Mason picks up potential variations and EOTs from site WhatsApp messages and emails. Your QS reviews, approves and submits — backed by the exact contract clause that entitles you.
Drop your subcontract. We'll surface time-bars, set-off rights and capped delay damages — every clause that could quietly cost you margin.
USED BY COMMERCIAL MANAGERS ACROSS AUS, NZ, UK & US
You're at the sharp end of every contract — bearing the time-bars, the set-off, the retention, and the personal guarantee. Mason flips the script: it works for you, not for the people you're billing.
Every job carries a stack of strict notice periods, set-off rights and time-bars buried in the contract. Miss one and the entitlement is gone — quietly, permanently.
Most AS4000 special-conditions amendments shorten variation notice from "reasonable" to 5–7 calendar days as a condition precedent.
It lives on page 47 of the head contract appendix, never read after award, then surprises you when the MC says "too late."
Site teams text the QS. The QS is on three other jobs. By Friday it's buried in a thread and unrecoverable.
Mason sits between contract award and payment, building and protecting the contractual record so every entitled dollar finds its way back to your P&L.
Upload the executed contract once. Mason extracts every clause that matters — notice periods, time-bars, set-off rights, retention, dispute resolution — and builds a risk-ranked register you can negotiate from or work to.
Site team WhatsApps a one-liner. Mason classifies it as a variation, pre-fills the cost breakdown, calculates the notice deadline from the contract, and routes it to the QS — all before lunch.
VO notices, EOT notices, verbal-instruction confirmations, follow-ups. Every draft cites the exact clause from your contract — not generic AS4000 text — and carries the evidence stack with it.
Hi John,
Pursuant to Clause 36.1 of the Subcontract dated 14 March 2026, we hereby give notice of a variation arising from the issue of Drawing A-201 Rev C on 28 April 2026 changing the auditorium wall lining specification from 12mm MDF veneer to perforated acoustic panel.
This notice is given within the 7 calendar days required by Special Condition 4.2. Cost and time impact will follow under separate cover within…
Setup takes about 12 minutes per project. The compounding starts immediately.
Drag in the executed subcontract. Mason runs OCR if it's a scan, chunks the clauses, and stores them for retrieval.
Time-bars, set-off, retention, dispute path — extracted, ranked and exported. Take it into the kickoff meeting.
Site stays on WhatsApp. One number per project. They text what happened. Mason classifies, deadlines, and routes.
The Outlook add-in surfaces the draft VO or EOT in the email you're already composing. Approve, send, logged.
Site team picks plain-English from the list. Mason translates to the clause-by-clause entitlement language your contract requires.
Triggered by drawings, instructions, RFIs, spec changes and site conditions.
Every contractually-recognised cause of delay, captured with date evidence.
Connects to your inbox, your site comms and your submission portals. No new platform to learn, no migrations — Mason works alongside the tools you're already running.
Surface draft notices inside the email you're already composing. Approve and send without leaving the inbox.
Site team texts what happened. Mason classifies it, calculates the deadline, and routes to the QS. No new app.
Pull RFIs, mail and transmittals as evidence on every claim. Submit notices back through your existing module.
Drawings, RFIs and change events flow in; variation notices and EOTs flow out — stamped against the right log.
On the roadmap · Xero · MYOB · SignNow · Microsoft Teams · request an integration →
All plans include contract intelligence, risk review, claims workflow, and AI notice drafting. Site team members are never billed.
Single QS, a handful of active projects.
Established trade with a commercial team and multiple PMs.
Multi-trade or multi-state operators.
14-day trial · No card · Cancel any time · Australian-hosted data
✦ Coming soon
Still wondering? Email us — founder of Mason, ex-QS — and you'll hear back within a day.
Get a free commercial risk review of your current job. No card. No signup wall. We'll show you exactly where the margin leaks are before you trial anything.
Drop your subcontract. We'll surface time-bars, set-off rights and capped delay damages — every clause that could quietly cost you margin.