I work around this by using decimal quantities in my current invoices (i.e. 0.3 for 30%) but the projects section does not track this well, and I have to remember to check all of the previous invoices to make sure that I have the correct quantity. I use ZOHO to invoice for my consulting engineering business. I rarely need to invoice based on hours, but frequently need to invoice a project over the course of four months up to a year. Percentage based invoicing, with integrated percentage progress tracking for the project, would be awesome for me.
I work around this by using decimal quantities in my current invoices (i.e. 0.3 for 30%) but the projects section does not track this well, and I have to remember to check all of the previous invoices to make sure that I have the correct quantity. I use ZOHO to invoice for my consulting engineering business. I rarely need to invoice based on hours, but frequently need to invoice a project over the course of four months up to a year. Percentage based invoicing, with integrated percentage progress tracking for the project, would be awesome for me.