Can you claim variations after practical completion?
Often yes, but the clock is running. Contracts set notice periods, and the security of payment law in each Australian state and territory limits how long you have to serve a payment claim. A late claim is hard. A claim built from good records is still possible.
Two clocks to check
The first clock is the contract. Many contracts require notice of a claim within a set number of days after you become aware of the event. Some contracts say a missed notice ends the right to claim.
The second clock is the law. Every Australian state and territory has its own security of payment law with its own time limits. For example, in Queensland the Building Industry Fairness (Security of Payment) Act 2017 sets limits on when a payment claim can be served.
What a retrospective claim needs
- The contract and all its amendments.
- The programme and any updates.
- Emails, letters, RFIs, site instructions and meeting notes.
- Daily diaries, timesheets and plant records.
- Quotes, invoices and subcontractor accounts.
From these we rebuild a timeline of what changed and when. Each change gets a cause, a clause and a cost.
What helps most
Speed. Records get lost, people leave and memories fade. Start the claim while the folders and the people still exist.
Honesty about gaps. A claim that says which costs are proven and which are estimated is easier to defend than one that hides the gap.
Related answers
Questions
Is there a deadline to claim after a job finishes?
Yes. Every Australian state and territory has its own security of payment law with its own time limits, and your contract sets limits too. Confirm the dates on your job early, because they can run from the date the work was last done.
What if I never gave notice?
Your position is weaker, but not always lost. It depends on the clause, the wording and what the other side knew at the time. Get advice quickly.
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