Urban Air Mobility (UAM) is a new, safe and efficient air transport system in which people and goods are transported by crossing urban areas using electric vertical take-off and landing aircraft. In order for this innovative transportation system to be truly deployed worldwide, it needs to be cost-effective compared to ground-based competitors. Therefore, the goal is to develop a development and production cost estimation model for eVTOL. Several well-known companies are already developing their eVTOL in order to bring them to market as soon as possible. The design data of the different aircraft (powered lift and multicopter) were first obtained by estimating the weight of the individual components, and then the various models were implemented on MatLab software, obtaining as output the estimated costs of the different subsystems.