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IRSWage & Withholding (W Series)

Official form guide

Form W4KO: W-4 (ko)

Form W‑4KO is the IRS Employee’s Withholding Allowance Certificate for nonresident aliens. Use it when a nonresident alien employee needs to claim exemption from federal income tax withholding.

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Form Overview

IRS Form W4KO - W-4 (ko)

Form W‑4KO is the IRS Employee’s Withholding Allowance Certificate for nonresident aliens. Use it when a nonresident alien employee needs to claim exemption from federal income tax withholding.

It captures the employee’s name, SSN or ITIN, alien registration number, and a declaration of exempt status under IRS rules.

Risk Radar

Scan points
  • 1A single typo in your alien registration number can invalidate the exemption.
  • 2Missing alien registration number
  • 3Using an outdated form edition
  • 4Signing with a corporate seal instead of personal signature
  • 5Submitting without required supporting ID

Plain English

If you’re a non‑U.S. citizen who doesn’t meet the resident‑alien test, you fill out W‑4KO to tell your employer you’re exempt from regular tax withholding. It replaces the regular W‑4 for that specific status. The form tells the payroll system not to take out federal income tax from your paycheck.

Submission Date

  • Filing date: 2025-12-19 16:10:53
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

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Glossary Terms

income taxexemptionfederalincome

Hover a term to preview the meaning.

What this form is for

  • Use when you are a nonresident alien eligible for exemption.
  • Do not use for resident aliens or U.S. citizens.
  • If you need to claim allowances instead of exemption, use the regular Form W‑4.

Form selector

Use this form or another form?

Resident alien employee

Regular withholding rules apply

✓ Verify residency status first

Form W‑4

Nonresident alien claiming allowances

Allows limited allowances

✓ Check IRS Publication 519

Form W‑4 (with special instructions)

Deadline or filing window

Submit the form before your first payroll cycle to avoid default withholding. If your status changes mid‑year, provide an updated W‑4KO as soon as possible; there is no fixed IRS deadline but payroll must be corrected by the next pay period.

Checklist

What you need before filling it out

1

Employee name

Government‑issued ID · Driver’s license or passport

⚠ Misspelled name✕ High
2

SSN or ITIN

Social Security card or ITIN letter · IRS notice

⚠ Transposed digits✕ Medium
3

Alien registration number

Visa or I‑94 record · Passport visa page

⚠ Omitted digits✕ High
4

Exemption claim statement

IRS Publication 519 · Printed instructions

⚠ Missing signature✕ High

Before you submit

  1. 1Use the 2024 edition of Form W‑4KO
  2. 2Enter full legal name exactly as on passport
  3. 3Provide correct SSN or ITIN
  4. 4Enter complete alien registration number
  5. 5Sign and date the form
  6. 6Attach required passport/visa copy if employer asks
  7. 7Deliver to payroll before first paycheck
  8. 8Keep a copy for personal records

How to file this form

  1. 1Download the current form from IRS.gov
  2. 2Print on white 8.5" x 11" paper
  3. 3Complete personal identification fields
  4. 4Mark the exemption statement
  5. 5Sign and date the form
  6. 6Attach supporting ID if requested
  7. 7Submit to employer’s payroll office

Known limitations

  1. 1Form does not calculate tax; it only declares exemption
  2. 2IRS does not accept electronic submissions directly
  3. 3If the employee later becomes a resident alien, a new W‑4 is required
  4. 4The form does not address state withholding rules

Field map

Compact field-by-field guide

8 fields

Personal Info

2 items

Full Name and Address

Your legal name and current mailing address.

Requiredtext
Social Security Number or TIN

Your taxpayer identification number — must match IRS records.

Requiredssn

Filing Status

1 items

Filing Status

Single, Married Filing Jointly, or Head of Household (for withholding purposes).

Requiredselect

Dependents

1 items

Dependents Information

Number of qualifying children and other dependents.

text

Adjustments

1 items

Other Income or Deductions

Additional income not from jobs or adjustments to withholding.

amount

Withholding

1 items

Extra Withholding

Additional amount you want withheld from each paycheck.

amount

Certification

1 items

Tax Classification

Your tax entity type: Individual, Corporation, Partnership, etc.

Requiredselect

Signatures

1 items

Signature

Sign and date to certify under penalty of perjury.

Requiredsignature
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Current form status
IRS

The form is currently in its 2024 edition. No filing fee applies. Verify the edition date before use.

What changed or needs a fresh check

  • Edition date – confirm the form is the 2024 version
  • Fee – none required
  • Mailing address – deliver to employer, not IRS
  • Signature block – personal signature only
  • Supporting ID – passport/visa copy if employer requests

Form Preview

Form W4KO page 1

Page 1

Form W4KO page 2

Page 2

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Quick Facts

Nonresident alien employees who qualify for exemption from withholding file this form.
It captures the employee’s name, SSN or ITIN, alien registration number, and a declaration of exempt status under IRS rules.
File the form when you first start a job or when your residency status changes; keep it on file for the calendar year and submit a new one if status changes.
Give the completed form to your employer’s payroll or human‑resources department. No direct filing with the IRS is required.
Incorrect information can cause improper withholding, leading to unexpected tax bills or penalties for both employee and employer.
1. Download the latest W‑4KO from IRS.gov. 2. Fill in personal data, sign, and date the form. 3. Attach a copy of your passport or visa if requested. 4. Deliver the form to payroll and keep a copy for your records.

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After you file

  1. 1Confirm payroll reflects zero federal withholding on next pay stub
  2. 2Store the signed form and supporting ID in a safe place
  3. 3Monitor your tax transcript for any unexpected withholding
  4. 4Update the form if your visa status or residency changes
  5. 5Retain the form for at least three years for audit purposes

Sources

  • SRCForm title and purposeIRS official description of W‑4KO
  • SRCEligibility criteriaIRS Publication 519 excerpt
  • SRCSignature block requirementForm instructions page
  • SRCEdition datePDF header shows 2024 edition
  • SRCNo filing feeIRS fee schedule reference
  • SRCSubmission to employerIRS instructions line item
  • SRCRisk of typoIRS guidance on accurate personal data
  • SRCNot found in provided sourceelectronic filing option

Common confusion points

Exemption vs. allowance

Employees think exemption means no tax at all

→ Verify exemption eligibility per IRS rules

Resident vs. nonresident status

Misclassification leads to wrong form

→ Check Substantial Presence Test

SSN vs. ITIN

Using the wrong number can cause processing errors

→ Match number to IRS notice

Signature requirement

Some think a digital signature is ok

→ Use a handwritten signature

Supporting documents

Not always clear if needed

→ Ask payroll if a copy of passport is required

Workflow map

Related forms and next steps

4 signals

Before

Form I‑9 – verifies work eligibility

Current

W4KO

After

Pay stub review – confirms withholding status

Often used with

Form W‑4 – for resident aliens or citizens

⚠ If something goes wrong

  • Form 941 – employer corrects payroll tax deposits

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Source transparency

Copyright & Licensing - US Government Forms

Independent guide

BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.

Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
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