Product
Overview
The commercial operating system for construction. Capture a commercial event once, every downstream workflow stays connected.
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Contract models
Fixed, cost plus & open book
Claim a fixed sum, reimburse at actual cost, or bill fully open book. ClaimStack handles each, the right way.
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Solutions
Overview
Built for every side of the contract. One commercial record the whole project team can trust, head contract to supplier.
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For subcontractors
Free to collaborate
Invited to a project? Submit claims and variations in a format that holds up, free forever.
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Resources
Overview
Practical guides on claims, variations and contracts, plus how ClaimStack connects, who's behind it, and how we keep your commercial data safe.
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See it on your project
A 30-minute walkthrough on your numbers, where the margin usually leaks.
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Pricing
Product/Payment claims

Every claim, built the same way.

Progress claims and payment schedules that follow the live commercial position, SOP-compliant, cent-perfect, and never rebuilt from memory at month-end.

From a live commercial position to a compliant payment schedule, without the spreadsheet.

01 · Prepare

Build the claim from your live position.

Your cashflow forecast populates each line for the period, so the claim reflects where the job actually is, contract works and variations together. Attach supporting documents, and your insurances and licences attach automatically from your company library, flagged the moment one is expiring.

PC-0142 · New payment claim
July progress claim
Draft
Apply cashflow4 lines populated for Jul 2026
Preliminaries$42,000
Concrete structure$168,000
Structural steel$96,500
Facade & glazing$74,500
This claim (ex GST)$381,000
Attached from your library
Public Liability Insurance$20,000,000Current
Professional Indemnity$10,000,000Current
Workers CompensationCurrent
Builder's LicenceExpiring · 21d
Insurances & licences attach automaticallyFlagged before they expire
02 · Submit

Submit once, straight to the other party.

Lodge the claim and its PDF goes direct to whoever it is addressed to. From that moment both sides hold the same record, the amount, the line detail and the attachments, dated and delivered. No re-keying, no separate email.

PC-0142 · Submitted
July progress claim
Lodged
PDFPayment claim PC-0142.pdfDelivered
Claiming partyAssessing party
PreparedReconciled and ready28 Jul
LodgedSent to the assessing party31 Jul
ReceivedSame record, both sides31 Jul
Claimed $381,000+ GST $38,100
Claimed this period$419,100
03 · Assess

Assess line by line, respond with a schedule.

Certify or adjust each line with a reason, then issue a Security of Payments–compliant payment schedule in reply. Claimed and assessed reconcile to the cent, and the full trail is kept if a claim is ever disputed.

PC-0142 · Payment schedule
July progress claim
Scheduled
ScopeClaimedAssessed
Preliminaries$42,000$42,000
Concrete structure$168,000$168,000
Structural steelProgress behind claimed percentage$96,500$88,000−$8,500
Facade & glazingUnfixed materials on site excluded$74,500$61,000−$13,500
Subtotal (ex GST)$381,000$359,000
GST (10%)$38,100$35,900
Scheduled (inc GST)$419,100$394,900
Every adjustment carries a reason−$24,200 scheduled vs claimed
However you bill

Claim up, assess down.

Apply for your money from the party above you, and assess the claims that come from below. Either side, each contract bills the way it runs, a direct invoice or a full payment application.

Direct invoice

Send an invoice with all its backing detail attached, for contracts that do not run a formal assessment.

Full payment application

Run the whole cycle: the claim, line-by-line assessment and a compliant payment schedule.

One workflow, every time.

STEP 01
Prepare

Cashflow populates the claim; documents and insurances attach from your library.

STEP 02
Submit

Lodge once; the PDF and line detail go direct to the other party.

STEP 03
Assess

Certify or adjust line by line with reasons, then issue the schedule.

STEP 04
Reconcile

The result flows to forecast, cost report and cashflow automatically.

Security of Payments

Compliant by default. Protected by design.

Every schedule carries adjustments, reasons and email records. If a claim is ever adjudicated, the trail is already there.

DeadlinesAutomated reminders before every statutory date.
Audit trailEvery adjustment and message retained against the job.
Cent-perfectRetention and GST calculated, never hand-typed.
Both
Directions, up and down
0
Spreadsheets
100%
SOP audit trail
1
Way to build a claim
Stop managing claims
in spreadsheets.