Child Tax Credit 2026: Amount, Refundability, SSN Rules and Phaseouts

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: For 2026 the child tax credit is $2,200 per qualifying child under 17, with up to $1,700 refundable. It phases out by $50 per $1,000 of modified AGI above $200,000 ($400,000 joint), and both the child and at least one parent need a Social Security number.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

The child tax credit (CTC) is the largest tax break most families with kids receive. The 2025 tax law (OBBBA) made the credit permanent at a higher level, indexed it for inflation and added a Social Security number requirement for parents. For 2026 the credit is $2,200 per qualifying child.

This guide covers who qualifies, how much is refundable, how the phaseout works, how the credit interacts with early retirement and low-income years, and the planning ideas worth knowing. Figures are from Rev. Proc. 2025-32 and IRS guidance as of October 27, 2026. Also see the credit checklist and tax planning guide.

CPA Warning Label: The child tax credit rewards having children, which is the only part of parenting that pays you instead of the other way round. Read the SSN rules before assuming you qualify.

2026 amount and refundability

For tax year 2026:

The credit first reduces your tax to zero. If some is left, the refundable additional child tax credit (ACTC) can pay out up to $1,700 per child, limited to 15% of earned income above $2,500. Families with three or more children may use an alternative formula based on Social Security taxes paid if it yields more.

So a family with two kids and enough tax liability gets $4,400 off its bill. A family with no tax liability and $20,000 of earned income could get a refund of up to 15% times $17,500, or $2,625, capped at $3,400 for two kids.

Qualifying child rules

A qualifying child for the CTC must:

• Be under age 17 at the end of the year.
• Be your son, daughter, stepchild, eligible foster child, sibling, step-sibling, half-sibling or a descendant of any of them (for example, a grandchild or niece).
• Live with you for more than half the year (with exceptions for temporary absences, births and deaths, and divorced parents using Form 8332).
• Not provide more than half of their own support.
• Be claimed as your dependent and not file a joint return (other than only to claim a refund).
• Be a U.S. citizen, national or resident alien.

A child who turns 17 during the year does not qualify for the CTC that year, but may qualify for the $500 credit for other dependents. Older dependents, including college students and dependent parents, also fall in the $500 category.

SSN requirements

The child must have a Social Security number valid for employment issued before the due date of the return. Starting with 2025 returns, OBBBA also requires a valid SSN for the taxpayer claiming the credit, or for at least one spouse on a joint return. A parent with only an ITIN, filing alone, cannot claim the credit.

A child with an ITIN instead of an SSN does not qualify for the CTC but may qualify for the $500 credit for other dependents.

Practical tip: apply for a newborn's SSN at the hospital. If it is not issued by the filing deadline, extend the return rather than file without the credit.

Phaseout thresholds

The credit is reduced by $50 for every $1,000 (or part of $1,000) of modified AGI above:

• $400,000 for married filing jointly.
• $200,000 for all other filers.

These thresholds are not indexed for inflation. The reduction applies to the total of all child and other dependent credits. A couple with two children loses all $4,400 at $488,000 of MAGI.

In the phaseout, every extra $1,000 of income costs an extra $50 of credit, a 5-point bump on top of your marginal rate. See hidden marginal tax rates. Pre-tax 401(k) contributions, HSA contributions and other above-the-line items reduce MAGI and can restore credit.

Planning tips

• Watch the phaseout zone. If MAGI is between $400,000 and $488,000 joint with two kids, maximize pre-tax contributions first.
• Divorced or separated parents: the custodial parent can release the claim with Form 8332. Coordinate so the parent who gets the most value claims the child.
• Early retirees: low taxable income can make the credit partly nonrefundable unused. Because the refundable piece requires earned income, a retiree living on portfolio withdrawals may lose the refundable part. Doing Roth conversions to fill the credit is a common idea: conversion income creates tax liability the nonrefundable credit can absorb, making some conversions effectively tax-free.
• Combine with other credits: the dependent care credit and the saver's credit also stack, but nonrefundable credits apply in a set order.
• Withholding: claim the credit on Form W-4 Step 3 so your paycheck reflects it rather than waiting for a refund.

Illustration

A FIRE family uses the credit

Jordan and Lee retired early with two kids, ages 8 and 11. They live on $60,000 a year from taxable brokerage sales (mostly basis) and cash. Their taxable income is close to zero, so the $4,400 credit goes unused. They have no earned income, so no refundable ACTC.

They convert $60,000 from traditional IRA to Roth. After the $32,200 standard deduction, taxable income is $27,800. The tax on that (10% on the first $24,800 and 12% on the rest) is about $2,840. The $4,400 child credit wipes it out. They could convert a bit more, roughly $73,000 total, before the credit runs out, all at a zero federal tax cost.

The conversion also raises AGI, which can affect ACA premium credits and state taxes. Run the whole picture before converting.

A high earner in the phaseout

Riley and Sam earn $450,000 joint with three kids; their credit is $6,600 less $2,500 = $4,100. Adding $24,500 of pre-tax 401(k) contributions lowers MAGI to $425,500 and the reduction to $1,300, restoring $1,200 of credit on top of the deduction.

Special situations

Births, deaths and adoptions

A child born at any time during the year, even December 31, is treated as living with you for the whole year, so you get the full credit for that year if the SSN arrives in time. The same is true for a child who died during the year after living with you. An adopted child, or a child lawfully placed for adoption, is treated as your own child. Adoptive parents should also look at the adoption credit, which for 2026 is up to $17,670 of qualified expenses.

Married filing separately

Filing separately does not eliminate the credit, but the phaseout begins at $200,000 for each spouse, and only one parent can claim each child. Couples who file separately for student loan or liability reasons should compare both ways.

Living abroad

U.S. citizens living overseas can claim the credit for qualifying children with SSNs. However, taxpayers who exclude foreign earned income using Form 2555 cannot claim the refundable ACTC, which matters for expat families with low U.S. tax liability.

Tie-breaker rules

If a child qualifies for more than one person, for example a parent and a grandparent sharing a home, the IRS tie-breaker rules generally give the claim to a parent first, then to the person with the highest AGI. Families can choose who claims if all eligible people agree and the claimant passes the rules.

Penalty for bad claims

If the IRS determines a claim was reckless or intentionally wrong, it can bar you from claiming the credit for two years (ten for fraud). Erroneous refund claims can also carry a 20% penalty. The credit is generous, which is exactly why it is audited.

What it is not

The CTC is not the dependent exemption (which is $0 under current law), not the earned income credit (a separate refundable credit for lower earners), and not the new Trump account seed money ($1,000 for children born 2025 through 2028), which is deposited into a child's account rather than paid on your return. See Trump accounts for that one.