Oklahoma LLC annual report & franchise tax deadlines 2026-2027
Every recurring Oklahoma filing for LLCs, S corps and C corporations — due dates, fees and the official source for each. Last verified Oct 21, 2026.
LLC
| Report | Annual Certificate Confirmed on official page |
|---|---|
| Due | Each year on the anniversary date of registration (60-day grace period) |
| State fee | $25 |
| How often | annual |
Corporation (C & S corp)
| Report | No annual report or franchise tax Confirmed on official page |
|---|---|
| Due | Oklahoma corporations file no SOS annual report; the Oklahoma franchise tax ended after tax year 2023 (HB 1039X) |
| State fee | — |
| How often | annual |
Franchise & entity-level taxes
| No separate statewide franchise or entity-level tax listed for this state. |
State income & estimated tax
| Corporate income tax | Yes |
|---|---|
| C corp return | Apr 15 (Form 512) |
| Partnership / S corp return | Apr 15 (Form 514 / 512-S) — verify |
| Corporate estimates | Apr 15, Jun 15, Sep 15, Dec 15 (follows the federal corporate schedule) |
General pattern — verify Calendar-year pattern; confirm with the revenue department.
Sales tax
Filing frequency (monthly, quarterly or annual) is assigned by the state based on your tax liability. Returns are generally due the 20th of the month after the reporting period.
General pattern — verify Your assigned frequency and due day appear in your state tax account.
IRS disaster postponements in Oklahoma
No active IRS disaster postponements for Oklahoma as of Oct 21, 2026. See all deadline changes.
Your Oklahoma calendar
Add your formation month/year to date anniversary-based reports. Calendar-year filers; weekend and federal-holiday dates roll to the next business day.
Upcoming deadlines
Not tax advice — verify each date with the linked source. Fiscal-year filers' dates differ.
Tools that help you stay compliant
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Oklahoma deadline FAQ
When is the Oklahoma LLC annual report due?
Each year on the anniversary date of registration (60-day grace period).
How much does the Oklahoma LLC annual report cost?
State fee: $25.
When is the Oklahoma corporation annual report due?
Oklahoma corporations file no SOS annual report; the Oklahoma franchise tax ended after tax year 2023 (HB 1039X). Fee: —. S corporations file the same report as other corporations.
Does Oklahoma have a franchise tax or annual LLC tax?
We don't list a separate statewide franchise or entity-level tax for Oklahoma. Income and sales taxes may still apply.
When are Oklahoma business income tax returns due?
C corporations: Apr 15 (Form 512). Pass-through entities (partnerships, S corps): Apr 15 (Form 514 / 512-S) — verify. These are general calendar-year patterns — confirm with the state revenue department.
How often do I file Oklahoma sales tax?
Filing frequency (monthly, quarterly or annual) is assigned by the state based on your tax liability. Returns are generally due the 20th of the month after the reporting period.
What happens if I miss a Oklahoma deadline?
Most states charge a late fee or penalty and interest, and an entity that keeps missing its annual report can lose good standing and eventually be administratively dissolved. Check the official source for the exact penalty and reinstatement steps.
Official sources
- https://www.sos.ok.gov/business/default.aspx
- https://oklahoma.gov/tax
- https://www.sos.ok.gov/corp/filing.aspx
- https://www.sos.ok.gov/forms/Llcannualcertificate.PDF
- https://www.sos.ok.gov/forms/FM0074.PDF
- https://oklahoma.gov/tax/businesses/other-taxes.html
- https://oklahoma.gov/content/dam/ok/en/tax/documents/forms/businesses/general/FRX-200.pdf
Federal dates: IRS Publication 509. Disaster relief: IRS tax relief in disaster situations.
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