Qualifying child vs. qualifying relative
The IRS sorts every dependent into one of two categories. Which one applies to your child usually comes down to their age.
| Feature | Qualifying Child | Qualifying Relative |
|---|---|---|
| Age limit | Under 19 or under 24 if a full-time student and must be younger than you (and your spouse if married filing jointly); no limit if permanently and totally disabled | No age limit |
| Residency | Lived with you more than half the year | Must live with you all year or are related to you in one of the ways listed on IRS Pub 501 |
| Income | No income limit | Gross income under $5,300 ($5,200 for 2025) |
| Support | Child didn’t provide more than half of their own support | You provided more than half of their total support |
| Potential tax credit | Credit for Other Dependents ($500) once the child is 17 or older | Credit for Other Dependents ($500) |
Source: Internal Revenue Service
Qualifying child rules for an adult child
Your adult child can still count as a qualifying child if they meet all five IRS tests:
- Relationship test: They’re your son, daughter, stepchild, foster child, sibling, half-sibling, stepsibling, or a descendant of any of those.
- Age test: They’re under 19 at the end of the year, or under 24 if they’re a full-time student for at least five months of the year. There’s no age limit if they’re permanently and totally disabled.
- Residency test: They lived with you for more than half the year.
- Support test: They didn’t provide more than half of their own financial support for the year.
- Joint return test: They can’t file a joint tax return unless it’s solely to claim a refund.
When an adult child counts as a qualifying relative
If your adult child is too old, or no longer a full-time student, they can still be your dependent as a qualifying relative if they clear two more tests:
- Gross income test: Their gross income has to be under $5,300 for 2026.
- Support test: You have to provide more than half of their total support for the year, including housing, food, medical care, and other living costs.
Tax benefits of claiming your adult child
If your adult child qualifies as your dependent, you may be able to claim:
- Credit for Other Dependents (ODC)
- Head of Household filing status
- Earned Income Tax Credit (EITC)
- American Opportunity Tax Credit
- Child and Dependent Care Credit
