This paper introduces a new method for determining the appropriate rent for retail properties. The method was developed based on the authors' extensive experience in valuing retail leases. By using a step-by-step process and a specialized software program, the authors have created a more accurate way to evaluate the "reasonable rent" for a retail lease. This method aims to address the current shortcomings in how retail properties are valued, which can have significant impacts on tenants, property owners, and the retail industry as a whole. The approach outlined in the paper is designed to meet the requirements of IFRS 16 and is expected to become an industry standard for valuing retail leases.