# WhatsApp AI Receipt and Expense Tracker for n8n: n8n workflow

> Started by another system calling it, and works across Google Drive, Google Sheets and WhatsApp.

Source: https://millionrounds.com/workflow/whatsapp-ai-receipt-and-expense-tracker-for-n8n (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)

# WhatsApp AI Receipt and Expense Tracker for n8n

Started by another system calling it, and works across Google Drive, Google Sheets and WhatsApp. 18 steps, 3 branches: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fwhatsapp-ai-receipt-and-expense-tracker-for-n8n)

**18 steps** Medium: a working afternoon

**3** Branches: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 1 Logic 9 Service 8

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

- 1 **WA Finance Inbox POST** Webhook *Starts it*
- 2 **Normalize Event** Code *Logic*
- 3 **Is Command?** If *Logic*
- 4 **Parse Extraction** Code *Logic*
- 5 **Has Media?** If *Logic*
- 6 **Is Command Response?** If *Logic*
- 7 **Get WhatsApp Media URL** Whats App *Service*
- 8 **Build Text AI Payload** Code *Logic*
- 9 **Reply on WhatsApp** Whats App *Service*
- 10 **Read Existing Expenses** Google Sheets *Service*
- 11 **Download Media Binary** Http Request *Service*
- 12 **Call OpenRouter Extractor** Http Request *Service*
- 13 **Check Duplicate** Code *Logic*
- 14 **Prepare Media Evidence** Code *Logic*
- 15 **Append Expense Row** Google Sheets *Service*
- 16 **Upload Evidence to Drive** Google Drive *Service*
- 17 **Append Document Log** Google Sheets *Service*
- 18 **Build Media AI Payload** Code *Logic*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 18, with 3 branches
- **Size:** Medium: a working afternoon
- **Connects to:** Google Drive, Google Sheets, WhatsApp
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

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

What starts it?

It starts on another system calling it.

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. 18 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 18 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%2Fwhatsapp-ai-receipt-and-expense-tracker-for-n8n)
- **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.

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

## Workflows like it

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

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- [**Handle WhatsApp course enrollment and payments with Wati** 18 steps · Google Sheets](https://millionrounds.com/workflow/handle-whatsapp-course-enrollment-and-payments-with-wati)
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- [**Send proposal follow-ups and update deals with HubSpot** 18 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/send-proposal-follow-ups-and-update-deals-with-hubspot)