If you invoice more than a couple of clients, keeping track of who owes what — and for how long — gets hard fast without a dedicated system. This ledger tracks every invoice by customer, with automatic running balances, so nothing slips through unnoticed.
Included in the $7/mo Tools Club · Works in Excel or Google Sheets · Includes a built-in AI prompt
Tracking who owes you money from memory or scattered invoice emails means something eventually gets missed. A dedicated ledger gives you one place to see every customer’s outstanding balance at a glance, instead of reconstructing it from your inbox every time you need to know.
Download and open in Excel or Google Sheets
Requires a Tools Club membership — log in first to access the file.
Set up a row for each customer
Group multiple invoices under the same customer to see their total outstanding balance.
Log every invoice as you send it
Amount, invoice date, and due date, tied to the right customer.
Record payments as they come in
Mark each invoice paid and watch the running balance update automatically.
Run the built-in AI prompt periodically
Attach the saved file to ChatGPT or Claude and ask which customers are trending toward chronic late payment.
Built-in AI prompt
Once you've filled this template in, it includes a ready-to-use prompt at the bottom of the sheet. Attach your saved file to ChatGPT, Claude, or any AI chat tool and paste it in — you'll get plain-English feedback on which customers are trending toward chronic late payment, and which overdue balances are worth following up on first, no accounting background required.
Not updating it the moment an invoice is sent
The ledger is only useful if it stays current — log every invoice immediately, not in a weekly batch.
Forgetting to record partial payments
A customer who pays part of an invoice needs that partial payment reflected, or the outstanding balance will be wrong going forward.
Losing track of very old outstanding invoices
The oldest unpaid invoices are the ones most likely to become uncollectible — review anything significantly overdue regularly, not just recent invoices.
Mixing this up with your revenue figures
Revenue is recognized when earned, not when collected — this ledger tracks what’s owed, separate from your P&L revenue recognition.
70+ editable templates, each with a built-in AI prompt. $7/month, cancel anytime.
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