Automation library · Money admin

Chase overdue invoice payments with Google Sheets and Gemini

Started by a clock, and works across Gmail, Google Sheets and Slack. It hands the judgement calls to Gemini. 11 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: Gemini

Download free
11 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 2Logic 2Service 6

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

  1. 1Schedule Daily CheckSchedule triggerStarts it
  2. 2Google Gemini Chat ModelLm Chat Google GeminiModel
  3. 3Get Unpaid InvoicesGoogle SheetsService
  4. 4Write Reminder with GeminiChain LlmModel
  5. 5Compute Days OverdueCodeLogic
  6. 6Route by StageSwitchLogic
  7. 7Send Gentle ReminderGmailService
  8. 8Send Firm ReminderGmailService
  9. 9Send Final NoticeGmailService
  10. 10Update Last ReminderGoogle SheetsService
  11. 11Alert Finance TeamSlackService

How it's built

Starts on
A clock
Steps
11, with 1 branch
Size
Medium: a working afternoon
Connects to
Gmail, Google Sheets, Slack
Model
Gemini

Questions

What does it need to run?

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

What starts it?

It starts on a clock.

Does it use AI?

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

How long does it take to set up?

Plan an afternoon. 11 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 11 steps before you point it at anything that matters.