What is your customer paying you to provide? I've had an issue with "time-based" cost for a long time. I've done freelance work since 2001, and I use time to es

What is your customer paying you to provide? I've had an issue with "time-based" cost for a long time. I've done freelance work since 2001, and I use time to estimate my projects (very roughly) and even to invoice it (based on what I had estimated for them). Many clients are comfortable with that. On larger projects, I even paid other developers and had them submit their time to get paid. But I have never tracked my own time or outlined it for a client. In fact, with those other developers, I just wanted to know "how much" time they spent so I could pay them. The applications we worked on had the features implemented as requested. The client was happy with what was delivered to them. While I did not track my time, I often found that I spent less time than I estimated. I say that because my freelance was on some evenings and weekends, and it simply didn't add up to a great amount of time. Once, I had a client over time, that often paid late, and we stopped working together when he had an outstanding bill. Much later, he contacted me with an urgent request. I got up front payment for twice what I estimated. Then I dug into the project and completed it in a tiny fraction of the time it took me to do it. If you contractually agree to give clients "dedicated time being truly productive towards creating the requested end result", then I suppose you really need to be meticulous about tracking your time and providing records of how that time was used to move the project forward. I'd really rather not get in the habit of selling my time at all. I'm selling my ability to reach your objective, to build what you want to use. We'll define to the best of our ability what I'll be providing to you, we'll agree on the price, and then we'll measure our success on my delivery to you and your payment to me. What happens in between is of my concern, and it is in my best interest to spend my time effectively and perform efficiently.