A Notion invoice tracker that emails you what's overdue

The problem: you only notice late invoices when it's too late

Clients live in email, invoices in a spreadsheet, deals in your head. A freelancer invoice tracker only helps if you open it, and on a busy week you don't.

Can Notion send email reminders?

Notion can remind you inside Notion, but it won't email you a summary of what's overdue. Solo Operator Stack adds n8n, an automation tool you can self-host for free or run on n8n Cloud (paid plan). n8n reads your Notion databases and emails you. Your Sunday digest arrives at 09:00 by default, you pick the time, straight to your inbox.

What's inside

1. The Notion workspace

7 connected databases: Clients, Projects, Pipeline, Content, Finance, Weekly Reviews, SOPs & Prompts. Plus a Command Center, a Sunday Review page and a Start here page. Sample data included. Works on Notion Free or Plus.

2. Six import-ready n8n workflows

• W1 New lead → Client + Pipeline: a form lead becomes a new client and deal in Notion
• W2 Overdue invoice reminder: a daily check of Finance, email to you when something is overdue
• W3 Cold pipeline nudge: an email about deals with no update for a while
• W4 Content idea capture: POST your idea to a webhook (/webhook/solo-operator-idea) and it lands in your Content database as Status=Idea
• W5 Sunday digest: overdue money, active projects, cold deals and content due in one email
• W6 Project done → closeout: an email with the closeout checklist

W1 and W4 add rows to Notion. The others only read your databases and email you. None of them creates or sends invoices. Each workflow comes with a CONFIG node, a README and test steps. Automations are optional: the Notion workspace works on its own.

3. 10 AI prompts + 10 SOPs

For clients, cash, content and your weekly review. Each one says when to use it, what to put in and what you get out.

What you'll need

• Notion (Free works) with a free internal integration
• n8n, self-hosted or n8n Cloud
• An email account for n8n to send from (SMTP or Gmail)

Who it's for

Freelancers and solopreneurs who want one weekly rhythm for clients, cash and content.

Who it's not for

Agencies needing a multi-seat CRM. Anyone wanting a full invoicing or time-tracking replacement.

FAQ

Do I need to know n8n?

You don't build anything from scratch: import the file, fill in the CONFIG node with help from the README, and run the test steps.

Does it work with other automation tools?

No, the workflows are built for n8n only.

Already have the Client Ops Kit?

Within 30 days of purchase, email your Gumroad receipt to [email protected] and get Solo Operator Stack for $50. There is no discount code.

Is my data safe?

Your data stays in your Notion and your n8n. No hardcoded tokens.

Refunds?

14-day money-back. Email [email protected] for a full refund.