Montana Title 15. Taxation § 15-24-1208. Apportionment of tax-exempt property

(1) If property is owned in any manner by both a tax-exempt person or entity and a person or entity subject to taxation, the ownership interest of the person or entity subject to taxation in the property must be assessed, and that interest is taxable. The department of revenue shall assess the value of the taxable interest in the property by prorating the value of the property between the taxable interest and the nontaxable interest based on the ownership interests shown on the title to the property or any other document that evidences the ownership of the property. If there is no title to the property or other document that evidences the ownership interests or if the title or other document does not show the ownership interest, the value of the property must be prorated among the owners as if each owner owned equal interests in the property.

(2) If property is tax-exempt by virtue of its use, it loses its tax-exempt status when the tax-exempt use ends. If the property is used for both a tax-exempt use and a taxable use, the property is taxed based on the taxable use. The department shall assess the property based on the ratio of the taxable use to the total tax-exempt and taxable use during the preceding calendar year multiplied by the market value of the property.