Who Qualifies for the Child Tax Credit: Tests, Income, and SSN Rules

To qualify for the Child Tax Credit, you need a child under 17 who is related to you, lives with you for more than half the year, doesn’t provide more than half of their own support, and is a U.S. citizen, U.S. national, or U.S. resident alien with a valid Social Security Number. You also need your own SSN and an adjusted gross income at or below $200,000 (or $400,000 if you file jointly) to receive the full $2,200 per child.¹

The Five Tests Your Child Must Pass

Eligibility turns on five separate tests. A child who fails any one of them is not a qualifying child for the Child Tax Credit, though they may still qualify you for the $500 Credit for Other Dependents.

Relationship. The child must be your son, daughter, stepchild, foster child (placed by an authorized agency or court), sibling, half-sibling, stepsibling, or a descendant of any of those, such as a grandchild, niece, or nephew.²
Age. The child must be under 17 at the end of the tax year. There is no exception for children with disabilities; a child who turns 17 during the year does not qualify.¹
Residency. The child must live with you for more than half of the tax year. Temporary absences for school, medical treatment, or military service count as time at home.
Support. The child cannot provide more than half of their own financial support during the year, counting housing, food, clothing, education, and medical care.
Citizenship. The child must be a U.S. citizen, U.S. national, or U.S. resident alien. Keep documentation such as a birth certificate or naturalization papers in case the IRS asks.³

Social Security Number Requirements

The child needs a work-authorized Social Security Number issued by the Social Security Administration before the due date of your tax return, including extensions.⁴ A child with only an Individual Taxpayer Identification Number (ITIN) cannot be claimed for the Child Tax Credit or the refundable Additional Child Tax Credit.³

You need an SSN too. On a joint return, at least one spouse must have one.² If you file with only an ITIN and your spouse (if any) also lacks an SSN, you cannot claim the credit. A child who has an ITIN rather than an SSN can still be claimed for the $500 Credit for Other Dependents if the other requirements are met.

Income Limits and When the Credit Phases Out

You receive the full $2,200 credit per child if your adjusted gross income is at or below $200,000, or $400,000 on a joint return.¹ Above those thresholds, the credit drops by $50 for every $1,000 (or fraction of it) of income over the limit.²

A married couple with one child and $420,000 in adjusted gross income sits $20,000 above the joint threshold, cutting their credit by $1,000, from $2,200 to $1,200. Because each child adds $2,200 to the starting credit, larger families phase out over a wider income range.

When More Than One Person Could Claim the Same Child

A child can only be a qualifying child for one taxpayer in a given year. If two people could each claim the same child, the IRS applies tie-breaker rules:⁵

If only one of the people is the child’s parent, the parent claims the child.
If the parents file jointly, the child is treated as the qualifying child on their joint return.
If two parents file separately, the child goes to the parent the child lived with longer during the year. If the time was equal, the parent with the higher adjusted gross income wins.
If no parent is claiming the child, the person with the highest adjusted gross income claims the child, but only if that income is higher than any parent’s who could have claimed the child.

These rules apply automatically. If two people list the same child, the IRS will flag both returns for review.

Divorced or Separated Parents

The custodial parent, meaning the parent the child lived with for the greater part of the year, is normally the one who claims the credit. The custodial parent can release that claim to the noncustodial parent by signing IRS Form 8332.⁶ The release can cover one year, specific future years, or all future years, and the noncustodial parent must attach it (or a similar written statement) to every return that claims the child.

For the release to be valid, the child must have received more than half of their total support from one or both parents during the year, and the child must have been in the custody of one or both parents for more than half the year.

If Your Child Doesn’t Qualify: the $500 Credit

Dependents who fail the qualifying-child rules, including children 17 or older and dependent parents, may still bring you the Credit for Other Dependents, worth up to $500 per dependent.¹ This credit is nonrefundable: it can zero out your tax, but it won’t produce a refund on its own.

The dependent must meet the IRS definition of a qualifying relative. They either live with you all year or fall into a specific family relationship category, you provide more than half of their financial support, and they are a U.S. citizen, U.S. national, U.S. resident alien, or a resident of Canada or Mexico.⁷ The same $200,000 and $400,000 phase-out thresholds apply.

Who Qualifies for the Refundable Portion

If the Child Tax Credit is worth more than the tax you owe, the Additional Child Tax Credit (ACTC) can refund up to $1,700 per qualifying child as cash.¹ To qualify, you need at least $2,500 in earned income (wages, salary, or self-employment).²

The refundable amount is 15 percent of your earned income above $2,500, capped at $1,700 per child. A parent who earned $12,500, for example, would receive 15 percent of $10,000, or $1,500. Federal law also requires the IRS to hold any refund on a return claiming the ACTC until at least February 15, under the PATH Act.⁸

What Happens If You Claim the Credit Incorrectly

Claiming the Child Tax Credit for a child who doesn’t qualify can cost more than just paying it back. If the IRS finds you claimed it through reckless or intentional disregard of the rules, you can be banned from claiming the CTC, ACTC, and related credits for two years. A fraudulent claim carries a ten-year ban.⁹

After a disallowance, you have to file Form 8862 with any future return that claims the credit again, re-establishing that you meet the eligibility rules.¹⁰ You don’t have to keep filing it every year once the IRS accepts your credit, unless the credit is disallowed again for a reason other than a math error.

Roughly 15 states offer their own child tax credits with their own age limits, income thresholds, and refundability rules. Check your state tax agency’s website to see whether your household qualifies for an additional state-level credit on top of the federal one.

1
Internal Revenue Service. Child Tax Credit
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Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit
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Internal Revenue Service. Child Tax Credit FAQ
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Internal Revenue Service. Instructions for Schedule 8812 (Form 1040)
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Internal Revenue Service. Qualifying Child Rules
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Internal Revenue Service. Form 8332 – Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
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Internal Revenue Service. Dependents
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Internal Revenue Service. Filing Season Statistics for Week Ending Feb. 6, 2026
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Taxpayer Advocate Service. Erroneously Claiming Certain Refundable Tax Credits Could Lead to Being Banned from Claiming the Credits
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Internal Revenue Service. Instructions for Form 8862 – Information To Claim Certain Credits After Disallowance