A small payment discount can remove a large share of the job margin

Five per cent can sound harmless

A debtor offers to pay promptly if you reduce the invoice by a small percentage. The percentage sounds modest against the sales figure. Compare the dollar reduction with what the job was expected to contribute after its costs. That does not decide the settlement question, but it makes the commercial effect clearer before urgency drives the answer.

Use a consistent accounting basis

Start with the relevant revenue and job costs, using a consistent treatment of GST and other items with your accountant. Separate the disputed account from unrelated work. Do not compare an invoice including tax with a cost figure excluding it and call the difference profit. Identify the particular contribution measure being used rather than claiming it represents final business profit.

Understand the cost behind the sale

Business.gov.au's pricing guidance includes relevant supply costs when calculating a price. Bring those actual job costs into this review. A sales discount reduces the amount received, while most completed-job costs may already have been incurred. The useful exercise is to show the dollar impact clearly, not assume a small percentage of turnover is automatically an affordable concession.

Source: business.gov.au: Choose a pricing strategy

Test a simple example

Imagine a hypothetical job with $20,000 revenue and $17,000 of identified costs, both on the same tax basis. Its contribution before other costs is $3,000. A $1,000 reduction removes one third of that contribution, although it is only five per cent of revenue. The example measures the concession; it does not establish what could be recovered through another route.

Keep the recovery choice separate

An accurate margin calculation does not guarantee full collection if you refuse. Consider realistic recovery costs, delay and uncertainty with appropriate advice. Conversely, pressure to meet a bill does not make every discount sensible. Ask what the payment proposal actually offers and have significant settlement wording checked before accepting a reduced amount as a final resolution.

Record the commercial reason

Keep the calculation with the decision and the agreed terms if a settlement proceeds. If the discount reveals that the original price left little room, review future quoting separately. Do not try to repair an old estimate by assuming a debtor must accept your preferred outcome. The goal is an informed concession, with its cost understood and its terms deliberately assessed.