Amount of eligible expenditures
The contractor can take a tax credit for the amount of the eligible expenditures, not to exceed $2,000 for a home that is between 20% and 39% above the International Energy Conservation Code 2003 (and any supplement in effect at the time of completion) or $4,000 for a home that is 40% or above of the Code. In addition, the heating and cooling efficiencies must meet the minimum requirements established by the National Appliance Energy Conservation Act of 1987 and building envelope improvements must account for a certain percentage of the reduced annual heating and cooling energy consumption levels.
The contractor can carryover any unused portion of the tax credit for up to 4 subsequent years. Credits earned after August 25, 2006 are freely transferable to any taxpayer upon the filing of a transfer agreement.