IRS Publication 972: Child Tax Credit and Credit for Other Dependents
IRS Publication 972 is the official guide to the Child Tax Credit (CTC) and the Credit for Other Dependents (ODC). The Child Tax Credit offers up to $2,000 per qualifying child under age 17, with up to $1,700 refundable as the Additional Child Tax Credit. The Credit for Other Dependents provides $500 for dependents who do not qualify for the CTC — including children 17 and older, elderly parents, and disabled adult dependents. The publication covers the five qualifying child tests, income phaseout rules beginning at $200,000 (single) / $400,000 (married filing jointly), SSN and identification requirements, and the tiebreaker rules that apply when divorced or separated parents both claim the same child.
The Child Tax Credit and Credit for Other Dependents at a Glance
Child Tax Credit (CTC)
$2,000 per qualifying child under age 17. Up to $1,700 is refundable as the Additional Child Tax Credit (ACTC). The CTC begins to phase out when modified adjusted gross income (MAGI) exceeds $200,000 for single filers, head of household, and qualifying surviving spouse, or $400,000 for married filing jointly. The credit is reduced by $50 for each $1,000 (or fraction of $1,000) of income above the threshold. The 2021 temporary expansion to $3,000/$3,600 and full refundability has expired — the credit has returned to the permanent $2,000 structure.
Credit for Other Dependents (ODC)
$500 nonrefundable credit for each dependent who does not qualify for the Child Tax Credit. This covers children age 17 and older (such as high school seniors turning 17 during the year and college students), elderly parents or grandparents who qualify as your dependent, disabled adult children or siblings who rely on your support, and any other qualifying relative dependent. The dependent must be a U.S. citizen, U.S. national, or U.S. resident alien with a valid TIN (SSN, ITIN, or ATIN). The ODC phases out at the same $200,000/$400,000 thresholds as the CTC.
Additional Child Tax Credit (ACTC)
The refundable portion of the Child Tax Credit. For 2025, the ACTC equals the smaller of: the unused portion of the Child Tax Credit, or 15% of earned income exceeding $2,500 (up to the $1,700 refundable cap per child). Taxpayers with three or more qualifying children may use an alternative formula comparing Social Security taxes paid to the earned income credit. The ACTC provides a meaningful refund even for lower-income families whose CTC otherwise exceeds their tax liability.
Phaseout Calculation
The CTC and ODC share the same phaseout thresholds: $200,000 for single, head of household, and qualifying surviving spouse; $400,000 for married filing jointly. For married filing separately, the threshold is $200,000. The phaseout reduces total credits (CTC plus ODC combined) by $50 for every $1,000 of MAGI above the threshold. For example, a married couple with two qualifying children and MAGI of $420,000 would lose $1,000 of their $4,000 CTC ($50 x 20 increments of $1,000). The phaseout applies to the total credit pool — it does not distinguish between CTC and ODC.
2021 Temporary Expansion (Expired)
For tax year 2021 only, the American Rescue Plan temporarily increased the CTC to $3,000 per child aged 6-17 and $3,600 per child under 6, made the credit fully refundable, removed the earned income floor for refundability, and paid half the credit in advance monthly installments (July-December 2021). Taxpayers age 17 qualified for the first time. These provisions have EXPIRED. The credit has reverted to the $2,000 permanent structure for 2022 and beyond. Taxpayers who received advance payments in 2021 must reconcile those payments on their 2021 return using Letter 6419 — but this applies only to tax year 2021, not current years.
The Five Qualifying Child Tests for the Child Tax Credit
To claim a child for the Child Tax Credit, the child must satisfy all five of these tests. The tests apply as of the last day of the tax year (December 31 for calendar-year filers). A child who fails any single test cannot be claimed for the CTC — though they may still qualify for the Credit for Other Dependents.
1. Relationship Test
The child must be your son, daughter, stepchild, foster child (placed by an authorized agency or court), brother, sister, stepbrother, stepsister, half-brother, half-sister, or a descendant of any of these individuals (your grandchild, niece, or nephew). A legally adopted child or a child placed with you for legal adoption is treated as your own child. The relationship does not have to be biological — adopted, step, and foster relationships all qualify. A cousin does not qualify under the relationship test for CTC (though may qualify for ODC as a qualifying relative).
2. Age Test
The child must be under age 17 at the end of the tax year. This means the child is age 16 or younger on December 31. A child who turns 17 during the tax year (even on December 31) does not qualify for the CTC but may qualify for the $500 Credit for Other Dependents. There is no minimum age — a child born on December 31 qualifies. For the 2021 temporary expansion only, the age was under 18 (17 or younger), but that provision has expired.
3. Residency Test
The child must have lived with you for more than half of the tax year (more than 6 months, or 183+ days in a leap year). Temporary absences for school, vacation, medical care, military service, juvenile detention, or business count as time the child lived with you — the key question is whether the child's main home was with you. A child born or who died during the year is considered to have lived with you for the entire year if your home was the child's home for the entire time the child was alive. Children of divorced or separated parents are treated under special residency rules — see the tiebreaker section below.
4. Support Test
The child must not have provided more than half of their own financial support during the tax year. This is rarely an issue for young children but can arise for teenagers with substantial earned income, child actors, or children receiving large trust distributions. Support includes food, housing, clothing, education, medical care, and other necessities — calculated at fair market value. Scholarships received by a full-time student are not counted as support provided by the child. If the child is a full-time student, amounts received as scholarships are disregarded entirely for the support test.
5. Citizenship / SSN Test
The child must be a U.S. citizen, U.S. national, or U.S. resident alien, and must have a Social Security Number (SSN) that is valid for employment — issued by the Social Security Administration before the due date of the return (including extensions). An ITIN does not qualify a child for the CTC; the child must have a valid SSN. A child with an SSN that reads 'Not Valid for Employment' does not qualify. The SSN requirement was tightened significantly beginning with tax year 2018. For the Credit for Other Dependents, a broader set of identification is accepted including ITIN and ATIN.
Tiebreaker Rules for Divorced, Separated, or Unmarried Parents
When a child qualifies as a qualifying child for more than one person — common in shared custody, divorce, and multi-generational households — the IRS tiebreaker rules determine who may claim the CTC. Only one taxpayer may claim a given child for the Child Tax Credit and the dependency exemption in any tax year. If the parents file a joint return, no tiebreaker is needed. If the parents do not file jointly, these rules apply in the following order:
Rule 1: Parent vs. Non-Parent
If only one of the persons is the child's parent, the parent claims the child. A non-parent (grandparent, aunt, sibling, foster parent) cannot claim the CTC over a parent who also lived with the child for more than half the year, even if the non-parent provided more financial support. This is the strongest tiebreaker: parenthood trumps everything else when the parent meets the residency test.
Rule 2: Parent with Longer Residency
If both persons are the child's parents and the child lived with each parent for more than half the year, the parent with whom the child lived for the longer period during the year claims the child. If the child lived with each parent for exactly the same amount of time, the parent with the higher adjusted gross income claims the child. This is the most common tiebreaker in shared-custody arrangements where the child splits time equally between parents.
Rule 3: AGI Tiebreaker Among Non-Parents
If none of the persons claiming the child is the child's parent, the person with the highest adjusted gross income claims the child. This rule applies to grandparents, aunts/uncles, siblings, and other relatives or non-relatives who all qualify to claim the same child. The IRS does not weigh the relative closeness of the relationship — the AGI tiebreaker is purely mechanical.
Form 8332: Release of Claim to Exemption
A custodial parent (the parent the child lived with for the greater part of the year) may release the dependency exemption and CTC to the noncustodial parent by signing Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent. The noncustodial parent must attach the signed Form 8332 to their return. Without this form, the noncustodial parent cannot claim the CTC or dependency exemption even if the divorce decree or separation agreement assigns the exemption to them — the IRS follows the residency-based rules, not family court orders. The custodial parent may release the exemption for a single year, for a specific set of future years, or for all future years (revocable by filing a new Form 8332).
Special Rule: Divorced or Separated Parents Under a Written Agreement
A child is treated as the qualifying child of the noncustodial parent if: (1) the parents are divorced, legally separated under a decree of divorce or separate maintenance, separated under a written separation agreement, or lived apart at all times during the last 6 months of the year; (2) the child received over half of their support from the parents; (3) the child is in the custody of one or both parents for more than half the year; and (4) the custodial parent signs Form 8332 releasing the claim. Without all four conditions, the standard tiebreaker rules apply.
Common Child Tax Credit Problems & How We Solve Them
CTC Claimed by Wrong Parent
In shared-custody situations, both parents sometimes claim the same child. The IRS will flag the duplicate SSN and reject one or both returns. The tiebreaker rules (residency test) determine who is entitled. If you are the custodial parent and the noncustodial parent claimed the child without a signed Form 8332, you are entitled to the credit. We help file amended returns and resolve dependent disputes, including IRS correspondence audits and Notice CP87A cases.
SSN Not Valid for Employment
A child with an SSN that reads 'Not Valid for Employment' does not qualify for the CTC (though they may qualify for the $500 ODC). This often affects children of noncitizen parents who received an SSN for benefits purposes but not for work authorization. We identify whether the child qualifies for a valid-for-employment SSN or whether the ODC should be claimed instead. Filing with the wrong SSN type can result in a full CTC disallowance and a two-year ban on claiming the credit if the IRS determines the error was reckless.
Missing ITIN for Other Dependent
The $500 Credit for Other Dependents requires a valid TIN — SSN, ITIN, or ATIN. Many taxpayers with elderly parent dependents who lack SSNs do not realize they can apply for an ITIN (Form W-7) with the return. We help prepare Form W-7, gather the required documentation (original or certified passport, or other identity and foreign status documents), and file the return with the ITIN application. The ITIN must be applied for before or with the return — you cannot claim the ODC retroactively for a year where no TIN existed.
AGI Phaseout Surprise
Taxpayers whose income crosses the $200,000 (single) or $400,000 (MFJ) threshold for the first time are often caught off guard by the CTC and ODC phaseout. A raise, bonus, or significant capital gain can push MAGI over the threshold and reduce the credit by hundreds or thousands of dollars. We help project current-year income, assess whether year-end tax planning (retirement contributions, HSA contributions, deferring income) can preserve the credit, and calculate the exact phaseout impact.
Child Turning 17 During the Year
A child who turns 17 at any point during the tax year — even on December 31 — does not qualify for the $2,000 CTC. The credit drops from $2,000 to $500 (ODC) in the year the child turns 17. This is a common and painful surprise for parents who budgeted for the full credit. The 2021 temporary expansion (which covered 17-year-olds) has expired. We help families understand this timing rule and plan accordingly.
Post-2021 Confusion About Credit Amounts
Many taxpayers received advance monthly CTC payments in 2021 ($250-$300 per child per month from July through December) and mistakenly believe the enhanced credit is still in effect or that advance payments will resume. The 2021 expansion was a one-year provision. The credit has returned to $2,000 per child, up to $1,700 refundable, with no advance payment program. Taxpayers who set their withholding based on the higher 2021 credit may owe at filing time if they did not adjust. We review prior-year returns for 2021 reconciliation errors and help with current-year planning.