Deduction For Energy-Conserving Investment

Montana allows you to deduct up to $1,800 from your state income taxes for energy-conserving improvements to your home, such as insulation, windows, doors, programmable thermostats, or weather-stripping. To claim this deduction, you must report the cost of qualifying capital investments on your Montana corporate income tax return (Form CIT) and follow the instructions provided in the annual Form CIT Instructions booklet.

This deduction applies to your customers' Montana corporate tax returns when they invest in energy conservation improvements to residential or non-residential buildings. Residential buildings qualify for up to $1,800 in deductions; non-residential buildings (commercial, industrial, or agricultural) can deduct up to $3,600. Eligible technologies include insulation, windows, doors, HVAC controls, lighting, and caulking/weather-stripping that demonstrably reduce energy waste or consumption; new construction must exceed established building standards to qualify.

Montana's energy conservation deduction is administered through the state corporate income tax system via Form CIT and its annual instructions. The program caps deductions at $1,800 for residential properties and $3,600 for non-residential (commercial, industrial, and agricultural) properties, targeting capital investments in technologies that reduce energy waste or requirements. Taxpayers must substantiate that improvements meet the energy conservation definition and that new construction exceeds applicable standards; administration occurs through standard tax filing and audit procedures under Montana Code Annotated Title 15.