Capstone project · about 90 minutes
Invoicing and Aged Debtors Engine 🧾
Price invoice lines with discounts and VAT bands using Decimal, track part payments, and produce the aged debtors report every business runs.
Money in floats is a bug waiting for an auditor. This project uses Decimal properly, applies VAT per line rather than to a total, and ends with the report every small business actually needs: who owes what, and how late. It is the most directly sellable thing on this site, and plenty of freelancers would pay for…
This is a Pro project. Six portfolio projects are free, so you can see how they work before deciding.