[alex_c]

I will admit it took me an embarrassingly long time to learn this lesson and become disciplined enough to do it.

But it really is better for everyone involved, clients don't like late or unpredictable invoices either!

[josefresco]

Detaching emotion from billing is important. Sometimes I would hesitate to bill because of a recent bug or miscommunication. Hug error on my part. Everyone gets billed every month no matter that status of your project. I also will bill some clients EARLY if I'm concerned, they won't pay or will balk.