Reads every page
Typed billing sheets, scanned T&M tickets, handwritten sign-ins & photographed receipts — read, bookmarked by document and day, and matched into one roster per day.
AI invoice auditing for construction & restoration
Find more overbilling in a fraction of the time.
Overtrace audits T&M invoices for construction & restoration teams — every timesheet, rate, machine & receipt, against what was signed in the field and agreed in the contract. It catches what manual review misses, turns days into minutes, and cites every finding to its page, so disputes hold up and invoices get paid faster.
The Overtrace review workspace: exceptions grouped by type and sorted by dollars; each finding shows the billed value, the supported value and the difference, with the evidence page beside it and the deciding value highlighted.
- 100s
- 98%+
- Code + AI
- 100%
The problem
T&M packages run to thousands of pages. The auditor on the other side reads every one.
Contractors bill from three sets of paperwork that never quite agree, Excel only adds what it’s told to, and whatever you miss comes back as a dispute — with the payment held until it’s settled.
Forensic math at midnight.
The package arrives as a PDF. Somebody senior exports it to Excel and re-foots it by hand, because the summary grabbed the wrong column again.
Three records, three answers.
The sign-in sheet, the contractor’s own form and the T&M you signed each say something different — and the name is spelled three ways.
Every miss becomes a held dollar.
The auditor on the other side challenges everything. What they find before you do sits unpaid — and strains the client you’re there to protect.
The solution
AI that reads every page, checks every line & proves every finding.
Spreadsheets and spot-checks leave the hard part to a person. Overtrace reads the whole package, reconciles it against your field records, contract rates & receipts, and hands you a ranked list of exceptions — each one tied to the exact line on the exact page.
Checks every line
Code checks what must be exact; AI makes the judgement calls. Add rules in plain English, or let Overtrace learn new ones from your decisions. Exceptions are ranked by dollars.
Proves every finding
Each exception cites its page, with the deciding number boxed, and the rule that flagged it. Your decisions become a letter, a workbook & an annotated PDF in one click.
How it works
From a month of paperwork to a dispute letter, the same afternoon.
A package of several hundred pages is read in minutes. Before it starts, Overtrace tells you how many pages it needs to read and how long that will take.
Drop in the package
One PDF per trade — invoice, billing detail, field T&M, sign-ins, equipment lists & receipts. Add the contract or rate schedule, or a past outside audit.
Confirm the rules
Overtrace pulls each billing term from the contract with its exact quote & page. Nothing applies until you accept it. Add your own rules in plain English.
Review what matters first
Exceptions grouped by type and sorted by dollars, each with the deciding number boxed on its page. Dispute or substantiate in a keystroke.
Send it back, proven
A contractor-ready letter, a workbook of every item, and an annotated, bookmarked PDF of the package — generated from your decisions.
What it catches
Code + AI rules on every line, getting smarter every month.
Code checks what must be exact — hours, rates, math — so results are predictable. AI makes the judgement calls. Add your own rules in plain English, or let Overtrace learn from your decisions and add rules automatically.
Labor hours
- Hours billed above the field-signed T&M
- Employees billed but on no field record
- Sign-in times that don’t support the hours
Rates & classifications
- Labor rates above the contract schedule
- Classification above the trade recorded in the field
- Admin staff billed at premium time
Overtime & premiums
- Overtime before 40 straight-time hours a week
- Sunday premium on a weekday
- Unpaid lunches & days above the hour limit
Equipment & hauling
- Billed on days with no crew on site
- Not on the countersigned equipment list
- Daily rates where a monthly rate applies
Materials & receipts
- Billed without a receipt, or above it
- Duplicate invoice references
- Sales tax marked up & unallowable purchases
Per diem & PPE
- Per diem for local or ineligible employees
- Counts above the field-signed headcount
- Per diem or PPE on zero-hour days
Math & totals
- Extensions that don’t multiply
- Daily totals that don’t foot
- Summary rows with no detail behind them
Documentation
- Billed days with no signed T&M
- Unsigned or uncountersigned field sheets
- Contractor notes overriding signed records
Across invoices — & your rules
- Already billed on an earlier invoice
- An AI sweep for anything the rules miss
- Your own rules, written in plain English
Built to be defended
AI reads the pages. Code decides the findings.
So the same package always produces the same answer, and every number can be defended — to the trade, to the client, and to the auditor on the other side.
Deterministic where it counts
The AI only transcribes the pages. Every comparison, match & calculation is code, so the same package always gives the same findings.
Confidence you can see
Findings that depend on handwriting are marked medium confidence, and hard-to-read pages are listed for a person to check.
A person makes every call
Overtrace raises & explains; your reviewer decides. Every decision is attributed and logged, with precedent shown on each item.
Sharper every month
It learns from what you dispute and substantiate, suggests rule changes where you disagree, and measures itself against outside audits.
Who it’s for
Built for whoever has to stand behind the invoice.
The same evidence works on both sides of the ledger — which is what makes the result easy to agree on.
- Restoration contractorsRestoration and program-management firms: audit every trade’s T&M before it goes to the owner, so the insurer’s auditor finds less and pays sooner.
- GCs & ownersGeneral contractors, owners & owner’s reps: hold every trade to what was signed in the field and agreed in the contract.
- Auditors & consultantsBuilding consultants & cost auditors: review every line of a large-loss package in hours, with your conventions applied consistently.
Questions
Common questions.
What does Overtrace do?
Overtrace is AI invoice-auditing software for construction and restoration. It reads a contractor’s whole time-and-materials billing package — invoice, billing detail, field-signed T&M, sign-in sheets, equipment lists and receipts — checks every line against those records and the contract, and cites every exception to the page it came from.
How is it different from asking ChatGPT to check an invoice?
In three ways. It combines AI and code: AI reads every page — typed, scanned or handwritten — and deterministic code does every match and calculation, so findings are accurate and the same package always gives the same answer. It learns and remembers: your rules, contract terms and past decisions are saved, so it gets more predictable — and smarter — with every invoice, instead of starting from scratch in every chat. And it’s built for review, not blind trust: findings land in a purpose-built queue, sorted by dollars, each beside the page that proves it, so your team can check everything quickly and make every call.
Can it read handwritten timesheets?
Yes. Scanned and handwritten pages are read by AI vision, and names are matched across records even when misspelled or abbreviated. Handwriting-dependent findings are marked medium confidence so a person can confirm them.
How accurate is it?
Overtrace has matched 98%+ of an independent auditor’s disputes on live billing packages of more than 400 pages, with millions of dollars of disputed line items — and flagged items the auditor missed. Import your own outside audits and Overtrace measures itself against them, rule by rule.
What do I get at the end of an audit?
A drafted letter to the contractor stating what’s substantiated and what’s disputed; an Excel workbook with every item, its basis and its pages; and the package itself as an annotated PDF — findings highlighted, evidence pages noted, everything bookmarked.
How is Overtrace priced?
As a small percentage of the T&M value audited — well below typical recovery-audit fees — billed monthly for active projects, with no annual commitment. Many teams carry it as a cost of the work. Every engagement starts with a 60-day pilot on real invoices.
Get started
Bring us your worst package.
See Overtrace audit a real T&M billing package in a 30-minute demo. Then prove it on your next two invoices in a 60-day pilot.
- Bring a real package — see what it finds
- Pilot on your next two monthly invoices
- Direct founder support throughout
- No annual commitment