The Child Tax Credit: Who Qualifies and How Much

The Child Tax Credit lowers your federal tax bill for each qualifying child you support. For the 2025 tax year it is worth up to $2,200 per child, and a large part of it can come back to you as a refund even if you owe little or no tax. The rules cover the child's age, relationship to you, where they live, and their Social Security number, plus an income limit that reduces the credit for higher earners. This guide explains who qualifies, how the dollar amounts work, and where people lose money by missing a detail.

How much the Child Tax Credit is worth in 2025

The maximum credit is $2,200 per qualifying child for 2025. The credit first reduces the tax you owe, dollar for dollar. If the credit is larger than your tax bill, up to $1,700 per child can be paid to you as a refund through the Additional Child Tax Credit. That refundable piece is what makes the credit valuable to families with lower tax liability. The remaining portion above $1,700 is nonrefundable, meaning it can take your tax down to zero but no further.

For the official figures and any annual updates, see the IRS page on the Child Tax Credit.

Who counts as a qualifying child

A child must meet every one of these tests for you to claim the credit:

• Age: The child must be under age 17 at the end of the year. A child who turns 17 during 2025 does not qualify for the Child Tax Credit.
• Relationship: The child must be your son, daughter, stepchild, foster child, brother, sister, stepsibling, half-sibling, or a descendant of any of these (for example, a grandchild, niece, or nephew).
• Residency: The child must have lived with you for more than half the year.
• Dependency: You must claim the child as a dependent on your return.
• Social Security number: The child must have a valid Social Security number issued before the due date of your return.

If a child fails even one of these tests, you cannot claim the Child Tax Credit for that child, though another credit may apply.

The income phaseout and how it reduces your credit

The credit starts to shrink once your modified adjusted gross income passes the threshold for your filing status:

• $200,000 for single, head of household, and most other filers.
• $400,000 for married filing jointly.

Above the threshold, the credit drops by $50 for every $1,000 of income over the limit (or any part of $1,000). Because the reduction is tied to total income rather than counted per child, families with several children keep more of the credit before it fully disappears.

A worked example with numbers

Consider a married couple filing jointly with two qualifying children, both under 17 with valid Social Security numbers. Their starting credit is 2 x $2,200 = $4,400.

Below the threshold: If their modified adjusted gross income is $150,000, they are under the $400,000 limit, so no phaseout applies. They can claim the full $4,400, subject to how much tax they owe and the refundable limit of $1,700 per child.

Above the threshold (phaseout example): Suppose the same couple earns $430,000. That is $30,000 over the $400,000 threshold. Dividing $30,000 by $1,000 gives 30, and 30 x $50 = $1,500. Their credit is reduced by $1,500, leaving $4,400 - $1,500 = $2,900. They claim $2,900 instead of the full $4,400.

If their income were $510,000, the reduction would be 110 x $50 = $5,500, which is more than their $4,400 credit, so the credit would be reduced to zero.

The Credit for Other Dependents

Dependents who do not meet the qualifying-child rules may still earn you a smaller credit. The Credit for Other Dependents is worth up to $500 per dependent and is nonrefundable, so it reduces tax owed but is not paid out as a refund. It can apply to a child age 17 or older, a college-age dependent, or a dependent parent or other relative you support. The same income phaseout thresholds and $50-per-$1,000 reduction apply. Details are on the IRS Credit for Other Dependents page, and the dependency rules are explained in Publication 501.

Common mistakes to avoid

• Claiming a 17-year-old for the full credit. A child who has turned 17 by year end no longer qualifies for the Child Tax Credit, though the $500 Credit for Other Dependents may apply.
• Missing the Social Security number deadline. The child needs a valid Social Security number issued before your return's due date. An ITIN does not satisfy this requirement for the Child Tax Credit.
• Overlooking the refundable portion. Families with little tax liability sometimes assume the credit does nothing for them, but up to $1,700 per child can come back as a refund.
• Misjudging residency in shared-custody situations. The child must live with you more than half the year, and only one taxpayer can claim a given child. Coordinate to avoid duplicate claims that trigger IRS notices.
• Forgetting the phaseout math. The reduction rounds up to the next $1,000, so even $200 over the threshold costs you $50 of credit.

Does the Child Tax Credit reduce my refund or increase it?

It can do both. The credit first lowers the tax you owe. If part of the credit remains after your tax reaches zero, up to $1,700 per child is added to your refund through the Additional Child Tax Credit.

Can I claim the credit if my child has an ITIN instead of a Social Security number?

No. The Child Tax Credit requires the child to have a valid Social Security number issued before the due date of your return. A child with an ITIN may instead qualify you for the $500 Credit for Other Dependents.

What happens the year my child turns 17?

The age test looks at whether the child is under 17 at the end of the year. If the child turns 17 during the year, they do not qualify for the Child Tax Credit for that year, but you may claim the Credit for Other Dependents if the other dependency rules are met.

Can both parents claim the same child?

No. Only one taxpayer can claim a given child for the Child Tax Credit. In shared-custody situations the parents must decide who claims the child, generally the parent the child lived with for more than half the year. See Publication 501 for the tie-breaker rules.

How do I know if my income is too high to qualify?

Compare your modified adjusted gross income to the threshold for your filing status: $200,000 for most filers and $400,000 for married filing jointly. Below the threshold you get the full credit. Above it, subtract $50 for every $1,000 (or part of $1,000) over the limit to estimate your reduced credit.

Disclaimer: This article is for informational purposes only and is not meant to be financial or legal advice.