Child Tax Credit Calculator 2026: How Much You Get and Who Qualifies

The Child Tax Credit (CTC) is one of the most valuable tax credits available to American families. Unlike a deduction that reduces taxable income, a credit reduces your actual tax bill dollar for dollar. Here's exactly what you get and who qualifies.

2026 Child Tax Credit Basics

• Amount: $2,000 per qualifying child
• Refundable portion (ACTC): Up to $1,600 per child
• Age limit: Child must be under 17 at the end of the tax year
• Relationship: Must be your child, stepchild, foster child, sibling, or descendant
• Residency: Child must have lived with you for more than half the year
• Dependency: You must claim the child as a dependent
• Social Security Number: The child must have a valid SSN

Income Phase-Out: When It Starts to Reduce

The credit begins to phase out when your modified AGI exceeds:

• Single filers: $200,000
• Married filing jointly: $400,000

The reduction is $50 for every $1,000 of income above the threshold.

Example: Married couple earning $410,000. Threshold is $400,000. Excess = $10,000. Phase-out = $10,000 / $1,000 x $50 = $500 reduction per child. With 2 children, the credit drops from $4,000 to $3,500.

At $440,000 MFJ income with 2 children: ($440,000 - $400,000) / $1,000 x $50 x 2 = $4,000 total phase-out. Credit is fully phased out.

Real Example: $120,000 Income, 2 Children

A married couple filing jointly with:

• Combined income: $120,000
• Two children, ages 5 and 9
• No other credits or complex situations

Income is below the $400,000 MFJ threshold, so no phase-out applies.

Child Tax Credit calculation:

• 2 children x $2,000 = $4,000 total CTC

If their federal income tax liability is $8,000, the CTC reduces it to $4,000.

If their tax liability is only $1,500 (due to other deductions, withholding, etc.), the Additional Child Tax Credit (ACTC) comes into play.

The Additional Child Tax Credit (ACTC): The Refundable Portion

The CTC is partially refundable through the Additional Child Tax Credit. If the CTC exceeds your tax liability, you can receive up to $1,600 per child as a refund even if you owe no tax.

Refundable amount = the lesser of:

• The unused portion of the CTC (after reducing tax to $0)
• 15% x (earned income above $2,500)

Example: Same $120,000 family, but say they have significant deductions and their actual tax liability before the CTC is $1,200.

• CTC = $4,000
• Tax liability = $1,200
• CTC reduces tax to $0
• Unused CTC = $2,800
• ACTC cap = $1,600/child x 2 = $3,200
• Income test: ($120,000 - $2,500) x 15% = $17,625 (exceeds the $2,800, so not limiting)
• Refundable ACTC = $2,800 (they get this as a refund)

The full $2,800 of unused credit comes back to them as a refund.

Child Tax Credit for Single Parents

Single parents qualify on the same terms. The phase-out starts at $200,000 for single filers.

| Filing Status | Income | Children | CTC Amount | |--------------|--------|----------|-----------| | Single | $60,000 | 1 | $2,000 | | Single | $150,000 | 2 | $4,000 | | Single | $205,000 | 1 | $1,750 | | Single | $240,000 | 1 | $0 | | MFJ | $120,000 | 2 | $4,000 | | MFJ | $410,000 | 2 | $3,500 | | MFJ | $440,000 | 2 | $0 |

Other Child-Related Tax Credits

Child and Dependent Care Credit: Separate from CTC. Covers 20-35% of childcare costs up to $3,000 for one child, $6,000 for two or more. Phased out by income. Requires the child care to enable both parents to work.

Earned Income Tax Credit (EITC): Income-based, mostly for lower and middle income families. 3 children = up to $7,830 (2026). Maximum at around $50,000 income for MFJ with 3 kids, phases out above that.

Education credits: American Opportunity Credit (up to $2,500 for first 4 years college) and Lifetime Learning Credit apply when children reach college age.

CTC vs Dependent Deduction

The old personal exemption for dependents was eliminated in 2017. It has not been restored. The Child Tax Credit is now the primary federal tax benefit for having dependents, which is why it matters so much to families.

Run the Numbers

Use the Self-Employment Tax Calculator to model your total federal tax situation including the Child Tax Credit, ACTC, and other credits that reduce your bill.