Child Tax Credit Calculator – $2000 Per Child & Phaseout Estimator

Why Two Kids Under 17 Means $4000 Credit But $80k AGI Keeps It Full?

Child tax credit is $2,000 per qualifying child under age 17 at end of tax year. Two kids under 17 = $4,000 total credit before phaseout. Other dependents age 17 or older or other qualifying relative = $500 each. Example 2 kids under 17 plus 1 other dependent 18 years old college = $4,000 + $500 = $4,500 total before phaseout.

Phaseout starts at AGI $200,000 single, head of household, married separate and $400,000 married joint. Credit reduces $50 for each $1,000 over threshold. Example single AGI $80,000 under $200k threshold no reduction full $4,000. Example single AGI $220,000 $20k over threshold 20×$50=$1,000 reduction $4,000-$1,000=$3,000 after phaseout. Example joint AGI $410,000 $10k over $400k threshold 10×$50=$500 reduction $4,000-$500=$3,500.

Refundable additional child tax credit ACTC up to $1,700 per child under 17 if CTC exceeds income tax liability. Example tax liability $1,000 CTC $4,000 nonrefundable $1,000 covers liability $0 tax plus refundable ACTC $1,700 per child ×2 = $3,400 max refundable but limited to CTC amount minus nonrefundable used.

How To Use This Child Tax Credit Tool — 4 Quick Steps

Step 1 — Enter number of children under 17. Example 2 children under 17 at year end qualifying for $2,000 each.

Step 2 — Enter other dependents. Example 0 other dependents age 17+ or qualifying relative $500 each. Example 1 other dependent 19 year old = $500.

Step 3 — Choose filing status and AGI. Filing Joint threshold $400k, Single $200k, Head $200k, Separate $200k. AGI example $80,000 under threshold no phaseout, $220,000 single over threshold reduction.

Step 4 — Calculate. Hit Calculate Child Tax Credit. See CTC before phaseout = kids×$2000 + other×$500, AGI vs threshold, phaseout reduction = ceil((AGI-threshold)/1000)×$50, CTC after phaseout, refundable ACTC up to $1,700 per child, proposal $2,500 comparison = kids×$2500 + other×$500.

How It Calculates — Formula & Methodology

Source: IRS Topic 606 Child Tax Credit, IRS Form 8812, IRS Publication 501 for filing status thresholds.

CTC Before = Kids × $2,000 + Other × $500
Threshold = $200k Single/Head/Separate, $400k Joint
Over = Max(0, AGI - Threshold)
Reduction = Ceil(Over / $1,000) × $50
CTC After = Max(0, CTC Before - Reduction)
ACTC Refundable = Min(Kids × $1,700, CTC After portion for kids) up to $1,700 per child
Proposal $2,500 = Kids × $2,500 + Other × $500
Proposal Reduction same phaseout

Verification with 2 kids 0 other joint AGI $80,000:

• CTC Before = 2×$2,000 + 0×$500 = $4,000
• Threshold joint $400,000, AGI $80,000 under threshold Over $0 Reduction $0
• CTC After = $4,000 - $0 = $4,000 total credit
• ACTC refundable = 2×$1,700 = $3,400 max refundable if credit exceeds liability
• Proposal $2,500 = 2×$2,500 + 0 = $5,000 would be $1,000 more than current $4,000

Verification with 2 kids 0 other single AGI $220,000:

• CTC Before $4,000, Threshold single $200,000, Over $20,000, Ceil(20,000/1000)=20, Reduction 20×$50=$1,000
• CTC After $4,000-$1,000=$3,000 total credit
• ACTC refundable 2×$1,700=$3,400 max but limited to $3,000 CTC after = $3,000 refundable max if no liability, proposal $5,000-$1,000=$4,000 after phaseout

Guards: kids 0-10, other 0-10, AGI floor 0, reduction capped at CTC before, ACTC capped at kids×$1,700 and CTC after, non-finite→0.

What Results Mean — Only Necessary Details

CTC Before Phaseout: Kids×$2,000 + Other×$500. Example 2 kids 0 other = $4,000 before phaseout.

Phaseout Reduction: $50 per $1,000 over threshold. Example single AGI $220k $20k over threshold 20×$50=$1,000 reduction.

CTC After Phaseout: Before minus reduction. Example $4,000-$1,000=$3,000 after phaseout total credit.

Refundable ACTC: Up to $1,700 per child under 17 refundable if credit exceeds tax liability. Example 2 kids up to $3,400 refundable, limited to CTC after.

Other Dependents $500: $500 per other dependent age 17+ or qualifying relative, nonrefundable, included in total.

Proposal $2500: Would be kids×$2500 + other×$500 before phaseout. Example 2 kids $5,000 vs current $4,000 $1,000 more, after phaseout single $220k $4,000 vs $3,000 current.

Example — No Phaseout vs Phaseout vs Other Dependent

Base: 2 kids 0 other joint AGI $80k → Before $4,000 Threshold $400k Over $0 Reduction $0 After $4,000 ACTC up to $3,400 Proposal $5,000 would be $1,000 more.

Single AGI $220k 2 kids: Before $4,000 Threshold $200k Over $20k Reduction $1,000 After $3,000 ACTC up to $3,000 Proposal $5,000 before $4,000 after phaseout saves $1,000 more than current $3,000.

Joint AGI $410k 2 kids: Before $4,000 Threshold $400k Over $10k Reduction $500 After $3,500 ACTC up to $3,400 Proposal $5,000 before $4,500 after vs $3,500 current $1,000 more.

1 kid + 1 other dependent joint $80k: Before $2,000 + $500 = $2,500 After $2,500 ACTC up to $1,700 for kid portion Other $500 nonrefundable Proposal $2,500 + $500 = $3,000 would be $500 more.

3 kids joint $80k: Before 3×$2,000=$6,000 After $6,000 ACTC up to 3×$1,700=$5,100 Proposal 3×$2,500=$7,500 would be $1,500 more than current $6,000.

Common Mistakes

1. Using $2,000 for other dependents: Other dependents age 17+ or qualifying relative only $500, not $2,000. Example 19 year old college dependent = $500 not $2,000.
2. Forgetting phaseout $50 per $1000: Over $200k single $400k joint credit reduces $50 per $1,000 over, not per $100. $20k over = $1,000 reduction not $100.
3. Mixing ACTC $1700 with CTC $2000: ACTC refundable up to $1,700 per child, not $2,000. $2,000 total includes $300 nonrefundable plus $1,700 refundable max per child.
4. Claiming same child by both parents: Only one taxpayer can claim child per year. Tie-breaker custodial parent or Form 8332 release for divorced parents. Both claiming triggers IRS notice.
5. Using AGI vs taxable income: Phaseout uses AGI adjusted gross income, not taxable income. AGI before standard deduction, not after.

Practical Tip

Keep AGI under phaseout threshold if near — $200k single $400k joint — by increasing traditional 401k, HSA, or timing business income to keep full $2,000 per child. Example single AGI $205,000 $5k over threshold 5×$50=$250 reduction per child? Actually reduction $250 total? Wait $5k over = 5×$50=$250 total reduction? Actually $50 per $1,000 over for total credit, so $5k over $250 reduction total $4,000-$250=$3,750. Contributing $5,100 401k drops AGI to $199,900 under $200k threshold full $4,000 saves $250. Claim other dependents $500 even if no CTC — college kids 17-23 may qualify for $500 other dependent credit. File Form 8812 for CTC and ACTC.

Important Limitations

This tool provides estimates for educational purposes only. Not tax, financial, or legal advice. Results depend on inputs you provide. CTC amounts $2,000 per child $500 other $1,700 ACTC refundable, phaseout thresholds $200k single $400k joint and $50 per $1,000 reduction, rules change. Does not include earned income requirements for ACTC, residency, support, tie-breaker, or Form 8332 release. Proposal $2,500 OBBBA not law. Verify with IRS Topic 606, IRS Form 8812 and Publication 501. Inputs are processed in your browser and not sent to a server for this calculator component.

Frequently Asked Questions

How much is child tax credit per child?

Child tax credit is $2,000 per qualifying child under age 17 at end of tax year. Other dependents $500 per dependent. Refundable additional child tax credit ACTC up to $1,700 per child if credit exceeds tax liability.

What is AGI phaseout for child tax credit?

Phaseout starts AGI $200,000 single, head of household, married separate and $400,000 married joint. Credit reduces $50 for each $1,000 over threshold. Example $220k single $20k over = 20 × $50 = $1,000 reduction.

What is refundable ACTC $1700?

ACTC additional child tax credit is refundable portion up to $1,700 per child under 17 if CTC exceeds income tax liability. Allows refund even with $0 income tax after other credits.

What about $2500 OBBBA proposal?

OBBBA proposal suggests $2,500 per child under 17 vs current $2,000. Example 2 kids current $4,000 total, proposal $5,000 total, $1,000 more. Proposal not law, current law $2,000 used for estimate.

Do both parents claim same child?

No. Only one taxpayer can claim child per year. Tie-breaker rules per IRS Publication 501. Divorced parents alternate per agreement or custodial parent claims unless Form 8332 release.

Does this calculator save data?

No. Calculation runs in your browser. Inputs are not sent to a server for this calculator component. Closing tab clears values.