Why do you lose the Child Tax Credit at age 17?
The IRS limits the Child Tax Credit to children who are under age 17 at the end of the tax year. Once your child turns 17, they no longer qualify for this specific credit because they no longer meet the Child Tax Credit age requirement.
Last updated September 23, 2026
Written by: Clark Stott
Reviewed by: Jeff Patterson
In this article
Quick answer:
- The Child Tax Credit applies only to children under age 17 at the end of the tax year.
- For the 2026 tax year, the Child Tax Credit is worth up to US$2,200 per qualifying child.
- Up to US$1,700 may be available through the refundable Additional Child Tax Credit (ACTC).
- If your child is age 17 on December 31, 2026, you cannot claim the Child Tax Credit for them on your 2026 tax return.
- You may still be able to claim your child as a dependent and qualify for a different tax credit.
Losing the Child Tax Credit doesn’t necessarily mean you can no longer claim your child as a dependent. It simply changes which tax benefits may be available to you.
Key Child Tax Credit facts for the 2026 tax year (filed in 2027)
|
Item |
2026 rule |
|
Maximum Child Tax Credit |
US$2,200 per qualifying child |
|
Maximum refundable ACTC |
Up to US$1,700 per qualifying child |
|
Age requirement |
Under age 17 at the end of 2026 |
|
Income phaseout begins |
US$200,000, or US$400,000 if Married Filing Jointly |
|
Main calculation form |
Schedule 8812 |
Can US citizens living abroad claim the Child Tax Credit?
Yes. Living abroad does not automatically stop US citizens and Green Card holders from claiming the Child Tax Credit if they meet the requirements. Some expats may also qualify for the refundable Additional Child Tax Credit (ACTC).
For 2026, up to US$1,700 per qualifying child may be refundable through the ACTC. You generally need at least US$2,500 of earned income, and the amount available depends on your income and other eligibility rules.
However, if you use the Foreign Earned Income Exclusion (Form 2555), you cannot claim the ACTC. This matters for US expats who might otherwise qualify for the refundable credit.
If you’re choosing between the Foreign Earned Income Exclusion and another option, such as the Foreign Tax Credit, consider how your choice could affect the tax credits available to you.
Why does the Child Tax Credit stop when your child turns 17?
The age limit comes from the rules the IRS uses to determine whether a child qualifies for the Child Tax Credit.
To claim the credit, your child must meet several requirements, including:
- Age test. Your child must be under age 17 at the end of the tax year.
- Relationship test. They must be your son, daughter, stepchild, eligible foster child, sibling, step-sibling, half-sibling, or a descendant of one of these individuals.
- Residency test. They must generally have lived with you for more than half of the tax year.
- Support test. They must not have provided more than half of their own financial support during the year.
- Dependent test. You must claim the child as a dependent on your tax return.
- Joint return test. The child generally cannot file a joint tax return, unless they file it only to claim a refund of withheld or estimated tax.
- Citizenship or residency test. The child must be a US citizen, US national, or US resident alien.
- Social Security number test. The child must have a Social Security Number valid for employment that was issued by the tax return deadline, including extensions.
The age rule is the one that trips people up. Even if your child is still in school, financially dependent on you, and living at home, they must still meet the CTC age test.
You might qualify for up to $1,700 in Child Tax Credit refunds.
Use our free calculator to get an estimate.
What changes when your child turns 17?
When your child turns 17, you may still be able to claim them as a dependent if they meet the IRS dependency rules. However, they no longer meet the age requirement for the Child Tax Credit. This means you also lose access to the Additional Child Tax Credit for that child.
In some cases, the Credit for Other Dependents may be available instead. This credit is worth up to US$500 and is nonrefundable.
Here is a direct comparison of what changes before and after your child turns 17:
|
Before age 17 |
Age 17 or older |
|
May qualify for CTC of up to US$2,200 |
Does not meet the CTC age requirement |
|
Refundable ACTC may be available |
ACTC is not available for that child |
|
Meets the CTC age requirement |
May still qualify as your dependent |
|
Larger child-related credit may be available |
May qualify for the Credit for Other Dependents |
Key takeaway: Turning 17 does not automatically mean your child can no longer be your dependent. It means they no longer meet the age requirement for the Child Tax Credit.
Can you still claim your child after age 17?
Yes. Your child may still qualify as your dependent after turning 17. Generally, they must be under 19 and younger than you, or under 24 and a full-time student. There is no age limit if they are permanently and totally disabled.
In some cases, an older child may also qualify under the separate qualifying relative rules. They must still meet other dependency requirements. However, being your dependent does not mean they still qualify for the Child Tax Credit.
For 2026:
- You can no longer claim the Child Tax Credit of up to US$2,200 once the child is 17 or older.
- You can no longer claim the Additional Child Tax Credit of up to US$1,700 for that child.
- You may instead qualify for the Credit for Other Dependents of up to US$500.
The key difference is that the Child Tax Credit has a stricter age limit than the general rules for claiming a dependent. A child may therefore remain your dependent even after they are too old for the Child Tax Credit.
Are there other credits you can claim for a child age 17 or older?
Yes, but each credit has different eligibility requirements. Once your child no longer qualifies for the Child Tax Credit, the Credit for Other Dependents may be the most relevant alternative if they remain your dependent.
Other tax benefits may also apply in specific circumstances, such as when you’re paying for care, higher education, medical expenses, or adoption-related costs.
Here is a clearer breakdown:
|
Credit or deduction |
Most relevant when |
Amount for 2026 tax year |
|
Credit for Other Dependents |
Child is no longer eligible for the CTC but remains an eligible dependent |
Up to US$500 |
|
For a child age 17 or older, this may apply if they are physically or mentally incapable of self-care and other requirements are met |
Up to 50% of eligible expenses, using up to US$3,000 for one person or US$6,000 for two or more |
|
|
Child is an eligible student in their first four years of higher education |
Up to US$2,500 per eligible student |
|
|
Eligible tuition and related expenses are paid for higher education |
Up to US$2,000 per tax return |
|
|
Child lived with you in the US for more than half the year, and you did not file Form 2555 |
||
|
Medical expense deduction |
You itemize and have qualifying unreimbursed medical expenses |
Qualifying expenses exceeding 7.5% of AGI may be deductible |
|
Adoption Credit |
You paid qualified expenses to adopt a child under 18 or someone unable to care for themselves |
Up to US$17,670, with up to US$5,120 refundable |
Common mistakes that reduce or eliminate your Child Tax Credit
Many Child Tax Credit problems come from misunderstandings about how the eligibility rules work. Here are some of the most common issues.
- Assuming a 17-year-old still qualifies. If your child is age 17 on December 31, they do not meet the CTC age requirement for that tax year.
- Not securing an eligible SSN for a child born abroad. Your qualifying child generally needs a Social Security Number that is valid for employment and issued by the due date of the return, including extensions, to qualify for the CTC or ACTC.
- Using FEIE without considering the ACTC impact. If you claim the Foreign Earned Income Exclusion using Form 2555, you cannot claim the refundable Additional Child Tax Credit.
- Misunderstanding dependency rules between parents. Two taxpayers cannot both claim the same child for the Child Tax Credit in the same tax year. Special IRS rules determine who can claim the child when more than one taxpayer may otherwise qualify.
- Missing or incorrectly completing Schedule 8812. Schedule 8812 is used to calculate the Child Tax Credit, Credit for Other Dependents, and Additional Child Tax Credit. Errors on the form can affect the amount you claim.
Checking these areas carefully can reduce the risk of incorrectly claiming the credit or missing a credit you may be entitled to.
SSN rule update:
- The child must have a Social Security Number valid for employment by the tax return deadline, including extensions.
- The taxpayer claiming the credit must also have a work-valid SSN.
- If filing jointly, only one spouse needs a work-valid SSN; the other can have an SSN or ITIN.
- A child with an ITIN cannot qualify for the CTC or ACTC, but may qualify for the Credit for Other Dependents.
Frequently Asked Questions
Do you lose the Child Tax Credit the same year your child turns 17?
Yes. Eligibility is based on your child’s age at the end of the tax year. For example, if your child turns 17 at any point during 2026, they will be age 17 on December 31, 2026 and will not qualify for the Child Tax Credit on your 2026 tax return.
Can a child qualify for the credit one year and not the next?
Yes. Child Tax Credit eligibility is determined for each tax year. A child who meets the age requirement for 2025 may no longer qualify for the credit in 2026 if they turn 17 during 2026.
Does the Child Tax Credit phase out with age?
No. There is no gradual age-based reduction. Once your child fails the under-17 age requirement, they no longer qualify for the Child Tax Credit. This is separate from the income-based phaseout that applies to higher-income taxpayers.
Can separated parents both claim the Child Tax Credit?
No. Both parents cannot claim the same child for the Child Tax Credit in the same year. Generally, the custodial parent claims the credit, but they may allow the noncustodial parent to claim it by signing Form 8332.
What if my child studies or lives abroad?
Living or studying abroad does not automatically prevent a child from qualifying for the Child Tax Credit. The child generally must live with you for more than half the year, but time away for education can still count if the absence is temporary.
For the EITC, the rule is stricter: the child generally must have lived with you in the United States for more than half the year.
Prefer to talk it through? Schedule your free callback today.
Clark Stott has been with Expat Tax Online since 2015. Being a dual national based in the UK, Clark has unique experience helping US citizens (and Accidental Americans) become tax compliant via the Streamlined Tax Amnesty program. Clark likes to help Americans in the UK keep their tax situations as simple as possible to avoid harsh IRS treatment.
