As a general rule, the income is taxable to the minor. However, as discussed in Q 8601, unearned income of children (even potentially up to age 23), may be subject to the kiddie tax.
To the extent that income from the transferred property is used for the minor’s support, it may be taxed to the person who is legally obligated to support the minor.1 State laws differ as to a parent’s obligation to support. The income will be taxable to the parent only to the extent that it is actually used to discharge or satisfy the parent’s obligation under state law.2
1. Rev. Rul. 56-484, 1956-2 CB 23; Rev. Rul. 59-357, 1959-2 CB 212.
2. IRC § 677(b).