Hawaii’s Governor Extends Solar Energy Tax Credit for Commercial and Industrial Projects
Gov. Josh Green extended Hawaii’s solar tax credit for 2026 on Friday, averting potential delays for hundreds of commercial and industrial projects that faced uncertainty after the Legislature capped the incentive at $40 million annually in 2025. The move preserves credits for projects completed or in development before May 21, though the cap remains in effect for future years until 2030, when the credit will expire.
The Renewable Energy Technologies Income Tax Credit allows taxpayers to subtract 35% of solar system costs from income taxes. The Legislature’s retroactive cap, applied to 2026, threatened 256 projects valued at $436 million, with investors reportedly withdrawing support. Green’s executive order cites a 2025 directive to decarbonize Hawaii’s economy, aligning with a 2045 law requiring all electricity to come from renewables.
Why It Matters
The solar tax credit is the largest of nine state incentives, with $1.36 billion awarded since 2006. Hawaii’s legal mandate to transition to solar and wind over two decades distinguishes the industry from others, as large-scale farms and distributed rooftop systems both play roles. The state’s policy emphasizes “dispatchable solar generation on every rooftop and parking area on land-constrained Oahu by 2045,” according to Green’s office.
The $40 million cap, which lawmakers imposed to avoid raising income taxes, drew criticism for its retroactive application. Rocky Mould of the Hawaii Solar Energy Association noted the credit reduces electricity bills for families and businesses while improving grid resilience. However, the 2030 expiration creates uncertainty for long-term planning.
What May Happen Next
Projects not completed by May 21 may face scrutiny to prove financing relied on the credit. Industry leaders could push for legislative adjustments to the cap, though lawmakers have not indicated plans to revisit the measure. The 2030 phaseout may prompt developers to accelerate projects or seek alternative incentives, while the state’s renewable energy goals could drive continued investment in solar despite the cap.
Frequently Asked Questions
What is the solar tax credit’s purpose? It allows taxpayers to reduce income taxes by 35% of solar system costs, supporting commercial and industrial solar adoption.
Why was the cap controversial? The $40 million annual limit, applied retroactively to 2026, threatened 256 projects valued at $436 million, with investors withdrawing support.
When will the credit expire? The credit will be eliminated in 2030, though the $40 million cap remains in effect until then.
How will Hawaii balance its 2045 renewable energy goals with the 2030 credit phaseout?