Just weeks after winning a Car of the Year award, the Tesla Model S is going up in price, the company announced today.

The base price of a Model S sedan, the electric car company's biggest attempt yet to break into the mainstream auto market, will go up by $2,500 from January 1 next year. The car currently begins at $57,400, before a $7,500 federal tax credit; that will go up to $59,900 next year.

Tesla...