How long is to long - 60 days, most of my clients pay me either every week, every 2 weeks or monthly. Some times 1-2 invoices get missed and with 1 phone call they get handled.

I have pretty much terminated business relationships with clients who have gone out on me 60-90 days. My viewpoint is trouble, it means that they are in trouble financially, I have lost ALOT of money in the years that I have been in business because I was trusting and stupid, that has since changed.

Call Dunn and Bradstreet, they have a collections department and if the company doesn't pay up it goes on their company credit, personally I wouldn't wait more than 60 days to start collections. Especially if the client is not responsive.

If they aren't paying you what makes you think they will pay late fee's or penalties, I seriously doubt they would.

If you have made an effort to collect your money and the client has lied to you saying payment would be sent out and it never arrived I would post right away. If they aren't paying you they are in financial trouble so handle it right away or you may end up with nothing!