State of Hawaii and Federal Incentives

This webpage offers examples of the variety of local, state, and federal incentives designed to encourage the growth and proliferation of renewable energy technologies. Contact the appropriate regulatory agency for more information. Check with your tax professional on the specifics of your project regarding this incentive.

State of Hawaii Incentives

1)  Hawaii Renewable Energy Technologies Income Tax Credit
Summary:  The Hawaii Department of Taxation oversees the Hawaii Renewable Energy Technologies Income Tax Credit.

2)  Database of Renewable Energy and Energy Efficiency Incentives Available in Hawaii
Summary:  The North Carolina Clean Energy Technology Center currently provides a free and open resource summarizing the incentives available for clean energy technologies in each state.

3)  Property Tax Incentives
Summary:  Certain counties within the State of Hawaii offer property tax incentives related to renewable energy and energy efficiency property investments.

County of Kauai – Commercial Alternative Energy Exemption

City and County of Honolulu – Real Property Tax Exemption for Alternative Energy Improvements

4)  Hawaii Enterprise Zones
Summary:  Currently, wind energy producers may be eligible for this incentive that provides a 100% general excise tax exemption as well as reductions in state income taxes in exchange for demonstrated job growth. This incentive is available statewide in designated geographic areas.

5)  Hawaii Foreign Trade Zone
Summary:  Hawaii’s Foreign Trade Zone Program supports manufacturing and small business activity in Hawaii by encouraging companies to compete in export markets and providing growth to new companies that import and export merchandise, including renewable energy and energy efficiency equipment.

6)  Renewable Fuels Production Tax Credit

Per HRS 235-110.31, the Renewable Fuels Production Tax Credit will no longer be available after the 2021 tax year. Pre-qualified (i.e. have previously and timely submitted the required forms for 2021) renewable fuel producers seeking to claim the credit for the 2021 tax year must also completely fill out and submit to DBEDT the “RFPTC- Independent Third-Party Certified Statement” Forms by the designated deadline.

RFPTC – Independent Third Party Certified Statement 2021 (Excel)

For the complete details of the RFPTC requirements, Taxpayers should review and follow:

  1. Hawaii Revised Statutes, 235-110.31 as amended to date; and
  2. The Department of Taxation’s Tax Information Release (TIR) No. 2018-03.


Federal Incentives

Visit the Database of State Incentives for Renewables and Efficiency (DSIRE) website for information on the federal tax credits available for renewable energy and energy efficiency systems.

1)  Business Energy Investment Tax Credit (ITC)
Summary:  The federal Business Energy Investment Tax Credit (ITC) has been amended a number of times. The Taxpayer Certainty and Disaster Tax Relief Act of 2020, signed in December 2020, extended this tax credit for certain technologies.  The table below shows the value of the investment tax credit for each technology by year.  The expiration date for solar technologies and wind is based on when construction begins. For all other technologies, the expiration date is based on when the system is placed in service (fully installed and being used for its intended purpose).

Technology 12/31/2020 12/31/2021 12/31/2022 12/31/2023 12/31/2024 12/31/2025 Future Years
PV, Solar Water Heating, Solar Space Heating/Cooling, Solar Process Heat 26% 26% 26% 22% 22% 22% 10%
Hybrid Solar Lighting, Fuel Cells, Small Wind, Waste Energy Recovery 26% 26% 26% 22% N/A N/A N/A
Geothermal Heat Pumps, Microtubines, Combine Heat and Power Systems 10% 10% 10% 10% N/A N/A N/A
Geothermal Electric 10% 10% 10% 10% 10% 10% 10%
Large Wind 18% 18% N/A N/A N/A N/A N/A

2)  Renewable Energy Production Tax Credit (PTC)
Summary:  Wind facilities commencing construction by December 31, 2019 can qualify for this credit. The value of the credit steps down in 2017, 2018 and 2019. See below for more information. For all other technologies, the credit is not available for systems whose construction commenced after December 31, 2016.

3)  Residential Renewable Energy Tax Credit
Summary:  A taxpayer may claim a credit of 30% of qualified expenditures for a system that serves a dwelling unit located in the United States that is owned and used as a residence by the taxpayer.

4)  Corporate Depreciation (Modified Accelerated Cost-Recovery System)
Summary:  The Consolidated Appropriations Act, signed in December 2015, extended the “placed in service” deadline for bonus depreciation. Equipment placed in service before January 1, 2018 can qualify for 50% bonus depreciation. Equipment placed in service during 2018 can qualify for 40% bonus depreciation. And equipment placed in service during 2019 can qualify for 30% bonus depreciation. Under the federal Modified Accelerated Cost-Recovery System (MACRS), businesses may recover investments in certain property through depreciation deductions. The MACRS establishes a set of class lives for various types of property, ranging from three to 50 years, over which the property may be depreciated. A number of renewable energy technologies are classified as five-year property (26 USC § 168(e)(3)(B)(vi)) under the MACRS, which refers to 26 USC § 48(a)(3)(A), often known as the energy investment tax credit or ITC to define eligible property. Such property currently includes:

  • a variety of solar-electric and solar-thermal technologies
  • fuel cells and microturbines
  • geothermal electric
  • direct-use geothermal and geothermal heat pumps
  • small wind (100 kW or less)
  • combined heat and power (CHP)
  • the provision which defines ITC technologies as eligible also adds the general term “wind” as an eligible technology, extending the five-year schedule to large wind facilities as well


Important Notice:
These resources are advisory and for informational purposes only and may not be relied upon to determine the available incentives. Contact the appropriate agencies for information on local, state, and federal incentives for renewable energy. The listings, associations, and contacts herein are provided for informational purposes only and are not meant to be all inclusive. The Hawaii State Energy Office does not endorse or certify the individuals, firms ,or businesses on these lists. If you are a firm that engages in the specialization of commercial scale renewable energy project development, finance, consulting or investment services and wish be to added to the content found in these following summary pages, we welcome you to contact us and provide your information for listing.

For comments or questions about the Developer & Investor Center, please contact the Hawaii State Energy Office.