Built for construction subcontractors
Record extra work on site, get the price approved, keep the evidence and turn variations into invoice-ready revenue.
Free plan available • No card required • Clients don't need a ProofPay account
Awaiting approval
£4,200
3 variations
Approved, not invoiced
£9,640
5 variations
Invoiced
£7,310
4 variations
Paid
£3,900
2 variations
V014 · Additional kitchen island outlets
Awaiting approval£870
V013 · Extra fire-stopping to riser
Approved£1,240
V012 · Relocate distribution board
Invoiced£2,180
Example project data shown for illustration.
ProofPay creates a clear record from instruction to invoice.
Capture the extra work while you're still on site.
Turn the site instruction into a proper variation.
Send the client a secure approval link.
Upload completion photos and notes when the work is finished.
Add approved and completed variations to an invoice.
You send one secure link. The client sees the priced variation exactly as you built it and records a decision against that price — approve, request changes or reject.
Variation V014
Clients don't need a ProofPay account.
Awaiting approval
£4,200
3 variations
Approved, not invoiced
£9,640
5 variations
Invoiced
£7,310
4 variations
Paid
£3,900
2 variations
V014 · Additional kitchen island outlets
Awaiting approval£870
V013 · Extra fire-stopping to riser
Approved£1,240
V012 · Relocate distribution board
Invoiced£2,180
Example project data shown for illustration.
Revenue protected, awaiting approval, invoiced and paid at a glance.
Site instruction with requester, time, location and photos.
Labour, materials, plant and subcontractor lines with markup and VAT.
A secure link showing the priced variation and three clear actions.
Completion photos and notes attached to the approved variation.
Approved and completed variations rolled into one invoice.
Build clear variations with labour, materials, plant, markup and VAT all recorded in one place.
Totals are recalculated on the server on every save — browser values are never trusted.
Every approval is tied to the exact price and version the client saw. If the price changes, new approval is required.
Immutable variation versions; an approval never carries over to a re-priced version.
See when work was recorded, priced, approved, completed and invoiced.
Append-only audit trail per project — entries are written, never edited.
Photos from the site camera stay attached to the instruction and the completion record.
Private file storage with short-lived signed links; no public URLs.
£0
For trying ProofPay.
One £290 approved variation equals the cost of a full year of ProofPay Pro Annual. Prices exclude VAT.
Accounts are protected by email and password authentication with email verification and password reset.
Projects, variations, evidence and invoices belong to your company. Access is checked per company membership on every request.
Client approval links use long, unguessable tokens and expose only the variation they were issued for.
Contracts and completion photos are stored in private buckets and served through short-lived signed links, never public URLs.
Permissions and pricing maths are enforced on the server with database row-level security, not in the browser.
You can delete your account from Settings. This removes your account and cancels any active subscription.
Extra work often gets requested verbally, completed quickly and argued about later. ProofPay gives subcontractors a simple way to document the instruction, agree the value, capture approval and keep the evidence together before invoicing.