Bill Maclay, Principal of Maclay Architects, shared a tested and proven financial methodology which demonstrated that positive energy buildings are typically the least cost option on a cash flow basis when compared to fossil fuel code buildings. Net Zero projects also accrue long term financial, social equity, ecological, and health benefits. Maclay Architects has developed and successfully used this process for over 12 years to assist owners in evaluating financial performance of positive energy buildings. Commercial, institutional, nonprofit and other residential case studies illustrate the detailed and interwoven financial/energy analysis process, metrics, and templates used to guide positive energy projects from initiation to completion. This includes the design and financial analysis of a net positive energy, plus carbon storing, single family home design that meets the current need for cost effective operational and embodied energy buildings and design.