15-31-151. Credit for preservation of historic buildings. (1) (a) There is allowed as a credit against the taxes imposed by 15-31-101, 15-31-121, and 15-31-122 a percentage of the credit allowed for qualified rehabilitation expenditures, with respect to any certified historic building located in Montana, as provided in 26 U.S.C. 47 or as that section may be renumbered or amended.

(b) The amount of the credit allowed for a tax year is 25% of the amount of the credit determined under 26 U.S.C. 47(a)(2) or as that section may be renumbered or amended.

(2) The credit allowed by this section may not be refunded if the taxpayer has a tax liability less than the amount of the credit. If the sum of credit carryovers from the credit, if any, and the amount of credit allowed by this section for the tax year exceeds the taxpayer's tax liability for the current tax year, the excess attributable to the current tax year's credit is a credit carryover to the 7 succeeding tax years. The entire amount of unused credit must be carried forward to the earliest of the succeeding years, and the oldest available unused credit must be used first.

(3) If the credit under this section is claimed by a small business corporation, as defined in 15-30-3301, or a partnership, the credit must be attributed to shareholders or partners, using the same proportion used to report the corporation's or partnership's income or loss for Montana income tax purposes.