Vendor PDFs in Gmail, one row in Sheets. Never paid.

What it does

Invoice Inbox is an n8n invoice workflow for vendor invoices sitting in Gmail. It polls Gmail for invoice PDFs, reads vendor, amount, and due date with regex on the PDF text, and writes one Google Sheets row each. Status is logged. Nobody gets paid.

That is the whole job: Gmail invoice PDF to Google Sheets. A log of what arrived. Not a robot that pays it.

What it never does

It never pays a vendor. It never talks to a bank. It never creates a bill. It never emails the vendor. There is no auto-pay path in the pack.

If you already run QuickBooks Bills, Xero, or a bank feed, skip this.

Who it is for

Freelancers and tiny ops teams drowning in vendor PDFs. You live in Gmail and Google Sheets. You do not want AP software. You want a log of what arrived, and a Slack ping when the extract is shaky.

Gmail invoice PDFs to Google Sheets with n8n

Import two n8n workflows. They poll Gmail for PDF invoices, extract vendor, amount, and due date with regex on the PDF text, and append one row in Google Sheets. Below 70 confidence, status is needs_review and Slack gets a ping. The pack never pays a vendor or talks to a bank.

This is vendor-invoice automation for Gmail: find the PDF, log the row, stop. No LLM required to run.

Setup

1. Buy the zip on Gumroad. You get two n8n workflows.
2. Import both into your n8n.
3. Connect Gmail, Google Sheets, and Slack.
4. Turn them on. They poll Gmail for PDF invoices and append Sheets rows.
5. Below 70 confidence, the row is needs_review and Slack gets a ping. A human looks.

What you get

• Polls Gmail for PDF invoices and writes vendor, amount, and due date to Google Sheets.
• Default extract is regex on PDF text. No LLM required to run.
• Confidence under 70 writes needs_review and pings Slack.
• Never talks to a bank, never creates a bill, never emails the vendor.

Questions

Does Invoice Inbox pay vendors or auto-pay bills?

No. It never pays a vendor, never talks to a bank, never creates a bill, and never emails the vendor. Status is logged in Google Sheets. There is no auto-pay path.

How do Gmail invoice PDFs get into Google Sheets?

Two n8n workflows poll Gmail for PDF invoices, extract vendor, amount, and due date with regex on the PDF text, and append one Google Sheets row each. Below 70 confidence, status is needs_review and Slack gets a ping.

Is this an n8n invoice workflow I import myself?

Yes. You import the two workflows into your n8n, connect Gmail, Google Sheets, and Slack, and turn them on. Default extract is regex. No LLM required to run.

Who is Invoice Inbox for?

Freelancers and tiny ops teams drowning in vendor invoice PDFs in Gmail. You live in Gmail and Sheets, not AP software. If you already run QuickBooks Bills, Xero, or a bank feed, skip this.

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