Marketing Ops with Sam

Automations · Built and documented

Automate invoice processing with n8n and AI.

Quick answer: An n8n invoice workflow watches a Google Drive folder, extracts the text from each new PDF, uses AI to pull out the vendor, invoice number, date and total, adds a row to Google Sheets and emails a confirmation. Nobody copies invoice details by hand.

How it flows.

  1. 1Invoice lands in DriveGoogle Drive
  2. 2Text extractedn8n + OCR
  3. 3Details pulled outAI
  4. 4Row addedGoogle Sheets
  5. 5Confirmation sentGmail

How it’s built.

  1. Watch a folder

    A Google Drive trigger starts the workflow when a new invoice arrives.

  2. Extract the text

    Native PDFs are read directly and scanned ones go through OCR.

  3. Structure it with AI

    The model returns vendor, invoice number, date and total as clean fields.

  4. Log and confirm

    A row is appended to Google Sheets and a confirmation email goes to the right person.

The full write-up

Node-by-node walkthrough with the workflow diagram.

Read the full build

Questions people ask.

Can n8n read PDF invoices?

Yes. n8n can extract text from PDFs, and with OCR it can read scanned invoices too. An AI step then turns the text into structured fields.

Where should the invoice data go?

Google Sheets is the simplest start. The same workflow can write to Xero, QuickBooks or a database instead.

Want this built for you?

I build automations like this in your own accounts, with the same guardrails, and hand over a runbook so your team can run it.

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