Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Best for

HR automation workflows
AI Summarization automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.emailsend, n8n-nodes-base.slack, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Oneclick AI Squad.

Original n8n.io source

1.1 Workflow description

Title: Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts
Workflow name: Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts

Automate your payroll process with this efficient workflow. Triggered monthly on the 28th, it fetches employee data from a Google Sheet, uses AI to calculate net salaries with tax and deductions, structures payslip data, generates PDF payslips, and notifies employees via email while alerting HR on Slack. Ensure accurate payroll distribution with minimal manual effort. 💰📧

Good to Know

The workflow runs on the 28th of each month to align with typical payroll cycles.
Ensure AI credentials and Google Sheet access are configured for smooth operation.

How It Works

The Monthly Payroll Trigger initiates the process on the 28th.
Gets Employee Data by reading salary and deduction details from a Google Sheet.
AI Calculates Salary applies tax and deduction rules to compute net pay.
Formats Payslip Data prepares structured data for distribution.
Generates PDF Payslip creates individual payslip documents.
Logs payroll data to a Google Sheet for records.
Branches to:
- Sends Email Payslip to Employee with the PDF attachment.
- Notifies HR on Slack with payroll completion details.

How to Use

Use the manual trigger for testing, then set a monthly cron (e.g., 0 0 28 * *) for live runs on the 28th.
Adjust tax and deduction rules in the AI node to match local regulations.

Requirements

GOOGLE_SHEET_ID: Your Google Sheet ID (structured as below)
Credentials Needed:
1. Google Sheets OAuth2
2. Gmail API Key
3. OpenAI API Key (or similar)
4. Slack Bot Token (with chat:write permissions)
Customize:
• Employee data columns (e.g., ID, Name, Base Salary, Deductions)
• Tax and deduction formulas
• Email subject and Slack message format

Google Sheet Structure:

Create a sheet with columns:
- Employee ID
- Name
- Base Salary
- Deductions
- Net Salary
- Payslip Status
- Updated At

Customizing This Workflow

Adapt for bi-weekly payroll by adjusting the trigger to the 14th and 28th.
Integrate with HR systems like BambooHR for real-time employee updates.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Monthly Payroll Trigger

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.1

Block 2 - Get Employee Data

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.2

Block 3 - AI Calculate Salary

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 4 - Format Payslip Data

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 5 - Log to Payroll Sheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.2

Block 6 - Generate PDF Payslip

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 7 - Email Payslip to Employee

Type / Role: n8n-nodes-base.emailSend - emailSend
Config choices: Version 2.1

Block 8 - Notify HR on Slack

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.1

Block 9 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 13 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts
Complexity	intermediate
Nodes	14
Categories	HR, AI Summarization
Author	Oneclick AI Squad
Published	24 Oct 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/10107/10107.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source HR workflows AI Summarization workflows

Frequently asked questions

What does Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your HR, AI Summarization use case.

Oneclick AI Squad

224 workflows

Nodes

n8n-nodes-base.scheduletrigger n8n-nodes-base.googlesheets n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.emailsend n8n-nodes-base.slack n8n-nodes-base.stickynote

Complexity

intermediate

Published 24 Oct 2025

Likes 0

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Install path: /data/workflows/10107/10107.json

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Automate payroll processing with GPT-4, Google Sheets, PDF payslips & Slack alerts

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Good to Know

How It Works

How to Use

Requirements

Customizing This Workflow

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Monthly Payroll Trigger

Block 2 - Get Employee Data

Block 3 - AI Calculate Salary

Block 4 - Format Payslip Data

Block 5 - Log to Payroll Sheet

Block 6 - Generate PDF Payslip

Block 7 - Email Payslip to Employee

Block 8 - Notify HR on Slack

Block 9 - Sticky Note

Block 10 - Sticky Note1

Block 11 - Sticky Note2

Block 12 - Sticky Note3

Block 13 - Sticky Note4

Block 14 - Sticky Note5

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions