Oklahoma Tax Commission Edition Form OK-W-4, Revised 3-2021 1 page Oklahoma

Form OK-W-4 — Oklahoma Employee's State Withholding Allowance Certificate

The Oklahoma Tax Commission form that tells your employer how much Oklahoma income tax to withhold from your pay.

Fill out Form OK-W-4 online View the form Free on every FileIt plan
Form OK-W-4 · Employee's State Withholding Allowance Certificate (Oklahoma)
The official Oklahoma Tax Commission form, edition Form OK-W-4, Revised 3-2021 — blank
Page 1 of 1
Form OK-W-4 (2021) Employee's State Withholding Allowance Certificate (Oklahoma) — page 1 of 1
Page 1 of 1
Fill this form online Blank PDF from Oklahoma Tax Commission

What is Form OK-W-4?

Form OK-W-4, the Employee's State Withholding Allowance Certificate, is how you tell your employer how much Oklahoma income tax to take out of each paycheck. It is a one-page form from the Oklahoma Tax Commission, and the current edition is Revised 3-2021.

The form asks for your filing status, a count of allowances (one for yourself, one for a spouse who doesn't work, one per dependent, plus any additional allowances), an optional extra amount per pay period, and three ways to claim exempt status. It is for withholding only, and the form itself says not to mail it to the Oklahoma Tax Commission — you give it to your employer.

FileIt lets you fill out the OK-W-4 online in a guided form. It pre-fills your name from the People records in your vault, works out the spouse allowance and the total on line 5, writes "Exempt" on the right line for you, and prints everything into the Oklahoma Tax Commission's own PDF. The finished form is saved in your vault and can be sent for e-signature. FileIt never submits anything to your employer or the Tax Commission.

Who fills it
The employee.
Given to
Your employer. The form says do NOT mail it to the Oklahoma Tax Commission.
When
When you start a job with Oklahoma withholding, or when your allowances or exempt status change.
Signatures
The employee signs and dates it under penalties of perjury. It isn't valid unless signed.
Edition
Form OK-W-4, Revised 3-2021.
Cost
Free to fill out on any FileIt account.

Who needs to fill out Form OK-W-4?

  • Employees whose employer withholds Oklahoma income tax from their wages.
  • Married employees who want to decide between the Married rate and the higher Single rate.
  • Anyone with dependents, itemized deductions or other Oklahoma credits who wants less withheld.
  • People with a second job or other income who want more withheld each pay period.
  • Employees with no Oklahoma tax liability, military spouses covered by the Military Spouses Residency Relief Act, and active-duty service members eligible for Oklahoma's military income deduction, who want to claim exempt status.

When to use Form OK-W-4

  • When you start a new job, alongside the federal Form W-4 and Form I-9.
  • After you marry, your spouse starts or stops working, or you gain or lose a dependent.
  • When you take a second job — the form suggests claiming a smaller number or no allowances with employers other than your main one.
  • When you qualify for, or no longer qualify for, one of the exempt statuses on lines 7 to 9.

What you need before you start

  • Your name, Social Security number and home address.
  • Your filing status, and whether your spouse works if you're married.
  • The number of dependents you'll claim on your Oklahoma return — only one spouse should claim them.
  • Any additional allowances for itemized deductions or other Oklahoma deductions or credits.
  • If you expect to owe tax, your expected balance due and the number of pay periods in the year, to work out line 6.
  • If you're a military spouse claiming exempt status, Form OW-9-MSE, which the form says you must also provide.

What’s on Form OK-W-4

The 2021 edition has 1 page. FileIt asks for it in 4 parts, and it is signed by Employee:

  1. Your name, SSN, address and filing statusEmployee
  2. Lines 1–6: Allowances and additional withholdingEmployee
  3. Lines 7–9: Exempt statusEmployee
  4. Sign hereEmployee

How to fill out Form OK-W-4, step by step

1 Name, SSN, address and filing status

Enter your first name and middle initial, last name, Social Security number and home address. Then choose Single, Married, or Married, but withhold at higher Single rate.

2 Lines 1 and 2: You and your spouse

Line 1 is the allowance for yourself — the form says enter 1. Line 2 depends on whether your spouse works: if yes, enter 0; if no, enter 1 for your spouse. FileIt fills line 2 from your answer. If your filing status is married filing joint and your spouse works, the form's notes say not to claim an exemption for your spouse.

3 Lines 3 and 4: Dependents and additional allowances

Line 3 is the number of dependents you'll claim on your tax return, leaving out yourself, your spouse and any dependents your spouse already claimed on their own OK-W-4. Line 4 is for extra allowances if you itemize deductions or have other Oklahoma deductions or credits that lower your tax.

4 Line 5: Total allowances

Add lines 1 through 4. FileIt does the addition for you.

5 Line 6: Additional withholding

If you expect a balance due on your return (for example from interest, dividends or a part-time job), divide the expected balance by the number of pay periods in the year and enter the result as an extra amount to withhold each pay period.

6 Lines 7 to 9: Exempt status

Line 7 is for people who had a right to a refund of all Oklahoma tax withheld last year because they had no tax liability, and expect the same this year. Line 8 is for those who meet the Servicemember Civil Relief Act conditions as amended by the Military Spouses Residency Relief Act and have no Oklahoma tax liability — they must also complete Form OW-9-MSE. Line 9 is for income earned as a member of an active duty component of the Armed Forces that is eligible for the military income deduction. Tick the one that applies and FileIt writes "Exempt" on that line.

7 Sign and date

Sign and date the form (MM/DD/YYYY). You certify under penalties of perjury that you're entitled to the allowances or exempt status claimed. The form isn't valid unless you sign it.

Common mistakes to avoid

  • Mailing the form to the Oklahoma Tax Commission — the form says not to. Give it to your employer.
  • Both spouses claiming the same dependents, which the form warns can leave you owing Oklahoma tax.
  • Claiming the spouse allowance on line 2 when your spouse works.
  • Claiming full allowances with every employer when you have more than one job.
  • Claiming military-spouse exemption on line 8 without also providing Form OW-9-MSE.
  • Forgetting to sign — the form isn't valid without your signature.

After you fill it out

Sign and date the form and give it to your employer's payroll or HR team. Don't send it to the Oklahoma Tax Commission.

FileIt saves the finished PDF in your vault folder, so you have a record of the allowances or exempt status you claimed.

Check your next pay stubs, and fill out a new OK-W-4 when your family, jobs or income change.

Fill out Form OK-W-4 online with FileIt

  1. Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
  2. Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 20 fields in all. Your answers save as you go.
  3. Check the live preview. Watch your answers land on the real Oklahoma Tax Commission form, and let FileIt do any worksheet arithmetic.
  4. Generate the official PDF. FileIt prints your answers into the agency’s own PDF and files it in that person’s folder in your vault. Sign it, or send it for e-signature.

FileIt fills the form — it never files or submits anything for you. Deliver the finished form to whoever asked for it, the way the form’s instructions say.

Start Form OK-W-4 now — it’s free

Form OK-W-4: frequently asked questions

What is Form OK-W-4?

It is Oklahoma's Employee's State Withholding Allowance Certificate from the Oklahoma Tax Commission. It tells your employer how much Oklahoma income tax to withhold, based on your filing status, allowances, any additional amount, or exempt status.

Is the 3-2021 OK-W-4 still current?

Yes. The Oklahoma Tax Commission's website still publishes Form OK-W-4 Revised 3-2021 as its current employee withholding certificate.

Do I send the OK-W-4 to the Oklahoma Tax Commission?

No. The form says do NOT mail it to the Oklahoma Tax Commission. You give it to your employer.

How many allowances should I claim on the OK-W-4?

One for yourself, one for your spouse if your spouse doesn't work, one for each dependent you'll claim, plus any additional allowances for itemized deductions or other Oklahoma credits. With more than one job, claim fewer or none at the other jobs.

When can I write Exempt on the OK-W-4?

Line 7 if you had no Oklahoma tax liability last year and expect none this year; line 8 if you're a military spouse meeting the Military Spouses Residency Relief Act conditions with no Oklahoma tax liability (with Form OW-9-MSE); line 9 if your active-duty military income is eligible for the military income deduction.

Can I fill out the OK-W-4 online?

Yes. FileIt walks you through the form, does the line 2 and line 5 arithmetic, and prints your answers into the official Oklahoma PDF. The finished form is saved in your vault and can be sent for e-signature; you give it to your employer yourself.

Official sources

FileIt is not affiliated with or endorsed by Oklahoma Tax Commission or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-09-28.

Fill out Form OK-W-4 online