S-Corp Election in South Dakota (Form 2553) (2026)

Q: How do I elect S-corp status in South Dakota?

You elect S-corp status federally by filing IRS Form 2553 with the IRS; there is no separate South Dakota election because the state has no corporate or personal income tax. An eligible LLC or corporation files Form 2553, and once accepted the IRS treats the business as an S corporation.

Q: Does South Dakota have a state S-corp tax?

No. South Dakota does not impose a corporate income tax or a personal income tax, so there is no separate state-level S-corporation tax or election. The S-corp election affects only federal tax treatment. South Dakota businesses still handle federal filings and any applicable sales or excise taxes.

Q: Who is eligible to elect S-corp status?

To qualify, the business must be a domestic entity with no more than 100 shareholders, only allowable shareholders (generally individuals, certain trusts, and estates), only one class of stock, and no ineligible shareholders such as nonresident aliens or most entities. An LLC electing S-corp status must meet these rules.

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

You elect S-corp status by filing IRS Form 2553, generally due within 2 months and 15 days after the start of the tax year. South Dakota has no corporate or personal income tax, so there is no separate state S-corp election - the election is purely federal. You must still pay yourself a reasonable salary and file Form 1120-S.

Quick Answer

Federal form: IRS Form 2553, Election by a Small Business Corporation
Deadline: Generally 2 months + 15 days after the tax year begins
State election: None - South Dakota has no corporate or personal income tax
S-corp return: Federal Form 1120-S; shareholders get Schedule K-1
Reasonable salary: Required for owner-employees before distributions
Eligibility: Domestic, ≤100 shareholders, one class of stock, eligible owners

What the S-Corp Election Is

An "S corporation" is not a type of entity you form with a state - it is a federal tax election. You first create an entity, usually an LLC or a corporation, and then ask the IRS to tax it under Subchapter S by filing Form 2553. Once the election is accepted, the business is a pass-through for federal income tax: profits and losses flow to the shareholders' personal returns via Schedule K-1, avoiding the double taxation of a traditional C corporation, while letting owner-employees split earnings between wages and distributions.

The reason many South Dakota business owners consider the election is self-employment tax. In a default LLC, the owner pays 15.3% self-employment tax on essentially all net profit. Under an S-corp election, only the owner's reasonable salary is subject to Social Security and Medicare (payroll) taxes; additional profit taken as a distribution is not subject to those taxes. That potential savings is the core appeal, but it comes with payroll obligations and a separate business return. See S-corp vs LLC and the national S-corp election guide for the full comparison.

Eligibility to Elect S-Corp Status

Not every business can be an S corporation. To qualify under the Internal Revenue Code, the business must be a domestic entity and meet strict shareholder rules. It may have no more than 100 shareholders; its shareholders must be eligible owners - generally individuals, certain trusts, and estates, but not partnerships, corporations, or nonresident alien individuals; and it may have only one class of stock. An LLC electing S-corp status must be able to satisfy these requirements as if it were a corporation.

For a South Dakota LLC or corporation owned by one or a few US-resident individuals, these requirements are usually easy to meet. Problems arise when ownership includes another business entity, a non-US owner, or arrangements that look like a second class of stock. If your ownership is more complex, confirm eligibility carefully before filing, because a defective election can be rejected or later invalidated. If you have not yet formed the entity, review single-member LLC basics and the South Dakota registered agent requirement first.

The Form 2553 Deadline

Timing is the part owners most often get wrong. To have the election take effect for a given tax year, Form 2553 is generally due no later than 2 months and 15 days after the beginning of that tax year. For a calendar-year business wanting S-corp treatment starting January 1, that puts the deadline in mid-March. You may also file the election at any time during the preceding tax year. A brand-new entity's clock starts when it first has shareholders, acquires assets, or begins doing business - whichever happens first.

If you miss the window, all is not lost. The IRS provides late election relief: a business can still be treated as an S corporation from the intended date if it had reasonable cause for filing late and meets the relief requirements, typically by filing Form 2553 with a statement of reasonable cause. Even so, the clean path is to file on time. Mark the deadline when you form the entity, and get your EIN first, since Form 2553 requires it.

Item	Detail
Election form	IRS Form 2553 (federal only)
General deadline	2 months + 15 days after the tax year starts
Late relief	Available with reasonable cause under IRS procedures
Annual return	Form 1120-S; Schedule K-1 to each shareholder
South Dakota income tax	None (no corporate or personal income tax)

South Dakota Has No State Income Tax

South Dakota is one of the few states with no corporate income tax and no personal income tax. That has two consequences for the S-corp election. First, there is no separate South Dakota S-corporation election to file - unlike some states that require their own election or recognition, South Dakota simply has no state income tax regime for the election to interact with. Second, the entire S-corp cost-benefit analysis in South Dakota is federal: the only taxes the election changes are federal income and payroll taxes.

This does not mean a South Dakota business has no state obligations. The South Dakota Department of Revenue administers sales and use tax, contractors' excise tax, and other taxes that can apply regardless of income tax status, and the South Dakota Secretary of State handles entity formation, registered agents, and annual reports. An S-corp election does not remove those duties. What South Dakota's tax landscape does mean is that, compared with a high-income-tax state, the payroll-tax savings from an S-corp election are the whole story - there is no additional state income tax layer to model. Review business tax for the sales-tax side.

Reasonable Salary and Ongoing Filing

The S-corp election trades simplicity for a payroll obligation. An owner who works in the business must be treated as an employee and paid reasonable compensation - a salary comparable to what the role would command in the open market - before taking remaining profit as distributions. The IRS actively challenges S corporations that pay owners little or no wage while distributing large profits, because that pattern dodges Social Security and Medicare taxes. Setting a defensible salary, running actual payroll, and withholding and depositing payroll taxes are non-negotiable parts of operating as an S corporation.

Each year the S corporation files Form 1120-S, its federal income tax return, and issues a Schedule K-1 to each shareholder reporting their share of income. Shareholders report that K-1 income on their personal returns. Because South Dakota has no personal income tax, resident owners do not file a state income tax return on that pass-through income - but they still owe federal tax. The added cost of payroll processing, a separate return, and bookkeeping is why the election usually makes sense only once profits are high enough that the payroll-tax savings clearly exceed the extra cost. Compare with an S-corp vs C-corp analysis and sibling state guides like Arizona and Alaska to see how state rules change the math.

A practical rule of thumb: run the numbers before you elect. Estimate your reasonable salary, the payroll taxes on it, and the self-employment tax you would otherwise pay on all profit as a default LLC. The election tends to pay off when net profit comfortably exceeds a reasonable salary, because only the salary carries payroll tax while the remaining distribution does not. Against that saving, subtract the real cost of payroll services, a separate Form 1120-S, and the bookkeeping to support a defensible salary. Also confirm the election does not disrupt owner benefits such as retirement contributions or health coverage, which are treated differently for S-corporation owner-employees. When the analysis is close, many owners wait until profit is clearly high enough before filing Form 2553.

Frequently Asked Questions

How do I elect S-corp status in South Dakota?

You elect S-corp status federally by filing IRS Form 2553; there is no separate South Dakota election because the state has no corporate or personal income tax. An eligible LLC or corporation files Form 2553, and once accepted the IRS treats the business as an S corporation.

What is the deadline to file Form 2553?

Form 2553 is generally due no later than 2 months and 15 days after the beginning of the tax year the election takes effect, or any time during the preceding tax year. Late elections may still be accepted with reasonable cause under IRS relief procedures.

Does South Dakota have a state S-corp tax?

No. South Dakota imposes no corporate income tax or personal income tax, so there is no separate state-level S-corporation tax or election. The election affects only federal tax treatment, though sales and excise taxes may still apply.

Do I have to pay myself a salary as an S corporation?

Yes. An owner who works in the business must be paid reasonable compensation as a wage, subject to payroll taxes, before taking additional profit as distributions. The IRS scrutinizes S corporations that pay little or no salary while taking large distributions.

Who is eligible to elect S-corp status?

The business must be domestic with no more than 100 shareholders, only allowable shareholders (generally individuals, certain trusts, and estates), one class of stock, and no ineligible owners such as nonresident aliens or most entities. An LLC electing S-corp status must meet these rules.

Should my South Dakota LLC elect S-corp status?

It can save self-employment tax once profits are high enough to justify payroll and Form 1120-S, but it adds cost and complexity. Because South Dakota has no state income tax, the analysis is purely federal. Weigh the payroll-tax savings against added compliance.

Sources

IRS - About Form 2553, Election by a Small Business Corporation.
IRS - Instructions for Form 2553 (2 months 15 days deadline; late relief).
IRS - S Corporations.
IRS - S Corporation Compensation and Medical Insurance Issues (reasonable salary).
IRS - About Form 1120-S, U.S. Income Tax Return for an S Corporation.
IRS - Limited Liability Company (LLC) (electing corporate treatment).
IRS - About Form 8832, Entity Classification Election.
IRS - Get an Employer Identification Number.
South Dakota Department of Revenue - Business Taxes (no corporate income tax; sales and excise tax).
South Dakota Secretary of State - Corporations - Contact.
South Dakota Secretary of State - Business Resources.
South Dakota Secretary of State - Business Entity Search.
Cornell Law LII - 26 U.S.C. § 1361, S corporation defined.
Cornell Law LII - 26 U.S.C. § 1362, Election; revocation; termination.
Cornell Law LII - 26 CFR § 301.7701-3, Classification of certain business entities.
Cornell Law LII - S Corporation (legal definition).

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. Deadlines, forms, and requirements change; verify current requirements with the IRS and the South Dakota Department of Revenue before acting.