[knewter]

We invoice weekly. Depending on our terms with the client, if they aren't paying on time we stop work. This results in at-most 2 weeks of unpaid work, and typically they have a lot invested in seeing it through to completion because already have (largeish-n)% of their money. We also send emails EVERY TIME a work unit is created in xrono (our open source app-to-run-a-software-consultancy) showing both the current work and their current uninvoiced total.

Our clients never, ever, ever tell us that they were unaware of how much money they'd agreed for us to spend without us laughing a lot. It typically ends well.

[anthonyb]

I refer to this as a "cash leash", and it's a very good idea, particularly in the early days before you can hire lawyers to create contracts and write letters to non-payers.