The Harold K.L. Castle Foundation does not make grants to:
- Individuals or businesses
- Ongoing operating expenses (except for those few organizations the Foundation deems critical to the success of its overall strategies. The Foundation may also support a new project or organization needing start-up funding)
- Vehicles
- Computers
- Endowments
- Annual fund drives
- Sponsorships, special events, dinners, galas
- Organizations based outside of Hawaii
- Projects taking place outside Hawaii that do not benefit Hawaii