Excise Tax Exemption for Solar or Wind Powered Systems

February 14, 2024


Massachusetts law exempts any "solar or wind powered climate control unit and any solar or wind powered water heating unit or any other type unit or system powered thereby," that qualifies for the state's excise tax deduction for these systems from the tangible property measure of the state's corporate excise tax. The exemption is in effect for the length of the system's depreciation period. 

Note: For information about what constitutes the corporate excise tax, please visit the official Massachusetts website.

Program Overview

Implementing Sector: State
Category: Financial Incentive
State: Massachusetts
Incentive Type: Corporate Tax Exemption
Web Site: http://www.mass.gov/dor/businesses/current-tax-info/guide-to-corporate-excise-tax/deductions.html#solar
Administrator: Massachusetts Department of Revenue
Start Date:
Eligible Renewable/Other Technologies:
  • Solar Water Heat
  • Solar Space Heat
  • Solar Thermal Process Heat
  • Wind (All)
  • Wind (Small)
Incentive Amount: 100% of the tangible property portion of the excise tax
Maximum Incentive: None


Name: MGL ch. 63, § 38H
Date Enacted: 1976


Name: Massachusetts Department of Revenue
Address: P.O. Box 7010
Boston MA 02204
Phone: (800) 392-6089

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.