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/Forecasting

Forecast on reality.

A live cost-to-complete with risk & opportunity reporting and a forecast position on every open variation, reflecting what happened today, with an audit trail behind every change.

A forecast is only useful if it is current.

Which means the end of the forecasting window. There is no forecast to open and no cutoff to make, no notes on a pad waiting to be keyed in once it is. Every commercial event feeds straight in as it happens, a variation submitted, a claim issued, a commitment raised, so the number is always live and your system is never behind.

01 · Cost to complete

Reflects today, not last month.

The cost-to-complete moves the moment a commercial event lands: a variation submitted, a variation assessed, a claim issued, a commitment raised. Budget, committed, spent and forecast final cost sit on one line, so the variance to budget is never a month-end surprise.

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
02 · Risk & opportunity

See exposure while you can still act.

Track risks and opportunities against the forecast, each with a value and a likelihood, and read the net exposure at a glance. It surfaces early, so decisions happen while there is still room to move.

Forecast · Risk & opportunity
Exposure on the forecast
+$190,000 net
RiskFacade access & weather delayLikely+$120,000
RiskLatent ground conditions, pilingPossible+$85,000
RiskServices coordination reworkPossible+$60,000
OppSteel alternative sectionLikely-$45,000
OppEarly-payment discount, servicesPossible-$30,000
Risk $265,000Opportunity $75,000Net exposure +$190,000
03 · Forecast on variations

Carry variations on the number you trust.

Every open variation carries a forecast position on the basis you choose, submitted, assessed or a custom value, so the exposure you report matches the position you actually stand behind. Approve one and the forecast final cost moves with it.

15-700 · Exposure move
Building services
Variation approved
VO-018Switchboard capacity upgrade+$68,000
Forecast final cost$5,280,000$5,348,000+$68,000
Variance to budget-$40,000-$108,000-$68,000
Budget held at $5,240,000 · exposure widens $68,000Live forecast
04 · Trusted

Every change has a reason.

No forecast moves silently. Each change to the cost-to-complete carries who changed it, when, and why, with the before and after value on the record, a full audit trail behind every number you present.

Edit cost to complete
Site establishment & setup · Budget $1,250,000 · Committed $35,865
EditorHistory
John Smith10 Jul 2026, 3:37 pm
“Half amount required now”
ChangedCTCSite sheds$50,000.00$25,000.00
John Smith2 Jul 2026, 10:12 am
“Aligned to awarded subcontract”
ChangedCTCPerimeter fencing$96,000.00$82,400.00
Choose your basis

Carry risk on the number you trust.

Pick the forecast basis per item, submitted, assessed, or a custom value, so the exposure you report matches the position you actually stand behind.

SubmittedCarry the risk on the amount as claimed.
AssessedCarry it on the agreed, assessed position.
CustomSet your own value where judgement is needed.
Live
Cost-to-complete
0
Month-end rebuilds
3
Forecast bases
Changes on the record
Stop forecasting
from memory.