Send automated invoice payment reminders with Gmail, Google Sheets and Twilio

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Important notice

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

1. Workflow Overview

This workflow streamlines accounts receivable management by automatically monitoring invoices in Google Sheets and sending scheduled payment reminders. It is designed for businesses using Gmail and...

Best for

Invoice Processing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.formtrigger, n8n-nodes-base.wait, n8n-nodes-base.gmail, n8n-nodes-base.googlesheets, n8n-nodes-base.if, n8n-nodes-base.twilio, n8n-nodes-base.noop

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Send automated invoice payment reminders with Gmail, Google Sheets and Twilio
Workflow name: Send automated invoice payment reminders with Gmail, Google Sheets and Twilio

How it works

Watches for invoices: Triggers daily or via form submission to check for new entries.
First Follow-up (Day 7): Checks payment status one week after the invoice date. If unpaid, it sends a friendly email (and optional SMS).
Second Follow-up (Day 9): Re-checks status and sends a firmer reminder if funds are still not received.
Final Notice (Day 12): Sends a final urgent reminder before closing the cycle.
Smart Stopping: The workflow checks the 'Payment Status' column before every single message to ensure clients who have already paid are never disturbed.

Setup time: About 20 minutes.

Prerequisites: A Google Sheet with columns for Date, Email, and Payment Status.

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 - Sticky Note1

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

Block 2 - Invoice Form Submission Trigger

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

Block 3 - Wait 7 Days for First Follow-up

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

Block 4 - Send First Payment Reminder

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

Block 5 - Check Payment Status in Sheet - Day 7

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 6 - If Still Unpaid - First Check"

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

Block 7 - Send First SMS Reminder (Optional)

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

Block 8 - Wait 2 Days for Second Follow-up

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

Block 9 - Check Payment Status in Sheet - Day 9

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 10 - If Still Unpaid - Second Check

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

Block 11 - Send Second Payment Reminder Email

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

Block 12 - Send Second SMS Reminder (Optional)

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

Block 13 - Wait 3 Days for Final Follow-up

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

Block 14 - Check Payment Status in Sheet - Day 12

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 15 - If Still Unpaid - Third Check

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

Block 16 - Send Final Payment Reminder Email

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

Block 17 - Send Final SMS Reminder (Optional)

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

Block 18 - Sticky Note

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

Block 19 - Sticky Note4

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

Block 20 - Sticky Note5

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

Block 21 - Process Complete

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

3. Summary Table

Workflow	Send automated invoice payment reminders with Gmail, Google Sheets and Twilio
Complexity	advanced
Nodes	21
Categories	Invoice Processing
Author	Neal Mcleod
Published	18 Dec 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/11915/11915.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 Invoice Processing workflows

Frequently asked questions

What does Send automated invoice payment reminders with Gmail, Google Sheets and Twilio 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 Invoice Processing use case.

Neal Mcleod

3 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.formtrigger n8n-nodes-base.wait n8n-nodes-base.gmail n8n-nodes-base.googlesheets n8n-nodes-base.if n8n-nodes-base.twilio n8n-nodes-base.noop

Complexity

advanced

Published 18 Dec 2025

Likes 0

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Install path: /data/workflows/11915/11915.json

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Send automated invoice payment reminders with Gmail, Google Sheets and Twilio

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note1

Block 2 - Invoice Form Submission Trigger

Block 3 - Wait 7 Days for First Follow-up

Block 4 - Send First Payment Reminder

Block 5 - Check Payment Status in Sheet - Day 7

Block 6 - If Still Unpaid - First Check"

Block 7 - Send First SMS Reminder (Optional)

Block 8 - Wait 2 Days for Second Follow-up

Block 9 - Check Payment Status in Sheet - Day 9

Block 10 - If Still Unpaid - Second Check

Block 11 - Send Second Payment Reminder Email

Block 12 - Send Second SMS Reminder (Optional)

Block 13 - Wait 3 Days for Final Follow-up

Block 14 - Check Payment Status in Sheet - Day 12

Block 15 - If Still Unpaid - Third Check

Block 16 - Send Final Payment Reminder Email

Block 17 - Send Final SMS Reminder (Optional)

Block 18 - Sticky Note

Block 19 - Sticky Note4

Block 20 - Sticky Note5

Block 21 - Process Complete

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