Free construction calculators

Check the commercial position before the problem gets expensive.

Use these free residential construction calculators to check margin, cost to complete, contingency and variation impact using your current project figures.

No account requiredAustralian dollar formatBuilt around residential construction

Construction contingency & risk allowance

Separate a general contingency allowance from risks you have already identified so the cost plan reflects both uncertainty and known exposure.

Base builder budgetContingency %Use this for general uncertainty rather than costs you already know are likely.Known commercial or project exposureInclude identified likely cost, pending exposure or specific risk allowances separately.

Your result

General contingency

$37,485

Known exposure

$20,000

Total risk allowance

$57,485

Cost plan including risk allowance

$807,185

Total risk allowance % of base budget

7.7%

How it is calculated: General contingency = base builder budget multiplied by the contingency %. Total risk allowance = general contingency plus known exposure.

Use the result as a commercial check, not a substitute for the project records.

The quality of the result depends on the figures entered. Keep actual costs, outstanding commitments, variation values and remaining allowances current so the forecast reflects the job as it stands today.

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