Art appraisal costs depend largely on three factors: the intended use of the appraisal, the type of art being appraised, and the number of pieces being appraised. While some appraisers may charge a flat fee, many appraisers charge an hourly rate. Fine art appraisers typically have advanced degrees, professional certifications, and continuing education requirements— so you should expect that hourly rates are generally in line with other professional service rates in your area, such as CPAs or lawyers. Art appraisers may adjust their hourly rate depending on the scope of the appraisal assignment, but on average you should expect to pay between $150-$500 per hour for a USPAP-compliant art appraisal. The set hourly rates depend on the appraiser’s experience, location, and specializations and an art appraiser's fees should never be based on a percentage of the value of the artwork.