The cost is real. Can you explain what caused it?

The invoice proves spending, but not the whole claim

Suppose you hired an extra machine after a site access problem. The hire invoice is genuine, and the expense hurt. The customer asks why that particular charge should form part of your claim against it.

Start with the sequence that connects the problem to the spending. A cost record can establish an amount while leaving the reason, contractual responsibility and available alternatives unresolved.

Identify the event precisely

Describe the access problem, when it occurred and which planned activity it affected. Keep the relevant instruction, diary entry or notice alongside the description. Avoid combining several weeks of general frustration into one undated event.

Note any other reason the machine was needed. If part of the hire served ordinary contracted work, keep that visible rather than describing the entire invoice as an additional cost caused by the access problem.

Show the decision behind the spending

Record what the business decided to do, who approved it and what information was available then. Explain the practical purpose: for example, moving materials through a different access point.

Do not invent a claim that the choice was the only possible option. If another option was considered, keep its estimated cost and constraints. Your adviser can assess which facts matter to the claim and the contract.

Reconcile the amount to the records

Match the hire period, delivery charges and any credits with the invoice and payment records. business.gov.au lists expenses and bank transactions among the records businesses need to retain.

Keep the cost calculation consistent. If the same machine expense is included in a quoted variation, do not also add it as a separate loss without explaining the distinction. Separate incurred spending from a forecast of further hire.

Source: business.gov.au: Record keeping

Check the basis for seeking payment

Put the contract, instructions and relevant correspondence beside the calculation. Ask an adviser whether the records support the entitlement being asserted and whether any notice requirements need attention.

Do not assume that a genuine expense must be paid by the other party. Equally, do not discard a concern solely because it has not yet been neatly calculated. The task is to identify what can be supported and what needs assessment.

Give the other side a question it can answer

Present the event, response and calculation clearly. Ask whether the disagreement concerns the event, the spending, the amount or responsibility. A specific answer can narrow the next discussion.

If the issue remains unresolved, bring that explanation to CRP through Report a Dispute below. Include the underlying records and any formal notice. The goal is a more assessable claim, not a promise that documenting a cost guarantees recovery.