Grandparent Child Tax Credit for a Grandchild: CTC, ACTC and ODC Explained

If you claim your grandchild as a qualifying child, you may be eligible for up to $2,200 in Child Tax Credit per child for the 2026 tax year. But whether that money actually reaches you depends on your income type — and this is where retired grandparents on fixed incomes often hit a wall.

How the Credit Breaks Down

The child tax benefit under IRC § 24 has three components, all calculated on Schedule 8812:

Child Tax Credit (CTC): Up to $2,200 per qualifying child under age 17 with a valid Social Security number. This is nonrefundable — it reduces your tax bill dollar for dollar but cannot drop it below zero.

Additional Child Tax Credit (ACTC): Up to $1,700 per child as a refundable credit. This is the part that can generate an actual refund check. But it requires earned income: the formula is 15 percent of your earned income above $2,500, capped at $1,700 per child.

Credit for Other Dependents (ODC): A flat $500 nonrefundable credit for dependents who do not qualify for the CTC — such as a grandchild aged 17 or 18, a disabled adult dependent, or a qualifying relative.

The Earned Income Problem for Retired Grandparents

Social Security benefits, pensions, and annuities are not earned income. A grandmother living on $18,000 in Social Security and $12,000 in pension income has zero earned income. That means the ACTC formula produces $0 (15% of $0 minus $2,500 equals nothing). The nonrefundable CTC of $2,200 also provides no benefit because her tax liability is already zero after deductions.

The result: a retired grandparent who legitimately claims a grandchild as a dependent and files as head of household may receive no Child Tax Credit at all. This is not an error — it is how the statute works. The credit was designed around working parents.

What Retired Grandparents Can Still Claim

Even with no earned income, you are not shut out entirely:

• Head of household filing status gives you a larger standard deduction ($24,150 versus $16,100 for single filers in 2026), plus the senior additions if you are 65 or older.
• Credit for Other Dependents may apply if the child is 17 or older, or if you claim them under the qualifying relative pathway rather than the qualifying child pathway. The $500 ODC is nonrefundable, so it only helps if you have some tax liability to offset.
• Earned Income Tax Credit is off the table entirely without earned income.

If a working family member in the household (an adult child living with you, for example) could claim the grandchild instead and has earned income above $2,500, the family may receive more total benefit by having that person claim the child — provided they meet all the qualifying child tests and tiebreaker rules.

The SSN Requirement

The grandchild must have a Social Security number valid for employment, issued before the tax return due date, including extensions. A child with only an ITIN or Adoption Taxpayer Identification Number does not qualify for the $2,200 CTC or ACTC — only the $500 ODC. For tax year 2026, the taxpayer also needs a valid SSN; on a joint return, one spouse needs a valid SSN and the other needs an SSN or ITIN issued by the due date, including extensions.

Doing the Math Before You File

Our US Kinship Tax Guide includes a credit eligibility worksheet that walks through the CTC, ACTC, and ODC calculations based on your actual income sources — so you know exactly what to expect before your tax appointment.

See more United States guides →