For any commercial subcontractor

Your supplier quoted one price. Did they bill it correctly?

Save hundreds, thousands plus in incorrect supplier billing.

Drop in quotes and invoices. We catch every overcharge and write the credit request.

Your original quotes and invoices — PDF.

Every line, every fee, to the cent.

Request a correction with a prepared email.

From quote to correction

How Red Pen works

Your agreed quote stays the reference. Every new invoice gets checked against it.

1
Upload your original quote
Drop in a supplier’s PDF quote. This is the agreed pricing we’ll check your invoices against.
2
Name your project
Give the new project folder a name you’ll recognize. Each original quote gets its own folder.
3
Drop in an invoice
Red Pen searches your quotes and tags the matching quote. If the match isn’t clear, you choose the project.
4
Review the differences
See flagged price increases, excess quantities and higher fees, alongside the correct amounts.
5
Download the marked copy
Get a copy of the invoice showing the disputes, corrected amounts and recalculated tax. Inferred tax is labeled estimated.
6
Request a supplier correction
Click “Send to supplier” and enter their email—we save it for this project. Attach the downloaded copy to the email that opens, then send.

Illustrative example. Your results depend on the quote and invoice you upload; the supplier confirms any correction or credit.