A dependent has to be your qualifying child or your qualifying relative. A child usually qualifies if they're related to you, were under 19 at the end of the year (or under 24 and a full-time student), lived with you more than half the year, and didn't pay for more than half of their own support. Only one return can claim each person.
On this page
The qualifying child tests
| Test | What it means |
|---|---|
| Relationship | Your son, daughter, stepchild, eligible foster child, brother, sister, half-sibling, stepsibling, adopted child, or a child of any of them, such as a grandchild, niece or nephew |
| Age | Under 19 at the end of the year, under 24 if a full-time student, or any age if permanently and totally disabled |
| Residency | Lived with you for more than half the year, with some exceptions, like time away at school |
| Support | The child didn't provide more than half of their own support |
| Joint return | The child didn't file a joint return, unless only to claim a refund of tax withheld |
The qualifying relative tests
Someone who isn't anyone's qualifying child, such as a parent, an older child or another relative, can still be your dependent if all of these are true:
- They're a relative of a type the rules list, or they lived with you all year as a member of your household
- Their gross income was under the yearly limit, which changes every year
- You provided more than half of their total support for the year
For everyone: a dependent must be a U.S. citizen, U.S. national or resident alien, or a resident of Canada or Mexico. If someone else can claim you, you can't claim dependents of your own, and you can't claim your spouse when you file jointly.
When two people could claim the same child
Only one return can claim a child. When more than one person qualifies, the tie-breaker rules decide:
- A parent wins over a non-parent, such as a grandparent or an aunt.
- Between two parents who don't file together, the parent the child lived with longer during the year.
- If the child lived with each parent equally, the parent with the higher adjusted gross income.
- If no parent can claim the child, the person with the highest adjusted gross income.
Divorced or separated parents
The custodial parent, usually the one the child lived with for more nights, can release the claim to the other parent by signing Form 8332 or a similar written statement. The other parent attaches it to their return. That lets them claim the child for the Child Tax Credit, the Credit for Other Dependents or the Additional Child Tax Credit. Some benefits, such as head of household status and the Earned Income Tax Credit, stay with the parent the child lived with.
Why it matters
Claiming a dependent can open credits like the Child Tax Credit, the Earned Income Tax Credit and the Credit for Other Dependents, and can change your filing status. Credit amounts change by year, so a tax pro checks which ones fit your return.
When a call helps
- Your child turned 19, started college or moved out this year
- You share custody, or a grandparent or ex-spouse may claim the same child
- You support a parent or another relative and aren't sure they count
- Your e-file was rejected because the dependent was already claimed
Quick answers
Can two people claim the same child?
No. A person can only be claimed on one return. If two people claim the same child, tie-breaker rules decide who gets to.
My child turned 19 this year. Can I still claim them?
As a qualifying child, only if they're under 24 and a full-time student, or permanently and totally disabled. Otherwise they may still count as a qualifying relative if they meet those tests.
We're divorced. Who claims our child?
Usually the parent the child lived with for more of the year. That parent can sign Form 8332 to let the other parent claim the child for the Child Tax Credit and related credits.
Someone already claimed my child and my e-file was rejected. What now?
If the Social Security number is right, you can't e-file with that dependent. You can file on paper, and both filers will be contacted to sort out who qualifies.
Have a different question?
Call and ask a tax pro. Open 8 AM to 10 PM Eastern, January through April.
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More questions
Sources
Checked November 12, 2026.