Can I Claim the Child Tax Credit for a Disabled Adult Child?

The Child Tax Credit has an age limit of 17 — children must be under 17 as of December 31 to qualify. A permanently and totally disabled adult child of any age can qualify as a "qualifying child" for other purposes (like filing status and the Dependent Care Credit), but not for the Child Tax Credit. However, you may still be able to claim a $500 "Credit for Other Dependents" for a disabled adult child who qualifies as your dependent but is 17 or older. The Credit for Other Dependents is non-refundable and phases out at the same income levels as the Child Tax Credit. You can also potentially claim the Dependent Care Credit for care costs.