What Is the Child Tax Credit, and Who Qualifies for It?

The Child Tax Credit (CTC) can reduce your federal income tax dollar for dollar, up to $2,200 for each qualifying child for tax year 2026. Part of it may be refundable, which means you can get some of it back even if you owe no tax. Whether you qualify depends on the child, your income, and whether the child has a Social Security number issued in time.

What is the Child Tax Credit, in plain terms?

A credit is different from a deduction. A deduction lowers the income that gets taxed. A credit lowers the tax itself. Revenue Procedure 2025-32 sets the 2026 maximum at $2,200 per qualifying child, and the refundable portion, the Additional Child Tax Credit (ACTC), at up to $1,700 per child. You figure the credit on Schedule 8812 (Form 1040), Credits for Qualifying Children and Other Dependents, and attach it to your Form 1040.

Who counts as a qualifying child?

The IRS Child Tax Credit guidance lists the main tests. A qualifying child generally must:

• Be under age 17 at the end of the tax year. For 2026, that means under 17 on December 31, 2026.
• Be your son, daughter, stepchild, eligible foster child, sibling, step-sibling, half-sibling, or a descendant of one of them, such as a grandchild or niece or nephew.
• Have lived with you for more than half the year.
• Not provide more than half of his or her own support.
• Be claimed as a dependent on your return, and not file a joint return (unless the joint return is only to get a refund of withheld or estimated tax).
• Be a U.S. citizen, U.S. national, or U.S. resident alien, with a Social Security number that is valid for work and was issued before your return's due date, including extensions.

How does income change the credit?

You get the full credit when your modified adjusted gross income is $200,000 or less, or $400,000 or less on a joint return. Above those amounts the credit is reduced. The Schedule 8812 instructions (2025 edition) and the IRS Child Tax Credit page both use these figures.

What does a worked example look like?

Illustration only, with made-up round numbers: Leila is a single parent. Her son Mateo is 9, lived with her all year, and has a valid Social Security number. Her tax before credits is $2,600, and her income is $30,000.

Step 1: Mateo qualifies for the full $2,200 credit, because Leila's income is far below $200,000.

Step 2: Subtract the credit from her tax: $2,600 minus $2,200 leaves $400.

If Leila's tax had been only $1,000, the credit would wipe out the tax, and part of the unused amount could come back as the ACTC, up to $1,700 for one child, depending on her earned income. Schedule 8812 walks through that math. The Schedule 8812 instructions (2025 edition) say the IRS cannot issue refunds for returns claiming the ACTC before mid-February, so do not plan around a specific deposit date.

What is the most common mistake?

Claiming a child who lived with the other parent for more than half the year. In a separated or divorced family, the custodial parent generally claims the child, unless that parent signs Form 8332 to release the claim, as Publication 17 explains. The second most common problem is a Social Security number that was not issued in time. A child without a valid number cannot be counted for the CTC, but the child may still count for the credit for other dependents if the child has another taxpayer identification number.

What should you do next?

Confirm each child's age as of December 31, check that each Social Security number is valid for work, and keep records showing where each child lived. If you share custody, decide before filing who claims the child, and whether Form 8332 applies. Then use the Schedule 8812 worksheet to see your full amount.

Here is one original tool you can use right now. Make a one-page sheet with one row per child:

1. Name and birth date (note whether the child turns 17 before December 31).
2. Social Security number and card, confirmed as valid for work.
3. Months the child lived with you this year, with one document as proof.
4. Whether any other adult could claim the same child, and whether a Form 8332 is on file.

If you want to learn more, see how it works.

Sources: Revenue Procedure 2025-32, sections 4.05(1) and 4.05(2) (2026 CTC and ACTC amounts); Instructions for Schedule 8812 (Form 1040) (2025 edition), Credits for Qualifying Children, SSN requirements, income limits, and refund timing; IRS Child Tax Credit web page (irs.gov/credits-deductions/individuals/child-tax-credit); IRS Publication 17, Your Federal Income Tax (2025 edition), qualifying child and Form 8332 sections; Form 1040 instructions. This is general information, not advice about your specific return.

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