Automated PDF Invoice Processing & Approval with OpenAI & Sheets

This workflow streamlines end-to-end invoice processing by monitoring multiple sources including Google Drive folders, Gmail attachments, and web form uploads for new PDF invoices. It extracts text from PDFs, leverages GPT-4 for intelligent analysis to pull key fields like vendor, total amount, due date, and line items, and dynamically categorizes invoices (e.g., Travel, Software, Utilities) without manual rules.

An email-based approval system adds human oversight, sending approvers embedded forms for quick decisions and notes. Approved invoices are automatically logged into Google Sheets with full details, status, and feedback for centralized tracking and reporting. Rejections trigger notifications to finance teams for follow-up, ensuring transparency.

Ideal for finance teams and SMBs, it eliminates manual data entry errors, saves hours per invoice, and scales effortlessly. Benefits include faster processing, audit-ready records, reduced costs, and integration with existing Google tools—no coding required.