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

Variation margin impact

Check whether a variation improves project margin, leaves it unchanged or adds cost that is not fully recovered from the client.

Current contract valueCurrent forecast final costVariation costUse a negative value for a cost credit.Markup on cost %Chargeable to client?

Your result

Variation client value

$12,000

Variation contribution to margin

$2,000

Current forecast margin

$33,890

New forecast margin

$35,890

New forecast margin %

4.0%

Margin movement

$2,000

How it is calculated: For a positive chargeable variation, client value = variation cost plus markup. The new contract value and forecast final cost are then used to recalculate project margin.

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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