Extract invoice data from email to Google Sheets using GPT-4o AI automation

Transform your invoice processing from manual data entry into an intelligent automation system. This powerful n8n workflow monitors Gmail for invoice attachments, extracts data using AI-powered analysis, and creates organized Google Sheets with all relevant financial information automatically structured and ready for your accounting workflows.

🔄 How It Works

This sophisticated 8-step automation eliminates manual invoice processing:

Step 1: Intelligent Email Monitoring The workflow continuously monitors your Gmail account for emails with specific labels, checking every minute for new invoice attachments that need processing.

Step 2: Attachment Verification Smart filtering ensures only emails with PDF attachments are processed, preventing unnecessary workflow triggers from text-only emails.

Step 3: Advanced PDF Extraction The system automatically downloads and converts PDF invoices into readable text, handling various invoice formats and layouts with high accuracy.

Step 4: AI-Powered Data Analysis GPT-4 processes the extracted text using specialized prompts designed for financial document analysis, identifying and extracting: - Company information and contact details - Invoice numbers, dates, and payment terms - Detailed line items with quantities and pricing - Tax calculations including CGST, SGST, and VAT - Billing and shipping addresses - Payment methods and transaction references

Step 5: Structured Data Formatting The AI output is automatically formatted into clean, consistent JSON structure with 25+ standardized fields for comprehensive invoice tracking.