# Send Stripe invoice reminders with Google Sheets and Slack: n8n workflow

> Started by an event in a connected app, and works across Email, Google Calendar, Google Sheets and Slack. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/send-stripe-invoice-reminders-with-google-sheets-and-slack (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 Stripe invoice reminders with Google Sheets and Slack

Started by an event in a connected app, and works across Email, Google Calendar, Google Sheets and Slack. It hands the judgement calls to OpenAI. 13 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI

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

**13 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**4** Services it connects to

## The flow

Starts it 1 Model 3 Logic 3 Service 6

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

- 1 **Stripe Invoice Trigger** Stripe trigger *Starts it*
- 2 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 3 **Structured Output Parser** Output Parser Structured *Model*
- 4 **Workflow Configuration** Set *Logic*
- 5 **Generate Payment Reminder** Agent *Model*
- 6 **Normalize Invoice Data** Set *Logic*
- 7 **Route by Payment Status** Switch *Logic*
- 8 **Log to Google Sheets** Google Sheets *Service*
- 9 **Notify Accountant on Slack** Slack *Service*
- 10 **Send Reminder Email** Email Send *Service*
- 11 **Generate Invoice PDF** Convert To File *Service*
- 12 **Schedule Follow-up** Google Calendar *Service*
- 13 **CRM Integration** Http Request *Service*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 13, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Email, Google Calendar, Google Sheets, Slack
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Email, Google Calendar, Google Sheets and Slack accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an event in a connected app.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 13 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 13 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-stripe-invoice-reminders-with-google-sheets-and-slack)
- **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.

[Email](https://millionrounds.com/workflows?service=Email#library)[Google Calendar](https://millionrounds.com/workflows?service=Google+Calendar#library)[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

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

- [**Compare proposals and analyze gaps for Salesforce CRM** 13 steps · calls a model · Google Drive, Google Sheets](https://millionrounds.com/workflow/compare-proposals-and-analyze-gaps-for-salesforce-crm)
- [**Extract invoice fields from Google Drive to Sheets with Ollama** 13 steps · calls a model · Google Drive, Google Sheets](https://millionrounds.com/workflow/extract-invoice-fields-from-google-drive-to-sheets-with-olla)
- [**Extract structured invoice data from JotForm PDFs with OpenAI** 13 steps · calls a model · Google Sheets](https://millionrounds.com/workflow/extract-structured-invoice-data-from-jotform-pdfs-with-opena)
- [**Generate tax compliance checklists from RSS with Gemini** 13 steps · calls a model · Google Sheets, RSS](https://millionrounds.com/workflow/generate-tax-compliance-checklists-from-rss-with-gemini)
- [**Recommend Salesforce quote pricing with Google Sheets and Groq** 13 steps · calls a model · Google Sheets, Salesforce](https://millionrounds.com/workflow/recommend-salesforce-quote-pricing-with-google-sheets-and-gr)
- [**Recover overdue invoices with OpenAI and Gmail** 13 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/recover-overdue-invoices-with-openai-and-gmail)