Send due-date reminders from Google Sheets with Gmail and Slack

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1. Workflow Overview

Quick Overview This workflow runs daily, reads deadline rows from Google Sheets, and sends due soon, due today, or overdue reminder emails via Gmail, escalating overdue items to Slack and updating ...

Best for

Personal Productivity automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.code, n8n-nodes-base.gmail, n8n-nodes-base.if, n8n-nodes-base.slack

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Julian Abt.

Original n8n.io source

1.1 Workflow description

Title: Send due-date reminders from Google Sheets with Gmail and Slack
Workflow name: Send due-date reminders from Google Sheets with Gmail and Slack

Quick Overview

This workflow runs daily, reads deadline rows from Google Sheets, and sends due-soon, due-today, or overdue reminder emails via Gmail, escalating overdue items to Slack and updating the sheet to prevent duplicate reminders.

How it works

Runs every day at 07:00 on a schedule.
Reads all rows from a Google Sheets worksheet.
Filters out completed items and rows already reminded today, then classifies remaining rows as due soon, due today, or overdue based on the DueDate.
Sends an HTML reminder email through Gmail to the address in the Email column with a subject and message tailored to the urgency.
Posts an escalation message to a specified Slack channel for items that are overdue.
Updates each reminded row in Google Sheets by writing today’s date to the NotifiedOn column using the stored row number.

Setup

Add Google Sheets credentials and replace the spreadsheet URL/ID and sheet name used for reading and updating.
Add a Gmail OAuth2 credential and ensure the Email column contains valid recipient addresses.
Add Slack credentials and set the target channel (for example, #deadlines) for overdue escalations.
Ensure your sheet includes the columns Title, DueDate (YYYY-MM-DD), Email, Status, and NotifiedOn, and uses Status = "Done" for completed items.
Adjust the reminder window by changing REMINDER_WINDOW_DAYS in the date-classification code if needed.

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 - Overview & Setup

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

Block 2 - Section 1 · Read

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

Block 3 - Section 2 · Compute & Send

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

Block 4 - Section 3 · Escalate Overdue

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

Block 5 - Section 4 · Mark Done

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

Block 6 - Every Day at 07:00

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.3

Block 7 - Read Items

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 8 - Compute Due Reminders

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

Block 9 - Send Reminder Email

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.2

Block 10 - Is Overdue?

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 11 - Escalate Overdue

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.4

Block 12 - Mark Notified

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

3. Summary Table

Workflow	Send due-date reminders from Google Sheets with Gmail and Slack
Complexity	intermediate
Nodes	12
Categories	Personal Productivity
Author	Julian Abt
Published	12 Jun 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/16312/16312.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 Personal Productivity workflows

Frequently asked questions

What does Send due-date reminders from Google Sheets with Gmail and Slack 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 Personal Productivity use case.

Julian Abt

4 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.googlesheets n8n-nodes-base.code n8n-nodes-base.gmail n8n-nodes-base.if n8n-nodes-base.slack

Complexity

intermediate

Published 12 Jun 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/16312/16312.json

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Send due-date reminders from Google Sheets with Gmail and Slack

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Quick Overview

How it works

Setup

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Overview & Setup

Block 2 - Section 1 · Read

Block 3 - Section 2 · Compute & Send

Block 4 - Section 3 · Escalate Overdue

Block 5 - Section 4 · Mark Done

Block 6 - Every Day at 07:00

Block 7 - Read Items

Block 8 - Compute Due Reminders

Block 9 - Send Reminder Email

Block 10 - Is Overdue?

Block 11 - Escalate Overdue

Block 12 - Mark Notified

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