# Send invoice payment reminders with Gmail and Google Sheets: n8n workflow

> Started by someone submitting a form, and works across Gmail, Google Sheets and Twilio. 17 steps, 3 branches, 3 loops or waits: a working afternoon to...

Source: https://millionrounds.com/workflow/send-invoice-payment-reminders-with-gmail-and-google-sheets (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Money admin](https://millionrounds.com/workflows?category=Money+admin#library)

# Send invoice payment reminders with Gmail and Google Sheets

Started by someone submitting a form, and works across Gmail, Google Sheets and Twilio. 17 steps, 3 branches, 3 loops or waits: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-invoice-payment-reminders-with-gmail-and-google-sheets)

**17 steps** Medium: a working afternoon

**3** Branches: places the flow splits

**3** Loops or waits

**3** Services it connects to

## The flow

Starts it 1 Logic 7 Service 9

The steps in the order they run, from what starts it.

- 1 **Invoice Form Submission Trigger** Form trigger *Starts it*
- 2 **Wait 7 Days for First Follow-up** Wait *Logic*
- 3 **Check Payment Status in Sheet - Day 7** Google Sheets *Service*
- 4 **If Still Unpaid - First Check"** If *Logic*
- 5 **Process Complete** No Op *Logic*
- 6 **Send First Payment Reminder** Gmail *Service*
- 7 **Send First SMS Reminder (Optional)** Twilio *Service*
- 8 **Wait 2 Days for Second Follow-up** Wait *Logic*
- 9 **Check Payment Status in Sheet - Day 9** Google Sheets *Service*
- 10 **If Still Unpaid - Second Check** If *Logic*
- 11 **Send Second Payment Reminder Email** Gmail *Service*
- 12 **Send Second SMS Reminder (Optional)** Twilio *Service*
- 13 **Wait 3 Days for Final Follow-up** Wait *Logic*
- 14 **Check Payment Status in Sheet - Day 12** Google Sheets *Service*
- 15 **If Still Unpaid - Third Check** If *Logic*
- 16 **Send Final Payment Reminder Email** Gmail *Service*
- 17 **Send Final SMS Reminder (Optional)** Twilio *Service*

## How it's built

- **Starts on:** Someone submitting a form
- **Steps:** 17, with 3 branches, 3 loops or waits
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Google Sheets, Twilio
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Sheets and Twilio accounts. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone submitting a form.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 17 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 17 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-invoice-payment-reminders-with-gmail-and-google-sheets)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Twilio](https://millionrounds.com/workflows?service=Twilio#library)

## Workflows like it

Also money admin, with the same services where possible, closest in size first.

- [**An workflow that processes receipts from images.** 17 steps · Google Drive, Google Sheets](https://millionrounds.com/workflow/an-workflow-that-processes-receipts-from-images)
- [**Fast-track expense reimbursements with UploadToURL** 17 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/fast-track-expense-reimbursements-with-uploadtourl)
- [**Handle retail payment failures with Slack and Supabase** 17 steps · Gmail, Slack](https://millionrounds.com/workflow/handle-retail-payment-failures-with-slack-and-supabase)
- [**Invoice creator with Google Sheets** 17 steps · Email, Google Sheets](https://millionrounds.com/workflow/invoice-creator-with-google-sheets)
- [**Route multi-step expense approvals with Gmail and HTTP API** 17 steps · Gmail](https://millionrounds.com/workflow/route-multi-step-expense-approvals-with-gmail-and-http-api)
- [**Send Mercado Pago billing links and reminders** 17 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/send-mercado-pago-billing-links-and-reminders)