Who Can Claim a Child for the Child Tax Credit?
link to page 2 link to page 2 
INSIGHTi
Who Can Claim a Child for the Child Tax
Credit?
February 10, 2022
The child tax credit was expanded for one year—2021—by the American Rescue Plan Act of 2021
(ARPA; P.L. 117-2), and up to half of the 2021 credit was advanced to taxpayers in monthly payments
issued between July and December of 2021. While ARPA expanded the credit and changed its delivery,
the only change ARPA made to the qualifying child rules was to increase the maximum age limit of the
child from 16 years to 17 years for 2021 only. This Insight provides a brief overview of who can claim a
child for the child tax credit.
Qualifying Child Rules
In order for a taxpayer to be able to claim a child for the child tax credit on their tax return, the child must
meet several requirements for that year as identified in Table 1. Failure to meet any of these requirements
generally means the taxpayer cannot claim the child for purposes of the credit in that year.
Some of these requirements or tests are characteristics intrinsic to the child, like the child’s age or
whether the child supports themselves financially. Others—like the relationship and residency tests in
Table 1—are requirements specifically connecting the taxpayer and the child. These tests in particular
can help identify which taxpayer can claim a child for the credit.
Congressional Research Service
https://crsreports.congress.gov
IN11853
CRS INSIGHT
Prepared for Members and
Committees of Congress
link to page 2 link to page 2 link to page 2 link to page 2 link to page 2 Congressional Research Service
2
Table 1. Tests/Requirements to Claim a Child as a Qualifying Child for the Child Tax Credit
Test/Requirement
Description
Child vis à vis taxpayer
Relationshipa
The child must be the taxpayer’s
child,b
grandchild (or great-grandchild),b
sibling,b
niece/nephew, or
foster child placed with the taxpayer either by an authorized placement
agency or court order.
Residency
The child must have lived with the taxpayer for more than half of the year.c
Child
Age
In 2021, the child must be under 18 years old as of the last day of 2021.
In all other years, the child must be under 17 years old as of the last day of
the year.
Support
The child does not provide more than half of their own financial support.
Joint Return
The child has not filed a joint income tax return with their spouse.
Citizenship/Residency
The child must be a U.S. citizen, resident, or national.
Identification (ID) Number
The child’s taxpayer ID must be provided (in addition to the child’s name) in
order for the credit to be issued to the taxpayer. The taxpayer ID must be
issued on or before the due date of the return.
From 2018 to 2025, the ID must be a social security number (SSN) associated
with work authorization. After 2025, the ID can be any SSN, an individual
taxpayer identification number (ITIN), or an adoption taxpayer identification
number (ATIN).
Source: Internal Revenue Code (IRC) Sections 24 and 152.
Notes:
a. A taxpayer’s cousin generally does not meet the qualifying child’s relationship test.
b. This includes by adoption or remarriage (i.e., stepchildren) and “half” relatives (e.g., half siblings).
c. There is an exception to this rule in certain cases of children of divorced or separated parents who meet
requirements under IRC Section 152(e). In addition, exceptions to the residency test exist for certain temporary
absences.
Relationship Test
Most types of relatives of a child meet the relationship test: parents, grandparents, aunts/uncles, and
siblings all meet this test. Legal guardianship—where the child is placed with an adult by a court order—
would meet this test (the child would be considered a “foster child” under this test), regardless of the
actual biological relationship between the child and taxpayer.
Because of the relationship test, kinship care by some of the child’s relatives (i.e., grandparents/great
grandparents, aunts/uncles, siblings) would meet the relationship requirement. However, other types of
kinship care—like informal caretaking of a child by a close family friend (i.e., no legal guardianship)—
would not.
Congressional Research Service
3
Residency Test
Under the residency test, children must live with the taxpayer for more than half the year. This is
sometimes called the “six months and a day rule.” The movement of children between different
households from year to year may mean that a child meets the residency requirement with a particular
taxpayer in one year but not in the next year. This may be of particular concern with the 2021 credit
because the advance payments of the 2021 credit were based on older tax data, even though eligibility for
the expanded credit depends on whether children meet these tests for 2021.
Specifically, the advance payments were based on an estimate of a taxpayer’s 2021 child credit using
2020 income tax return information (or if unavailable, information from 2019 income tax returns). These
older data were also used to estimate whether a child was the taxpayer’s qualifying child for 2021.
Taxpayers with children who met these rules in 2020, but not in 2021, could be required to repay some of
the advance payments. This may occur, for example, among certain divorced parents who trade off
claiming the child for the credit from one year to the next.
If a child fails to meet the residency test of any taxpayer—for example, because the child spent three
months each in four different family members’ houses—the child would generally not be able to be
claimed by any taxpayer as a qualifying child for the credit in that year.
Multigenerational Households and Tiebreaker Rules
The qualifying child rules of the child credit can lead to situations where more than one taxpayer may be
able to claim a child for the credit. This can occur in multigenerational households, such as when a child
lives for more than half the year with a parent and a grandparent. In cases where more than one taxpayer
may be eligible to claim a child, there are specified tiebreaker rules to determine who can claim these
children. These tiebreaker rules prioritize the claims of parents over those of nonparents. Among
competing claims of nonparents, the rules prioritize the taxpayer with the highest adjusted gross income
(AGI).
Author Information
Margot L. Crandall-Hollick
Specialist in Public Finance
Disclaimer
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff
to congressional committees and Members of Congress. It operates solely at the behest of and under the direction of
Congress. Information in a CRS Report should not be relied upon for purposes other than public understanding of
information that has been provided by CRS to Members of Congress in connection with CRS’s institutional role.
CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United
States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However,
Congressional Research Service
4
as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the
permission of the copyright holder if you wish to copy or otherwise use copyrighted material.
IN11853 · VERSION 1 · NEW
INSIGHTi
Who Can Claim a Child for the Child Tax
Credit?
February 10, 2022
The child tax credit was expanded for one year—2021—by the American Rescue Plan Act of 2021
(ARPA; P.L. 117-2), and up to half of the 2021 credit was advanced to taxpayers in monthly payments
issued between July and December of 2021. While ARPA expanded the credit and changed its delivery,
the only change ARPA made to the qualifying child rules was to increase the maximum age limit of the
child from 16 years to 17 years for 2021 only. This Insight provides a brief overview of who can claim a
child for the child tax credit.
Qualifying Child Rules
In order for a taxpayer to be able to claim a child for the child tax credit on their tax return, the child must
meet several requirements for that year as identified in Table 1. Failure to meet any of these requirements
generally means the taxpayer cannot claim the child for purposes of the credit in that year.
Some of these requirements or tests are characteristics intrinsic to the child, like the child’s age or
whether the child supports themselves financially. Others—like the relationship and residency tests in
Table 1—are requirements specifically connecting the taxpayer and the child. These tests in particular
can help identify which taxpayer can claim a child for the credit.
Congressional Research Service
https://crsreports.congress.gov
IN11853
CRS INSIGHT
Prepared for Members and
Committees of Congress
link to page 2 link to page 2 link to page 2 link to page 2 link to page 2 Congressional Research Service
2
Table 1. Tests/Requirements to Claim a Child as a Qualifying Child for the Child Tax Credit
Test/Requirement
Description
Child vis à vis taxpayer
Relationshipa
The child must be the taxpayer’s
child,b
grandchild (or great-grandchild),b
sibling,b
niece/nephew, or
foster child placed with the taxpayer either by an authorized placement
agency or court order.
Residency
The child must have lived with the taxpayer for more than half of the year.c
Child
Age
In 2021, the child must be under 18 years old as of the last day of 2021.
In all other years, the child must be under 17 years old as of the last day of
the year.
Support
The child does not provide more than half of their own financial support.
Joint Return
The child has not filed a joint income tax return with their spouse.
Citizenship/Residency
The child must be a U.S. citizen, resident, or national.
Identification (ID) Number
The child’s taxpayer ID must be provided (in addition to the child’s name) in
order for the credit to be issued to the taxpayer. The taxpayer ID must be
issued on or before the due date of the return.
From 2018 to 2025, the ID must be a social security number (SSN) associated
with work authorization. After 2025, the ID can be any SSN, an individual
taxpayer identification number (ITIN), or an adoption taxpayer identification
number (ATIN).
Source: Internal Revenue Code (IRC) Sections 24 and 152.
Notes:
a. A taxpayer’s cousin generally does not meet the qualifying child’s relationship test.
b. This includes by adoption or remarriage (i.e., stepchildren) and “half” relatives (e.g., half siblings).
c. There is an exception to this rule in certain cases of children of divorced or separated parents who meet
requirements under IRC Section 152(e). In addition, exceptions to the residency test exist for certain temporary
absences.
Relationship Test
Most types of relatives of a child meet the relationship test: parents, grandparents, aunts/uncles, and
siblings all meet this test. Legal guardianship—where the child is placed with an adult by a court order—
would meet this test (the child would be considered a “foster child” under this test), regardless of the
actual biological relationship between the child and taxpayer.
Because of the relationship test, kinship care by some of the child’s relatives (i.e., grandparents/great
grandparents, aunts/uncles, siblings) would meet the relationship requirement. However, other types of
kinship care—like informal caretaking of a child by a close family friend (i.e., no legal guardianship)—
would not.
Congressional Research Service
3
Residency Test
Under the residency test, children must live with the taxpayer for more than half the year. This is
sometimes called the “six months and a day rule.” The movement of children between different
households from year to year may mean that a child meets the residency requirement with a particular
taxpayer in one year but not in the next year. This may be of particular concern with the 2021 credit
because the advance payments of the 2021 credit were based on older tax data, even though eligibility for
the expanded credit depends on whether children meet these tests for 2021.
Specifically, the advance payments were based on an estimate of a taxpayer’s 2021 child credit using
2020 income tax return information (or if unavailable, information from 2019 income tax returns). These
older data were also used to estimate whether a child was the taxpayer’s qualifying child for 2021.
Taxpayers with children who met these rules in 2020, but not in 2021, could be required to repay some of
the advance payments. This may occur, for example, among certain divorced parents who trade off
claiming the child for the credit from one year to the next.
If a child fails to meet the residency test of any taxpayer—for example, because the child spent three
months each in four different family members’ houses—the child would generally not be able to be
claimed by any taxpayer as a qualifying child for the credit in that year.
Multigenerational Households and Tiebreaker Rules
The qualifying child rules of the child credit can lead to situations where more than one taxpayer may be
able to claim a child for the credit. This can occur in multigenerational households, such as when a child
lives for more than half the year with a parent and a grandparent. In cases where more than one taxpayer
may be eligible to claim a child, there are specified tiebreaker rules to determine who can claim these
children. These tiebreaker rules prioritize the claims of parents over those of nonparents. Among
competing claims of nonparents, the rules prioritize the taxpayer with the highest adjusted gross income
(AGI).
Author Information
Margot L. Crandall-Hollick
Specialist in Public Finance
Disclaimer
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff
to congressional committees and Members of Congress. It operates solely at the behest of and under the direction of
Congress. Information in a CRS Report should not be relied upon for purposes other than public understanding of
information that has been provided by CRS to Members of Congress in connection with CRS’s institutional role.
CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United
States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However,
Congressional Research Service
4
as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the
permission of the copyright holder if you wish to copy or otherwise use copyrighted material.
IN11853 · VERSION 1 · NEW