How to Fill Out and File Oklahoma Form 501: OkTAP and Penalties

Oklahoma Form 501 is the Annual Information Return that payors and pass-through entities file with the Oklahoma Tax Commission to report certain payments made during the calendar year, along with any Oklahoma tax withheld from those payments. It is not a payment voucher. The form itself carries the instruction, “Do not remit payment with this form.”¹ Filing happens electronically through the Oklahoma Taxpayer Access Point (OkTAP); paper returns are no longer accepted.²

Who Has to File

Three groups file Form 501, and the group you fall into determines what supporting forms you attach.

Payors reporting income to individuals. Any person or organization, including churches, charities, labor unions, school districts, cooperatives, and government agencies, that pays $750 or more in interest, rent, dividends, annuities, gambling winnings, or similar fixed income to an individual during the calendar year reports those payments on Form 501.¹

Pass-through entities with nonresident members. Partnerships, S corporations, LLCs, and trusts distributing Oklahoma-source income to nonresident members must withhold state income tax and file Form 501 along with a Form 500-B for each nonresident member.³

Remitters of royalty withholding. Anyone withholding Oklahoma income tax from royalty payments made to nonresident royalty owners files Form 501 with the accompanying Forms 1099-MISC or Forms 500-A.¹

File a separate Form 501 for each type of statement being reported. If you already file 1099s with the IRS through the Combined Federal/State Filing Program, Oklahoma receives that data automatically and no separate Form 501 is needed for those 1099s. Forms 500-B for nonresident member withholding are not part of that program and always go through OkTAP directly.²

Dollar Thresholds by Payment Type

Interest, rent, dividends, annuities, gambling winnings, and similar income: $750 or more for the year.
Royalty payments: $10 or more.
Corporate interest on bonds, mortgages, or deeds of trust and corporate dividends paid to individuals: more than $100. Other payors reporting interest use the $750 threshold.
Payments to professionals (Oklahoma residents, or nonresidents providing professional services in Oklahoma): $750 or more.
Broker or agent transactions: $25,000 or more in total commodity or security sales for the year.

Any payment that includes Oklahoma tax withholding must be reported regardless of the dollar amount.¹

When Form 501 Is Due

The deadline depends on what you are reporting:

General information returns for interest, rent, dividends, professional payments, and broker transactions: February 28 of the year following the calendar year of payment.
Royalty withholding returns: January 31 of the following year.
Pass-through entity withholding: the due date of the entity’s own income tax return, including any approved extensions. Each nonresident member’s Form 500-B must also be furnished by that date.

These dates apply to the electronic submission timestamp in OkTAP.¹

How to File Through OkTAP

Oklahoma no longer accepts paper Forms 501, 500-B, 1099, W-2, or W-3. Everything moves through OkTAP.²

Register a business account at OkTAP if you do not already have one. You will need your Oklahoma withholding account ID. If you cannot locate it, call the Taxpayer Resource Center at 405-521-3160.
Sign in, select the “More…” tab, and click the “W-2/1099/500 Filing Center” link under the Filing Center panel.
Choose the file type you are uploading (500-B, 1099, and so on).
In the Attachments section, click “Add” to upload your file. OkTAP validates the file before accepting it. Only files that pass validation will attach.
Click “Submit” to complete the filing.

If a file fails validation, review the error report, fix the issues in your source file, and re-upload.²

What to Have Ready Before You File

Your Federal Employer Identification Number. Form 501 is filed by businesses and payors, so you use the FEIN rather than a Social Security number.
Your Oklahoma withholding account ID, needed to log in and submit.
The completed individual reporting forms that go with your filer category: Forms 500-B for nonresident member withholding, Forms 500-A for royalty withholding, Forms 1099-MISC, or Forms 500 for broker transactions. Each needs payee name, address, taxpayer identification number, payment amount, and any Oklahoma tax withheld.
Summary totals. Form 501 itself is a cover sheet showing the number of statements attached and the total amounts; the supporting forms carry the detail.

The return is signed under penalty of perjury that the information is true, correct, and complete.¹

Pass-Through Entity Withholding

Partnerships, S corporations, LLCs, and trusts must withhold Oklahoma income tax from each nonresident member’s share of Oklahoma-source income. The withholding rate is the highest Oklahoma marginal individual income tax rate. For tax year 2026 that rate drops to 4.5 percent, following legislation reducing the top bracket from 4.75 percent.³⁴

The withheld amount is due on or before the pass-through entity’s income tax return due date, including extensions. If the total annual withholding is expected to exceed $500, quarterly estimated payments are also required. Those payments are due the last day of the month after each calendar quarter: April 30, July 31, October 31, and January 31.⁵

Each nonresident member receives a Form 500-B showing the income distributed and the tax withheld. The entity files those 500-B forms with the Tax Commission using Form 501 as the summary cover.

Exemptions from Nonresident Member Withholding

Members qualifying as tax-exempt under Oklahoma law or under IRC Section 501(c)(3).
A nonresident member who files an affidavit with the Tax Commission agreeing to submit to Oklahoma jurisdiction for tax purposes. The Tax Commission may revoke the exemption if the member fails to comply.
A publicly traded partnership under IRC Section 7704(b) that files an annual information return listing name, address, taxpayer identification number, and other requested data for each unitholder with Oklahoma income over $500.
Categories of income the Tax Commission has removed from withholding by rule.

These exemptions sit in 68 O.S. § 2385.30(D) and (H).³

Penalties

Pass-through entities that miss withholding or filing deadlines face penalties under 68 O.S. § 2385.31.

Late filing or late payment not corrected within 15 days of the tax becoming delinquent: 10 percent of the amount that should have been withheld or paid. Interest runs at 1.25 percent per month for as long as the underpayment continues.
Willfully failing to furnish a nonresident member with a Form 500-B: administrative fine of up to $1,000.
Withholding tax from distributions and keeping the money rather than remitting it: treated as embezzlement under Oklahoma law.

There is a limited grace: paying the required withholding within 30 days of receiving a proposed assessment, or paying voluntarily when filing an amended return, waives the 10 percent penalty. Interest is not waived.⁶

What Form 501 Is Not

Form 501 is not the form Oklahoma residents use to pay personal estimated income tax. That is Form OW-8-ES for individuals and OW-8-ESC for corporations, fiduciaries, and partnerships.⁷ The $500 threshold that triggers individual estimated payments comes from 68 O.S. § 2385.7 and applies to individual taxpayers whose expected liability exceeds $500 after withholdings.⁸ Form 501 is also different from payment vouchers such as Form 511-V, which accompanies a check for individual income tax due with a return.

Records to Keep

Keep copies of the filed Form 501, every accompanying statement (500-B, 500-A, 1099-MISC, 500), and the underlying documentation used to calculate payments and withholding. The IRS recommends keeping employment tax records at least four years after the tax becomes due or is paid, whichever is later. General income records should be kept at least three years from the filing date, or six years if there is reason to believe income was underreported by more than 25 percent of gross income.⁹ Oklahoma does not publish a separate schedule that overrides those periods, so following the federal guidance is the safer approach.

1
Oklahoma Tax Commission. Form 501 – Annual Information Return
2
Oklahoma Tax Commission. Help Center – Tax Document Filing Info
3
Justia Law. Oklahoma Code 68-2385.30 – Withholding by Pass-Through Entities
4
Oklahoma State Senate. Oklahoma Legislature Sends Comprehensive Tax Cuts and Modernization Plan to Governor
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New York Codes, Rules and Regulations. Oklahoma Code 68-2385.30 – Withholding by Pass-Through Entities
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New York Codes, Rules and Regulations. Oklahoma Code 68-2385.31 – Amounts Withheld by Pass-Through Entities
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Legal Information Institute. Oklahoma Administrative Code 710-50-13-6 – Payment of Estimated Tax
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New York Codes, Rules and Regulations. Oklahoma Code 68-2385.7 – Declaration of Estimated Tax
9
Internal Revenue Service. How Long Should I Keep Records