Extract and Process Invoices with GPT-4, Google Drive, and Google Sheets — n8n Workflow

Medium complexity⚡ Trigger12 nodes🏷️ Invoice Processing👁 1 viewsby Wolfgang Renner

Overview

This template is a fully automated AI invoice processing workflow for n8n. It watches a Google Drive folder for new invoice PDFs, extracts all key information using an AI Agent, assigns the correct booking account, saves the renamed invoice in the right Drive folder, and updates your Google Sheets booking list.

A perfect starter template if you want to build your own AI-powered accounting automation.

What this workflow does Monitors a Google Drive folder for new invoice PDFs. Downloads and ext

Nodes used

Google SheetsGoogle DriveAI AgentOpenAI Chat ModelSimple MemoryStructured Output Parser

Workflow Preview

INPUT
Upload Invoice PDF from Google Drive Input Folder and E
OUTPUT
Saving Invoice with new filename (YYMMDD vendor) as PDF
AI AGENT
reading relevant information (vendor, bookingtext, amou
The output parser set the defined variables.
INVOICE AGENT BASIC
AI-Powered Invoice Extraction & Google Drive Automation
This workflow processes PDF incoming invoices from an i
OUTPUT
Updating the Booking list with actual Invoice by upendi
Move the processed invoice to the output folder.
memorytoolmodelparser
Update Booking List
C
Chart of Accounts
Save to Drive
Structured Output Parser
OpenAI Chat Model
E
Extract from File
Simple Memory
⚡
G
Google Drive Trigger
E
Edit Fields
Move file
Download file
Invoice Agent
12 nodes11 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 12 nodes, connecting agent, extractfromfile, googledrive.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (12)

GO

Google Sheets

googleSheets

#1
GO

Google Drive

googleDrive

#2
AI

AI Agent

n8n-nodes-langchain.agent

#3
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#4
SI

Simple Memory

n8n-nodes-langchain.memoryBufferWindow

#5
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#6

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded extract-and-process-invoices-with-gpt-4-google-drive-and-google-sheets file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Extract and Process Invoices with GPT-4, Google Drive, and Google Sheets", "nodes": [...], ...}

Integrations

agentextractfromfilegoogledrivegoogledrivetriggergooglesheetsgooglesheetstoollmchatopenaimemorybufferwindowoutputparserstructuredset

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes12
Complexitymedium
Triggertrigger
Views1
CategoryInvoice Processing

Created by

Wolfgang Renner

Wolfgang Renner

@naviqo

Tags

agentextractfromfilegoogledrivegoogledrivetriggergooglesheetsgooglesheetstoollmchatopenaimemorybufferwindowoutputparserstructuredset
⚡

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Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpoint—the bill—is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

🔗 Webhook·12 nodes