The hidden gap in your contract is where margins go missing

The danger is the gap between quote and contract

A quote can look safe on paper and still leave you exposed once the job starts. In a fast-moving market, the biggest problem is often the gap between what you priced and what the signed paperwork actually says. Business.gov.au notes that a quote becomes legally binding when accepted, so the wording matters for both sides. ([business.gov.au](https://business.gov.au/people/contractors/prepare-quotes?utm_source=openai))

That is why the first check is not whether the number feels right, but whether the quote, contract and payment terms all tell the same story. A written quote should include itemised costs, payment terms, work dates and a quote expiry date. If those basics do not line up, the margin can disappear before the first purchase order is raised. ([business.gov.au](https://business.gov.au/people/contractors/prepare-quotes?utm_source=openai))

Use one review clause that actually moves

For longer jobs, build in a clear fee review clause before you sign. Business.gov.au says a long-term contract can include a clause to review the fee if business costs increase. Keep the trigger simple: fuel, steel, timber or freight rise beyond an agreed point, and either party can request a written variation. ([business.gov.au](https://business.gov.au/people/contractors/prepare-a-contract?utm_source=openai))

Do not leave the clause vague. Spell out how the change is proposed, what evidence must be attached and who approves it. Business.gov.au says contract changes should be in writing, and all parties should sign and date them. That keeps the price adjustment tied to records, not memory or argument later on. ([business.gov.au](https://business.gov.au/people/contractors/prepare-a-contract?utm_source=openai))

Source: Official guidance

Shorten the quote window when timing is uncertain

A long quote validity period can quietly lock you into today's price for tomorrow's job. Business.gov.au says a written quote should show the quote expiry date, and if the customer accepts it, the quote becomes a binding contract. If the start date is uncertain, shorten the expiry so you are not carrying open-ended risk. ([business.gov.au](https://business.gov.au/people/contractors/prepare-quotes?utm_source=openai))

The same discipline applies to scope. List the work clearly, note any variations already discussed and make sure the payment terms are visible. If a client wants the quote held for longer, treat that as a fresh pricing decision, not a courtesy. A longer hold without a reset can turn your estimate into their protection and your loss. ([business.gov.au](https://business.gov.au/people/contractors/prepare-quotes?utm_source=openai))

Track materials before the next tender lands

You do not need a complex system to track price movements. Keep a simple register for fuel, steel, timber and any other high-cost inputs, with the supplier, date, quoted rate and expiry. Business.gov.au advises businesses to review prices at least once a year, or whenever costs or market conditions change. ([business.gov.au](https://business.gov.au/products-and-services/choose-a-pricing-strategy?utm_source=openai))

Use that register before every new tender and again before signing. If the allowance is already stale, reprice the job, narrow the scope or walk away. The point is not to predict the market perfectly. It is to stop a known increase from sitting inside a signed contract and showing up later as an argument. ([business.gov.au](https://business.gov.au/products-and-services/choose-a-pricing-strategy?utm_source=openai))

Review every contract before you sign

Before signature, compare the draft contract against the quote, the supplier assumptions and the variation process. Look for any clause that quietly changes the payment timing, removes a price review right or shifts extra cost risk back onto you. If the documents do not match, fix them before the job starts, not after the first invoice is disputed. ([business.gov.au](https://business.gov.au/people/contractors/prepare-a-contract?utm_source=openai))

This week, pick one live tender and pressure-test it against current material prices, then shorten the quote expiry and add a clear review clause if it is missing. If the paperwork still feels exposed, contact CRP today about dispute resolution. CRP coordinates independent qualified professionals and can help you tighten the file before you sign. This is general information only, not legal or financial advice. ([business.gov.au](https://business.gov.au/people/contractors/prepare-a-contract?utm_source=openai))