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SESK: Stuff Everyone Should Know · sesk.info/founder-keep-w4-four-years

After an employee signs Form W-4, what does the employer do with it?

Keep it in their records for at least 4 years, unless the IRS specifically directs otherwise.

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  1. Keep it on file for at least 4 years ✔
  2. Mail it to the IRS within 10 days
  3. Give it back to the employee to keep

Why: The IRS says employers keep each signed W-4 for at least 4 years and have it ready for inspection. The IRS may direct an employer to send certain Forms W-4.

Huh, didn't know that: The IRS can send a 'lock-in letter' telling an employer to ignore a W-4 that withholds too little.

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References

Answer: Keep it on file for at least 4 years. The IRS says employers keep each signed W-4 for at least 4 years and have it ready for inspection. The IRS may direct an employer to send certain Forms W-4.

  1. IRS Topic no. 753, Form W-4, Employee's Withholding Certificate www.irs.gov/taxtopics/tc753
    you must keep it in your records for at least 4 years
    Checked 2026-10-11.

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