S-Corp Election in Missouri (Form 2553) (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

To elect S-corporation status for a Missouri LLC or corporation, file IRS Form 2553 with the IRS — generally within 2 months and 15 days of the start of the tax year the election takes effect. The election is federal; Missouri recognizes the federal S-corp election and taxes the pass-through income to shareholders on their Missouri returns; the S-corp files Form MO-1120S. An S-corp lets owners take a reasonable salary plus distributions, potentially reducing self-employment tax.

What an S-Corp Election Is

An S corporation is not a type of entity you form at the Missouri Secretary of State; it is a federal tax election made by an existing corporation or LLC. When you elect S-corp status, the business's income, losses, deductions, and credits pass through to the owners' personal returns (avoiding corporate double taxation), and the entity files Form 1120-S. The rules are set out in 26 U.S. Code § 1361 and § 1362. In Missouri, you would first form an LLC or incorporate, then file Form 2553 to be taxed as an S-corp.

Eligibility Requirements

To qualify for S-corp status the business must be a domestic entity, have no more than 100 shareholders, have only allowed shareholders (U.S. individuals, certain trusts, and estates — not partnerships, corporations, or nonresident aliens), and have only one class of stock. An LLC electing S-corp status is treated as a corporation for tax purposes. All shareholders (or LLC members) must consent to the election by signing Form 2553. If any requirement fails later — for example, an ineligible owner buys in — the S election can terminate and the entity reverts to C-corp or partnership taxation.

The Form 2553 Deadline

Timing is the trap most owners hit. To take effect for the current tax year, Form 2553 must be filed no later than 2 months and 15 days after the beginning of that tax year (March 15 for a calendar-year business), or at any time during the preceding tax year. A brand-new entity measures the window from the date it first has shareholders, acquires assets, or begins doing business. If you miss the deadline, the IRS allows late election relief under Revenue Procedure 2013-30 if you had reasonable cause and file within the relief window — you attach a statement explaining the delay to Form 2553.

Reasonable Salary and Payroll

The main reason owners elect S-corp status is to reduce self-employment tax. An S-corp owner who works in the business must be paid a reasonable salary as a W-2 employee; only that wage is subject to Social Security and Medicare tax. Profits distributed beyond the salary are generally not subject to those payroll taxes. The IRS scrutinizes artificially low salaries, so the wage must reflect what similar work would pay. Running payroll means withholding, Form 941, W-2s, and often a payroll service, so the strategy makes sense mainly once profits comfortably exceed a reasonable salary.

Missouri State Tax Treatment

Missouri recognizes the federal S-corp election and taxes the pass-through income to shareholders on their Missouri returns; the S-corp files Form MO-1120S. File and register through the Missouri Department of Revenue. Even where a state honors the federal election automatically, the S-corp usually must file a state pass-through or information return, and owners report their share of income on their Missouri individual returns. Some states impose franchise taxes, minimum fees, or entity-level taxes on S-corps regardless of the federal election. Confirm the current Missouri rules before you rely on projected savings, and see Missouri LLC tax filing for the entity-level picture.

How to File Form 2553

Complete Form 2553 with the entity's name, address, EIN, the effective date of the election, the selected tax year, and each shareholder's name, ownership, and consent signature. You need an EIN first. File by mail or fax to the IRS service center listed in the instructions; there is no filing fee. The IRS generally responds within about 60 days confirming whether the election is accepted. Keep the acceptance letter (CP261) with your records. Compare the trade-offs first at S-corp vs LLC.

How the Self-Employment Tax Savings Work

Consider a Missouri LLC owner earning $120,000 of net profit. Taxed by default, essentially all of that profit is hit by the 15.3% self-employment tax. As an S-corp, the owner might take a reasonable salary of, say, $70,000 (subject to Social Security and Medicare tax through payroll) and receive the remaining $50,000 as a distribution that is generally not subject to those payroll taxes. The savings come from that untaxed distribution slice. The larger the gap between a defensible salary and total profit, the bigger the benefit — which is why the election rarely helps until profit comfortably clears a reasonable salary plus the cost of payroll.

The critical variable is reasonable compensation. If you pay yourself an artificially low salary to shift more into distributions, the IRS can recharacterize the distributions as wages and assess back payroll taxes, interest, and penalties. Base the salary on what comparable work pays in your industry and region, and document how you set it. Distributions must also track ownership, and the S-corp must maintain a single class of stock.

Costs and Ongoing Compliance of an S-Corp

The election is free to file, but running an S-corp is not free. You must operate payroll: withhold and deposit federal (and Missouri) income tax and FICA, file quarterly Form 941, pay federal and state unemployment tax, and issue a W-2 each January. Most owners use a payroll service, which typically costs several hundred dollars a year. At tax time the S-corp files its own Form 1120-S return with Schedule K-1s, so preparation fees are higher than for a disregarded LLC. Add any Missouri pass-through return or franchise/minimum tax, and the total compliance cost can run well over a thousand dollars annually.

Because of those fixed costs, the S-corp election is generally worthwhile only once the self-employment tax savings exceed the added payroll and filing expense — often when net profit is comfortably in the five figures and stable. Run the numbers for your own situation, ideally with a CPA, and revisit the decision yearly. You can revoke the election later, though timing rules apply. Start by comparing structures at forming a Missouri LLC.

Common S-Corp Election Mistakes

The single biggest error is missing the filing window. Owners decide mid-year to be an S-corp, then discover Form 2553 had to be filed within two months and 15 days of the tax year start. Late-election relief exists, but it depends on reasonable cause and prompt correction, so do not rely on it. The second frequent mistake is paying an unreasonably low salary to maximize distributions; the IRS actively challenges this and can reclassify distributions as wages with back tax and penalties. A third is electing too early — before profit justifies the payroll and filing costs — so the election actually costs more than it saves.

Other pitfalls: forgetting that an S-corp must run real payroll with quarterly Form 941 filings and a January W-2; assuming Missouri automatically mirrors the federal election without checking for a separate state filing or entity-level tax; and letting an ineligible owner (such as a partnership or nonresident alien) or a second class of stock quietly terminate the election. Keep the CP261 acceptance letter, calendar every payroll and return deadline, and revisit the election yearly. When the stakes are meaningful, have a CPA confirm the salary and the math — see Missouri self-employment tax for the baseline.

Frequently Asked Questions

What is the deadline to file Form 2553 in Missouri?

File Form 2553 no later than 2 months and 15 days after the start of the tax year the election takes effect (March 15 for a calendar-year business), or anytime during the prior tax year. Late relief may be available with reasonable cause.

How much does an S-corp election cost?

The IRS charges no fee to file Form 2553. Your costs come from running payroll for the required reasonable salary and preparing the annual Form 1120-S return, plus any state filing fees or entity-level taxes.

Does Missouri recognize the federal S-corp election?

Missouri recognizes the federal S-corp election and taxes the pass-through income to shareholders on their Missouri returns; the S-corp files Form MO-1120S. Confirm the current filing and any entity-level tax rules with the state before relying on projected savings.

Can an LLC elect S-corp status?

Yes. An LLC can elect to be taxed as an S corporation by filing Form 2553 (and, if needed, Form 8832). The LLC keeps its legal structure but is taxed as an S-corp, so owners take a reasonable salary plus distributions.

Does an S-corp election lower self-employment tax?

It can. Only the owner's reasonable W-2 salary is subject to Social Security and Medicare tax; distributions above the salary generally are not. The savings must outweigh payroll and filing costs to be worthwhile.

Related

• Business tax overview (cluster hub)
• S-corp vs LLC compared
• Form a Missouri LLC first
• How to get an EIN
• Missouri self-employment tax
• Missouri LLC tax filing
• Business and tax glossary

Sources

1. IRS — About Form 2553, Election by a Small Business Corporation
2. IRS — S Corporations (Form 1120-S; reasonable compensation)
3. IRS — About Form 1120-S, U.S. Income Tax Return for an S Corporation
4. IRS — About Form 8832, Entity Classification Election
5. IRS — Get an Employer Identification Number (free; online, fax, mail, or phone for foreign applicants)
6. IRS — Business Structures
7. Cornell LII — 26 U.S. Code § 1361 — S corporation defined
8. Cornell LII — 26 U.S. Code § 1362 — Election; revocation; termination
9. Cornell LII — 26 CFR § 301.7701-3 — Classification of certain business entities
10. Missouri Department of Revenue — Business Tax (Form MO-1120S)
11. Missouri Secretary of State — Corporations Division

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the official state agency and the IRS before acting.