Family
Who counts as a dependent
The two sets of tests, the tie-breakers when two people could claim the same child, and the cases that come up most: divorced parents, college students, and an aging parent you support. Almost every family tax break starts with this question.
Almost every family tax break starts with the same question: is this person your dependent? The child tax credit, head of household status, the earned income credit, the dependent care credit and the education credits all hang on the answer. The tax code has two kinds of dependent, a qualifying child and a qualifying relative, and each has its own tests. Every test must be met; miss one and the person is not your dependent for that year.
| Benefit | Value | Who it needs |
|---|---|---|
| Child tax credit | $2,200 per child, up to $1,700 refundable | Qualifying child under 17 with a Social Security number |
| Credit for other dependents | $500 each | Any other dependent: older children, parents, children with an ITIN |
| Head of household status | $24,150 standard deduction and wider brackets than single | An unmarried taxpayer paying more than half the cost of a home for a qualifying person |
| Earned income credit | Up to $8,231 | A qualifying child who lived with you more than half the year |
| Child and dependent care credit | Up to $3,000 | A child under 13, or a spouse or dependent who cannot care for themselves |
| Education credits | Up to $2,500 per student | The student must be you, your spouse or your dependent |
Colorado’s child tax credit and child care credit follow the same federal dependents.
A qualifying child: five tests
Relationship. Your son, daughter, stepchild, adopted child or foster child placed by an agency or court; your brother, sister, half-sibling or step-sibling; or a descendant of any of them, such as a grandchild, niece or nephew.
Age. Under 19 at the end of the year, or under 24 and a full-time student for at least five months of the year, and younger than you (or your spouse). A child who is permanently and totally disabled qualifies at any age.
Residence. Lived with you for more than half the year. Time away at school, in the hospital, in juvenile detention or on military service counts as time at home. A child born or who died during the year counts if your home was their home for the time they were alive.
Support. The child did not pay for more than half of his or her own support. Note the test: it is whether the child provided half, not whether you did. Scholarships do not count as the child’s support.
Joint return. The child is not filing a joint return with a spouse, unless only to claim a refund of withholding.
There is no income limit for a qualifying child. A 20-year-old full-time student with a summer job and $15,000 of wages can still be a dependent, as long as the wages did not pay more than half of the student’s support for the year. And for everyone: a dependent must be a U.S. citizen, national or resident, or a resident of Canada or Mexico, and someone who is a dependent cannot claim dependents of their own.
A qualifying relative: four tests
A person who is not anyone’s qualifying child may still be your dependent. This is how people claim aging parents, adult children with little income, and other relatives they support.
Not a qualifying child of you or anyone else. Relationship or household: either related to you (children, parents, grandparents, siblings, in-laws, aunts, uncles, nieces, nephews, step-relatives), or living with you all year as a member of your household, like a partner. A parent does not have to live with you. Gross income under $5,300 for 2026. Social Security that is not taxable does not count toward this, which is why many retired parents qualify. Support: you paid more than half of the person’s total support for the year: housing, food, medical care, clothing, transportation. Their own Social Security spent on themselves counts as their support, not yours.
A qualifying relative is worth the $500 credit for other dependents, and sometimes head of household status, but not the child tax credit or the earned income credit.
Worked example: claiming a parent in assisted living
A daughter pays part of her 82-year-old mother’s assisted-living bill. Mother receives $21,000 of Social Security (none of it taxable) and $3,800 of interest.
| Amount | Test | |
|---|---|---|
| Mother’s gross income for the test (interest only) | $3,800 | Under $5,300: passes |
| Mother’s total support for the year (facility, medical, clothing, extras) | $58,000 | |
| Paid from mother’s own Social Security and savings | $24,000 | 41% |
| Paid by the daughter | $34,000 | 59%: more than half, passes |
| Result | Mother is the daughter’s dependent: $500 credit, head of household if the daughter is unmarried, and the $34,000 of medical costs the daughter paid count toward her own medical deduction | |
Had mother paid $30,000 of the $58,000 herself, the daughter would fail the support test. If two siblings split the $34,000, neither pays more than half, but together they do: either one can claim mother with Form 2120 signed by the other, and they can alternate years.
When two people could claim the same child
A child can be the qualifying child of more than one person: two parents living apart, or a parent and a grandparent in the same house. Only one can claim the child for the child-related benefits. If they cannot agree, the IRS uses these tie-breakers, in order:
- A parent beats a non-parent. If a parent can claim the child, a grandparent or aunt can claim the child only if the parent does not, and only if their AGI is higher than any parent’s (verify).
- More nights wins. Between two parents who do not file together, the one the child lived with for more nights during the year.
- Then higher AGI. If the nights are exactly equal, the parent with the higher adjusted gross income.
- Non-parents: highest AGI. If no parent can claim the child, the eligible person with the highest AGI.
Divorced and separated parents, and Form 8332
For tax purposes, the custodial parent is the one the child spent more nights with during the year, whatever the custody order says. A decree binds the parents, not the IRS. That parent claims the child. But the custodial parent can release part of the claim to the other parent by signing Form 8332, for one year, several years or all future years, and the noncustodial parent attaches it to their return.
What Form 8332 transfers: the child as a dependent for the child tax credit and the credit for other dependents. What it does not transfer: head of household status, the earned income credit, and the child care credit stay with the custodial parent no matter what. Splitting them this way is often the best result for the family overall. For decrees after 2008, the IRS will not accept pages of the decree in place of Form 8332, even if the decree says who claims the child. The custodial parent can revoke a release using Part III of the form, effective the following year, after giving the other parent a copy.
If both parents claim the child, the second e-filed return is rejected. The second parent can file on paper, and the IRS will apply the tie-breakers and send letters to both. The parent who does not qualify owes back the credits, plus interest. It is faster and cheaper to agree first.
Common situations
The college student. Under 24 and full-time, and time at school counts as living at home, so most college students remain qualifying children. The student should not claim themselves, and only one return gets the education credit for that student.
The adult child at home. Over 24 and not disabled, a child can only be a qualifying relative: income under $5,300 for 2026 and you pay more than half their support. The $500 credit and head of household status can still apply.
A partner who lives with you. An unrelated partner who lived with you all year and meets the income and support tests can be a qualifying relative, but does not make you head of household.
A baby born December 31. Counts as having lived with you all year. Get the Social Security number before filing to claim the full child tax credit; file an extension rather than file without it.
Behind the scenes
Before a child goes on a return, a preparer counts nights, not months. A child who moved between households in the spring may have slept more nights at the other parent’s house, and the school calendar, a custody order and the parents’ own memory often disagree. The night count decides every credit on the return, so it gets written down and kept with the file in case the IRS asks for it later, which with a disputed child it often does. For the earned income credit and head of household, the IRS requires the preparer to document the answers; a preparer who skips the questions is personally penalized.
The Colorado side
Colorado uses the federal dependents. Its child tax credit (for children under 6, lower incomes) and its child care credit follow the federal return, with one difference: the Colorado child tax credit does not require the child to have a Social Security number, and ITIN filers can claim it and the Colorado earned income credit. A parent you support who is your federal dependent is your Colorado dependent too, though Colorado has no exemption or credit for one; the benefit is the head of household standard deduction flowing through.
What to bring your preparer
- Each dependent’s full name, Social Security number or ITIN, date of birth and relationship to you
- For a child of separated parents: a count of the nights with you, the custody order, and a signed Form 8332 if the other parent is claiming the child
- For a student: enrollment status and months enrolled, and roughly how much of their own support they paid
- For a parent or other relative: their gross income excluding nontaxable Social Security, and what you paid toward their support
- If siblings share a parent’s support: who paid what, and a signed Form 2120 from each sibling not claiming
- For a newborn: the Social Security card, or a note that it has been applied for
Questions people ask
My son is 20 and in college full-time. Can I still claim him?
Usually, yes. A full-time student under 24 can be your qualifying child, and time at school counts as time living with you, as long as he did not pay for more than half of his own support.
My daughter earned $12,000 last year. Does that stop me from claiming her?
Not if she is your qualifying child, because there is no income limit for a qualifying child. She can file her own return to get her withholding back, checking the box that someone can claim her.
We have 50/50 custody. Who claims our child?
The parent with more nights in the year; 50/50 is rarely exactly equal once counted. If it is, the parent with the higher AGI. You can still agree to alternate years using Form 8332, but head of household and the earned income credit stay with the parent who has the child more nights.
Can I claim my mother, who lives in her own apartment?
Yes, if her gross income, not counting nontaxable Social Security, is under $5,300 for 2026 and you pay more than half her total support.
My ex and I both claimed our son. What happens now?
The IRS applies the tie-breaker rules and sends letters asking each of you to prove the claim. The parent who does not qualify owes back the credits, plus interest. Get advice before responding; the night count is the whole case.
Count nights, not months
The night count decides every child-related credit on the return. Write it down for the year and keep it with your tax papers; with a disputed child, the IRS will ask for it.
Forms and official pages named in this article
- Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
- Form 2120, Multiple Support Declaration (siblings sharing a parent’s support)
- IRS Publication 501, Dependents, Standard Deduction, and Filing Information
- IRS: Whom may I claim as a dependent? (interactive tool)