Stop keeping unpaid invoices in your head.

Collections Aging Desk is a one-file browser desk for solo 1099 / service operators. Log invoices with due dates and partial payments. It buckets open amounts (current, 1–30, 31–60, 61–90, 90+), writes three follow-up drafts you edit, and prints a report. Nothing is uploaded.

WHAT YOU GET
• collections-aging-desk.html — runs offline, no account
• aging.py + sample-ar.csv (Python 3.10+, no pip)
• example-output.md from that sample ($10,130.00 open AR as-of 2026-09-15: current $2,000, 1–30 $3,360, 31–60 $1,650, 90+ $3,120)
• Personal or commercial license

HOW IT WORKS

1. Open the HTML file
2. Load the sample or type your invoices
3. Pick polite / firm / final on an open row
4. Print or export CSV

NOT THIS
Educational aging arithmetic. Not a collection agency, not legal advice, and not a promise anyone will pay. 365-day download access (you keep the files you downloaded). 7-day refund if the HTML will not run or aging.py errors on sample-ar.csv.