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1d • General Discussion 💬
This n8n Workflow Processed 2,400 Invoices While I Slept 🔥
Client sends 80 invoices daily via email. Built n8n workflow that runs 24/7 processing everything automatically.
Woke up to Slack notification: "2,400 invoices processed, 2,387 posted to QuickBooks, 13 flagged for review."
Zero errors. Zero manual work.
THE WORKFLOW (7 NODES):
Gmail Trigger → monitors invoice folder
Parse Document node → converts PDF to clean text
Extract Structured Data node → pulls vendor, date, amount, line items using JSON schema
Function Node → validates amounts, checks for duplicates
Switch Node → routes based on confidence scores
QuickBooks → posts approved invoices
Slack → notifies on completion + flags exceptions
Total build time: 3 hours
Monthly processing: 2,400 invoices
Accuracy: 99.4%
JSON SCHEMA:
{
"vendor_name": "string",
"invoice_date": "date",
"invoice_number": "string",
"total_amount": "number",
"line_items": ["array"]
}
The workflow template pattern is here
CLIENT IMPACT:
Before: Bookkeeper 60 hours monthly manually entering invoices
After: Reviews 13 exceptions (30 minutes monthly)
Savings: $18,000 annually
THE LESSON:
n8n workflows run continuously. Build once, processes forever. Document automation is perfect for set-and-forget workflows.
Most powerful combination: Gmail trigger + document extraction + destination API. That's 80% of document automation right there.
What documents could process themselves while you sleep?
10
7 comments
This n8n Workflow Processed 2,400 Invoices While I Slept 🔥
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