I have an arrangement with a couple of my regular clients whereby there's a regularly scheduled conference call to chat about various work being done and also new stuff coming down the pipe.
At first I never billed for this time, since some of it was spent on sales-y stuff like discussing potential new projects, etc. It also just seemed like a nice way to build goodwill.
Over time, however, this has become problematic and I feel like I'm being taken advantage of. We're a small shop and often as many as 3 people need to attend these conference calls. For a 90 minute call, that's around $500 of potentially billable time that's being given away for free. Considering these calls happen once per week for a couple of different clients, and it adds up to something like $5K/month in lost (potential) revenue.
What are standard industry practices around this kind of thing? Should I insist on billing for this time? Or is that being greedy and was my initial instinct not to bill correct?