Does Oklahoma recognize the federal S-corporation election?

Yes. Oklahoma follows the federal S election, and no separate state election form is required — filing federal Form 2553 with the IRS is enough. The corporation does still file Form 512-S (Oklahoma Small Business Corporation Income Tax Return); must be e-filed per OAC 710:50-17-1. Due 30 days after the federal return due date.

Which Oklahoma return does an S corporation file?

Form 512-S (Oklahoma Small Business Corporation Income Tax Return); must be e-filed per OAC 710:50-17-1. Due 30 days after the federal return due date.

S-corp election · OK

Oklahoma S-Corporation Election

By Edmond Hui · Facts verified July 29, 2026 against primary state sources

Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.

Oklahoma follows the federal S election. Filing IRS Form 2553 is enough — there is no separate Oklahoma election form. Oklahoma is one of 43 states that follow the federal election with no state form of their own.

State treatmentFollows the federal election

Separate state formNot required

State corporate income taxYes

Does Oklahoma recognize the federal S election?

State treatment of the S election

Follows the federal election	Yes
Separate state election form	None required
State return	Form 512-S (Oklahoma Small Business Corporation Income Tax Return); must be e-filed per OAC 710:50-17-1. Due 30 days after the federal return due date.

No separate state election to file: the federal election on IRS Form 2553 carries over. That is the election only — the corporation still files Form 512-S. Of the 50 states, 43 follow the federal election with no state form of their own, and 1 more — New York — recognizes S status but requires an election of its own as well.

Oklahoma corporation vs Oklahoma LLC

State filing charges only. Corporate income tax and franchise tax are excluded because both depend on income or net worth, so no flat figure exists for either entity.

	Corporation	LLC
Formation filing fee	$50	$100
Report cadence	Not required	Every year
Report fee	No report required	$25

Worth noticing: a corporation is $50 cheaper to file here than an LLC. That is the exception nationally — corporations are the cheaper filing in only 15 of the 50 states, the two entities cost the same in 25, and the LLC is cheaper in 10.

Full Oklahoma LLC cost breakdown · LLC vs C-corp explained · LLC vs S-corp explained

How Oklahoma compares

State treatment of the federal S election	States
Follows the federal election, no state form needed	43
No corporate income tax, so no state election exists	4
Has a corporate income tax and does not follow the election — the corporation is taxed like a C corporation	2
Follow the election but still impose some entity-level tax on the S corporation — California, Illinois, New York, Massachusetts and Delaware among them	—
Require a separate state election form as well	1

Compare all 50 states · LLC vs S-corp · S-corp salary and savings calculator

Frequently Asked Questions

: Yes. Oklahoma follows the federal S election, and no separate state election form is required — filing federal Form 2553 with the IRS is enough. The corporation does still file Form 512-S (Oklahoma Small Business Corporation Income Tax Return); must be e-filed per OAC 710:50-17-1. Due 30 days after the federal return due date.
: Form 512-S (Oklahoma Small Business Corporation Income Tax Return); must be e-filed per OAC 710:50-17-1. Due 30 days after the federal return due date.

Where these numbers come from

This page covers how Oklahoma treats the federal S-corporation election and what an S corporation still owes the state. Every figure was checked against Oklahoma's own published sources on July 29, 2026— the state business filing agency's fee schedule, the governing statute, and where a state tax applies, the state Department of Revenue. Commercial formation-service pages were used as leads only and are never cited. Anything the review could not confirm from an official source is left blank on this page rather than filled with an estimate.

Corporate income tax and franchise tax are quoted as the state publishes them, as rate schedules and thresholds, and are excluded from every dollar total here. They depend on income or net worth, so there is no flat figure that would be true for every corporation.

Primary sources: