{"product_id":"approve-employee-expenses-with-openai-google-sheets-telegram","title":"Approve Employee Expenses with OpenAI, Google Sheets \u0026 Telegram","description":"\u003ch3\u003eApprove employee expenses automatically—using OpenAI, Google Sheets, and Telegram\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow receives employee expense submissions through a webhook, uses \u003cstrong\u003eOpenAI (GPT-4o-mini)\u003c\/strong\u003e to categorize and determine whether manager approval is required, logs everything to \u003cstrong\u003eGoogle Sheets\u003c\/strong\u003e, and keeps both employees and managers in sync via \u003cstrong\u003eTelegram\u003c\/strong\u003e (plus follow-up approval requests by \u003cstrong\u003eGmail\u003c\/strong\u003e).\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceives submissions via POST webhook:\u003c\/strong\u003e Accepts expense fields such as \u003cem\u003eemployee_name\u003c\/em\u003e, \u003cem\u003eemployee_chat_id\u003c\/em\u003e, \u003cem\u003edescription\u003c\/em\u003e, \u003cem\u003eamount\u003c\/em\u003e, \u003cem\u003ecurrency\u003c\/em\u003e, and \u003cem\u003evendor\u003c\/em\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValidates and normalizes data:\u003c\/strong\u003e Generates an expense ID, normalizes key fields, and rejects invalid submissions by notifying the employee in Telegram.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUses OpenAI to enrich each expense:\u003c\/strong\u003e Sends expense details to \u003cstrong\u003eGPT-4o-mini\u003c\/strong\u003e to classify the category, clean the amount, and decide whether \u003cstrong\u003emanager approval\u003c\/strong\u003e is needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLogs to Google Sheets:\u003c\/strong\u003e Appends an enriched record into a Google Sheets “Expenses” sheet with \u003cstrong\u003eAUTO_APPROVED\u003c\/strong\u003e or \u003cstrong\u003ePENDING_APPROVAL\u003c\/strong\u003e status.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoutes approvals:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003eIf \u003cstrong\u003ePENDING_APPROVAL\u003c\/strong\u003e, sends the details to the manager via \u003cstrong\u003eTelegram\u003c\/strong\u003e and triggers an approval request email via \u003cstrong\u003eGmail\u003c\/strong\u003e.\u003c\/li\u003e\n      \u003cli\u003eIf \u003cstrong\u003eAUTO_APPROVED\u003c\/strong\u003e, notifies the employee via Telegram.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMonthly summary report:\u003c\/strong\u003e On the \u003cstrong\u003e1st day of each month\u003c\/strong\u003e, reads logged expenses from Google Sheets, asks OpenAI to generate a monthly summary, and sends the report to the manager via Telegram.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eStreamline reimbursements by auto-categorizing expenses and flagging exceptions for manager review.\u003c\/li\u003e\n  \u003cli\u003eCentralize expense tracking in Google Sheets while maintaining real-time approvals through Telegram and Gmail.\u003c\/li\u003e\n  \u003cli\u003eGenerate consistent monthly expense reporting without manual spreadsheet work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrations \/ nodes:\u003c\/strong\u003e Webhook, OpenAI (GPT-4o-mini), Google Sheets, Telegram, Gmail, plus workflow logic nodes like \u003cem\u003eif\u003c\/em\u003e and \u003cem\u003eset\u003c\/em\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e Enriched “Expenses” rows with approval status and OpenAI-generated categorization.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45824199000243,"sku":"N8N-18188","price":45.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/YULS2vxlt8-EQVbqydAVL_BAC9gNnb.png?v=1786611744","url":"https:\/\/buyflowscripts.com\/products\/approve-employee-expenses-with-openai-google-sheets-telegram","provider":"N8N Commerce","version":"1.0","type":"link"}