Child Tax Credit Calculator 2025
Important: This calculator provides estimates based on 2025 Child Tax Credit rules. Tax situations vary. Consult a qualified tax professional for personalized advice.
Enter your information and click Calculate to see your estimated Child Tax Credit.
👨👩👧👦 Large Family
Max credit: $8,000. All refundable since income is under $400K.
💼 High Income Phaseout
$50K over $400K threshold → reduction of $2,500 (5 × $500). Credit reduced from $4,000 to $1,500.
👩👧👧 Single Parent, Low Income
Max credit: $4,000. No phaseout. Refundable limited by earned income: $22,000 × 15% = $3,300 vs $3,400 max → refundable $3,300.
🧑 Single Filer with Phaseout
$10K over $200K threshold → reduction of $500 (1 × $500). Credit reduced from $2,000 to $1,500.
👶 Low Income, Large Family
Max credit: $6,000. Refundable limited: $14,000 × 15% = $2,100 (vs $5,100 max refundable). Non-refundable = $6,000 - $2,100 = $3,900.
💰 High Income, Below Threshold
Under $400K threshold → no phaseout. Full $6,000 credit. Refundable limited to $5,100 (3 × $1,700).
🧒 What is the Child Tax Credit (CTC)?
The Child Tax Credit is a federal tax credit designed to help families with the cost of raising children. For the 2025 tax year, the credit provides up to $2,000 per qualifying child under age 17 at the end of the year. A portion of the credit — up to $1,700 per child — may be refundable through the Additional Child Tax Credit (ACTC), meaning you can receive it even if you owe no federal income tax.
🧮 The Formula (2025 Tax Year)
Step 1: Base Credit
Base Credit = Number of Qualifying Children × $2,000
Step 2: Income Phaseout
The credit is reduced by $50 for every $1,000 (or fraction thereof) that your AGI exceeds:
- $200,000 — Single, Head of Household (HOH), Married Filing Separately (MFS)
- $400,000 — Married Filing Jointly (MFJ)
(Capped so credit does not go below $0)
Step 3: Total Credit
Step 4: Refundable vs Non-Refundable Split
The refundable portion (ACTC) is the lesser of:
- Total Credit
- Number of Children × $1,700
- Earned Income Above Threshold × 15%
The earned income threshold for 2025 is $2,500. So:
Non-Refundable = Total Credit − Refundable Portion (capped at tax liability; simplified here as the remainder).
📋 Refundable vs Non-Refundable
Refundable (ACTC): If the refundable portion exceeds your total tax liability, the IRS sends you the difference as a refund. This makes the CTC valuable even for low-income families who owe little or no tax.
Non-Refundable: This portion can only reduce your tax bill to $0. Any excess is lost (unless it can be carried forward). In practice, most families with moderate incomes and tax liability can use the full non-refundable portion.
📉 Income Phaseout Explained
The phaseout mechanism ensures that higher-income families receive a reduced benefit. For every $1,000 (or fraction) of AGI above the threshold, your credit is reduced by $50.
Example: A married couple with $450,000 AGI ($50,000 over $400,000) has a reduction of 50 × $50 = $2,500. If they have 2 children ($4,000 base credit), their total credit drops to $1,500.
The phaseout applies to the entire credit (both refundable and non-refundable portions proportionally).
✅ Qualifying Child Requirements
- Age: Under 17 at the end of the tax year
- Relationship: Son, daughter, stepchild, foster child, sibling, half-sibling, stepsibling, or descendant
- Residency: Must have lived with you for more than half the year
- Support: Must not have provided more than half of their own support
- Tax Return: Cannot file a joint return with a spouse (unless only to claim a refund)
- Citizenship: Must be a U.S. citizen, national, or resident alien with a valid SSN
❓ Frequently Asked Questions
Consult a Tax Professional: This calculator is for educational and estimation purposes only. Tax laws are complex and subject to change. Individual circumstances may affect eligibility and credit amounts. Always consult a qualified CPA or tax preparer for advice specific to your situation.