Authoritative publication Interior Design (USA)published information about the earnings of Western interior designers. Over the past three years, the average annual salary of American servants of beauty and comfort has increased from $213,000 to $246,000 on average. The authoritative publication Interior Design (USA) published information about the earnings of Western interior designers. Over the past three years, the average annual salary of American servants of beauty and comfort has increased from $213,000 to $246,000 on average. Architectural bureaus and studios providing interior design services have completed 13,700 projects and expect to increase this number to 15,000 by the end of the year. As for the average cost of work on a square foot (30.48 cm) of area, it has increased from $85 to $103. As it turns out, you can make money on a crisis, and quite well.