Automate Employee Reimbursement Workflow with Gmail, Google Drive & AI Validation — n8n Workflow

Medium complexity⚡ Trigger13 nodes🏷️ Invoice Processingby Pramod Rathoure

Overview

Reimbursements used to be a headache.

Employees submitted receipts through emails, managers got stuck in approval chains, and finance teams spent hours checking for duplicates, updating sheets, and sending follow-up emails.

So, we automated it.

Using n8n, we built a smart Employee Reimbursement Workflow that does everything… in just a few clicks.

Here’s how it works.] When an employee uploads a receipt, the workflow first checks for duplicates. If the file is new, it’s uploaded to Google Dri

Nodes used

Google SheetsGoogle DriveGmailCodeOpenAI

Workflow Preview

Submit Form
This form will get all required information from the us
Validate User Uploaded Bills.
Validate if the user uploaded bill already exists into
If Yes then reuse and download for proccesing.
Else -- Upload the bill and then use for pr
Uploads and Downloads
If Bills Already Exist] Download the file and send to n
If Bills Does not Exists
- Merge - This node will get the user
Extract, Validate
These nodes will
- Extract the content from the bill
- Validate if the claim made by the user is correct. Wh
- If fa
Invalid Claim
Valid Claim
- Notify User with the request id.
- Notify Finance Team to proceed with review.
⚡
O
On form submission
M
Merge
I
if Bill Exists
Download Existing Bill
Mail Invalid Claim
Mail Valid Claim
MergeInputs
Validate False Claims
Upload_Bills
Download_Bills
Search_Bill
I
If
Add Request
13 nodes14 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 13 nodes, connecting code, formtrigger, gmail.

  3. 3

    Output

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

Node Details (13)

GO

Google Sheets

googleSheets

#1
GO

Google Drive

googleDrive

#2
GM

Gmail

gmail

#3
CO

Code

code

#4
OP

OpenAI

n8n-nodes-langchain.openAi

#5

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 automate-employee-reimbursement-workflow-with-gmail-google-drive-ai-validation 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": "Automate Employee Reimbursement Workflow with Gmail, Google Drive & AI Validation", "nodes": [...], ...}

Integrations

codeformtriggergmailgoogledrivegooglesheetsifmergeopenai

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes13
Complexitymedium
Triggertrigger
CategoryInvoice Processing

Created by

Pramod Rathoure

Pramod Rathoure

@prathoure

Tags

codeformtriggergmailgoogledrivegooglesheetsifmergeopenai
⚡

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🔗 Webhook·12 nodes