OkTAP withholding registration and Form WTH-10001

If your S corporation pays wages for work done in Oklahoma, you need an Oklahoma withholding account before you run your first payroll. That includes the wages you pay yourself as an owner-employee. This guide covers how to register, what you report each quarter, how often you pay, and how to figure the amount to withhold.

For the bigger picture of Oklahoma payroll, see Oklahoma payroll withholding basics for small employers.

What Oklahoma withholding is

Withholding tax is the amount an employer takes out of employees' wages and pays directly to the state. The employee then gets credit for that amount against the income tax they owe for the year (Oklahoma Tax Commission, Withholding Tax).

The withholding law generally covers everyone paid for services performed in Oklahoma. The exceptions are the services listed in 68 Oklahoma Statutes Section 2385.1 (OTC Packet OW-2). If an employer-employee relationship exists, you must withhold Oklahoma income tax and pay it to the Oklahoma Tax Commission (OTC). That holds no matter what you call the workers or how you pay them.

Step 1: Get your FEIN first

The OTC packet puts the federal step first. You set up your Oklahoma withholding account once you have your Federal Employer Identification Number (FEIN) (OTC Packet OW-2). If you don't have a FEIN yet, get one before you start the state registration. For the IRS steps, check the current IRS instructions.

Step 2: Register your withholding account

Once you have the FEIN, follow these steps:

1. Go to tax.ok.gov and start the online registration for an Oklahoma income tax withholding account.
2. When the form asks, choose a payroll account. The registration offers a choice between a payroll account and a retirement account (OTC Packet OW-2). Payroll is the one for paying wages.
3. Finish the registration. The OTC will give you an account number for each account you register.
4. Write down your account number and keep it with your payroll records. You must use it on every return and every letter to the OTC.
5. Set up an OkTAP account at oktap.tax.ok.gov. The OTC encourages this so you can make payments and file reports online, without paper returns or mailed checks. Using OkTAP also helps you avoid penalties and interest on late payments.

You can look up existing withholding accounts in OkTAP (OTC, Withholding Tax). This is handy if you think the business may already have an account.

Step 3: Collect Form OK-W-4 from each employee

Your withholding math depends on two things from OTC Form OK-W-4: the number of withholding allowances claimed and the marital status (OTC Packet OW-2). Get a completed OK-W-4 from every employee, including yourself.

One detail to watch: if an employee picks "Married, but withhold at higher Single rate" on the OK-W-4, use the Single Persons table for them.

How to figure the withholding

The OTC allows two methods, and both give almost the same result (OTC Packet OW-2):

• Wage bracket tables. You find the gross wage and the number of allowances in the table for your pay frequency and the employee's marital status. The OTC calls this the easier method.
• Percentage formula. You subtract the allowance amount from gross pay and then apply the rate table. This method suits higher-paid employees and software.

If a payment is larger than the last line of a wage bracket table, you must switch to the percentage formula.

2026 withholding allowance amounts

These figures come from the 2026 OW-2 withholding tables:

Worked example (2026 tables)

The OW-2 uses this example: an employee is paid $1,825.00 semi-monthly, is married, and claims two allowances.

1. Allowance amount: $41.67 x 2 = $83.34.
2. Net payment: $1,825.00 - $83.34 = $1,741.66.
3. In Table 3, Column B (semi-monthly, married), the rate for wages of $1,129 and above is $9.10 plus 4.5% of the excess over $1,129.
4. $1,741.66 - $1,129.00 = $612.66. Then $612.66 x 4.5% = $27.57, plus $9.10, for a total of $36.67.
5. Round to the nearest whole dollar: $37.00.

The rounding rule is simple. Drop any amount under 50 cents, and round 50 to 99 cents up to the next dollar. So $2.49 becomes $2.00 and $2.50 becomes $3.00.

How often you pay the OTC

How often you pay depends on how much you withhold. Per the OTC packet:

• Quarterly: pay on or before the 20th day of the month after the quarter ends. This applies unless you withhold more than $500 per quarter.
• Monthly: if you withhold more than $500 per quarter but less than $5,000, pay on or before the 20th of the following month.
• Electronic payment required: if you withheld $5,000 or more per month in the previous fiscal year, you must pay electronically.
• Semi-weekly: if you owed an average of $10,000 or more per month in the previous fiscal year, pay on the same dates as the federal semi-weekly deposit schedule. Employers on the federal semi-weekly schedule also pay Oklahoma withholding at the same time.

The OTC's withholding page also says you pay through the quarter on the same schedule you use for the IRS (OTC, Withholding Tax). If you don't pay by electronic funds transfer, you must send a withholding payment voucher with each payment.

To see how the federal schedules work, read Payroll tax deposit schedules: monthly vs. semiweekly.

The quarterly return and Form WTH-10001

Wage withholding returns are due quarterly (OTC, Withholding Tax). On each return you report three totals for the quarter (OTC Packet OW-2):

• The number of employees you paid
• The total wages you paid
• The total Oklahoma tax you withheld

Selfroll fills in a draft of this quarterly return labeled Form WTH-10001. The OTC excerpts used for this guide don't describe that form line by line. Before you file, check the current OTC instructions and the OkTAP filing screen to confirm the form number, the layout and the due date. File and pay in OkTAP, or use the forms and payment coupons on tax.ok.gov if you have not chosen to file electronically.

Quarterly checklist

• Account number is on the return
• Employee count matches your payroll records for the quarter
• Wage total matches the sum of your pay stubs
• Withholding total matches the payments you sent to the OTC
• Return filed and any balance paid in OkTAP

Year-end W-2 and W-3 filing with the OTC

If you have Oklahoma withholding or wage detail, you must also send W-2 and W-3 information to the OTC. For tax year 2025, the deadline was January 31, 2026 (OTC Packet OW-2). For later years, check the current instructions.

You must use OkTAP to either upload a file or enter the information by hand. Uploaded files follow the EFW2 format (Social Security Administration Publication No. 42-007). The OTC does not accept paper forms you make yourself, flash drives or diskettes. Any such media is returned and treated as not filed.

This is separate from your federal W-2 filing. See How to file W-2s and W-3 through SSA Business Services Online for that part.

Penalties to avoid

The OW-2 lists a penalty of 10% of the tax when you fail to pay withheld tax on time (OTC Packet OW-2). Interest can also apply. For the full rules, check the current instructions. The OTC also publishes a list of common withholding audit issues on its withholding page.

The simplest protection is a calendar with every due date on it. See S-corp payroll calendar: every deadline in the year and Payroll tax penalties and how to avoid them.

Where Selfroll fits

Selfroll is a free payroll calculator. It figures your Oklahoma withholding with the OW-2 tables, keeps your deadlines in a calendar you can export, and fills in a draft Form WTH-10001 for you to review. You still register with the OTC, send the payments and file the returns yourself in OkTAP.

Sources

• Oklahoma Tax Commission: Withholding Tax for Businesses
• Oklahoma Tax Commission: Packet OW-2, 2026 Oklahoma Income Tax Withholding Tables

This guide is general information, not tax or legal advice. Check current IRS, SSA and state rules or ask a CPA.