IRS Form 8812 (2024) Paper-Filing Checklist
Year-Specific Attribute Summary
The 2024 Schedule 8812 implements a permanent TCJA framework with an increased refundable ACTC ($1,700 per child, up $100 from 2023). It enforces mandatory SSN validation for all claimants before the return due date, restricting nonresident aliens to resident-country status and residents of Canada and Mexico only.
Nonresident aliens from countries other than Canada, Mexico, and South Korea generally cannot claim the Child Tax Credit or Additional Child Tax Credit; limited exceptions apply for students under the U.S.-India Income Tax Treaty. The 2024 form requires completion of Credit Limit Worksheet A for all filers; Worksheet B applies only if claiming mortgage interest, adoption, residential clean energy, or D.C. first-time homebuyer credits while claiming at least one qualifying child.
Ten-Step Compliance Checklist for 2024 Form 8812
Step 1: Verify Qualifying Child Age and SSN Requirement
Each qualifying child must be under the age of 17 on December 31, 2024, and have a valid Social Security Number issued for employment on or before the tax return due date (including any extensions). If a child was born and died in 2024, attach a copy of the birth certificate, death certificate, or hospital records showing the child was born alive.
Step 2: Confirm Taxpayer SSN Eligibility
You (or your spouse if filing jointly) must have a valid Social Security Number or ITIN issued on or before the return due date. Gather your Form 1040, 1040-SR, or 1040-NR through line 15 before proceeding with Form 8812 completion.
Step 3: Gather W-2 and Income Documentation
Collect all Form W-2 boxes (lines 1, 4, 6 for earned income and withholding); Schedule C or Schedule F if self-employed; and Schedule K-1 if applicable. For ACTC calculation, earned income must exceed $2,500 for 2024; document all nontaxable combat pay separately on line 18b if applicable.
Step 4: Determine Modified AGI and Phaseout Status
Calculate modified AGI from Form 1040 line 11, adjusted for excluded Puerto Rico income and Form 2555/4563 amounts (lines 2a–2c). If modified AGI exceeds $200,000 (single, head of household, married filing separately, qualifying widow(er)) or $400,000 (married filing jointly), the $2,000 per-child credit phases out at 5% per $1,000 above threshold; round up to the next $1,000 multiple.
Step 5: Complete Part I (Lines 1–14)
Enter modified AGI (line 3), number of qualifying children under 17 with required SSN (line 4, multiply by $2,000 for line 5), and number of other dependents who are U.S. citizens/nationals/resident aliens (line 6, multiply by $500 for line 7). Do not include yourself, spouse, or non-qualifying persons on line 6. The credit reduces by $50 for each $1,000 (or fraction thereof) of modified AGI above the applicable threshold from the tentative credit.
Step 6: Complete Credit Limit Worksheet A
Required for all filers. Begin with Form 1040 line 18 (total tax before credits); add back specific credits from Schedule 3 (lines 1, 2, 3, 4, 5b, 6d, 6f, 6l, 6m). Subtract total additions from line 18 to determine available tax liability for the child tax credit. Enter the result on line 13 of Schedule 8812.
Step 7: Determine if Credit Limit Worksheet B Applies
Complete Worksheet B ONLY if claiming mortgage interest credit (Form 8396), adoption credit (Form 8839), residential clean energy credit (Form 5695, Part I), or D.C. first-time homebuyer credit (Form 8859) AND line 4 of Schedule 8812 is greater than zero AND not filing Form 2555. Worksheet B uses a per-child ACTC amount of $1,700 for the 2024 tax year.
Step 8: Calculate Additional Child Tax Credit (ACTC), Part II-A
Do NOT complete if filing Form 2555 (foreign earned income exclusion). Line 18a: Enter earned income from Form 1040 or 1040-SR (do not include Puerto Rico exclusions or Form 2555 amounts). Line 19: Subtract $2,500 earned income threshold. Line 20: Multiply result by 15% (0.15). Line 16b: Multiply the number of qualifying children under 17 by $1,700. ACTC cannot exceed the smaller of line 17 (tentative ACTC) or line 20 (15% of earned income over $2,500).
Step 9: Complete Part II-B if Three or More Qualifying Children
If three or more qualifying children and line 16b of Schedule 8812 is $5,100 or more, include withheld social security and Medicare taxes (Form W-2 boxes 4 and 6) on line 21. Add line 21 to the specific Schedule 1 and Schedule 2 amounts (line 22). Compare the results to determine if the ACTC may be increased under an alternative calculation using payroll taxes. If a bona fide Puerto Rico resident, a similar calculation applies using Puerto Rico Form 499R-2/W-2PR.
Step 10: Attach Supporting Documentation and File
Complete Schedule 8812 and attach to Form 1040, 1040-SR, or 1040-NR. Check the “Child tax credit” box in column (4) of the dependents section for each qualifying child claiming $2,000 credit. Check the “Credit for other dependents” box for each dependent claiming $500. Do not check both boxes for the same person. Sign and date the Form 1040. If your CTC, ACTC, or ODC was denied or reduced in any year after 2015 for any reason other than math/clerical error, attach Form 8862. See the IRS Where to File page for the 2024 paper-filing address.
Form-Specific Limitations
Nonresident Alien Restriction
Schedule 8812 child tax credit, additional child tax credit, and credit for other dependents are available only to nonresident aliens who are residents of Canada, Mexico, or South Korea, or to students/apprentices from India under Article 21(2) of the U.S.-India Income Tax Treaty. All other nonresident aliens are ineligible to claim these credits, regardless of their child's qualifying status.
Form 2555 Prohibition on ACTC
If Form 2555 (foreign earned income exclusion) is filed, the Additional Child Tax Credit (Part II-A and Part II-B of Schedule 8812) cannot be claimed. The nonrefundable $2,000 Child Tax Credit may still be claimed to reduce tax liability if income thresholds are met.
Line/Section Changes for 2024
Line 16b: Additional Child Tax Credit Per-Child Amount
Wording prior year (implicit): The ACTC per-child multiplier was $1,600 or another lower amount in years before 2024. Wording current year: Line 16b of Schedule 8812 for 2024 specifies multiplying the number of qualifying children under age 17 by $1,700 (not $1,600). Change type: Updated (amount increased).
Line 18a: Earned Income Threshold for ACTC
Wording prior year (implicit): Prior years may have used different earned income thresholds. Wording current year: For 2024, line 18a requires earned income to exceed $2,500 to claim any refundable ACTC under line 20 calculation (15% of earned income over $2,500). Change type: Clarified (threshold remains $2,500 for 2024; subject to change in future years).
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This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance.
