ING trusts are non-grantor irrevocable trusts sitused in a no-income tax trust state, thus allowing a taxpayer to avoid state income taxes so long as the ING trust doesn’t have a resident trustee in a client’s high income tax resident state. The trust grantor generally has limited rights over the principal and income of the trust. Additionally, because the ING trust is an incomplete gift trust, it won’t be considered a taxable gift for federal gift tax purposes. As mentioned, ING trusts are generally sitused in no-income tax trust states; consequently, they’re named AKING (Alaska), DING (Delaware), NING (Nevada), SDING (South Dakota) and WING (Wyoming). New York passed legislation in 2014 to treat ING trusts as grantor trusts, thus eliminating the state income tax savings on ING trusts for New York residents. California recently passed retroactive legislation on July 10, 2023 to treat ING trusts as grantor trusts, thereby eliminating the ability of a California resident to save California state income taxes.
See https://www.wealthmanagement.com/estate-planning/tips-pros-importance-state-taxes-estate-planning