Claiming a minor child as a dependent no longer produces a personal exemption deduction — that amount was set to zero starting in 2018 and made permanent by the One Big Beautiful Bill Act in 2025.1Office of the Law Revision Counsel. 26 USC 151 – Allowance of Deductions for Personal Exemptions The claim still matters, though, because dependent status is the gateway to the Child Tax Credit (up to $2,200 per child in 2026), the Head of Household filing status with its larger standard deduction, and the Credit for Other Dependents.2Internal Revenue Service. Child Tax Credit Getting the claim right is what unlocks those dollars.
The Five Tests Your Child Must Pass
Federal law sets out five tests for a qualifying child, and every one must be met for the same tax year.3Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
- Relationship. The child must be your son, daughter, stepchild, foster child, sibling, half-sibling, or a descendant of any of these (a grandchild or niece, for example).
- Age. The child must be younger than you and under 19 at year-end. The cutoff rises to 24 if the child is a full-time student for at least five months of the year. There is no age limit for a child who is permanently and totally disabled.
- Residency. The child must share your home for more than half the year. Time away for school, medical care, or vacations still counts as living with you.
- Support. The child cannot have paid for more than half of their own living expenses — food, housing, clothing, medical costs.
- Joint return. The child cannot have filed a joint return with a spouse, unless it was only to claim a refund of withheld taxes.
On the student rule, the five months don’t have to be consecutive, and “full-time” is whatever the school treats as full-time attendance. Online-only and correspondence programs don’t count; accredited vocational programs do.
What the Claim Is Worth in 2026
The Child Tax Credit is the main payoff. For 2026, the maximum is $2,200 per qualifying child under age 17 at year-end.4Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit You get the full amount if your adjusted gross income is at or below $200,000 ($400,000 on a joint return); above those thresholds it phases down by $50 for every $1,000 of excess income.2Internal Revenue Service. Child Tax Credit
If your tax bill is small or zero, up to $1,700 per child can still come back to you as a refund through the Additional Child Tax Credit. That refundable portion requires at least $2,500 in earned income.2Internal Revenue Service. Child Tax Credit
For a dependent who doesn’t qualify for the Child Tax Credit (typically an older teen, or a qualifying relative rather than a qualifying child), the Credit for Other Dependents provides a flat $500 nonrefundable credit. It can zero out your tax bill but won’t generate a refund by itself.5Internal Revenue Service. Parents: Check Eligibility for the Credit for Other Dependents
Head of Household Filing Status
Claiming a qualifying child also opens Head of Household status, which carries a bigger standard deduction and wider tax brackets than filing single. For 2026, the standard deduction is $24,150 for Head of Household compared with $16,100 for single, a difference of $8,050.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
To use the status, you must be unmarried (or considered unmarried) on the last day of the year, pay more than half the cost of keeping up your home, and have a qualifying dependent who lived with you for more than half the year. The child you’re claiming usually handles the dependent piece, but the cost-of-home test is separate and has to be satisfied on its own.
The Taxpayer ID Requirement
Every dependent on your return needs a valid taxpayer identification number.7Office of the Law Revision Counsel. 26 USC 6109 – Identifying Numbers For most children this is a Social Security Number, applied for on Form SS-5.8Social Security Administration. Application for a Social Security Card A child who isn’t eligible for an SSN needs an Individual Taxpayer Identification Number (ITIN) obtained through Form W-7, and a child in the process of adoption without an SSN can use an Adoption Taxpayer Identification Number (ATIN) via Form W-7A.9Internal Revenue Service. Taxpayer Identification Numbers (TIN) Without one of these numbers, the IRS will reject the dependency claim during processing.
Watch for expired ITINs. An ITIN lapses if it hasn’t appeared on a federal return for three consecutive years, and you have to renew it before filing.10Internal Revenue Service. How to Renew an ITIN
Beyond the ID, keep records that back up residency and support: school enrollment, medical records, childcare receipts, and bank or expense records showing what you spent on the child. If the IRS questions the claim, that paperwork is what settles it.
How to Claim on Form 1040
Dependents go in the “Dependents” section on the first page of Form 1040. For each child you enter the full name, taxpayer ID, relationship to you, and check whether the child lived with you for more than half the year and whether you’re claiming the Child Tax Credit or the Credit for Other Dependents.11Internal Revenue Service. Form 1040 – 2025 U.S. Individual Income Tax Return Tax software walks through these questions based on the child’s age, living situation, and income. The IRS cross-checks each ID against other filed returns, so if someone else has already claimed the same child, both returns get flagged and refunds held while the agency sorts out entitlement.12Internal Revenue Service. Processing Status for Tax Forms
Divorced or Separated Parents
When parents live apart, the claim generally belongs to the custodial parent, meaning the parent the child lived with for the longer part of the year. The custodial parent can release the claim to the other parent by signing IRS Form 8332, which the noncustodial parent then attaches to their return for every year the release covers.3Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined13Internal Revenue Service. About Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
The release transfers the Child Tax Credit but not everything. The custodial parent keeps the right to file as Head of Household and to claim the Earned Income Tax Credit based on the child, if otherwise eligible. Divorce decrees and custody orders sometimes assign the tax claim, but the IRS won’t act on those documents by themselves; it accepts only Form 8332 or a substantially similar written declaration.
A custodial parent who wants to revoke a prior release does so on Form 8332 as well. The revocation takes effect no earlier than the tax year after written notice is given to the other parent, so a revocation delivered in 2026 first applies in 2027.
Tiebreakers When More Than One Person Qualifies
If more than one person meets all the tests for the same child, the IRS applies a fixed hierarchy:14Internal Revenue Service. Qualifying Child Rules
- A parent beats a non-parent.
- Between two parents, the one the child lived with longer during the year wins.
- If time was equal, the parent with the higher adjusted gross income wins.
- Among non-parents, the one with the highest adjusted gross income wins.
These rules apply automatically. If both people file claiming the child, the IRS uses the hierarchy to decide and adjusts the losing return.
When the Child Has to File Their Own Return
A child you claim as a dependent may still owe their own return, depending on how much and what kind of income they had. For 2025, a single dependent under 65 must file if earned income exceeds $15,750 or unearned income exceeds $1,350.15Internal Revenue Service. Check if You Need to File a Tax Return The earned income threshold tracks the standard deduction, which rises to $16,100 for 2026, so the 2026 filing threshold will move up with it.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill There’s also a combined test: the child must file if gross income is more than the larger of the unearned income threshold or earned income plus $450.16Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information Parents are responsible for filing when the child is too young to do it.
The Kiddie Tax on Investment Income
When a dependent has significant investment income, the kiddie tax stops families from parking assets in a child’s name to use the child’s lower bracket. For 2025, the first $1,350 of unearned income is tax-free, the next $1,350 is taxed at the child’s rate, and anything above $2,700 is taxed at the parent’s marginal rate. Form 8615 attaches to the child’s return whenever unearned income crosses that $2,700 line.17Internal Revenue Service. Instructions for Form 8615
The kiddie tax reaches children under 18, 18-year-olds who don’t provide more than half their own support, and full-time students under 24 who don’t provide more than half their own support. At least one parent must be alive at year-end.
If the child’s only income is interest and dividends totaling less than $13,500, Form 8814 lets you report that income on your own return instead of filing separately for the child.18Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income The shortcut can raise your own tax because the child’s income stacks on top of yours, so run it both ways before electing.
If You Claim a Child You Shouldn’t Have
A wrong claim carries real cost. The IRS imposes a 20% accuracy-related penalty on any underpayment caused by negligence or disregard of the rules, plus interest from the original due date.19Internal Revenue Service. Accuracy-Related Penalty The penalty can be waived for reasonable cause and good faith — a genuinely confusing custody situation, for example — but “I didn’t know” is a weak argument once the IRS has asked for documentation. If a claim looks intentional, the IRS can bar you from the Earned Income Tax Credit for two years, or ten years for fraud, even if you later have a legitimate qualifying child.
The most common way this goes wrong is two separated parents both claiming the same child without Form 8332 in place. Sort the paperwork out before filing season, or the tiebreaker rules will sort it out for you, usually with a balance due for whoever loses.