Send automated invoice payment reminders with Gmail, Google Sheets and Twilio — n8n Workflow

High complexity Trigger17 nodes🏷️ Invoice Processingby Neal Mcleod

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 Google Sheets that need a scalable alternative to complex accounting software.

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 o

Nodes used

Google SheetsTwilioGmail

Workflow Preview

Automated Invoice Payment Reminder
This workflow automates accounts receivable by monitori
First Follow-up Cycle
Waits 7 days after the invoice date. It checks the Goog
Second Follow-up Cycle
Waits an additional 2 days. Re-checks the payment statu
Final Follow-up Cycle
After 3 more days, this section performs a final status
I
Invoice Form Submission …
W
Wait 7 Days for First Fo…
Send First Payment Remin…
Check Payment Status in …
I
If Still Unpaid - First …
Send First SMS Reminder …
W
Wait 2 Days for Second F…
Check Payment Status in …
I
If Still Unpaid - Second…
Send Second Payment Remi…
Send Second SMS Reminder…
W
Wait 3 Days for Final Fo…
Check Payment Status in …
I
If Still Unpaid - Third …
Send Final Payment Remin…
Send Final SMS Reminder …
P
Process Complete
17 nodes18 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 17 nodes, connecting formtrigger, gmail, googlesheets.

  3. 3

    Output

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

Node Details (17)

GO

Google Sheets

googleSheets

#1
TW

Twilio

twilio

#2
GM

Gmail

gmail

#3

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 send-automated-invoice-payment-reminders-with-gmail-google-sheets-and-twilio 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": "Send automated invoice payment reminders with Gmail, Google Sheets and Twilio", "nodes": [...], ...}

Integrations

formtriggergmailgooglesheetsiftwiliowait

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes17
Complexityhigh
Triggertrigger

Created by

Neal Mcleod

Neal Mcleod

@ctk-industries

Tags

formtriggergmailgooglesheetsiftwiliowait

New to n8n?

n8n is a free, open-source workflow automation tool. Self-host it or use the cloud version.

Get n8n Free →

Related Invoice Processing Workflows

COCOEMEX+5
medium

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