The Child Tax Credit (CTC) is one of the most valuable tax benefits available to families. For 2025, the credit is worth up to $2,000 per qualifying child under age 17, with a refundable portion of up to $1,700. Understanding the eligibility rules, phase-out thresholds, and refundable component helps families maximize the benefit.
Credit Amount
| Component | 2025 Amount |
|---|---|
| Maximum credit per qualifying child | $2,000 |
| Maximum refundable portion (Additional Child Tax Credit) | $1,700 |
| Non-refundable portion maximum | $300 |
A non-refundable credit reduces your tax liability to zero but cannot generate a refund on its own. The refundable Additional Child Tax Credit (ACTC) allows families with limited tax liability to receive some of the credit as a refund.
Who Is a Qualifying Child?
To claim the Child Tax Credit, a child must meet all of these tests:
- Age: Under 17 at the end of the tax year (so a child who turns 17 during 2025 does not qualify for 2025)
- Relationship: Your son, daughter, stepchild, foster child, sibling, or a descendant of any of these
- Dependent: Must be claimed as your dependent on your tax return
- Residency: Must have lived with you for more than half the tax year
- Support: Must not have provided more than half of their own financial support
- Social Security Number: Must have a valid SSN issued before the due date of your return
- Citizenship: Must be a U.S. citizen, U.S. national, or U.S. resident alien
Income Phase-Out Thresholds
The full $2,000 credit is available only up to the following income levels. Above these thresholds, the credit phases out by $50 for every $1,000 (or fraction thereof) that income exceeds the threshold.
| Filing Status | Phase-Out Begins At |
|---|---|
| Married Filing Jointly | $400,000 |
| All Other Filers | $200,000 |
The phase-out is relatively generous — most middle-income families receive the full credit. For a married couple with two children and $400,000 income, the full $4,000 credit is available. At $410,000, the credit phases out by $500 ($50 × 10 increments), reducing to $3,500.
Phase-Out Calculation
$$\text{Reduction} = \left\lceil \frac{\text{Income} - \text{Threshold}}{1{,}000} \right\rceil \times $50 \text{ per child}$$
Example: Single filer with two qualifying children, MAGI of $215,000.
- Income over threshold: $215,000 − $200,000 = $15,000
- Number of $1,000 increments: 15 (rounded up)
- Phase-out reduction: 15 × $50 = $750 total (applies across both children)
- Original credit: 2 × $2,000 = $4,000
- Reduced credit: $4,000 − $750 = $3,250
The Additional Child Tax Credit (ACTC): The Refundable Portion
If the non-refundable portion of the Child Tax Credit exceeds your tax liability, up to $1,700 per child can be refunded as the Additional Child Tax Credit. The ACTC is calculated as 15% of earned income above $2,500:
$$\text{ACTC} = 15% \times (\text{Earned Income} - $2{,}500)$$
Subject to the $1,700 per-child cap.
Example: A single parent with two children earns $30,000 in wages. Their federal income tax liability after other adjustments is $1,200.
- Child Tax Credit claimed: $1,200 (limited by tax liability — non-refundable portion)
- ACTC calculation: 15% × ($30,000 − $2,500) = 15% × $27,500 = $4,125
- But the ACTC is capped at $1,700 per child × 2 = $3,400
- The remaining CTC not covered by non-refundable amount: $4,000 − $1,200 = $2,800
- ACTC refund: min($2,800, $3,400) = $2,800 refunded
This family receives $1,200 in non-refundable credit (reducing tax to zero) and a $2,800 refund via the ACTC.
Child Tax Credit vs. Child and Dependent Care Credit
These are two separate credits — a common source of confusion:
| Credit | What It Covers | 2025 Max |
|---|---|---|
| Child Tax Credit | Simply having a qualifying child under 17 | $2,000/child |
| Child and Dependent Care Credit | Child care costs so you can work | $3,000–$6,000 × 20–35% |
A family can claim both if they have qualifying expenses. The Child and Dependent Care Credit requires documented child care costs (daycare, after-school programs, etc.) and is non-refundable for most income levels.
Claiming the Credit
The Child Tax Credit is claimed on Schedule 8812 (Credits for Qualifying Children and Other Dependents). You do not need to keep receipts or documentation specifically for the credit itself, but you must be able to prove the child lives with you and is your dependent if questioned by the IRS.
If you share custody, only one parent can claim a child as a dependent each year. The IRS has tiebreaker rules if both parents attempt to claim the same child, but coordination between parents (sometimes with a written agreement) is more practical.
Other Credits for Dependents
Qualifying children who do not meet the CTC age test (17 or older) or other dependents may qualify for the Other Dependent Credit of $500 (non-refundable). This applies to, for example, a 19-year-old college student you support or an elderly parent who lives with you.
Key Takeaways
- The Child Tax Credit is worth up to $2,000 per qualifying child under age 17 in 2025.
- The refundable portion (ACTC) is capped at $1,700 per child — essential for families with low tax liability.
- Phase-outs begin at $200,000 (single) and $400,000 (MFJ); reduction is $50 per $1,000 of excess income.
- A qualifying child must have a valid SSN, live with you more than half the year, be under 17, and meet other dependency tests.
- The ACTC is calculated as 15% of earned income above $2,500, subject to the $1,700 per-child cap.
- This credit is separate from the Child and Dependent Care Credit, which covers work-related child care expenses.