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The Child Tax Credit (CTC) is a federal tax credit that provides financial relief to families with qualifying children under the age of 17. Originally enacted as part of the Taxpayer Relief Act of 1997 at a modest $400 per child, the CTC has been expanded repeatedly through subsequent legislation. The Tax Cuts and Jobs Act of 2017 doubled the credit from $1,000 to $2,000 per qualifying child and significantly raised the income phase-out thresholds, while the American Rescue Plan Act of 2021 temporarily increased it to $3,000-$3,600 per child with advance monthly payments. For tax year 2024, the credit stands at $2,000 per qualifying child. The CTC has two components: a nonrefundable portion that reduces tax liability dollar-for-dollar (up to the amount of tax owed), and the refundable Additional Child Tax Credit (ACTC) that provides a cash refund to families whose CTC exceeds their tax liability. For 2024, the maximum refundable ACTC is $1,700 per qualifying child, calculated as 15% of earned income exceeding $2,500 (subject to the per-child cap). This refundable component is critical for lower-income families who may owe little or no federal income tax but still benefit from the cash refund. A qualifying child for CTC purposes must meet several tests: the child must be under age 17 at the end of the tax year, must be the taxpayer's son, daughter, stepchild, foster child, brother, sister, or descendant of any of these, must have lived with the taxpayer for more than half the year, must not have provided more than half of their own support, must be claimed as a dependent on the taxpayer's return, must be a U.S. citizen, national, or resident alien, and must have a valid Social Security number issued before the due date of the return. Dependents who do not meet the qualifying child test (such as older children aged 17-18 or elderly dependents) may qualify for the $500 Other Dependent Credit instead. The CTC begins to phase out at $200,000 of modified adjusted gross income for single filers and $400,000 for married filing jointly, decreasing by $50 for each $1,000 of income above the threshold. These thresholds, set by the Tax Cuts and Jobs Act, are notably high compared to pre-2018 levels ($75,000 single / $110,000 MFJ), which means the vast majority of American families with children receive the full credit. The credit is scheduled to revert to $1,000 per child after 2025 unless Congress acts to extend or modify the current provisions.
Child Tax Credit = $2,000 x Number of Qualifying Children (under 17) Phase-Out: Reduction = $50 for each $1,000 (or fraction) by which MAGI exceeds threshold Single/HoH threshold: $200,000 | MFJ threshold: $400,000 Additional Child Tax Credit (Refundable ACTC): ACTC = MIN($1,700 per child, 15% x (Earned Income - $2,500)) ACTC only applies when CTC exceeds tax liability Other Dependent Credit: $500 per qualifying dependent who is not a qualifying child for CTC Worked Example — Married Couple, 3 Children, $85,000 Income: Total CTC = $2,000 x 3 = $6,000 MAGI = $85,000 < $400,000 threshold — No phase-out Federal tax liability (estimated after other credits): $4,200 Nonrefundable CTC used: $4,200 (reduces tax to $0) Remaining CTC: $6,000 - $4,200 = $1,800 ACTC = MIN($1,700 x 3, 15% x ($85,000 - $2,500)) = MIN($5,100, $12,375) = $1,800 Refund from ACTC: $1,800
- 1Count your qualifying children. Each child must be under age 17 at the end of the tax year (December 31), must have a valid Social Security number, must be your biological child, adopted child, stepchild, foster child, sibling, or a descendant of any of these, must have lived with you for more than half the year in the United States, must not have provided more than half of their own financial support, and must be claimed as a dependent on your return.
- 2Calculate the initial credit amount by multiplying $2,000 by the number of qualifying children. Additionally, count any other dependents who do not qualify for the CTC (such as children aged 17-18, college students you claim as dependents, or elderly parents) and multiply by $500 for the Other Dependent Credit. The total credit before phase-out is the sum of both amounts.
- 3Determine whether the phase-out applies by comparing your modified adjusted gross income (MAGI) to the applicable threshold: $200,000 for Single, Head of Household, and Married Filing Separately filers, or $400,000 for Married Filing Jointly filers. For each $1,000 (or fraction thereof) that your MAGI exceeds the threshold, the total credit is reduced by $50. For example, a single filer with MAGI of $210,000 exceeds the threshold by $10,000, resulting in a $500 reduction.
- 4Apply the nonrefundable CTC against your federal income tax liability. The CTC first reduces your tax dollar-for-dollar down to zero. If the full CTC is used against tax liability, no further calculation is needed. If your tax liability is less than your total CTC, the excess credit may be refundable through the Additional Child Tax Credit (ACTC).
- 5Calculate the refundable ACTC if your CTC exceeds your tax liability. The ACTC equals 15% of your earned income exceeding $2,500, but cannot exceed $1,700 per qualifying child. For example, if you have two qualifying children and $30,000 in earned income, the ACTC calculation is 15% x ($30,000 - $2,500) = $4,125, but it is capped at $1,700 x 2 = $3,400. The actual ACTC is the lesser of the excess CTC (credit minus tax liability) and this calculated amount.
- 6Report the CTC on your federal tax return. The nonrefundable CTC is entered on Form 1040, and the refundable ACTC is calculated on Schedule 8812 (Credits for Qualifying Children and Other Dependents). If you have qualifying children, you must include each child's name, SSN, and date of birth. The IRS matches SSNs against its database to verify qualifying child claims.
- 7Be aware of the PATH Act refund hold. Like the EITC, refunds for returns claiming the ACTC are held by the IRS until mid-February regardless of when the return is filed. This delay affects the entire refund, not just the ACTC portion. Plan your finances accordingly if you depend on receiving your tax refund early in the filing season.
This couple's income of $120,000 is well below the $400,000 MFJ threshold, so no phase-out applies. Their two qualifying children generate $4,000 in CTC, which reduces their tax liability from $8,500 to $4,500. Because the full CTC is absorbed by tax liability, there is no ACTC refund. The credit saves this family $4,000 in taxes.
This single parent owes no federal income tax after the standard deduction and other credits, so the entire $6,000 CTC is excess. The ACTC calculation is 15% x ($25,000 - $2,500) = $3,375. The per-child ACTC cap is $1,700 x 3 = $5,100, so the $3,375 amount applies. This parent receives a $3,375 cash refund from the ACTC, providing critical income support despite owing no tax.
This high-income couple exceeds the $400,000 MFJ threshold by $25,000. The phase-out reduces the total credit by $50 x 25 = $1,250. The initial credit of $4,500 (two qualifying children at $2,000 each plus one other dependent at $500) is reduced to $3,250. Their tax liability of $65,000 easily absorbs the credit with no ACTC needed. At income above $480,000, the credit would phase out entirely.
The 5-year-old qualifies for the full $2,000 CTC, but the 17-year-old does not qualify because the CTC requires the child to be under 17 at the end of the tax year. However, the 17-year-old qualifies for the $500 Other Dependent Credit if claimed as a dependent. The total credit of $2,500 reduces this parent's tax from $7,200 to $4,700. This age cutoff surprises many families with older teenagers.
Tax planning professionals use CTC calculations as part of comprehensive year-end tax projections for families, particularly those near the phase-out thresholds or with children approaching the age 17 cutoff. The interaction between CTC, EITC, and other credits creates complex optimization opportunities that professional software models to minimize total tax liability.
School districts and community organizations use CTC awareness campaigns to encourage low-income families to file tax returns. Many eligible families, particularly those with very low incomes, do not file returns because they owe no tax, missing out on thousands of dollars in refundable ACTC. Free filing events at schools and libraries help families claim these credits.
Financial planners help high-income clients (especially those near the $200,000/$400,000 thresholds) with strategies to manage MAGI through retirement contributions, HSA funding, and other above-the-line deductions that can preserve CTC eligibility. For a family with four children, keeping MAGI below the threshold is worth $8,000 in credits.
Policy researchers use CTC participation data to study the effects of cash transfers on child poverty, educational outcomes, food security, and housing stability. The temporary 2021 expansion provided a natural experiment that generated extensive research on the relationship between direct cash support and child welfare indicators.
Families with three or more qualifying children may benefit from an alternative ACTC calculation.
If the family's share of Social Security and Medicare taxes (employee portion plus self-employment tax, minus any EITC) exceeds $2,500, this amount can be used instead of the standard 15% of earned income calculation if it produces a larger ACTC. This alternative calculation primarily benefits large families with moderate earned income whose payroll taxes are substantial but whose 15% calculation would otherwise produce a smaller refund.
Children who are U.S.
citizens living abroad with their parents may still qualify for the CTC if they meet all other requirements, but the residency test for the ACTC (refundable portion) requires the child to live in the United States. This means that U.S. citizens living overseas can claim the nonrefundable CTC against their tax liability but cannot receive the refundable ACTC as a cash payment. Military families stationed overseas are treated as living in the United States for this purpose.
Adopted children from foreign countries may face timing issues with the CTC
Adopted children from foreign countries may face timing issues with the CTC because they need a valid SSN or Adoption Taxpayer Identification Number (ATIN). An ATIN can be used to claim the child as a dependent, but the $2,000 CTC specifically requires an SSN. Families in the process of adopting may claim the $500 Other Dependent Credit using an ATIN while awaiting the child's SSN, and then amend their return to claim the full CTC once the SSN is issued.
| Parameter | 2024 (Current Law) | 2026 (Scheduled Reversion) |
|---|---|---|
| Credit per Child | $2,000 | $1,000 |
| Maximum Age | Under 17 | Under 17 |
| Refundable (ACTC) Cap | $1,700 per child | $1,000 per child |
| Phase-Out (Single) | $200,000 | $75,000 |
| Phase-Out (MFJ) | $400,000 | $110,000 |
| Phase-Out Rate | $50 per $1,000 | $50 per $1,000 |
| Other Dependent Credit | $500 | Not available |
| SSN Required for Child | Yes | Yes |
What happens to the Child Tax Credit after 2025?
The current $2,000 per child CTC with the $400,000 MFJ phase-out threshold was established by the Tax Cuts and Jobs Act of 2017 and is scheduled to expire after December 31, 2025. Unless Congress passes new legislation, the CTC will revert to $1,000 per child with lower phase-out thresholds of $75,000 (single) and $110,000 (MFJ) starting in 2026. The refundable ACTC would also decrease. Multiple legislative proposals have been introduced to make the $2,000 credit permanent, increase it further, or restructure it, but the outcome depends on future Congressional action.
Can I claim the CTC for a newborn baby?
Yes, a baby born at any point during the tax year qualifies for the full $2,000 CTC for that year, even if born on December 31. The child must have a Social Security number issued before the due date of your return (including extensions). You should apply for the baby's SSN as soon as possible after birth, typically at the hospital. If the SSN is not obtained by the filing deadline, you can file an extension or file without the credit and amend your return once the SSN is received.
My child turns 17 this year. Do I still get the CTC?
No, the qualifying child must be under age 17 at the end of the tax year (December 31). If your child turns 17 at any point during the year, even on December 31, they do not qualify for the $2,000 CTC for that tax year. However, the child may still qualify for the $500 Other Dependent Credit if you claim them as a dependent. This age cutoff is one of the most common sources of confusion among CTC claimants.
What is the difference between the CTC and the ACTC?
The Child Tax Credit (CTC) is nonrefundable, meaning it can reduce your tax liability to zero but cannot generate a refund by itself. The Additional Child Tax Credit (ACTC) is the refundable portion that provides a cash refund when the CTC exceeds your tax liability. The ACTC is calculated as 15% of earned income above $2,500, capped at $1,700 per qualifying child for 2024. The ACTC ensures that lower-income families who owe little or no tax still benefit from the credit, though they receive less than the full $2,000 per child unless their earned income is high enough.
Can divorced or separated parents both claim the CTC?
No, only one parent can claim the CTC for each child in a given tax year. Generally, the custodial parent (the parent with whom the child lived for the greater number of nights during the year) claims the child as a dependent and receives the CTC. However, the custodial parent can release the dependency exemption to the noncustodial parent by signing Form 8332, which allows the noncustodial parent to claim the CTC. This transfer of the dependency claim is common in divorce agreements. Note that even with Form 8332, only the custodial parent can claim the EITC and Head of Household status for the child.
Does the CTC affect my eligibility for other benefits?
The CTC and ACTC refund do not count as income for purposes of determining eligibility for means-tested federal benefit programs such as SNAP, Medicaid, TANF, SSI, or public housing for at least 12 months after receipt. This protection ensures that receiving the tax credit does not reduce other benefits that the family depends on. However, if the refund is saved and remains in a bank account, it could potentially count as an asset (resource) for programs with asset limits after the 12-month protection period expires.
Are ITIN holders eligible for the CTC?
The taxpayer filing the return can use an ITIN (Individual Taxpayer Identification Number), but the qualifying child must have a valid Social Security number (SSN) issued before the tax return due date. If the child has an ITIN rather than an SSN, the child does not qualify for the $2,000 CTC but may qualify for the $500 Other Dependent Credit. This SSN requirement was added by the Tax Cuts and Jobs Act of 2017 and affects many mixed-status families where the child is not yet a U.S. citizen or permanent resident.
Pro Tips
If you have a child turning 17 this year, consider whether any legitimate tax planning strategies can maximize your CTC in the final year of eligibility. For example, if you have flexible income timing (such as a year-end bonus or freelance payments), ensuring your income does not exceed the phase-out threshold in your child's last eligible year preserves the full $2,000 credit. After age 17, you can still claim the child as a dependent for the $500 Other Dependent Credit through age 18 (or 23 if a full-time student).
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During 2021, the American Rescue Plan temporarily increased the CTC to $3,000-$3,600 per child and delivered advance monthly payments of $250-$300 directly to 36 million families. This unprecedented experiment reduced child poverty by an estimated 30% during the months payments were active, lifting 3.7 million children above the poverty line. When the expanded credit expired at the end of 2021, child poverty rates returned to pre-expansion levels within months, providing a stark real-time illustration of the CTC's impact on family financial security.