To determine where (and if) electric vehicles make financial sense, SmartAsset compared total costs of ownership for three of the most popular EVs–the Tesla Model S, the Ford Focus EV and the Nissan Leaf–to ownership costs of their gasoline-powered equivalents. In our analysis, we considered retail price for a new vehicle (although buying used may be the smarter choice), fuel and energy prices, state and local taxes, state and federal subsidies and average miles driven.