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Gridwork Systems
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Meet the Invoice & Payment Tracker

The who-owes-us-what notebook, retired: a $19 register that ages invoices automatically and hands you the Monday call list.

Product release2 min readGridwork Systems · Nov 2026

The "who owes us what" notebook, retired. A $19 register that ages your invoices automatically and hands you the Monday call list.

Invoice register with aging buckets
Invoice register with aging buckets

Every business that invoices has a second, unpaid job: remembering who owes what, how late, and who needs chasing. Most people run that job from memory and a notebook. Memory doesn't scale, and neither does the queasy Monday-morning reconstruction.

What it does

The paper trail that becomes your money story.
The paper trail that becomes your money story.

Log each invoice once — client, amount, due date — and the tracker does the rest:

Monday priority list
Monday priority list

The Monday routine it enables

The 31–60 bucket gets a call, not an email.
The 31–60 bucket gets a call, not an email.

Open the aging view. Anyone entering the 31–60 bucket gets a call — not an email, a call. Anyone past 60 gets a decision made on purpose: prepayment, pause, or a payment plan with dates. Fifteen minutes, and your receivables stop being a mood and start being a system.

The paperwork that becomes a money story
The paperwork that becomes a money story

Who it's for

Service businesses billing on terms, solo founders tired of spreadsheet archaeology, and anyone whose cash position has ever been hijacked by a "good client" who pays in seventy days.

Get it

Invoice & Payment Tracker — $19 one-time, instant download, works in Excel and Google Sheets, lifetime updates, 14-day refund. Or start with the free cashflow forecaster and upgrade when the notebook overflows.

Tracking tool, not accounting advice.

See exactly what's inside

Full breakdown, screenshots and pricing on the product page.

View the product