Product
Overview
The commercial operating system for construction. Capture a commercial event once, every downstream workflow stays connected.
See the whole product →
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.
See how →
Solutions
Overview
Built for every side of the contract. One commercial record the whole project team can trust, head contract to supplier.
See how it fits your role →
For subcontractors
Free to collaborate
Invited to a project? Submit claims and variations in a format that holds up, free forever.
See the plan →
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.
Read the blog →
Get started
See it on your project
A 30-minute walkthrough on your numbers, where the margin usually leaks.
Book a demo →
Pricing
Solutions/Clients and developers

See where your project stands.

Independent visibility of head-contractor claims, variations, forecast and cashflow, so clients and developers always know where the project stands, without waiting on the next monthly report.

The commercial OS for clients and developers

Know the position without waiting to be told.

You carry the project, so you should be able to see it. ClaimStack gives clients and developers an independent, always-current view of head-contractor claims, variations, forecast and cashflow, all connected in one commercial record from tender to final account, and all backed by a complete audit trail.

Assess and approve head-contractor claims

Head-contractor payment claims come to you for assessment against the live contract, with adjustments and reasons recorded as you go. A clear, auditable approval process replaces the back-and-forth of marked-up PDFs and email chains.

Payment claimsAssessmentApprovals
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

Independent visibility of variations, forecast and cashflow

See variations as they happen, not at final account, and read an independent forecast and cashflow across the project. You are not waiting on a monthly report to understand where cost and time are heading.

VariationsForecastCashflow
02-100 · Cost line
Earthworks & piling
+$20,000 under
Budget$1,840,000Cost plan
Committed$1,795,000Let to date
Spent$1,240,000Cost incurred
Forecast final$1,820,000Cost at completion
SpentCommittedBudgetForecast final
Variance to budget+$20,000

One connected record from tender to final account

The unified contract model links tender, procurement, variations, claims and final account into a single commercial record. Every figure traces back to the event that created it, so the story of the project stays consistent from start to finish.

Unified contract modelTender to final accountCost reports
03-200 · Structure
Concrete structure
Subcontract
Budget$4,260,000
Committed$4,180,00098% of budget
Forecast$4,310,000
Actual$2,980,000Paid to date
Variance −$50,000Live, reconciled from the record

Protect your position with a complete audit trail

Every assessment, adjustment and approval is captured with a full audit trail. If a decision is ever questioned, the record shows exactly what was claimed, what was assessed, and why, so your position is protected.

Audit trailSOP-readyRecords
VO-014 · Version history
Additional piling to grid H
Immutable
Rev 1Submitted
Subcontractor · 24 Jun 2026
Initial submission with breakdown and evidence
$92,400
Rev 2Revised and resubmitted
Subcontractor · 28 Jun 2026
Reissued after site records were provided
$84,500
Rev 3Assessed
Head contractor · 02 Jul 2026
Two lines trimmed, a reason on each
$79,600
Rev 4Approved
Project director · 03 Jul 2026
Cleared the approval threshold and chain
$79,600
Nothing overwritten. Every revision retained against the contract.

Visibility and control, without joining the delivery weeds.

01 Approve head-contractor claims through a clear, auditable process.
02 See variations as they happen, not for the first time at final account.
03 An independent forecast and cashflow you can actually trust.
04 One connected record from tender through to final account.
On a paid plan

Control the spend, tender to final account.

As the client or developer you sit at the top of the chain, so the value is control and visibility rather than claiming. On a paid plan you run your own projects and hold the whole commercial record, from the first tender to the final account.

Assess claims with authority

Head-contractor claims arrive against the live contract; assess and approve them line by line with reasons, on a compliant and auditable process, so every dollar out is a decision you can defend.

Variations as they happen

See variations when they are raised, not for the first time at final account, and read their effect on the cost to complete while there is still time to act.

An independent cost report

Read budget, committed, forecast and actual across the project from the live record, catch exposure early, and see how the contract works and the variations are each really performing.

Forecast and cashflow you trust

An independent forecast and cashflow, current whenever you open it, so funding and drawdowns are planned on reality, not on the last monthly report.

Your project, your budget

Run the whole budget, not just the head contract.

The head contract is one line of your project cost, not all of it. On ClaimStack you set up and own the full development budget, and track your own procurement, direct purchases, consultant fees and fit-out alongside the head-contractor claims, so the entire project cost sits in one place instead of scattered across finance spreadsheets.

Set up the budget

Build the full project budget yourself, every line from land and consultants to construction, contingency and fit-out, and hold it as the baseline everything is measured against.

Your own procurement

Run and track the packages you buy direct, consultants, suppliers, fit-out and FF&E, from order through to invoice, on the same platform as the head contract.

Every cost in one place

Direct purchases, consultant fees, fit-out and the head-contractor claims all land on one cost report, so the whole development position is a single view, not a stack of finance spreadsheets.

See it all

Budget against committed, forecast and actual across every line, so you always know the total cost to complete and where the money is going, whoever is spending it.

Frequently asked

Do we need a paid plan to review a project?

No. If you were invited to a project, the Collaborator plan is free forever. You can assess and approve claims, review variations, and read the forecast and cashflow at no cost.

How do approvals work?

Head-contractor payment claims arrive for assessment against the live contract. You assess and approve with adjustments and reasons recorded as you go, and every step is captured in a complete, SOP-ready audit trail.

Can we see the whole project, not just claims?

Yes. Alongside claims, you get independent visibility of variations, the forecast and cashflow, all connected in one commercial record from tender through to final account.

Can we manage our own budget and direct costs too?

Yes, on a paid plan. You set up the full project budget, run your own procurement and track direct purchases, consultant fees and fit-out costs alongside the head-contractor claims. It all lands on one cost report, so you see budget against committed, forecast and actual across the whole development, not just the construction contract.

See where
your project stands.