Child Tax Credit Calculator 2026: How Much Can You Claim?

The Child Tax Credit is one of the largest direct tax breaks available to American families — worth up to $2,200 per child in 2026 following the One Big Beautiful Bill Act (signed July 4, 2025). But the actual amount your family receives depends on your income, the number of qualifying children, and whether you have enough tax liability to use the non-refundable portion.

This guide walks through every piece of the calculation so you can estimate your credit before filing.

What the Child Tax Credit Is Worth in 2026

For the 2026 tax year, each qualifying child under 17 generates a potential credit of $2,200. That credit breaks into two pieces:

• Non-refundable portion: $500 — This can only reduce your federal income tax bill to zero. If you owe less than $500 in taxes per child, you lose this portion.
• Refundable portion (ACTC): $1,700 — This is the Additional Child Tax Credit. It pays out even if you owe no federal taxes, as long as you meet the earned income requirement.

A family with three qualifying children has a maximum potential credit of $6,600 — $5,100 of which could be refundable.

Income Phase-Out: Where the Credit Starts Shrinking

The $2,200-per-child credit is available at full value below these Modified Adjusted Gross Income (MAGI) thresholds:

Above those thresholds, the credit reduces by $50 for every $1,000 (or fraction thereof) of income over the limit.

Example: A married couple earning $402,500 — that's $2,500 over the $400,000 threshold. The phase-out reduction is $50 × 3 (rounding up to the nearest $1,000) = $150 reduction per child. With two children, that's a $300 total reduction, leaving them with $4,100 instead of $4,400.

How to Calculate Your Child Tax Credit Step by Step

Step 1 — Count your qualifying children

A qualifying child must meet all of these:

• Age: Under 17 on December 31, 2026
• Relationship: Your child, stepchild, foster child, sibling, or a descendant of any of these
• Residency: Lived with you for more than half of 2026
• Dependency: You claim them as a dependent on your return
• Social Security Number: Valid SSN issued before your return's due date
• Own support test: Did not provide more than half their own financial support

Step 2 — Determine your MAGI

For most people, MAGI equals Adjusted Gross Income (AGI) from line 11 of Form 1040. Certain additions apply if you have foreign income exclusions or student loan interest deductions — but for most W-2 earners, AGI = MAGI.

Step 3 — Apply the phase-out if applicable

If your MAGI exceeds $200,000 (single) or $400,000 (married), calculate:

1. MAGI minus threshold = excess income
2. Round excess income up to the nearest $1,000
3. Divide by $1,000 and multiply by $50
4. Multiply that number by your number of qualifying children
5. Subtract from your total potential credit

Step 4 — Check your tax liability for the non-refundable portion

The $500 non-refundable portion per child reduces your tax bill dollar-for-dollar. If your federal income tax liability (before credits) is less than the total non-refundable portion, you can only use what you owe — the rest disappears.

Example: A family with two children has $1,000 in non-refundable credit potential. If their federal tax liability is $700, they only capture $700 of that — the remaining $300 is lost.

Step 5 — Calculate the Additional Child Tax Credit (refundable portion)

The ACTC is the lesser of:

• 15% of your earned income above $2,500
• $1,700 × number of qualifying children

Example calculation for a family with two children and $45,000 earned income:

• Earned income above $2,500: $42,500
• 15% of $42,500: $6,375
• Maximum ACTC: $1,700 × 2 = $3,400
• Actual ACTC: $3,400 (since $6,375 > $3,400, the cap applies)

At higher income levels — typically above $25,000 for a family with two kids — the 15% calculation exceeds the per-child cap anyway, so the refundable portion maxes out at $1,700 per child.

Real Family Scenarios

Scenario A — Single parent, one child, $38,000 income:

• Full credit: $2,200
• No phase-out (income below $200,000)
• Tax liability: $1,200 → captures $500 non-refundable portion fully (tax drops to $700)
• ACTC: 15% × ($38,000 − $2,500) = $5,325 → capped at $1,700
• Total benefit: $500 tax reduction + $1,700 refund = $2,200

Scenario B — Married couple, three children, $95,000 income:

• Full credit: $6,600 (3 × $2,200)
• No phase-out
• Tax liability before credits: ~$7,200
• Non-refundable portion: 3 × $500 = $1,500 (fully usable since tax liability > $1,500)
• ACTC: 15% × ($95,000 − $2,500) = $13,875 → capped at 3 × $1,700 = $5,100
• Total benefit: $1,500 tax reduction + $5,100 refund = $6,600

Scenario C — Married couple, two children, $420,000 income:

• Potential credit: $4,400 (2 × $2,200)
• Phase-out: $420,000 − $400,000 = $20,000 excess → 20 increments × $50 × 2 children = $2,000 reduction
• Remaining credit: $2,400
• Non-refundable portion only (income too high for ACTC)
• Total: $2,400 applied against tax liability

The Other Dependent Credit: When Your Child Doesn't Qualify

If your child is 17 or 18, or a full-time student aged 19–24, or another qualifying relative who doesn't meet the CTC age test, you can claim the Other Dependent Credit — a flat, non-refundable $500 per person. It's smaller, but it's something.

Common Mistakes That Reduce Your Credit

Forgetting the SSN requirement. A surprising number of amended returns exist specifically because parents forgot to list their child's Social Security Number, or listed an ITIN. The child must have a valid SSN issued before the return due date.

Miscounting residency days. The child must have lived with you more than half the year — 183+ nights. For divorced or separated parents, the days each parent has the child matters.

Assuming phase-out doesn't apply. Many families in the $200,000–$240,000 range (single) or $400,000–$440,000 range (married) assume they either fully qualify or fully lose the credit. The phase-out is gradual — check the math.

Not checking earned income for ACTC. If your only income is from investments, rental properties, or a pension — not wages or self-employment income — the $2,500 earned income floor for the ACTC means you may not receive any refundable portion.

Comparing the CTC to Other Family Credits

The EITC typically provides much larger refunds for lower-income working families. The CTC provides substantial value across a wider income range.

When to Use a Calculator vs. Do the Math Manually

The calculation is straightforward for most families — two or three children, W-2 income, standard deduction. The IRS Free File tools, tax software (TurboTax, H&R Block, FreeTaxUSA), or a dedicated child benefits calculator will handle the computation in minutes.

Manual calculation matters when you're planning — trying to understand whether a raise crosses a phase-out threshold, whether contributing more to a 401(k) would bring MAGI below $400,000, or whether to shift investment income to a different year.

For planning purposes, remember: every $2,000 contributed to a traditional 401(k) that reduces MAGI from $402,000 to $400,000 can preserve up to $100 in Child Tax Credit per child. That's not a coincidence — it's a legitimate tax planning move.

Use the Calculator

Use our Child Benefits Calculator to estimate your 2026 Child Tax Credit based on your income and number of children. Select United States and enter your details for an instant estimate.

Related Guides

• Child Tax Credit 2025–2026 — complete 2025 tax year CTC guide with income tables
• Child Tax Credit vs ACTC — refundable vs non-refundable breakdown explained
• Earned Income Tax Credit 2026 — the other major US credit for working families
• Child Benefits Calculator — estimate your US, UK, Canada or Australia benefits

Figures reflect the 2026 tax year under the One Big Beautiful Bill Act (Public Law 119-21). Tax law can change — always verify current rates at IRS.gov before filing.