Hire UI UX designer depends on the nature of the product. If you hire a UI UX developer from a UI UX design agency, they will charge a fee based on the project, and the UI/UX design agency will estimate the time and resources spent on your project. They look at the project's scope, estimate the number of hours, and then multiply the number of hours by their hourly rate. They added a few hours of buffer time and sent quotes. However, freelance UI UX designer can freely set their rates based on their own experience. Freelance UX designer rates on the market range of $25/hour, while high-end hourly rates may be as high as $300/hour. Or more! On average, a UI UX freelance designer will cost you $80/hour.