Earlier quoted context omitted.
If you can't accept fixed bid contracts you won't be doing much work in quite a few places. Fixed bid contracts are the way vast segments of the industry work. Not being able to do fixed bid work basically says "I'm bad at estimating and don't know how to control scope creep". Of course you can do fixed bid contracts. But you'll have to make an ironclad arrangement about what is to be done within the scope of the con…
So my first consulting contract ended up taking 5 months (calendar time, not near 100% utilization) where I thought it would take about 1, due to a combination of "consulting learning curve", scheduling conflicts, and scope creep. Both my client and I are pretty happy with how it worked out. I charged him an hourly rate and quoted my rough estimate for how long the work originally in scope would take. When I ended up…
I think that alone is a source of a large part of the trouble, customers and suppliers talking at cross purposes during the negotiation phase.
I've mostly done 'fixed price' work, and I like it a lot because both the customer and you know what is going to happen and when a job will be done. It also sets a very good barrier against scope creep, because it means they'll have to go back to get approval again, whereas if they stick to the deal as made it'll be delivered on time and within their original budget. On metered time there is no such barrier.
Fixed price is good, if you only do hourly jobs try doing a bunch of smaller jobs on a fixed price basis to get more experience with estimating and negotiating.