Let's say I provide services for my clients (consulting/programming/training, etc.) but the services are provided on demand at the clients' request.
I want to charge a fixed monthly fee to cover my fixed expenses.
I can't charge a lot because the clients are not sure how many of my hours are going to need every month, so they may feel they are overpaying.
I can't charge only per-event hours, because I need a minimum income to cover the fixed office expenses. Call it the cost of "being available"
What I would like to do is to charge each client a minimum monthly fee, probably including some “free” hours, but if a month I work many hours for a client, I should be able to invoice him or her extra hours in addition to the monthly fee.
- Is this arrangement common?
- How is it called?
- Is there a sample agreement text available online?