Billing Review
Same-day billing review. Every line, against the contract.
Forward the bill. Kos reads every page, from pay apps and progress invoices to lien waivers and certified payroll, checks each line against the contract and prior bills, and returns a comment log in your Excel format the same day.
Kos reads all 812 pages of Ridge Electric’s pay app #14, ties out the distribution and generator lines, and flags switchgear billed ahead of the work, Hollis Supply’s missing lien waiver and retainage held at 2.5% where the contract keeps 5%. It recommends $754,300 of the $1,374,750 requested, drafted in NetSuite for your approval.
The Problem
Every bill is read by hand.
One site sends hundreds of pages every few weeks, and someone has to hold each line against the contract.
800+ pages per pay app
One pay application, for one datacenter building. Another arrives every few weeks.
Thousands of pages of contract
The GMP contract sets what can be paid: the schedule of values, retainage, and stored materials.
Checked by hand, on weekends
Line by line, in spreadsheets, over email.
At Scale
Every new site adds a desk.
One site fills one desk. Each row is one site’s month of documents. The line is the team.
The close slips. The paper triples and the team finds one more analyst. The talent pool is tiny, so site 3 waits for the weekend.
Lender draws wait on backup. The construction monitor asks for the waiver log and the stored-materials backup. Both sit in inboxes across six sites.
Overbilling is found after it is paid. No one has the hours to hold each pay application against the field report. A line billed at 71% with 58% in place is paid in full on Friday.
Illustration. One row is one site’s month of documents, and the team adds one analyst per step. At 12 sites, the line billed at 71% is pay app #14’s switchgear line.
How It Works
Forward the bill. Kos reads every page.
Nothing changes for your team or your contractors. The bill goes to Kos the way it goes to a colleague, and comes back reviewed the same day.
Hand Kos the work
Email it the bill like you would a colleague, or ask it in Slack, Teams, iMessage or on a call.
Kos reads every page
Pay apps and progress invoices, the schedule of values, sub invoices, lien waivers, certified payroll and the field report, each line against the contract and past bills.
Kos flags what doesn’t tie out
Missing backup, overbilling and calculation errors come back with the lines and clauses behind them.
Kos files the work
A line-by-line review in your Excel format, commentary by email to the project executive, and the entry drafted in your ERP for your approval.
What It Catches
What Kos flags on every bill.
Each flag comes back with the line, the page and the clause behind it. What you recover is your call.
Billed ahead of the work
Percent complete billed past what the field report shows in place.
Field report
Missing lien waivers
Suppliers paid without the conditional waiver the contract requires.
Lien waivers
Retainage math
Retainage held below the contract’s rate, or released before it’s due.
Retainage
Stored materials without backup
Materials billed as stored with no bill of sale, insurance or location.
Stored materials
Payroll that doesn’t add up
Certified payroll hours that don’t match the invoice or daily reports.
Daily reports
Change orders billed early
Change-order work billed before the change order is signed.
Change orders
Lines moved to hide an overrun
Value shifted between schedule-of-values lines without a change order.
Original SOV
Math that doesn’t foot
Columns that don’t add up, and prior-period totals that drift.
G703 totals
Where The Work Lands
The review lands where you already work.
Your workbook, your inbox and your ERP. And the thread stays open for questions.
In your Excel format
A line-by-line review in your workbook, in your columns and your team’s voice. Every check is logged.
In the thread, with the commentary
Commentary by email, each finding with its page and clause. Nothing goes to the GC or the lender until your team signs off.
In your ERP, for your approval
Kos drafts the entry with the recommended payment. Your team approves and pays in the system you already use.
Ask Kos anything about the project
“Is this the same certified payroll issue we had on pay app 11?” Kos answers in the thread with the lines and the backup. If a document is missing, it asks.
A human approves before anything posts.
Both Sides
Reviewing a bill, or submitting one?
Kos reads the same documents from either side of the table.
Owners and developers
Kos reviews the GC’s application against your contract and field report, and returns the recommended payment with every deduction cited.
For the CFO and project accounting
General contractors
Kos reads your subs’ applications, waivers and certified payroll before they go into your own G702 and G703, so the package you submit is the package that gets paid.
For the pay-app lead
For The Owner
What it means for the owner.
Your standards on every site
Every pay app gets the same full read on every site, without adding headcount.
Draws the lender can follow
Every finding in the draw package cites its clause and page.
Sharper cash forecasts
Line-level reviews feed sharper 6- and 12-month cash forecasts.
Partners paid sooner
Same-day reviews get the GC and subs paid on time, which keeps the best crews.
$100M+1
Spend you can negotiate
Negotiable opportunity surfaced on one developer’s program.
1 Hyperscale data center developer, 2026.
Built For Your Industry
Wherever a contractor bills against a contract.
Billing review in the words of each industry Kos works in.
Data centers
Every GC pay app checked against the GMP, so the lender draw goes out on time.
Defense
Every line of a new facility’s budget checked against the work in place, before month-end close.
Manufacturing
Fit-out pay apps checked against the schedule, stage by stage, up to start of production.
Questions, answered.
The contract, the prior bills, and the inbox your contractors already send to.
AIA G702 and G703, GMP and lump-sum agreements, and the exhibits that govern billing.
No. It fills out your workbook, in your columns, in your team’s voice.
Kos asks the contractor for it in the thread and holds the line until it arrives.
Your project executive or cost manager. Nothing goes to the contractor or the lender until your team signs off.
Kos works inside your systems under its own identity, with only the access you grant, and every action is logged.
Save hundreds of hours on billing review.
No new software to learn. Email Kos a bill and watch it check every line against the contract.