# Detect payroll discrepancies with Google Sheets and Slack: n8n workflow

> Started by a clock, and works across Gmail, Google Sheets and Slack. 13 steps, 2 branches: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/detect-payroll-discrepancies-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)

# Detect payroll discrepancies with Google Sheets and Slack

Started by a clock, and works across Gmail, Google Sheets and Slack. 13 steps, 2 branches: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fdetect-payroll-discrepancies-with-google-sheets-and-slack)

**13 steps** Medium: a working afternoon

**2** Branches: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 1 Logic 5 Service 7

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

- 1 **Monthly Pre-Payroll Trigger** Schedule trigger *Starts it*
- 2 **Get Current Pay Run** Google Sheets *Service*
- 3 **Get Previous Pay Run** Google Sheets *Service*
- 4 **Detect Discrepancies** Code *Logic*
- 5 **Has Anomalies** If *Logic*
- 6 **Classify Severity** Set *Logic*
- 7 **Slack All Clear** Slack *Service*
- 8 **Is Critical Block** If *Logic*
- 9 **Slack Critical Hold** Slack *Service*
- 10 **Log Anomaly to Sheet** Google Sheets *Service*
- 11 **Email HR Review** Gmail *Service*
- 12 **Build Run Digest** Code *Logic*
- 13 **Slack Digest to Finance** Slack *Service*

## How it's built

- **Starts on:** A clock
- **Steps:** 13, with 2 branches
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Google Sheets, Slack
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

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

What starts it?

It starts on a clock.

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. 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%2Fdetect-payroll-discrepancies-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.

[Gmail](https://millionrounds.com/workflows?service=Gmail#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.

- [**Classify invoices and route them to Google Drive with Slack** 13 steps · Google Drive, Slack](https://millionrounds.com/workflow/classify-invoices-and-route-them-to-google-drive-with-slack)
- [**Extract invoice data from Gmail PDFs to JSON, Google Sheets** 13 steps · Airtable, Gmail](https://millionrounds.com/workflow/extract-invoice-data-from-gmail-pdfs-to-json-google-sheets)
- [**Extract invoice data from Telegram to Gmail and Google Drive** 13 steps · Gmail, Google Drive](https://millionrounds.com/workflow/extract-invoice-data-from-telegram-to-gmail-and-google-drive)
- [**Recover failed Stripe payments with Claude and Gmail** 13 steps · Gmail](https://millionrounds.com/workflow/recover-failed-stripe-payments-with-claude-and-gmail)
- [**Sync OVH invoices to Google Sheets and save PDFs to Google Drive** 13 steps · Google Drive, Google Sheets](https://millionrounds.com/workflow/sync-ovh-invoices-to-google-sheets-and-save-pdfs-to-google-d)
- [**Tax deadline management & compliance alerts with OpenAI** 13 steps · Email, Google Sheets](https://millionrounds.com/workflow/tax-deadline-management-and-compliance-alerts-with-openai)