{"product_id":"gmail-invoice-email-to-google-sheets-slack-reminder-n8n","title":"Gmail Invoice Email to Google Sheets + Slack Reminder (n8n)","description":"\u003ch3\u003eTurn Gmail invoice PDFs into a live Google Sheets ledger—then auto-remind finance in Slack\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow watches your Gmail for newly labeled invoice emails, extracts invoice details from attached PDFs using OpenAI (GPT-4o), appends the structured data to Google Sheets, and automatically sends a payment reminder email—followed by an escalation message in your Slack \u003cstrong\u003e#finance\u003c\/strong\u003e channel.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMonitors Gmail every minute\u003c\/strong\u003e for new messages that have the \u003cstrong\u003eINVOICES\u003c\/strong\u003e label.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtracts text from the invoice PDF attachment\u003c\/strong\u003e in the email.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUses OpenAI (GPT-4o)\u003c\/strong\u003e to parse the extracted text into structured invoice fields: \u003cem\u003evendor, invoice number, amount, currency, and due date\u003c\/em\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAppends the invoice data to a Google Sheets accounting ledger\u003c\/strong\u003e (ledger-style worksheet for tracking).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvaluates a score value\u003c\/strong\u003e and, when it meets your configured threshold, sends a \u003cstrong\u003epayment reminder email\u003c\/strong\u003e to the defined recipients.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePosts an escalation message to Slack\u003c\/strong\u003e right after the reminder email is sent, helping your finance team respond faster.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAccounts payable teams who receive vendor invoices by email and want automatic entry into a Google Sheets ledger.\u003c\/li\u003e\n  \u003cli\u003eSaaS operators managing recurring billing\/vendor payments and needing due-date reminders with Slack escalation.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers deploying an n8n workflow that bridges \u003cstrong\u003eGmail + PDF parsing + OpenAI + Google Sheets + Slack\u003c\/strong\u003e for invoice ops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGmail trigger\u003c\/strong\u003e: runs every minute for emails with the \u003cstrong\u003eINVOICES\u003c\/strong\u003e label.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmail\/PDF processing\u003c\/strong\u003e: extracts text content from the email’s PDF attachment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpenAI (GPT-4o)\u003c\/strong\u003e: converts unstructured PDF text into structured invoice fields.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGoogle Sheets\u003c\/strong\u003e: append operation to your target spreadsheet and worksheet.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmail send\u003c\/strong\u003e: sends payment reminder messages to configured recipients.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlack\u003c\/strong\u003e: posts to your finance channel (e.g., \u003cstrong\u003e#finance\u003c\/strong\u003e), including an escalation message after the reminder email.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSetup in a nutshell\u003c\/h3\u003e\n\u003cp\u003eConnect Gmail (ensure invoices have the \u003cstrong\u003eINVOICES\u003c\/strong\u003e label), add an OpenAI credential (confirm \u003cstrong\u003eGPT-4o\u003c\/strong\u003e access), configure Google Sheets append targets, set email-sending credentials and reminder recipients, and connect Slack with the correct finance channel.\u003c\/p\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45865759211699,"sku":"N8N-18380","price":46.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/DHlqIMdMfJYjO2xv-78PP_HxB3OYXL.png?v=1787044055","url":"https:\/\/buyflowscripts.com\/products\/gmail-invoice-email-to-google-sheets-slack-reminder-n8n","provider":"N8N Commerce","version":"1.0","type":"link"}