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Ordinary Social Security withholding is not federal income tax withholding
Your W-2 reports different kinds of tax withholding separately. Box 4 is Social Security tax withheld; box 2 is federal income tax withheld. Do not add the box 4 amount to federal income tax withholding on your Form 1040. The Form 1040 line 11 claim is only for excess withholding that qualifies under the rules for that tax year. See the IRS 2025 Instructions for Form 1040 and its Instructions for Forms W-2 and W-3.
When excess withholding can go on the 2025 Form 1040
You had more than one employer
For tax year 2025, the Social Security wage threshold in the IRS instructions is $176,100, and the maximum employee Social Security withholding cited there is $10,918.20. If multiple employers withheld Social Security tax from your wages and your total withholding exceeds that maximum, the instructions say you can claim the excess on Form 1040 line 11. The amount potentially credited is the qualifying withholding above $10,918.20; apply the 2025 instructions to your specific wages and W-2s. The IRS states: “You can take a credit on this line for the amount withheld in excess of $10,918.20.” These are 2025 figures only; do not use them for a different tax year without checking that year’s instructions.
One employer withheld too much
If a single employer withheld more than the applicable maximum, do not treat that as the multiple-employer line 11 credit. Ask the employer to correct the withholding and refund or adjust the excess. If the employer does not resolve it, IRS guidance describes filing Form 843, Claim for Refund and Request for Abatement. Review IRS Topic No. 608 and the relevant Form 1040 and Form 843 instructions for the applicable tax year.
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How to report a qualifying 2025 excess amount
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Collect each W-2 for 2025. Locate Social Security tax withheld in box 4 and identify the wages and withholding for each employer. Do not confuse box 4 with box 2, which is federal income tax withheld.
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Check how many employers withheld tax for you. The multiple-employer claim applies to withholding across more than one employer for the same taxpayer. Use the 2025 Form 1040 instructions to determine whether the wage and withholding rules are met.
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Enter eligible excess on Form 1040 line 11 for 2025. Follow the instructions and the actual 2025 form layout. Do not transfer the entire box 4 amount to this line.
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For a single-employer overwithholding, contact the employer. Request a correction first; if it is not made, consult IRS Form 843 guidance rather than claiming the multiple-employer line 11 credit.
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Special cases: joint returns and railroad retirement tax
Married filing jointly
Calculate each spouse’s Social Security wages and withholding separately. Do not pool spouses’ wages or withholding to determine whether either spouse has excess withholding. Apply the relevant year’s instructions to each spouse’s own W-2s.
Tier 1 and Tier 2 RRTA
The 2025 Form 1040 line 11 is titled “Excess Social Security and Tier 1 RRTA Tax Withheld,” so qualifying Tier 1 RRTA excess is handled under that line’s instructions. Excess Tier 2 RRTA tax has a separate Form 843 route; it is not the same claim as excess Social Security or Tier 1 RRTA withholding. Check IRS Topic No. 608 for the applicable treatment.
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Use the instructions for the return year you are filing
This guidance concerns U.S. federal Form 1040 reporting for tax year 2025. The IRS updated the 2025 Form 1040 instructions on March 11, 2026. If you are filing a different year, confirm that year’s line number, wage base, maximum withholding, and remedy in the official Form 1040 instructions. This does not determine state tax treatment or whether a particular taxpayer qualifies.
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