Late time entries
Work logged after an invoice cutoff can quietly roll into the next month—or vanish from the billing queue.
For agencies and consultancies
Find work you earned.Before it goes unbilled.
Compare your billable-time export with issued invoice lines. ProofKit flags likely gaps and drafts invoice-ready rows in about two minutes—without uploading your financial files.
No accountBrowser-local filesPay only after preview
RECONCILIATION COMPLETEREVIEW
2×$29 USD
Exports compared
Time entries ↔ invoice linesLIKELY UNBILLED
$1,260
across 2 client accounts in the sample
Northstar Labs · design revisions$900
Paper Street · reporting workshop$360
2 CSVstime entries + invoice lines
~2 minfrom exports to review
$29 USDone complete report
0 uploadsraw files stay in your browser
The quiet revenue leak
Delivered does not always mean invoiced.
The smaller the piece of work, the easier it is to miss. ProofKit gives an owner or finance lead a short, reviewable list instead of another afternoon of spreadsheet comparison.
Small extras
Revisions, workshops, reporting, and ad-hoc requests are easy to perform and surprisingly easy to omit.
Mismatched descriptions
Timesheets and invoices rarely use identical wording, which makes spreadsheet reconciliation slow and unreliable.
A two-minute revenue check
Two exports in. A review list out.
The calculation is deterministic and visible. You decide which lines are truly billable; ProofKit does the tedious first pass.
Try it with sample data- 01Export billable time
Download a CSV from your time tracker, project tool, or existing spreadsheet.
- 02Export issued invoice lines
Use a CSV from your accounting platform or invoice log.
- 03Review likely gaps for free
ProofKit compares client, description, and value while both files stay in your tab.
- 04Unlock the complete CSV for $29 USD
Download every candidate line, verify it, and move approved work into invoicing.
One report, one payment
$29 USD
Run the complete calculation and inspect a working preview before checkout. No login, trial, subscription, or source-file upload.
- Complete unmatched-work review
- Invoice-ready downloadable CSV
- Seven-day refund window
- Use with one reconciliation run
Before you run it
Clear inputs. Reviewable output.
What files do I need?
One CSV with date, client, description, hours, and rate; plus one invoice-line CSV with invoice ID, date, client, description, and amount. A realistic sample is built in.
Does ProofKit upload financial files?
No. CSV parsing and matching happen in this browser tab. ProofKit receives lightweight usage events and Stripe payment confirmation, never the contents of your source CSVs.
Does every match become an invoice?
No. ProofKit produces a review list, not an accounting decision. You confirm the client, scope, contract, and invoice status before billing anything.
What do I get after paying?
The complete set of likely gaps and a downloadable CSV with invoice-ready draft lines. It is a one-time $29 USD payment with no account or subscription.
Start with the built-in sample