Who Gets the Child Tax Credit and How It Works

The Child Tax Credit is a tax break for people who support children

The Child Tax Credit reduces the amount of federal income tax you owe, dollar for dollar. If you have children under 17 and meet the income and relationship requirements, you may be able to claim this credit when you file your taxes. The credit is worth up to $2,000 per child as of the 2024 tax year, though the exact amount depends on your income and filing status.

The credit works differently from a deduction. A deduction lowers your taxable income; a credit directly reduces your tax bill. This makes the Child Tax Credit more valuable — a $2,000 credit saves you $2,000 in taxes, not a fraction of that amount.

Key Takeaways

You must have a valid Social Security number for each child you claim, and the child must be under 17 at the end of the tax year.
Your income must fall below certain limits: $400,000 for married couples filing jointly, $200,000 for single filers, and $300,000 for heads of household.
The child must be your biological child, adopted child, stepchild, foster child, sibling, or descendant of any of these, and live with you for more than half the year.
You claim the credit on your federal tax return using Form 1040 and Schedule 8812, and the IRS will tell you the exact amount you receive.

Income limits that determine whether you can claim the credit

The Child Tax Credit begins to phase out — meaning it gets smaller — once your income exceeds a threshold. The threshold depends on how you file. If you are married and file jointly, the credit starts to reduce at $400,000 of income. If you file as single or as head of household, it starts to reduce at $200,000. If you are married and file separately, it starts to reduce at $200,000.

For every $1,000 of income above the threshold, the credit reduces by $50. This means the credit does not disappear entirely at the threshold — it shrinks gradually. If your income is close to the limit, you may still receive a partial credit. The IRS calculates the exact reduction when you file.

Who counts as your child for this credit

The child must be related to you by blood, marriage, or adoption. This includes your biological children, stepchildren, adopted children, foster children, and your siblings or their descendants (nieces and nephews). The child must also have lived with you for more than half of the tax year — not necessarily the calendar year, but the 12-month period you are filing for.

The child must be under 17 years old at the end of the tax year you are filing for. A child who turns 17 on December 31 does not count for that year; a child who turns 17 on January 1 of the next year does count. Each child must have a valid Social Security number, and you must claim them as a dependent on your return.

What you need to provide when you file

When you file your federal tax return, you will report the Child Tax Credit on Form 1040 (the main individual income tax form) and Schedule 8812 if your income is above certain thresholds or if you have more than four children. You will need each child's full name, date of birth, and Social Security number. You will also need to confirm your relationship to the child and that they lived with you for the required time.

You do not need to submit documents like birth certificates or proof of residence with your return — the IRS does not ask for these upfront. However, you should keep them in your records in case the IRS asks questions later. If you claim a child and the IRS cannot verify the information, they may reduce or deny the credit and ask you to provide proof.

How the credit works if you have multiple children

You can claim the credit for each child who meets the requirements. If you have three children under 17, you can claim up to $6,000 in credits (three times $2,000). The credit is not split among children — each child generates the full credit amount, up to the income limits.

If your total tax liability (the amount you owe before credits) is less than the total credit you are may have access to to, the remaining credit may be refundable. This means the IRS may send you the difference as a refund. However, the refundable portion is limited to $1,700 per child for the 2024 tax year, so very large credits may not be fully refundable.

What happens if your income changes during the year

Your income for the credit is based on your modified adjusted gross income (MAGI) for the entire tax year. If you earned more in some months and less in others, the IRS looks at your total for the year. This means a temporary job or bonus does not necessarily disqualify you — only your year-end total matters.

If you think your income will be close to the limit, you can estimate your year-end total and file accordingly. If you overestimate and claim a credit you should not have, you will owe the difference back when you file. If you underestimate and claim less than you are may have access to to, you can claim the additional credit when you file your return.

How to claim the credit on your tax return

You will report the Child Tax Credit on your Form 1040 when you file. The form has a line for the credit amount. If you use tax software, the software will ask you questions about each child and calculate the credit for you. If you file by hand or with a tax professional, they will use the information you provide to determine the amount.

The IRS will review your return and confirm the credit amount. If everything matches their records, you will receive the credit as a reduction in your tax bill or as a refund if the credit exceeds what you owe. If there is a discrepancy — for example, if the Social Security number does not match their records for that child — the IRS will contact you and may adjust the credit.

Frequently Asked Questions

Can I claim the credit for a grandchild or niece I support?

Yes, if the child lived with you for more than half the year and you provided more than half their financial support. The child must be your grandchild, niece, nephew, or sibling (or a descendant of any of these). You must also claim them as a dependent on your return, and they must have a valid Social Security number.

What if the child's other parent also claims them?

Only one person can claim a child as a dependent on their tax return. If both parents file and both claim the same child, the IRS will contact you and ask for proof of who should claim them. Generally, the parent with primary custody has the right to claim the child, but this can be negotiated between parents or determined by a custody agreement.

Does the child need to be a U.S. citizen?

The child must have a valid Social Security number, which is issued to U.S. citizens and certain residents. A child with an Individual Taxpayer Identification Number (ITIN) does not count for this credit. The child does not need to be a citizen, but they must have a Social Security number.

What if my child turned 17 during the year?

You cannot claim the Child Tax Credit for a child who is 17 or older at the end of the tax year. If your child turned 17 on December 31, they do not count for that year. If they turned 17 on January 1 of the next year, they count for the year they turned 16.

Can I claim the credit if I do not file a tax return?

You must file a federal tax return to claim the Child Tax Credit. Even if you do not owe taxes, filing allows you to receive the refundable portion of the credit. If your income is very low, you may not be required to file, but filing can result in a refund that exceeds any taxes you owe.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.