This is going to depend so much on the cost of living where you are and what services/qualifications you offer. For example, the cost of a basic groom in NYC or San Fran is going to be astronomical compared to somewhere like Memphis. Your best bet would be to check what your local competitors are charging for which services. Also keep in mind that cost is often highly variable based on dog size, breed, coat type, etc. and many groomers charge on a sliding scale with this in mind.
And this is a field where experience matters. Many average pet owners who just want a bath, trim, and nail clip or a deshedding treatment will probably be looking for a bargain, but your value will go up a lot if you're Fear Free Certified, or if you're certified in pet first aid, have credentials from a quality groomer training program, etc. Potentially also if you're skilled in breed specific/show grooms or creative grooming, but that will depend heavily on the demographic you're serving. You can definitely charge more if you can specifically cite what you offer that's 'above and beyond'.
And this is a field where experience matters. Many average pet owners who just want a bath, trim, and nail clip or a deshedding treatment will probably be looking for a bargain, but your value will go up a lot if you're Fear Free Certified, or if you're certified in pet first aid, have credentials from a quality groomer training program, etc. Potentially also if you're skilled in breed specific/show grooms or creative grooming, but that will depend heavily on the demographic you're serving. You can definitely charge more if you can specifically cite what you offer that's 'above and beyond'.