Billfold

What makes an invoice hold up: a unique number so you and your client can both reference it, clear dates, itemized work rather than one lump sum, and payment terms stated plainly. Those are what get an invoice paid and what matter if it's ever disputed. This tool generates the PDF on your own machine, so your client list and rates never pass through anyone else's server. It handles the document, not the bookkeeping — tax rules vary by state and trade, so check what your situation actually requires.