Automation library · Money admin

Send overdue invoice reminders with Google Sheets

Started by a clock, and works across Gmail, GoHighLevel and Google Sheets. 11 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

Medium

11 stepsMedium: a working afternoon
1Branch: places the flow splits
1Loop or waits
3Services it connects to

The flow

Starts it 1Logic 2Service 8

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

  1. 1Schedule TriggerSchedule triggerStarts it
  2. 2Fetch Overdue InvoicesGoogle SheetsService
  3. 3Create / Update GHL ContactHigh LevelService
  4. 4Create GHL OpportunityHigh LevelService
  5. 5Send First Reminder EmailGmailService
  6. 6Wait 3 DaysWaitLogic
  7. 7Recheck Invoice StatusGoogle SheetsService
  8. 8Invoice Still Overdue?IfLogic
  9. 9Send Final Reminder EmailGmailService
  10. 10Mark Opportunity as WonHigh LevelService
  11. 11Create Collections TaskHigh LevelService

How it's built

Starts on
A clock
Steps
11, with 1 branch, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Gmail, GoHighLevel, Google Sheets
Model
None. This is plumbing, not judgement

Questions

What does it need to run?

An n8n account, plus your own Gmail, GoHighLevel and Google Sheets 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. 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.