Dependents change the tax you owe mainly through credits. For federal returns, the personal exemption amount is zero for 2025 and later years, so claiming a dependent does not reduce taxable income directly. Instead, a qualifying child or qualifying relative can open the door to the Child Tax Credit (up to $2,200 per child under 17), the credit for other dependents ($500), the earned income credit, the child and dependent care credit and head of household filing status. Which of these apply depends on tests about relationship, residency, support, age and Social Security numbers.
Key takeaways
- For both tax year 2025 and tax year 2026 the maximum Child Tax Credit is $2,200 per qualifying child under age 17, and up to $1,700 of it can be refundable.
- The Child Tax Credit is not prorated by months: a child who passes the tests (including living with you more than half the year) generally carries the full credit.
- Between two parents, the child goes to the parent the child lived with longer; adjusted gross income (AGI) only breaks a tie in time.
- A child who is 17 or older can still qualify you for the $500 credit for other dependents, and a qualifying relative can too.
- Tax year 2025 is the return filed in early 2026; tax year 2026 is the return filed in 2027, and the year each figure belongs to is stated below.
Who counts as a dependent
The IRS sorts dependents into two groups, and each has its own tests in Publication 501 (2025).
Qualifying child
A qualifying child must meet a relationship test (child, stepchild, foster child, sibling, descendant of one of those, and similar), an age test, a residency test, a support test and a joint return test. The age test is under 19 at year-end, or under 24 if a full-time student, or any age if permanently and totally disabled; in each non-disabled case the child must also be younger than you (or your spouse on a joint return). The residency test requires the child to have lived with you for more than half the year, with exceptions for temporary absences such as school, for a child born or who died during the year, and for children of divorced or separated parents. The child also cannot have provided more than half of their own support.
Qualifying relative
A qualifying relative is someone who is not your qualifying child (or anyone else's) and who is either related to you in a listed way or lived with you all year as a member of your household. Two money tests apply. The person's gross income must be below a set amount, which was $5,200 for 2025 in Publication 501 and is $5,300 for 2026 under Revenue Procedure 2025-32. You must also generally provide more than half of the person's total support for the calendar year, which includes housing, food, clothing, medical care and similar necessities.
Rules that apply to both
The person generally cannot file a joint return (apart from a refund-only claim) and must be a US citizen, US national or US resident alien, or a resident of Canada or Mexico. If you can be claimed as someone else's dependent, you cannot claim anyone as your own. You must list a Social Security number (SSN) for each dependent on Form 1040; a dependent who cannot get an SSN may use an individual taxpayer identification number (ITIN) or adoption taxpayer identification number (ATIN), but that choice does not qualify you for every credit, as the next section shows. A missing or wrong number can cause tax benefits to be disallowed.
Credits a dependent can bring
Each credit has its own age rule and number requirement, so one person can qualify you for one credit and not another.
| Benefit | Tax year 2025 | Tax year 2026 | Key conditions |
|---|---|---|---|
| Child Tax Credit | Up to $2,200 per child | Up to $2,200 per child | Child under 17 at year-end, claimed as a dependent, valid SSN issued by the return due date (with extensions); you need a valid SSN too (on a joint return, one spouse needs a valid SSN and the other an SSN or ITIN); full credit at modified AGI up to $200,000 ($400,000 joint), then reduced by $50 for each $1,000 or part of $1,000 above that |
| Additional Child Tax Credit (refundable part) | Up to $1,700 per child | Up to $1,700 per child | Earned income above $2,500; the refundable amount is 15% of earned income over $2,500, capped at $1,700 per child and at the unused credit; families with three or more qualifying children may use an alternative calculation based on Social Security and Medicare taxes paid |
| Credit for other dependents | Up to $500 per dependent | Up to $500 per dependent (the 2026 Form W-4 uses $500) | Dependents who do not qualify for the Child Tax Credit, such as a child 17 or older or a qualifying relative; SSN, ITIN or ATIN; same income phase-out as the Child Tax Credit; nonrefundable |
| Earned income credit with children | Maximum $4,328 (one child), $7,152 (two), $8,046 (three or more); $649 with none | Maximum $4,427 (one child), $7,316 (two), $8,231 (three or more); $664 with none | Child under 19, or under 24 if a full-time student, or disabled; lived with you in the US more than half the year; child needs a valid SSN; investment income limit $11,950 for 2025 and $12,200 for 2026; the credit phases out as income rises |
| Child and dependent care credit | Rate up to 35% | Rate up to 50% (50% only at AGI of $15,000 or less; 35% for most middle incomes; never below 20%) | Qualifying person generally under 13 or unable to care for self; you (and your spouse on a joint return) generally need earned income; expenses capped at $3,000 (one person) or $6,000 (two or more); nonrefundable |
Sources for the table: the IRS Child Tax Credit page and the 2025 Schedule 8812 instructions for 2025, with the $50-per-$1,000 phase-out taken from lines 9–12 of the 2025 Schedule 8812 itself; Revenue Procedure 2025-32 for the 2026 Child Tax Credit, refundable portion and earned income credit figures; the IRS earned income credit tables for 2025; the IRS earned income credit qualifying child rules for the child age and residency tests; the IRS child and dependent care credit page; and the 2026 Form W-4 for the $500 other-dependent amount.
No proration by months
The Child Tax Credit is not split by months. A child who lived with you for seven months and meets every other test is a qualifying child for the full credit, and one who lived with you five months is not your qualifying child at all, unless an exception applies: a temporary absence such as school, a child born or who died during the year, or the divorced-parent rule below that lets a custodial parent release the claim. The age test uses the child's age on the last day of the year: a child who turns 17 on December 30 does not qualify for the Child Tax Credit, though the child may qualify you for the $500 credit for other dependents.
Refundable and nonrefundable parts
A nonrefundable credit can reduce your tax to zero but not below. The Child Tax Credit has a refundable slice, the Additional Child Tax Credit, that can produce a refund when your tax is lower than the credit. The credit for other dependents and the child and dependent care credit have no refundable part. The IRS also cannot issue any refund before mid-February on a return that claims the earned income credit or the Additional Child Tax Credit, and that delay applies to the whole refund.
A worked example for 2026
Illustrative example, not a forecast, using round numbers and tax year 2026 figures from Revenue Procedure 2025-32. A married couple filing jointly has $90,000 of wages and takes the $32,200 standard deduction, leaving $57,800 of taxable income. Tax uses the 2026 joint brackets: 10% on the first $24,800 and 12% on the rest up to $100,800.
Tax before credits = 10% × $24,800 + 12% × ($57,800 − $24,800)
= $2,480 + $3,960 = $6,440
| Household | Credits | Tax after credits |
|---|---|---|
| No dependents | $0 | $6,440 |
| Two children, ages 8 and 5 | 2 × $2,200 = $4,400 | $6,440 − $4,400 = $2,040 |
| One child age 8, one child age 19 (full-time student) | $2,200 + $500 = $2,700 | $6,440 − $2,700 = $3,740 |
Two young children cut the bill by $4,400, or 68% of the original $6,440; the older student cuts it by only $500 because the child credit stops at 17. These figures ignore other credits and other taxes.
A lower-income case shows the refundable part. Illustrative example: a single parent filing as head of household has $30,000 of wages and one child age 8. The head of household standard deduction for 2026 is $24,150, leaving $5,850 taxable, taxed at 10% for $585.
Unused credit = $2,200 − $585 = $1,615
Refundable limit = 15% × ($30,000 − $2,500) = $4,125
Additional Child Tax Credit = smallest of $1,615, $1,700, $4,125 = $1,615
The $585 of tax goes to zero and a further $1,615 comes back as a refund, so the whole $2,200 is used. The earned income credit, which this family would likely also claim, is not included here. The refundable part shrinks when earnings are very low: at $10,000 of wages this household would owe no tax, and the 15% limit would cap the refundable credit at 15% × ($10,000 − $2,500) = $1,125.
Shared custody and tie-breakers
More than one person can meet the qualifying child tests for the same child, but only one can claim the child for the Child Tax Credit, head of household status, the earned income credit and dependent care benefits. The IRS tie-breaker rules in Publication 501 run in order. In these rules "parent" means a biological or adoptive parent, so a stepparent or foster parent counts only after adopting the child.
- If only one of the people is the child's parent, the parent gets the child.
- If the parents file a joint return, the child is theirs together.
- If the parents do not file jointly and both claim the child, the child goes to the parent the child lived with longer during the year. Only if the time is equal does the parent with the higher AGI get the child.
- If no parent can claim the child, the child goes to the person with the highest AGI.
- If a parent could claim the child but no parent does, another person with the highest AGI may claim the child only if that AGI is higher than the highest AGI of any parent who could claim the child.
A special rule applies to children of parents who are divorced or legally separated under a decree, separated under a written separation agreement, or who lived apart at all times during the last six months of the year, when the parents together provided over half the child's support and the child was in the custody of one or both of them for more than half the year. The custodial parent is the one the child lived with for more nights (with equal nights, the parent with the higher AGI), and that parent generally keeps the claim.
The custodial parent can release the child tax credit, the additional child tax credit and the credit for other dependents to the other parent by signing Form 8332 or a similar statement, which the other parent must attach to their return. The release does not move head of household status, the earned income credit or the child and dependent care credit; those stay with the custodial parent. A custody order alone does not decide the outcome.
Head of household and care costs
A dependent can also change your filing status. Head of household requires that you be unmarried or considered unmarried on the last day of the year, that you paid more than half the cost of keeping up a home, and that a qualifying person lived with you more than half the year. A dependent parent is the main exception, since the parent does not have to live with you if you meet the home-cost rules for the parent. For 2026 the standard deduction is $24,150 for head of household and $16,100 for single, a difference of $8,050 of deduction, per Revenue Procedure 2025-32.
The child and dependent care credit is separate. It covers work-related care expenses for a qualifying person under 13 (or one who cannot care for themselves), and for 2026 the IRS says the maximum rate is 50% of qualifying expenses, up from 35%. You (and your spouse on a joint return) must have earned income, though a spouse who was a full-time student or unable to care for themselves is treated as having some, and when parents split a child, only the custodial parent can claim this credit.
The 50% rate applies only at AGI of $15,000 or less. Under 26 U.S.C. § 21 it drops one point for each $2,000 above that, reaching 35% at AGI just over $43,000, stays at 35% up to $75,000 ($150,000 joint), then falls again but never below 20%. Expenses are capped at $3,000 for one person and $6,000 for two or more. The largest 2026 credit is therefore $1,500 or $3,000 at the lowest incomes, and $1,050 or $2,100 at the 35% rate, which covers, for example, a joint return with $90,000 of AGI.
A dependent can also change your paycheck. Step 3 of the 2026 Form W-4 asks for $2,200 per qualifying child under 17 and $500 per other dependent if your total income will be $200,000 or less ($400,000 if married filing jointly), which reduces withholding now and shrinks the refund later.
Frequently asked questions
Can a child with a job still be my dependent?
For a qualifying child, a job does not disqualify the child by itself; the test is whether the child provided more than half of their own support. A qualifying relative must have gross income below $5,300 for 2026 ($5,200 for 2025). A dependent's own standard deduction for 2026 is capped at the greater of $1,350 or $450 plus earned income, and it cannot exceed the regular standard deduction for the dependent's filing status.
What happens if I claim a child the IRS gives to someone else?
The IRS disallows your claim to the benefits tied to that child. In one Publication 501 example, unmarried parents who both claim their child see the lower-AGI parent's Child Tax Credit disallowed and, with no other qualifying person, that parent's head of household status, child and dependent care credit and exclusion for dependent care benefits too; that parent may still qualify for the earned income credit as a worker without a qualifying child.
Does a baby born in December count for the whole year?
A child born during the year is treated as having lived with you more than half the year if your home was the child's home for more than half the time the child was alive. The child still needs a valid SSN issued by the return due date, and you can file for an extension while waiting for it.
Do I need a Social Security number for every dependent?
You must show an SSN for each dependent on Form 1040. A dependent without one can use an ITIN or ATIN and still support the $500 other-dependent credit, but the Child Tax Credit and the earned income credit each require the qualifying child to have a valid SSN. From tax year 2025 the Child Tax Credit also requires a valid SSN for you, or for at least one spouse on a joint return.
Can an unrelated person who lives with me be my dependent?
Possibly, as a qualifying relative, if the person lived with you all year as a member of your household and meets the gross income and support tests. That person does not count as a qualifying person for head of household status, though, because that status requires a listed family relationship.
A short checklist before you file
- For each person, write down birth date, relationship, months in your home and who paid for what.
- Sort each into qualifying child or qualifying relative, and check age and the gross income limit for the right year.
- Confirm every dependent's SSN (or ITIN/ATIN) matches Social Security records and is on hand before the due date.
- If a child spent time with another household, apply the tie-breaker rules and get Form 8332 where one parent is releasing the claim.
- Rerun your Form W-4 or the IRS withholding estimator if a child was born, adopted or changed households.
This article is general education about federal rules, not tax advice; state rules and individual facts differ, and a tax professional can apply them to a specific return.
Sources
- IRS, Publication 501 (2025), Dependents, Standard Deduction, and Filing Information
- IRS, Child Tax Credit
- IRS, 2025 Instructions for Schedule 8812
- IRS, 2025 Schedule 8812 (Form 1040), Credits for Qualifying Children and Other Dependents
- IRS, Revenue Procedure 2025-32 (tax year 2026 inflation adjustments)
- IRS, Child and dependent care credit
- IRS, Earned income credit qualifying child rules
- IRS, Earned income and earned income tax credit tables
- 26 U.S.C. § 21, Expenses for household and dependent care services (Legal Information Institute)
- IRS, 2026 Form W-4
