Progress Claim Calculator
Work out your next progress claim from the contract value, work completed, retention, and any payments already made.
General tool only. This calculator gives estimates based on the values you enter. Always check your contract terms and any state-specific rules before relying on the figures.
Select your state or territory
Using Australia-wide general calculation
General calculation applicable across Australia.
Include GST (10%)
Enter the cumulative work completed to date and any previously paid claims. Only approved variations should be included.
Results
Enter your claim details to calculate the next progress claim.
How it works
Behind the numbers
The calculator looks at how much work has been done in total, subtracts what you've already been paid, and applies retention and GST to the difference.
Formula
The maths, written out
Cumulative work = Contract × Complete% + Variations Gross claim = Cumulative − Previous paid Retention = Gross × Retention% Net + GST = (Gross − Retention) × (1 + GST%)
Worked example
A quick scenario
On a $420,000 contract that's 35% complete with $8,500 of approved variations and $105,000 already paid, the next gross claim is $50,500.
Frequently asked
Is this calculator free to use?
Yes. All calculators on Contractor Calc are free and do not require sign-up.
How accurate are the results?
The calculators use standard formulas. Results are estimates only and depend on the values you enter. Always check against your contract.
Can I export the results?
Most calculators include a download or copy-to-clipboard option for sharing with clients or storing in your records.