Oklahoma business filing dates, 2027

State-level due dates for businesses filing in Oklahoma. Every line links to the official page it came from, with the date that page was read. Where no official source has been verified, the line says so instead of showing a date.

Add to Google Calendar Add to Apple or Outlook Download .ics14 dated lines in the calendar file · sources last read 2026-09-23

Coverage · 5 of 6 fully dated

Income / franchise tax returnnot dated yet
Estimated taxno fixed date
Withholdingno fixed date
Unemployment insuranceno fixed date
Sales and use tax14 dates
Annual reportno fixed date

Income / franchise tax return

Unsupported

The annual return for the business’s tax year, and in franchise-tax states the report that keeps the entity in good standing. Which form and which date depend on the entity type and the tax year. Where the source grants an extension, it extends the time to file; the source says whether it also extends the time to pay.

Why no dates: No official source confirmed yet for Oklahoma's business income or franchise tax return due dates.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Income / franchise tax return	Applies toShown once verified	Due ruleUnsupported	2027 datesNo official source confirmed yet for Oklahoma's business income or franchise tax return due dates.	Source · retrievedNo verified source on file

Estimated tax

no fixed date

Installments paid during the year toward the year’s tax. Whether a business must pay them depends on its expected liability, which this page cannot know; the lines show when installments fall due for those who must.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Corporate estimated tax requirement Source text “You are required to make quarterly estimated tax payments, if you can reasonably expect your tax liability to exceed the amount withheld by $500.00 or more and you expect your withholding to be less than the smaller of 70% of your current year's liability or the tax liability shown on your return for the preceding taxable year of twelve months.”verbatim · oklahoma.gov · retrieved 2026-09-23	Applies toA corporation that can reasonably expect its tax to exceed its withholding by $500 or more (and withholding below the smaller of 70% of this year's or last year's tax) makes quarterly estimated payments. The installment dates are not stated on this source.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklahoma.gov/tax/helpcenter/businesses.html (official source, opens in a new tab)retrieved 2026-09-23

Withholding

no fixed date

Returns and deposits of income tax withheld from employees’ wages. The agency assigns each employer a deposit frequency, usually from its past liability, so the dates differ by frequency.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Withholding payment schedule Source text “More than $500 per quarter \| Monthly”verbatim · oklahoma.gov · retrieved 2026-09-23 “Less than $500 per quarter \| Quarterly”verbatim · oklahoma.gov · retrieved 2026-09-23 “$10,000 per month \| Twice/Week”verbatim · oklahoma.gov · retrieved 2026-09-23 “Wage withholding returns are due quarterly. Payments are remitted to the Oklahoma Tax Commission (OTC) throughout the quarter on the same schedule the employer remits payments to the IRS.”verbatim · oklahoma.gov · retrieved 2026-09-23	Applies toPayment schedule by amount withheld: more than $500 a quarter monthly; less than $500 a quarter quarterly; $10,000 a month twice weekly. Returns are filed quarterly, and payments follow the employer's IRS deposit schedule. The due dates are not stated on this source.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklahoma.gov/tax/businesses/withholding.html (official source, opens in a new tab)retrieved 2026-09-23

Unemployment insurance

no fixed date

Employer contribution and wage reports for unemployment insurance: the state program, and FUTA at the federal level.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
When an employer owes Oklahoma UI contributions Source text “Employers are generally required to contribute to the unemployment trust fund if: They pay wages totaling $1,500 or more in any calendar quarter OR They have had at least one employee working for a minimum of one day per week for a total of 20 weeks during the calendar year”verbatim · oklahoma.gov · retrieved 2026-09-23	Applies toFor an employer the preparer lists as an Oklahoma unemployment-insurance filer: an employer generally must contribute to the unemployment trust fund if it pays $1,500 or more in wages in any calendar quarter, or had an employee at least one day a week for 20 weeks in the year. Report due dates are not stated on this source.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklahoma.gov/oesc/employers/tax.html (official source, opens in a new tab)retrieved 2026-09-23

Sales and use tax

14 dates

Returns for sales and use tax collected under a permit. The agency assigns each permit holder a filing frequency; the dates differ by frequency.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Sales tax reportsemiannual filer Source text “For most sales tax permit holders, the sales tax from sales made within the state from the first day of the month through the last day of the month must be remitted to the OTC on or before the twentieth day of the month following the month in which the sale was made. Oklahoma sales tax law authorizes semi-annual filing when the tax remitted by the vendor does not exceed $50 a month. Semi-annual sales tax reports are due by July 20th, for the period covering January through June, and January 20th, for the period covering July through December.”verbatim · oklahoma.gov · retrieved 2026-09-23 “C. Any act authorized, required, or permitted to be performed on a holiday as designated in subsection A of this section may be performed on the next succeeding business day, and no liability or loss of rights of any kind shall result from such delay.”verbatim · 25 O.S. §82.1(C) · oklegislature.gov · retrieved 2026-09-24	Applies toMost permit holders remit each month's sales tax by the 20th of the following month. Vendors remitting no more than $50 a month may file semi-annually, by July 20 (January to June) and January 20 (July to December). A Saturday, Sunday or state-holiday date moves to the next business day.	Due ruleSales tax report (January to June): July 20 of the year the calendar year begins; Sales tax report (July to December): January 20 of the year after the calendar year beginsIf this date falls on a Saturday, Sunday or a Oklahoma holiday, it moves to the next business day — 25 O.S. §82.1(C). Not every such holiday is compiled: "The day before or after Christmas if Christmas is not on a Saturday or Sunday" (2026, 2028) is fixed each year by the Governor's Executive Order (§82.1(B)), not by the statute, so neither day is listed; a day the President declares a national holiday and the Governor declares a state holiday (§82.1(B)) is not listed; a public office closed on a §82.2 additional holiday (state election days, Juneteenth National Freedom Day, days designated by the President or Governor) also moves an act to the next business day, and those closures are not published.oklegislature.gov/OK_Statutes/CompleteTitles/os25.pdf (official source, opens in a new tab)retrieved 2026-09-24 · 25 O.S. §82.1(C)	2027 dates Jan 20WedSales tax report (July to December) Jul 20TueSales tax report (January to June) State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrievedoklahoma.gov/tax/helpcenter/businesses.html (official source, opens in a new tab)retrieved 2026-09-23
Sales tax reportmonthly filer Source text “For most sales tax permit holders, the sales tax from sales made within the state from the first day of the month through the last day of the month must be remitted to the OTC on or before the twentieth day of the month following the month in which the sale was made. Oklahoma sales tax law authorizes semi-annual filing when the tax remitted by the vendor does not exceed $50 a month. Semi-annual sales tax reports are due by July 20th, for the period covering January through June, and January 20th, for the period covering July through December.”verbatim · oklahoma.gov · retrieved 2026-09-23 “C. Any act authorized, required, or permitted to be performed on a holiday as designated in subsection A of this section may be performed on the next succeeding business day, and no liability or loss of rights of any kind shall result from such delay.”verbatim · 25 O.S. §82.1(C) · oklegislature.gov · retrieved 2026-09-24	Applies toMost permit holders remit each month's sales tax by the 20th of the following month. Vendors remitting no more than $50 a month may file semi-annually, by July 20 (January to June) and January 20 (July to December). A Saturday, Sunday or state-holiday date moves to the next business day.	Due ruleSales tax report: 20th day of the month after the month endsIf this date falls on a Saturday, Sunday or a Oklahoma holiday, it moves to the next business day — 25 O.S. §82.1(C). Not every such holiday is compiled: "The day before or after Christmas if Christmas is not on a Saturday or Sunday" (2026, 2028) is fixed each year by the Governor's Executive Order (§82.1(B)), not by the statute, so neither day is listed; a day the President declares a national holiday and the Governor declares a state holiday (§82.1(B)) is not listed; a public office closed on a §82.2 additional holiday (state election days, Juneteenth National Freedom Day, days designated by the President or Governor) also moves an act to the next business day, and those closures are not published.oklegislature.gov/OK_Statutes/CompleteTitles/os25.pdf (official source, opens in a new tab)retrieved 2026-09-24 · 25 O.S. §82.1(C)	2027 dates Jan 20WedSales tax report Feb 22MonSales tax report · moved from Sat Feb 20 Mar 22MonSales tax report · moved from Sat Mar 20 Apr 20TueSales tax report May 20ThuSales tax report Jun 21MonSales tax report · moved from Sun Jun 20 Jul 20TueSales tax report Aug 20FriSales tax report Sep 20MonSales tax report Oct 20WedSales tax report Nov 22MonSales tax report · moved from Sat Nov 20 Dec 20MonSales tax report State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrievedoklahoma.gov/tax/helpcenter/businesses.html (official source, opens in a new tab)retrieved 2026-09-23

Sales tax reportsemiannual filer

Source text

“For most sales tax permit holders, the sales tax from sales made within the state from the first day of the month through the last day of the month must be remitted to the OTC on or before the twentieth day of the month following the month in which the sale was made. Oklahoma sales tax law authorizes semi-annual filing when the tax remitted by the vendor does not exceed $50 a month. Semi-annual sales tax reports are due by July 20th, for the period covering January through June, and January 20th, for the period covering July through December.”verbatim · oklahoma.gov · retrieved 2026-09-23

“C. Any act authorized, required, or permitted to be performed on a holiday as designated in subsection A of this section may be performed on the next succeeding business day, and no liability or loss of rights of any kind shall result from such delay.”verbatim · 25 O.S. §82.1(C) · oklegislature.gov · retrieved 2026-09-24

Applies toMost permit holders remit each month's sales tax by the 20th of the following month. Vendors remitting no more than $50 a month may file semi-annually, by July 20 (January to June) and January 20 (July to December). A Saturday, Sunday or state-holiday date moves to the next business day.

Due ruleSales tax report (January to June): July 20 of the year the calendar year begins; Sales tax report (July to December): January 20 of the year after the calendar year beginsIf this date falls on a Saturday, Sunday or a Oklahoma holiday, it moves to the next business day — 25 O.S. §82.1(C). Not every such holiday is compiled: "The day before or after Christmas if Christmas is not on a Saturday or Sunday" (2026, 2028) is fixed each year by the Governor's Executive Order (§82.1(B)), not by the statute, so neither day is listed; a day the President declares a national holiday and the Governor declares a state holiday (§82.1(B)) is not listed; a public office closed on a §82.2 additional holiday (state election days, Juneteenth National Freedom Day, days designated by the President or Governor) also moves an act to the next business day, and those closures are not published.oklegislature.gov/OK_Statutes/CompleteTitles/os25.pdfretrieved 2026-09-24 · 25 O.S. §82.1(C)

2027 dates

Jan 20WedSales tax report (July to December)
Jul 20TueSales tax report (January to June)

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrievedoklahoma.gov/tax/helpcenter/businesses.htmlretrieved 2026-09-23

Sales tax reportmonthly filer

Source text

“For most sales tax permit holders, the sales tax from sales made within the state from the first day of the month through the last day of the month must be remitted to the OTC on or before the twentieth day of the month following the month in which the sale was made. Oklahoma sales tax law authorizes semi-annual filing when the tax remitted by the vendor does not exceed $50 a month. Semi-annual sales tax reports are due by July 20th, for the period covering January through June, and January 20th, for the period covering July through December.”verbatim · oklahoma.gov · retrieved 2026-09-23

“C. Any act authorized, required, or permitted to be performed on a holiday as designated in subsection A of this section may be performed on the next succeeding business day, and no liability or loss of rights of any kind shall result from such delay.”verbatim · 25 O.S. §82.1(C) · oklegislature.gov · retrieved 2026-09-24

Due ruleSales tax report: 20th day of the month after the month endsIf this date falls on a Saturday, Sunday or a Oklahoma holiday, it moves to the next business day — 25 O.S. §82.1(C). Not every such holiday is compiled: "The day before or after Christmas if Christmas is not on a Saturday or Sunday" (2026, 2028) is fixed each year by the Governor's Executive Order (§82.1(B)), not by the statute, so neither day is listed; a day the President declares a national holiday and the Governor declares a state holiday (§82.1(B)) is not listed; a public office closed on a §82.2 additional holiday (state election days, Juneteenth National Freedom Day, days designated by the President or Governor) also moves an act to the next business day, and those closures are not published.oklegislature.gov/OK_Statutes/CompleteTitles/os25.pdfretrieved 2026-09-24 · 25 O.S. §82.1(C)

2027 dates

Jan 20WedSales tax report
Feb 22MonSales tax report · moved from Sat Feb 20
Mar 22MonSales tax report · moved from Sat Mar 20
Apr 20TueSales tax report
May 20ThuSales tax report
Jun 21MonSales tax report · moved from Sun Jun 20
Jul 20TueSales tax report
Aug 20FriSales tax report
Sep 20MonSales tax report
Oct 20WedSales tax report
Nov 22MonSales tax report · moved from Sat Nov 20
Dec 20MonSales tax report

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrievedoklahoma.gov/tax/helpcenter/businesses.htmlretrieved 2026-09-23

Annual report

no fixed date

The annual or biennial report an entity files with the Secretary of State (or its equivalent) to stay in good standing. Some are keyed to the month the entity was formed.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
LLC annual certificate Source text “B. The annual certificate shall be due on the anniversary date of filing the articles of organization, articles of registered series, or registration, as the case may be, until cancellation of the articles of organization or articles of registered series or withdrawal of the registration.”verbatim · oklegislature.gov · retrieved 2026-09-23	Applies toAn LLC the preparer attests is organized in or registered with Oklahoma files an annual certificate ($25) each year, due on the anniversary date of filing its articles of organization or registration. The profile holds the formation month but not the day, so no date is shown.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklegislature.gov/OK_Statutes/CompleteTitles/os18.pdf (official source, opens in a new tab)retrieved 2026-09-23

Entity tax or fee

no fixed date

Entity-level taxes and fees separate from the income return, such as an LLC’s annual tax or fee.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Oklahoma franchise tax ended Source text “Tax year 2023 is the last year that franchise tax returns will be required to be filed. Starting with tax year 2024 and beyond, there will be no Oklahoma franchise tax filing requirement.”verbatim · oklahoma.gov · retrieved 2026-09-23	Applies toTax year 2023 was the last year Oklahoma franchise tax returns were required; from tax year 2024 there is no franchise tax filing requirement.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklahoma.gov/tax/businesses/other-taxes.html (official source, opens in a new tab)retrieved 2026-09-23

Due-date rules

no fixed date

The conventions other lines cite: how a date on a weekend or holiday moves, and how a disaster declaration postpones deadlines.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Weekend and holiday due dates Source text “If a due date falls on Saturday, Sunday or on an observed state holiday, the report is due on the next business day.”verbatim · oklahoma.gov · retrieved 2026-09-23	Applies toAn Oklahoma sales tax report due on a Saturday, Sunday or observed state holiday is due the next business day.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedoklahoma.gov/tax/helpcenter/businesses.html (official source, opens in a new tab)retrieved 2026-09-23

Dates are computed from the linked pages as they read on each retrieval date. Agencies change their pages, and the IRS postpones deadlines after disasters; confirm with the source before filing.

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