Free Web Developer Invoice Template

Developers typically invoice hours worked, fixed-price milestones or monthly maintenance retainers. List each clearly so clients can match it to the agreement.

Typical line items

Development – sprint 1 (hours × rate)
Fixed-price milestone: homepage and CMS setup
Monthly maintenance retainer
Third-party costs passed through (e.g. domain, plugins)
Bug fixes outside scope (hourly)

What to include

Your name or business name, address and contact details
The client's name and address (and VAT number for EU B2B work)
A unique invoice number, issue date and due date
Clear descriptions, quantities and rates, then subtotal, tax and total
Payment details such as your IBAN

Tips

Reference the project or purchase order number.
Separate pass-through costs from your own fees.
For retainers, mention the period covered (e.g. October 2026).

Open the Billowly invoice generator, add the line items above, and download a PDF. Your details are saved in your browser for next time.

Create your invoice now →