How to Automate Invoice Processing with Make

How do you automate invoice processing with Make?

Quick Answer: Invoice processing is automated in Make by triggering on new emails or uploaded PDFs, using OCR modules (e.g., Mindee, Docparser, Google Vision) to extract line items, routing data to accounting systems (QuickBooks, Xero, NetSuite) for record creation, and posting approval requests to Slack or email. A typical scenario runs 10-15 modules and processes invoices in 30-60 seconds.

Automating Invoice Processing with Make

Invoice processing automation reduces manual data entry, accelerates payment cycles, and improves audit trails. Make provides the orchestration layer; OCR services extract data; accounting tools receive structured output.

Workflow Overview

Trigger: New email in a dedicated inbox ([email protected]) or new file in a Google Drive folder
Download attachment: Gmail module downloads PDF
OCR extraction: Mindee, Docparser, or Google Document AI extracts vendor, amount, line items, dates
Validation: Router checks extracted fields for completeness
Vendor lookup: Airtable or accounting system lookup confirms vendor exists
Record creation: Create bill in QuickBooks or purchase order in NetSuite
Approval request: Slack message or email to approver with extracted details
Archive: Move original PDF to archived folder

OCR Module Options

Mindee Invoice API

Purpose-built for invoices
50+ fields extracted
$0.10-$0.25 per invoice

Docparser

Template-based (rules per vendor)
Strong on repeat vendors
$39/month for 100 documents

Google Document AI

General-purpose OCR with invoice processor
Tight Google Cloud integration
$0.10 per page (Invoice Parser)

Make Scenario Structure

Gmail (Watch Emails) → Filter (Has Attachment)
  → Gmail (Download Attachment)
  → Mindee (Extract Invoice Data)
  → Router
     → Path 1 (Valid): Airtable Find Vendor → QuickBooks Create Bill → Slack Message
     → Path 2 (Invalid): Slack Error Alert → Gmail Send Correction Request

Validation Rules

Required fields: Vendor name, invoice number, total amount, due date
Range check: Total amount within expected range for vendor
Duplicate check: Search existing invoices by invoice number
Tax validation: Tax matches expected rate

Approval Workflow

Under $500: Auto-approve if vendor is known
$500-$5,000: Approver gets Slack message with approve/reject buttons
Over $5,000: Email to finance manager with full invoice attachment

Error Handling

Make supports error handlers on modules:

OCR fails: Route to manual review queue in Airtable
Vendor not found: Create new vendor record, flag for review
Accounting system down: Retry 3 times, then alert on failure

Typical Results

Processing time: 30-60 seconds per invoice end-to-end
Cost: $0.15-$0.40 per invoice (Make operations + OCR)
Accuracy: 95%+ for standard invoices with clear vendor templates

Scaling Considerations

Make Core plan: 10,000 operations/month — sufficient for ~500 invoices/month
Pro plan: 10,000 operations with prioritized execution
For 1,000+ invoices/month, consider a dedicated AP automation tool (Bill.com, Stampli)