Child Tax Credit Calculator (USA)

Five tests must all pass. (1) Age: under 17 at end of tax year. (2) Relationship: your child, stepchild, foster child, sibling, half-sibling, step-sibling, or descendant of any of these (grandchild, niece, nephew). (3) Support: did not provide more than half their own support. (4) Residency: lived with you more than half the year (some exceptions for divorced parents). (5) Citizenship: US citizen, US national, or US resident alien with a valid SSN. ITIN-holders qualify for $500 Credit for Other Dependents, not CTC.

Doesn't matter. If your baby was born any time during the tax year and is alive at year-end, you get the full $2,000 credit. Even babies born December 31st qualify. You'll need to get your baby an SSN before filing taxes. Apply at the hospital when filling out the birth certificate (most states), or visit a Social Security office. Allow 4-6 weeks. You can file an extension if needed, but cannot claim CTC without the SSN.

The refundable portion (Additional Child Tax Credit or ACTC) is the lesser of: (a) the remaining credit after reducing your tax to zero, or (b) 15% of your earned income above $2,500, or (c) $1,700 per qualifying child. So if you earn very little, your refundable portion is limited. Example: with $10,000 earned income and 2 kids, max refundable = min(remaining credit, (10000-2500) × 0.15, 2 × 1700) = $1,125 in this case. With $30,000 earned and 2 kids: refundable = min(remaining, $4,125, $3,400) = $3,400.

Nonrefundable means the credit can only reduce your tax to zero, not below. If you owe $1,500 in tax and have $4,000 in nonrefundable credit, you owe nothing but you don't get the remaining $2,500 back as a refund. Refundable means you get the money back even if you owe no tax. CTC is partly nonrefundable, partly refundable. Up to $1,700 per child (in 2025) becomes refundable through the ACTC formula. This helps lower-income families who don't owe much tax still benefit.

Possibly. Various proposals have circulated since the temporary 2021 expansion ($3,000-$3,600 fully refundable, no work requirement). The 2017 TCJA's $2,000 CTC expires at end of 2025 and reverts to $1,000 in 2026 unless Congress acts. There's bipartisan interest in extending or expanding. Watch for legislation in 2025. If Congress doesn't act before tax year 2026 starts, the credit drops back to $1,000 per child, with $200k/$400k phase-out thresholds dropping to $75k/$110k.

Yes, you must file a tax return to claim CTC. There's no separate application. Even if you owe no tax and have low income, file to get the refundable portion. The IRS Free File program is free if AGI is under $79,000. VITA (Volunteer Income Tax Assistance) provides free tax preparation at libraries and community centers for moderate-income families. Many local non-profits offer free tax help. Don't pay a tax preparer to file a simple return if you qualify for free options.

Only one parent can claim each child. For married couples filing jointly, this isn't an issue. For divorced or separated parents, the IRS tiebreaker rules apply: typically the custodial parent (who has the child more nights) gets to claim. Some divorce agreements allow alternating years or specify which parent claims which child. Form 8332 lets the custodial parent release their claim to the noncustodial parent. Without Form 8332, the custodial parent gets the claim regardless of what the divorce decree says. The IRS will only honor one claim per child.