Who Claims a Child on Taxes If You’re Unmarried?

If you’re unmarried and share a child with the other parent, whoever the child lived with for more nights during the year is the parent who claims the child on taxes. When you both live in the same household as the child, the tie goes to the parent with the higher adjusted gross income. These IRS tiebreaker rules run automatically, but a parent who lives apart from the other can hand the Child Tax Credit to the non-custodial parent by signing Form 8332.¹

When You and the Other Parent Live Apart

The IRS calls the parent the child spent more nights with the custodial parent, and that parent has the default right to claim the child. Count actual overnights, not daytime hours or where the child ate dinner. A night the child spent somewhere other than a parent’s home, such as summer camp, doesn’t count toward either side’s total.²

If the count comes out exactly even, the tiebreaker moves to income: whichever parent had the higher AGI for the year gets the claim. That means the right to claim can shift year to year if one parent’s income changes and the nights truly split fifty-fifty.³

When You Live in the Same Home

Unmarried parents often still share a household with their child, and this is the situation most tax guidance skips. When both of you live with the child, the child qualifies as a qualifying child of both parents. The residency test produces a tie because the child lived with each of you the same amount of time, so the claim goes to the parent with the higher AGI for the year.⁴

There is no Form 8332 workaround for this. Form 8332 exists for parents who live apart, where one is clearly custodial and the other is not. When you both live together, the higher-AGI parent claims the child, or that parent simply chooses not to claim and lets the other parent do it. What you cannot do is split the child, and you cannot use Form 8332 to hand specific benefits between you.

Letting the Other Parent Claim the Child

If you live apart and you’re the custodial parent, you can release the claim to the other parent by signing IRS Form 8332. A verbal agreement won’t do it. Neither will a family court order directing one parent to claim the child. For agreements executed from 2009 onward, the signed Form 8332 (or a substantially similar written declaration) is the only documentation the IRS accepts.⁵

On the form, the custodial parent writes their name and Social Security number, the child’s name, and the tax year or years being released. A separate form goes with each child. The release can cover one year, a set of specific years, or all future years.⁶

The non-custodial parent then attaches the signed form to their return every year they claim the child. If they file electronically, they hold onto the signed original and produce it if the IRS asks.

Revoking the Release

Signing away “all future years” isn’t permanent. The custodial parent can revoke the release by filling out Part III of Form 8332 and specifying which future years are being pulled back. The revocation applies no earlier than the tax year after the custodial parent gives the other parent a copy of the revocation or makes a reasonable effort to do so.⁷

So if you revoke in 2025 and notify the other parent, the earliest year you can claim the child again is 2026. Attach a copy of the revocation to your return for each year you reclaim the child, and keep proof that you delivered or tried to deliver the notice.

What the Custodial Parent Keeps

Form 8332 hands over the Child Tax Credit. It does not hand over everything. Three benefits stay with the parent the child actually lived with, no matter what any agreement or court order says:

Head of Household filing status, available only to the parent who paid more than half the cost of maintaining the home the child lived in for more than half the year. For 2026, the Head of Household standard deduction is $24,150 against $16,100 for single filers, a difference of $8,050.⁸
The Earned Income Tax Credit, which follows where the child lived rather than who claims the dependency. For 2026, the maximum EITC ranges from roughly $4,400 with one child to over $8,200 with three or more children.
The child and dependent care credit for daycare or after-school care that lets you work.

The custodial parent who signs Form 8332 keeps all three. The non-custodial parent who receives the release gets the Child Tax Credit (worth up to $2,200 per qualifying child for 2026) but cannot file as Head of Household on that child and cannot count that child for the EITC.⁵

The IRS still treats the child as meeting the residency requirement for the custodial parent’s Head of Household status, even after that parent has released the dependency claim.⁹ So a custodial parent with lower income may still benefit more from keeping Head of Household and the EITC than the non-custodial parent gains from the Child Tax Credit. Run the numbers before signing.

If You Both Try to Claim the Same Child

The IRS catches it. Whichever return files first electronically goes through. The second return gets rejected because the child’s Social Security number has already been used on another return.¹⁰

The rejected parent can still file a paper return claiming the child, which forces the IRS to sort it out. Both parents then receive Notice CP87A. The notice identifies the disputed child by the last four digits of the Social Security number and asks each parent to look again at whether they were actually entitled to the claim.¹¹

If the CP87A arrives and you’re the one entitled to the claim, you don’t need to respond or send documents at that stage. If you realize you claimed the child in error, file an amended return on Form 1040-X. If neither parent amends, the IRS examines both returns and applies the tiebreaker rules to decide.

What an Incorrect Claim Costs

The parent who claimed the child incorrectly pays back the refund they got from the improper claim, plus interest running from the date the refund was issued. On top of that, the IRS can add an accuracy-related penalty of 20 percent of the resulting tax underpayment for negligence or disregard of the rules.¹²

It gets worse if the EITC was involved. The IRS can bar a taxpayer from claiming the EITC for two years if the improper claim came from reckless or intentional disregard of the rules, or ten years if it was fraudulent.¹³ A two-year ban on a parent with two children can mean losing over $14,000 in credits. Claiming a child you know the other parent is entitled to is one of the quickest routes to that ban.

Court Orders Don’t Override the IRS

A family court judge can order one parent to claim the child, and the IRS is not bound by it. If the parent the court designates isn’t the custodial parent under federal tax rules and doesn’t hold a signed Form 8332, the IRS will reject the claim regardless of what the custody paperwork says. The order may give you grounds for a contempt action back in family court, but it won’t change what happens on your tax return.⁵

1
Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
2
Internal Revenue Service. Claiming a Child as a Dependent When Parents Are Divorced, Separated or Live Apart
3
Internal Revenue Service. Qualifying Child Rules 3
4
Internal Revenue Service. Qualifying Child Rules
5
Internal Revenue Service. Publication 504, Divorced or Separated Individuals
6
Internal Revenue Service. About Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
7
Internal Revenue Service. Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
8
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
9
Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information
10
Internal Revenue Service. Handling Processing Errors
11
Internal Revenue Service. Understanding Your CP87A Notice
12
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
13
Internal Revenue Service. What to Do if We Deny Your Claim for a Credit