When Does Child Support End in Hawaii?

Last reviewed: March 2026

Child support age limit in Hawaii

In Hawaii, the age of majority for child support purposes is 18. Child support obligations generally continue until the child reaches this age. This is the standard in most U.S. states.

Child support may continue beyond age 18 in certain circumstances, such as when the child has a physical or mental disability that prevents self-support.

How Hawaii calculates child support

Hawaii uses the Melson Formula model for calculating child support. The Melson Formula is a needs-based model that first ensures each parent can meet their own basic living needs, then allocates a share of remaining income to child support. This model accounts for the self-support needs of both parents.

Uses a needs-based formula that first ensures each parent can meet their own basic needs.

Can child support be modified in Hawaii?

Yes. In Hawaii, child support orders can generally be modified when there is a significant change in circumstances. Common reasons include:

• A substantial change in either parent's income (job loss, raise, new employment)
• A change in the custody or visitation arrangement
• A change in the child's needs (medical costs, educational expenses)
• A change in the cost of health insurance or childcare

Is child support taxable in Hawaii?

No. Child support payments are not taxable income for the receiving parent and not tax-deductible for the paying parent. This applies under both federal tax law and Hawaii state law.