These tools provide general guidance only and do not replace legal, accounting, contract, or state-specific regulatory advice. Always confirm requirements for your contract, project, and location.
What our calculators are
Self-service tools that apply standard formulas to numbers you enter. They are useful for first-pass estimates, claim drafts, and sanity checks. They do not interpret your contract, your state's legislation, or your specific circumstances.
What they are not
- A substitute for a quantity surveyor, accountant or contracts lawyer.
- Authoritative on statutory deadlines — your contract or the relevant Act controls.
- A guarantee of payment, recovery, or any commercial outcome.
State-specific frameworks
Security of payment legislation differs across Australia. The state pages summarise the relevant Act for orientation only. Reference dates, response windows and adjudication timing depend on the wording of your contract and should be confirmed against the legislation or with a contracts adviser.
Get help
If you are dealing with a payment dispute, an unpaid claim, or a notice you don't understand, contact a contracts adviser, an industry association (Master Builders, HIA), or a community legal service. Don't rely on a calculator output as your sole basis for a formal step.