It isn't cut and dried. As a home buyer, it always annoyed me that builders wanted $50/receptacle for additional ones. What I wanted was additions to existing circuits, not new dedicated ones. Should only require another box, receptacle, a few extra feet of wire, and the time to terminate it (wanted outlets spaced at 8' instead of the normal 12'). This was 15 years ago, so I'm sure the cost is higher now.
If these are all dedicated receptacles, so you have a home run, breaker, etc, then it will certainly cost much more than an extra outlet on an existing circuit. If you run out of panel space, that is even worse. If an AFCI breaker is required, that's something else to consider.