Oklahoma: corporate income tax, no franchise tax and an annual report only for foreign corporations.
Each fact below cites the agency page we read and the day we read it. Where a rule is still being confirmed, the page says so instead of showing a zero.
Verified facts
Corporate income tax
Yes
4%
Franchise or privilege
No
Entity annual report
Foreign corporations only
annual, for foreign corporations only · Foreign corporations must file an annual certificate with the Secretary of State on the anniversary of their qualification in Oklahoma each year.
Return due date
Not verified
Not verifiedExtension
Available
Zero activity / minimum tax
A corporation doing business in or deriving income from Oklahoma must file whether or not a tax is due.
No minimum corporate income tax amount is stated; the former minimum franchise tax ($1.25 per $1,000, capital threshold $201,000) no longer applies from tax year 2024.
Long-form guide in professional review
Dates, extensions and payments
Filing and payment dates stay separate wherever the source supports it.
- Filing
Return filing
Not settled for the same reason; the instructions phrase it as 30 days after the federal due date, the FAQ as the 15th day of the fourth month after year end.
- Extension
Extension
Does not extend paymentMust be requested
- Entity report
Entity report
annual, for foreign corporations onlyForeign corporations must file an annual certificate with the Secretary of State on the anniversary of their qualification in Oklahoma each year.
Title 18 contains annual certificate/annual report provisions for LLCs (18 O.S. 2055.2), cooperatives (18 O.S. 441-207) and foreign corporations (18 O.S. 1142(17)), but none for domestic business corporations.
Email me the Oklahoma guide
We send you this page with its sources, and we tell you if a date changes.
Frequently asked questions
Does Oklahoma impose a corporate income tax?
Yes. 4% Form: Form 512, Oklahoma Corporation Income Tax Return (Form 512-S for S corporations).
Does Oklahoma charge a franchise or privilege tax?
No. The official source consulted does not impose a franchise tax on corporations.
Does an extension also postpone the tax payment?
No. The extension moves the filing date, not the payment date; unpaid tax can accrue penalty and interest.
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