Schedule 8812 (Form 1040) For Tax Year 2023: IRS-Accurate Checklist
Why 2023 Form 8812 Is Unique
For tax year 2023, the maximum Additional Child Tax Credit increased to $1,600 per qualifying child—the highest amount since TCJA enactment. Modified AGI thresholds remain permanent at $400,000 (married filing jointly) and $200,000 (all other filing statuses). Unlike prior years, the 2023 form requires explicit SSN validity verification issued before the return due date, with no exception for amended returns.
2023 Year-Specific Programs Applying to This Form
The 2021 ARPA full refundability rule does not apply to 2023; the Additional Child Tax Credit reverts to its standard earned-income-based calculation. Form 2555 (Foreign Earned Income Exclusion) filers are permanently prohibited from claiming the Additional Child Tax Credit. Bona fide Puerto Rico residents follow Part II-B special calculations on line 21 (Social Security and Medicare withholding amounts).
Ten-Step Checklist for Schedule 8812 (2023)
Step 1: Verify Taxpayer and Spouse SSN Validity
Confirm that you (and your spouse, if filing jointly) hold a Social Security Number or ITIN valid for employment, issued on or before the 2023 return due date, including extensions. If not, you cannot claim the Child Tax Credit, Credit for Other Dependents, or Additional Child Tax Credit.
Step 2: Confirm Each Qualifying Child Meets Seven Required Tests
Each qualifying child must be under age 17 at the end of 2023, your son, daughter, stepchild, adopted child, brother, sister, stepbrother, stepsister, half-brother, half-sister, or a descendant of any of these; have lived with you for more than half of 2023; be claimed as your dependent on this return; not provide more than half of their own support; not file a joint return (with limited exception); have a valid SSN issued before return due date; and be a U.S. citizen, national, or resident alien.
Step 3: Gather Required Documentation
Collect Form(s) W-2, Form(s) 1099, Schedule(s) K-1 (if applicable), proof of child’s SSN, birth certificate or adoption documentation, and proof of residency for each qualifying child or dependent. If claiming nontaxable combat pay, obtain Form W-2 box 12 documentation with code Q.
Step 4: Calculate Modified Adjusted Gross Income on Line 3
Enter AGI from Form 1040 line 11, then add Puerto Rico excluded income (line 2a if applicable), foreign earned income from Form 2555 lines 45 and 50 (line 2b if applicable), and Form 4563 line 15 (line 2c if applicable). Total on line 3 determines income phase-out eligibility.
Step 5: Complete Part I—Child Tax Credit Calculation (Lines 1–14)
On line 4, enter the number of qualifying children under age 17 with required SSN and multiply by $2,000. On line 6, enter the number of other dependents (including qualifying children age 17 or lacking SSN) and multiply by $500. Complete Credit Limit Worksheet A to determine the applicable credit cap on line 13.
Step 6: Verify Income Phase-Out Thresholds (Lines 9–11)
If modified AGI (line 3) exceeds $400,000 (married filing jointly) or $200,000 (all other filing statuses), calculate phase-out reduction: multiply the excess income by 5% (0.05) and round up to the nearest $1,000 (or zero if the result is $0 or less). If phase-out reduces your credit to zero, stop; you cannot claim any of these credits.
Step 7: Determine Part II-A Eligibility—Additional Child Tax Credit (Lines 15–20)
Check line 15 only if declining the Additional Child Tax Credit. Otherwise, if line 12 (computed credit) exceeds line 14 (allowable credit), proceed. On line 16b, multiply the number of qualifying children under 17 by $1,600. On line 18a, enter earned income from wages, self-employment, and nontaxable combat pay (line 18b). If earned income exceeds $2,500, subtract $2,500 and multiply the result by 15% (0.15) on line 20.
Step 8: Check Part II-B Requirement (Filers with Three or More Qualifying Children or Puerto Rico Residents)
If line 16b equals or exceeds $4,800 AND line 20 is less than line 17, AND you have three or more qualifying children or are a bona fide Puerto Rico resident, complete Part II-B. On line 21, enter withheld Social Security, Medicare, and Additional Medicare taxes from Form(s) W-2 boxes 4 and 6. On line 22, enter the total of Schedule 1 line 15, Schedule 2 lines 5, 6, and 13. Add lines 21 and 22; compare to tax liability (line 24) to determine final ACTC on line 27.
Step 9: Complete Form 8862 if Prior Claim Denied
If your Child Tax Credit, Additional Child Tax Credit, or Credit for Other Dependents was denied or reduced in any year after 2015 for any reason other than a math or clerical error, you must attach Form 8862 (Information to Claim Certain Credits After Disallowance) to claim the credit again in 2023.
Step 10: Attach Schedule 8812 and File
Attach the completed Schedule 8812 to Form 1040, Form 1040-SR, or Form 1040-NR. Sign and date the return. Nonresidents filing Form 1040-NR may claim the Child Tax Credit, Additional Child Tax Credit, and Credit for Other Dependents only if they are residents of Canada, Mexico, India, or South Korea, or if they meet limited exceptions. See the IRS Where to File page for 2023 Form 8812 mailing or filing instructions.
Line Changes for 2023 Schedule 8812
Line 16b: Prior instruction: Maximum ACTC was $1,500 per qualifying child for 2022. The 2023 instruction: The Maximum ACTC increased to $1,600 per qualifying child for 2023. Change type: Updated.
Part II-B, Line 21: Prior instruction: The Combined Social Security and Medicare withholding calculation existed, but with a different emphasis. The 2023 instruction: Explicit requirement to include Additional Medicare Tax and tier 1 RRTA taxes; bona fide Puerto Rico resident rules clarified with separate worksheet reference. Change type: Clarified.
Critical Limitations for 2023 Form 8812
Nonresident Aliens: Form 1040-NR filers may claim the Child Tax Credit, Additional Child Tax Credit, and Credit for Other Dependents only if they reside in Canada, Mexico, India, South Korea, or meet a limited exception for spouses of U.S. citizens. All other nonresident aliens are prohibited.
Foreign Earned Income Exclusion: If you file Form 2555 to exclude foreign earned income, you cannot claim the Additional Child Tax Credit on Part II-A of Schedule 8812.
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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.
