{"product_id":"ai-invoice-receipt-extraction-from-gmail-to-google-sheets-n8n","title":"AI Invoice Receipt Extraction from Gmail to Google Sheets (n8n)","description":"\u003ch3\u003eAI-powered invoice receipt extraction from Gmail straight into Google Sheets (with human review when needed)\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow automatically scans your Gmail for invoice PDF attachments, uses AI to extract key fields (vendor, invoice number, dates, currency, net, tax, total), and logs results into Google Sheets—deduplicated and validated. If anything looks doubtful, it emails you for review as \u003cstrong\u003e“Needs review”\u003c\/strong\u003e, keeping your bookkeeping accurate and audit-ready.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolls Gmail for the right emails\u003c\/strong\u003e: Only messages with real PDF attachments pass through—newsletters and calendar invites are guarded out so they don’t trigger AI.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtracts PDF text inside n8n\u003c\/strong\u003e: The workflow extracts the PDF’s text directly within n8n (no OCR service and no per-page OCR fees).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalyzes invoices with AI\u003c\/strong\u003e: The AI returns strict JSON including vendor, invoice number, invoice\/document type, dates, currency, net, tax, total, and a confidence score.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValidates numbers in code\u003c\/strong\u003e: A \u003ccode\u003eCode\u003c\/code\u003e node normalizes currency and checks arithmetic by validating \u003cstrong\u003enet + tax vs total\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeduplicates automatically\u003c\/strong\u003e: The workflow looks up the invoice number in your sheet before writing—forwarded copies or reminder emails won’t be logged twice.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlags uncertain results\u003c\/strong\u003e: Low-confidence or broken extractions (e.g., missing total or failed validation) are emailed to you and logged as \u003cstrong\u003eStatus = “Needs review”\u003c\/strong\u003e; clean records are logged as \u003cstrong\u003eStatus = “Auto”\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBookkeeping teams who want \u003cstrong\u003einvoice receipt automation\u003c\/strong\u003e without manual data entry.\u003c\/li\u003e\n  \u003cli\u003eSaaS operators consolidating invoice data from forwarded Gmail messages into a single Google Sheets ledger.\u003c\/li\u003e\n  \u003cli\u003en8n engineers building reliable \u003cstrong\u003eAI invoice extraction\u003c\/strong\u003e with code-based validation and an exception workflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003en8n nodes\u003c\/strong\u003e: \u003ccode\u003eif\u003c\/code\u003e, \u003ccode\u003ecode\u003c\/code\u003e, \u003ccode\u003eno op\u003c\/code\u003e, Gmail nodes, plus supporting nodes like \u003cem\u003esticky note\u003c\/em\u003e (for clarity).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInputs\u003c\/strong\u003e: Gmail via \u003cem\u003e“When Invoice Email Received”\u003c\/em\u003e and a review alert to your address.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAI\u003c\/strong\u003e: \u003cem\u003eAI Invoice Analyzer\u003c\/em\u003e using an \u003cstrong\u003eOpenAI (or compatible)\u003c\/strong\u003e credential.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput\u003c\/strong\u003e: One Google Sheets table with columns such as Date, Vendor, Invoice number, Invoice date, Type, Currency, Net, Tax, Total, Status, and Email subject.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45822090444979,"sku":"N8N-18083","price":15.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/3zcmV8LbebRlkErwDW74H_QvBqMC0u.png?v=1786525638","url":"https:\/\/buyflowscripts.com\/products\/ai-invoice-receipt-extraction-from-gmail-to-google-sheets-n8n","provider":"N8N Commerce","version":"1.0","type":"link"}