$3,557 is the current lease incentive portion that Ford gives back to you for the tax credit (just ordered my 2015 for lease this past weekend). However, the tax credit for the 2015 for purchasers will be the same as the 2014 since the tax credit is a predetermined calculation based on the size of the battery included in the vehicle (the Volt gets like 35 miles on charge and gets the full 7500 for example). Quote from IRC 30D doc: "For vehicles acquired after December 31, 2009, the credit is equal to $2,500 plus, for a vehicle which draws propulsion energy from a battery with at least 5 kilowatt hours of capacity, $417, plus an additional $417 for each kilowatt hour of battery capacity in excess of 5 kilowatt hours. The total amount of the credit allowed for a vehicle is limited to $7,500."