You can claim a foster child on your taxes when the child was placed in your home by a state or local agency, a tribal government, a licensed placement organization, or a court order, and the child meets the IRS tests for age, residency, support, and joint filing. Meeting those conditions makes the child your dependent and unlocks the Child Tax Credit (worth up to $2,200 per child for tax year 2026), the Earned Income Tax Credit, Head of Household filing status if you’re single, and, if you go on to adopt, the Adoption Tax Credit. Which credits you actually receive depends heavily on the identification number the child has: a Social Security Number opens every door, while an ATIN or ITIN limits you to smaller credits.
Who Counts as a Qualifying Foster Child
The placement itself is the first hurdle. The IRS treats a foster child as your qualifying child only when the child was placed with you by an authorized agency, a tax-exempt organization licensed by a state, a tribal government, or a court order.1Internal Revenue Service. Qualifying Child Rules – Section: Relationship A handshake arrangement with a relative or friend won’t get you there. You need the placement letter or court order in your file.
After that, four tests apply:
- Age. The child must be under 19 at the end of the year and younger than you, or under 24 if a full-time student. A child with a permanent and total disability has no age limit.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information – Section: Qualifying Child
- Residency. The child must live with you for more than half the year. Temporary absences for school, medical care, or vacation don’t count against you.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information – Section: Qualifying Child
- Support. The child cannot have provided more than half of their own support. Foster care payments from a government agency or licensed organization count as support from the state, not from the child, so those payments do not disqualify you.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information – Section: Qualifying Child
- Joint return. The child did not file a joint return with a spouse, unless it was filed only to claim a refund of withheld or estimated taxes.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information – Section: Qualifying Child
The residency test is where mid-year placements get tight. A child placed with you on July 1 is right at the edge, and a placement a few days later won’t clear the “more than half the year” bar for that tax year. Keep a dated log of when the child arrived and left; if the IRS asks, that log is your proof.
Are Foster Care Payments Taxable
No. Stipends you receive for caring for a foster child are excluded from your gross income when they come through a state, local, or tribal government or a licensed placement agency. The tax code calls these “qualified foster care payments,” and you do not report them on your return.3Office of the Law Revision Counsel. 26 USC 131 – Certain Foster Care Payments
Difficulty-of-care payments, which compensate you for caring for a child with physical, mental, or emotional challenges, are also excluded. The exclusion covers up to 10 foster children under 19 and up to 5 who are 19 or older.3Office of the Law Revision Counsel. 26 USC 131 – Certain Foster Care Payments
If you receive Medicaid waiver payments that qualify as difficulty-of-care payments, you have an option: you can choose to include them in your earned income when calculating the Earned Income Tax Credit or the Additional Child Tax Credit. Electing to count them can push your refund higher when your other earned income is low. It’s all or nothing, though. You include every qualifying payment or none of them.4Internal Revenue Service. Certain Medicaid Waiver Payments May Be Excludable From Income
Head of Household Status for Single Foster Parents
If you’re unmarried and a qualifying foster child lived with you for more than half the year, you can file as Head of Household rather than Single.5Internal Revenue Service. Qualifying Child Rules The 2026 standard deduction for Head of Household is $24,150, compared with $16,100 for Single filers.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill That is $8,050 in additional income shielded from tax before any credits come into play, and Head of Household filers also get wider tax brackets, so more income is taxed at lower rates.
The Credits Available to Foster Parents
Child Tax Credit
The Child Tax Credit is worth up to $2,200 per qualifying foster child under age 17 for the 2026 tax year.7Internal Revenue Service. Child Tax Credit It begins phasing out when adjusted gross income exceeds $200,000 (single) or $400,000 (married filing jointly), dropping $50 for every $1,000 over the threshold.
When your tax liability is too small to absorb the full credit, the refundable Additional Child Tax Credit can send up to $1,700 per child back as a refund.7Internal Revenue Service. Child Tax Credit The child needs a valid Social Security Number for either credit. An ATIN or ITIN will not qualify.
Earned Income Tax Credit
For low- and moderate-income foster families, the EITC often produces the largest refund. For 2026, a Head of Household filer with one qualifying child can receive roughly $4,400, with income limits around $51,600, and the credit scales up with additional children. The qualifying child must have a valid Social Security Number.5Internal Revenue Service. Qualifying Child Rules An ATIN or ITIN will not work. If you’re waiting on a Social Security card for a newly placed child, the EITC is not available for that child until the number is issued.
Child and Dependent Care Credit
If you pay for daycare, after-school care, or a babysitter so you can work or look for work, you can claim a percentage of those costs for a foster child under 13. Eligible expenses cap at $3,000 for one child or $6,000 for two or more, and the percentage runs from 20% to 35% depending on your income.8Internal Revenue Service. Child and Dependent Care Credit Information The credit is nonrefundable, so it can zero out your tax bill but won’t generate a refund by itself.
Credit for Other Dependents
When a foster child doesn’t qualify for the Child Tax Credit, whether because they’re 17 or older or because they lack a Social Security Number, the Credit for Other Dependents is worth up to $500 per dependent.7Internal Revenue Service. Child Tax Credit It accepts an ITIN or ATIN. The same income phase-outs apply, and the credit is nonrefundable.
Adoption Tax Credit
If you move toward adopting your foster child, qualified adoption expenses like attorney fees, court costs, home study fees, and travel can support the Adoption Tax Credit. The 2025 maximum is $17,280 per eligible child.9Internal Revenue Service. Adoption Credit – Section: Qualified Expenses It’s nonrefundable, but unused amounts carry forward for up to five years. Adopting a foster child whom the state or tribal government has formally determined to have “special needs” gives you the full credit even without substantial out-of-pocket expenses.10Internal Revenue Service. Instructions for Form 8839 Hold onto the written determination; the IRS can ask for it.
Which Identification Number the Child Needs
The identification number on the child’s line of your return decides which credits you can actually claim.
- Social Security Number. Required for the Child Tax Credit, the Additional Child Tax Credit, and the EITC. Apply through the Social Security Administration as soon as the child is placed with you if one isn’t already on file.
- Adoption Taxpayer Identification Number (ATIN). A temporary number for a child being adopted when you can’t obtain an SSN in time to file. Apply on Form W-7A. An ATIN supports the Credit for Other Dependents and the Adoption Tax Credit, but not the EITC or the Child Tax Credit.11Internal Revenue Service. Adoption Taxpayer Identification Number – Section: ATIN Questions and Answers
- Individual Taxpayer Identification Number (ITIN). For a child not eligible for an SSN. Like the ATIN, it works for the Credit for Other Dependents but not the EITC or Child Tax Credit.
On Form 1040, enter each child’s name and identification number in the Dependents section and check the box that reflects whether the child qualifies for the Child Tax Credit or the Credit for Other Dependents. That checkbox drives the credit calculations the IRS applies to your return, so it needs to match the identification number you used.
Keep the placement letter or court order with your tax records, along with a log of the dates the child lived with you. If the IRS reviews your return, that paperwork is your evidence for both the placement and the residency test.
What Happens If Someone Else Already Claimed the Child
When you e-file, the IRS matches identification numbers against everything already submitted. If another taxpayer has claimed the same foster child, your return is rejected immediately. That is more common than you’d think, especially when a biological parent and a foster parent each believe the claim is theirs.
Once you’re locked out of e-filing, the only path forward is a paper return sent by mail. Paper returns take substantially longer to process because the IRS has to investigate which taxpayer has the valid claim. Send the return by certified mail so you have proof of the filing date, and include copies of your placement documentation.
The IRS resolves competing claims under the tie-breaker rules in Section 152 of the tax code.12Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined The hierarchy:
- Parent versus non-parent. A biological or adoptive parent beats a foster parent, provided the parent also lived with the child for more than half the year.
- Two parents not filing jointly. The parent the child lived with longer wins. If time was equal, the parent with the higher adjusted gross income prevails.
- No parent in the running. The taxpayer with the highest adjusted gross income wins.12Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
The practical read for foster parents: if the biological parent did not live with the child for more than half the year, your claim has priority. If the biological parent did have the child in their home for over six months, perhaps before the child entered foster care, you’ll usually lose the tie-breaker no matter your income. Losing a disputed claim means repaying credits you already received, plus interest and possible penalties, so it’s worth confirming the child’s full-year living history before you file.