I’ve found that a lot of clients are much more comfortable with an hourly billing arrangement, and there are definitely situations where there’s no better option, like when the amount of work depends on factors outside of your and my control (like a third party’s consent, for example).
For hourly work, I charge a rate of $300 per hour. I offer new clients a promotional discount of $50 per hour off for the first month or two of working with me; if your business is very early stage, I may offer this discount for longer and/or a steeper discount.
I’m also happy to offer better rates if your business or project has a compelling social mission, is led by or serves members of a marginalized community, and so on.