How to Do Payroll in Oklahoma: A Step-by-Step Guide

Last reviewed: July 2026

Before You Run Your First Payroll

Every new employer in Oklahoma has to clear the same short list of registrations before the first paycheck goes out. Skip one and you can end up with a payroll run you can't legally deposit taxes for, or a new hire report that never reaches the state. The order below is the order that causes the fewest delays: federal ID first, then the two state accounts, then the operational decisions like pay frequency and software.

None of this is unique to Oklahoma in structure. What differs from state to state is which agency handles which piece, how fast registration turns around, and what the local pay-frequency and final-pay rules require. Oklahoma's version is comparatively simple: one tax agency, one unemployment agency, and a pay-frequency rule that most small businesses already follow by default.

Step 1: Get a Federal EIN

Your Employer Identification Number is the account number the IRS, the Oklahoma Tax Commission, and your bank will all ask for. Apply directly through the IRS EIN application. It's free, takes a few minutes, and you get the number immediately if you apply online during business hours. Don't pay a third-party site for something the IRS gives away for nothing.

Step 2: Register With Oklahoma State Agencies

Oklahoma splits employer registration between two agencies, and you need accounts with both before your first payroll:

• The Oklahoma Tax Commission (OTC) issues your withholding account number through its online OkTAP portal. Registering online typically returns your account number and deposit schedule within about five business days.
• The Oklahoma Employment Security Commission (OESC) issues your SUI account number and your initial unemployment insurance rate.

Register as soon as you know a hire date is coming, not the week payroll is due. State processing windows are short but not instant, and you cannot legally deposit state withholding or SUI without an assigned account number.

Step 3: Set Up State Withholding

Have every employee complete Form OK-W-4, Oklahoma's state withholding certificate, alongside their federal W-4. If an employee doesn't turn one in, withhold at the single rate with zero allowances until they do. The Oklahoma Tax Commission publishes updated withholding tables each year, so pull the current version rather than reusing last year's numbers in a spreadsheet.

Oklahoma taxes wages using graduated brackets, and the top rate applies at a fairly low income threshold, so most full-time employees land in the top bracket for a portion of their pay. Your payroll software or the OTC's published tables will handle the bracket math; your job is making sure the OK-W-4 on file is current.

Step 4: Register for SUI

State unemployment insurance is an employer-only cost in Oklahoma — employees don't contribute. New employers pay 1.5% on the first $25,000 of each employee's wages in 2026. After your first year or two, OESC assigns an experience rate based on your claims history, which can move the rate up or down from the new-employer figure.

Report every new hire and rehire to OESC within 20 days of their start date. This feeds the state and federal new hire directories used for child support enforcement, and missing the deadline can draw a compliance letter even if your tax filings are otherwise clean.

Step 5: Choose a Pay Frequency and Learn Final Pay Rules

Oklahoma requires wages to be paid at least twice per calendar month. State law limits the gap between the end of a pay period and the payday to 11 days, with three additional days allowed for the employer to actually process payment. Weekly and biweekly schedules both satisfy this without extra planning; a strict monthly schedule does not.

When someone leaves your company, Oklahoma doesn't require a same-day or next-day final check. Final wages are due by the next regular payday, whether the separation was voluntary or not. If your paid-time-off policy treats accrued vacation as a vested benefit, include it in that final payment unless your written policy clearly says otherwise and employees were told in advance.

Step 6: Follow the Deposit and Filing Calendar

Your state withholding deposit frequency is assigned by the Oklahoma Tax Commission based on how much you withhold annually, and it ranges from quarterly for the smallest employers up to a few days after each payroll for larger ones. SUI is reported and paid quarterly, with returns due the month after each quarter closes.

Federal deposits run on their own schedule tied to your total tax liability, and federal Form 941 is due quarterly regardless of your state deposit frequency. If you've never filed a 941, our Form 941 guide walks through the mechanics separately from anything state-specific.

Step 7: Handle Year-End W-2 Filing

W-2s covering Oklahoma wages are due to the Oklahoma Tax Commission by January 31, matching the federal deadline. Employers filing 250 or more W-2s must submit electronically rather than on paper. Reconcile your final payroll register against your quarterly filings before you generate W-2s — catching a mismatch in January is far less painful than amending forms in March.

Choosing Payroll Software

You can run Oklahoma payroll by hand for a single employee, but most owners reach a point where the state withholding tables, SUI deposits, and W-2 filing add up to more administrative time than the payroll itself is worth. Gusto calculates and files Oklahoma state withholding and SUI automatically, handles new hire reporting, and generates W-2s at year-end, so the registration work above becomes a one-time setup rather than a recurring task.

Whatever you choose, confirm the software supports Oklahoma's specific withholding tables and SUI wage base before you commit. Generic payroll tools sometimes lag on state-specific updates, and an outdated wage base will quietly overcharge or undercharge your SUI liability all year.

Frequently Asked Questions

Do I need to register with the state before my first payroll run?

Yes. You need an active Oklahoma Tax Commission withholding account and an OESC unemployment insurance account before you issue your first paycheck. Both can take several business days to process, so start as soon as you have a hire date.

How often do I have to pay employees in Oklahoma?

At least twice per calendar month. Oklahoma law caps the gap between the end of a pay period and payday at 11 days, plus 3 extra days for the employer to process payment. Weekly and biweekly schedules also satisfy the rule.

What is Oklahoma's new employer SUI rate?

New Oklahoma employers pay 1.5% on the first $25,000 of each employee's wages in 2026. OESC assigns an experience rate in later years based on your claims history.

When are Oklahoma W-2s due?

Oklahoma W-2s are due to the Oklahoma Tax Commission by January 31, the same deadline the IRS uses for federal copies. Employers filing 250 or more W-2s must submit electronically.

Want to see the actual take-home numbers before you run a check? Use the paycheck calculator to model gross-to-net pay, or the W-4 helper if an employee needs help filling out their federal form alongside the OK-W-4.