Design costs scale with scope and complexity. A UX audit and redesign of an existing product typically costs $5,000 to $20,000. End-to-end UX/UI design for a new mobile or web application, covering research, wireframes, interactive prototypes, and a design system, costs $20,000 to $80,000. Enterprise-scale product design with multiple user personas, complex interaction patterns, accessibility requirements, and a full component library runs $80,000 to $200,000 or more. Design is one of the highest-ROI investments in any product: Forrester research shows every $1 invested in UX returns approximately $100, largely by reducing downstream development rework and user support costs.