Does Missouri recognize the federal S-corporation election?

Yes. Missouri 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 MO-1120S, S Corporation Income Tax Return (due the 15th day of the 4th month after the close of the tax year — April 15 for calendar-year filers).

Which Missouri return does an S corporation file?

Form MO-1120S, S Corporation Income Tax Return (due the 15th day of the 4th month after the close of the tax year — April 15 for calendar-year filers).

S-corp election · MO

Missouri 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.

Missouri follows the federal S election. Filing IRS Form 2553 is enough — there is no separate Missouri election form. Missouri 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 Missouri 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 MO-1120S, S Corporation Income Tax Return (due the 15th day of the 4th month after the close of the tax year — April 15 for calendar-year filers)

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 MO-1120S, S Corporation Income Tax Return. 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.

What an S corporation still owes Missouri

Missouri has no separate state S election — an entity treated as an S corporation federally files Form MO-1120S, which is largely informational because the tax is paid by shareholders on their Missouri individual returns. The S corp must withhold for nonresident shareholders (Form MO-1NR) unless the shareholder files Form MO-3NR or participates in a composite return. Under the SALT Parity Act an S corporation may annually elect to become an 'affected business entity' and pay tax at the entity level on Form MO-PTE (due the 15th day of the 4th month after year end); members then claim a SPA tax credit. The Department still expects Form MO-1120S even when Form MO-PTE is filed.

Franchise or gross-receipts tax

Missouri's corporation franchise tax has been repealed. Form MO-FT survives only to AMEND franchise tax years 2001–2015; no franchise, privilege or capital-stock tax is imposed on Missouri corporations for current years.

Missouri corporation vs Missouri 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	$58	$50
Report cadence	Every year	Not required
Report fee	$20	No report required

An LLC is $8 cheaper to file here. That is a one-off charge, so it should not decide the entity type on its own.

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

How Missouri 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. Missouri 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 MO-1120S, S Corporation Income Tax Return (due the 15th day of the 4th month after the close of the tax year — April 15 for calendar-year filers).
: Missouri has no separate state S election — an entity treated as an S corporation federally files Form MO-1120S, which is largely informational because the tax is paid by shareholders on their Missouri individual returns. The S corp must withhold for nonresident shareholders (Form MO-1NR) unless the shareholder files Form MO-3NR or participates in a composite return. Under the SALT Parity Act an S corporation may annually elect to become an 'affected business entity' and pay tax at the entity level on Form MO-PTE (due the 15th day of the 4th month after year end); members then claim a SPA tax credit. The Department still expects Form MO-1120S even when Form MO-PTE is filed.
: Form MO-1120S, S Corporation Income Tax Return (due the 15th day of the 4th month after the close of the tax year — April 15 for calendar-year filers).

Where these numbers come from

This page covers how Missouri treats the federal S-corporation election and what an S corporation still owes the state. Every figure was checked against Missouri'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: