Automated Invoice Follow-ups with Smart Response Tones via Google Sheets & Email β€” n8n Workflow

Medium complexity⏰ Scheduled6 nodes🏷️ Invoice Processingby Marth - Business Automation

Overview

πŸ” How It Works This AI Agent checks your invoice database (Google Sheets) daily and looks for unpaid invoices that are past their due date. It calculates how many days each invoice is overdue (Days Past Due / DPD), then automatically crafts a follow-up message with an appropriate tone:

1–7 days overdue: Friendly reminder 8–14 days overdue: Slightly firm nudge 15+ days overdue: Final warning tone

After generating the message, it sends the follow-up via email to the client and logs the interact

Nodes used

Send EmailGoogle Sheets

Workflow Preview

Flow
AI Invoice & Payment Follow-Up Agent
🧨 Problem
Freelancers, agencies, and businesses often deal with l
⚑
D
Daily Trigger
Load Invoices
F
Filter Overdue Invoices
C
Calculate DPD
G
Generate Message
Send Email
6 nodes5 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a scheduled trigger, running on a defined schedule.

  2. 2

    Process

    Data flows through 6 nodes, connecting cron, emailsend, function.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (6)

SE

Send Email

emailSend

#1
GO

Google Sheets

googleSheets

#2

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows β†’ New β†’ Import from file.
  3. 3Select the downloaded automated-invoice-follow-ups-with-smart-response-tones-via-google-sheets-email file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n β†’ Import from JSON:

{ "name": "Automated Invoice Follow-ups with Smart Response Tones via Google Sheets & Email", "nodes": [...], ...}

Integrations

cronemailsendfunctiongooglesheets

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes6
Complexitymedium
Triggerscheduled

Created by

Marth - Business Automation

Marth - Business Automation

@marth

Tags

cronemailsendfunctiongooglesheets
⚑

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Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpointβ€”the billβ€”is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

πŸ”— WebhookΒ·12 nodes