Generate monthly invoices and chase overdue payments automatically

Creates client invoices every month and sends escalating reminder emails until overdue balances get paid.

How the work actually flows

It repeats. Repeats daily overdue recheck; runs once per each active client.

Pattern: Structured Loop (21) ยท Multiple Instances with a priori Run-Time Knowledge (14)

flowchart TD trig(["monthly billing date arrives"]):::trigtime s0[("Pull active client list")]:::store s1[["Generate invoice per client"]]:::mi s2["Log invoice and email client"]:::task s3[("Check spreadsheet for overdue invoices")]:::store s4["Send escalating reminder"]:::task trig --> s0 s0 -->|"one per each active client"| s1 s1 --> s2 s2 --> s3 s3 --> s4 lp{"invoice marked paid"}:::gate s4 --> lp lp -. "daily overdue recheck" .-> s3 lp -->|"finished"| out out[/"invoices billed and overdue payments recovered"/]:::out pay{{"steady cash flow without chasing"}}:::pay out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff
Starts itA stepRuns once per itemA record or sheetRepeat or finishResultPayoff
Build size
Standard

A mid-size build with several tools working together.

Business functions
Email AutomationImage & Media ProcessingSpreadsheet & Database OpsScheduling & CalendarFinance & Accounting
Connects
Google SheetsGmail

The problem it solves

Billing clients on time and then following up on late payments is a constant back-and-forth that's easy to forget in a busy month. Chasing overdue invoices feels awkward, so reminders often go out late or not at all, and cash flow suffers.

Who it fits

A freelancer, agency, or small business that bills clients on a recurring basis.

How it works

  1. On a set day each month, the system pulls the active client list
  2. It generates an invoice for each client and logs it in a spreadsheet
  3. The invoice is emailed to the client automatically
  4. Every day, it checks the spreadsheet for unpaid, overdue invoices
  5. It sends a gentle, follow-up, urgent, or final reminder based on how overdue the invoice is
What you get

Invoices that send and follow up on their own

Every month your client invoices go out automatically, and if a balance goes unpaid, reminder emails escalate on their own until it gets settled.

What you get

Monthly invoices delivered by email and a spreadsheet that tracks payment and reminder status for every client.

What you need

A Google Sheets account and an email account to send invoices and reminders from.

We can build this. But should you?

The hard question is not how to build it. It is whether this is the right thing to build first.

That is what a Fractional Chief AI Officer figures out with you, before anyone writes a line of code.

Let's Talk Strategy

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