices they instinctively prefer.
WHAT THEY MEAN FOR CLIENTS
Clients often resist rise and fall clauses because they want price certainty, which is understandable. But on a long project in a volatile cost environment, absolute certainty is partly an illusion — it’s really just a builder’s best guess plus a risk margin. A rise and fall clause trades a little of that apparent certainty for a fairer deal, where the client pays for actual cost movements rather than a padded estimate, and gets a builder who isn’t tempted to cut corners to protect a margin under pressure. The key for clients is to insist the clause works both ways, is tied to objective measures, and is clearly explained, so it’s a genuine risk-sharing mechanism rather than a one-way door.
COMMON RISE AND FALL MISTAKES TO AVOID
- Fixed-pricing long, volatile jobs. Absorbing all cost risk on a long project is what wiped out many builders’ margins.
- Vague clauses. Poorly worded escalation provisions cause disputes instead of preventing them.
- Subjective triggers. Adjustments based on opinion rather than evidence invite argument.
- Not explaining it to clients. A clause the client doesn’t understand breeds mistrust when it’s used.
Pricing and contract risk are exactly where ACS Consulting helps. The Construction Estimation & Cost Consultancy service helps you assess cost-movement risk and price long jobs with or without escalation, while the Strategy & Business Planning service treats cost volatility as a business risk to manage, and the SME Data Analysis & Power BI service tracks material costs against your estimates. The free Perth SME Operational Audit Checklist helps you tighten your commercial controls. For guidance, Master Builders Australia, the Australian Government’s contracts and tenders resources, and the Australian Institute of Quantity Surveyors are useful references. Contract terms and law vary by state, so get advice on your specific contract.
FREQUENTLY ASKED QUESTIONS
What is a rise and fall clause?
A rise and fall clause, also called a price escalation or cost adjustment clause, lets the contract price be adjusted if certain costs rise or fall during a project. It shares cost-movement risk between builder and client rather than the builder carrying it all.
Why are rise and fall clauses coming back?
Because the recent surge in material costs left builders on fixed-price long jobs absorbing increases that destroyed their margins, contributing to widespread insolvencies. In 2026 some principals and agencies are accepting cost sharing, and some contractors won’t price long jobs without it.
How does a rise and fall clause work?
It specifies which costs are subject to adjustment, the trigger for when an adjustment applies, how the change is measured (often against a published index), and the direction. Genuine clauses work both ways, so the price can fall as well as rise.
Are rise and fall clauses fair to clients?
Often fairer than a fixed price padded with contingency. With a fixed price the client pays a risk margin whether or not costs rise; a well-drafted rise and fall clause means they pay actual cost movements instead, provided it’s two-way, objective and clearly explained.
CONCLUSION
Rise and fall clauses share the risk of cost movements rather than dumping it entirely on the builder, and after years of damage from fixed-pricing volatile jobs they’re back in demand in 2026. Assess the risk on longer jobs, be specific about what’s covered, tie adjustments to objective measures, and explain the clause to your client.
Understand rise and fall clauses and you can price long projects without gambling your margin on cost forecasts — protecting your business while offering clients a genuinely fairer deal. As contract law varies by state, get advice on anything significant.
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