Any time you hear yourself thinking "I'll quote this part of the project based on my hourly rate", please at least use a daily rate. You're a sought-after professional in a white hot market. You don't do partial days.
A customer that's worth bending that far backwards for is worth a couple hours gratis. Everyone else can just pay your daily.
Every quantum of time higher than "hourly" is more favorable to you. Data entry temps might look attractive at their hourly rate, but developers have frightening hourly rates. Even just doing your quotes in chunks of eight hours frees your client up to think about how much you can get done in a day. Nothing gets done in an hour.
You have a 1-day minimum. Think of it this way: there is no way you can expect to be effective working for two different clients 4 hours each in a single day. It takes too much time just to get back into flow. So any time you quote less than a day, you're either giving the client the rest of your availability that day for free, or you're stealing it from another client.
In my experience working on one thing for 8 hours isn't the most effective way to work. I find myself more effective when working on multiple tasks in one day if they require thinking effort. A lot of the thinking doesn't get done when sitting in front of your keyboard, but rather when you are taking a shower or taking a walk. But passively thinking about a single thing during those activities doesn't exploit your thinking potential fully. You can't think that far ahead.
If you have two projects you're working on, you can think a bit on one, and when you're stuck you think a bit on the other. When it actually comes to working, you have enough new material to work for a couple of hours on each project. This working will uncover new things to think about. If you instead work for 8 hours straight on a single thing, then after a couple of hours you'll hit things that require thinking before you can proceed, and doing that in front of your computer doesn't work but taking a walk or taking a shower isn't billable -- and even if it were I'd still get more work done when working on more than one project.
I don't want to touch this developer workday thing with a 20 foot pole. Work however is productive for you to work. But don't communicate to your customer that you are billable in increments smaller than a day.
I wish I could upvote your comment more. Never thought about this subject this particular way (probably because of my lack of experience). Thank you very much.
A customer that's worth bending that far backwards for is worth a couple hours gratis. Everyone else can just pay your daily.
Every quantum of time higher than "hourly" is more favorable to you. Data entry temps might look attractive at their hourly rate, but developers have frightening hourly rates. Even just doing your quotes in chunks of eight hours frees your client up to think about how much you can get done in a day. Nothing gets done in an hour.
You have a 1-day minimum. Think of it this way: there is no way you can expect to be effective working for two different clients 4 hours each in a single day. It takes too much time just to get back into flow. So any time you quote less than a day, you're either giving the client the rest of your availability that day for free, or you're stealing it from another client.