HI HB690

Creates a refundable income tax credit for individual taxpayers who install, place into service, or repair a water catchment system on residential property in Hawaii.

Allows a refundable income tax credit for taxpayers who purchase water delivery services of at least 250 gallons during the taxable year to a residential property in Hawaii.

Credit amount equals the lesser of: actual costs incurred, or $500 maximum.

Taxpayers may claim only one credit option and must file claims within 12 months following the close of the taxable year or forfeit the credit.

Applies to taxable years beginning after December 31, 2025.