21.1 S Election Requirements (Form 2553)
Key Takeaways
S corporations elect S status by filing Form 2553 with all shareholders consenting.
Must be a domestic corporation with no more than 100 shareholders (family-aggregation rule allows 6-generation family to count as one).
Only one class of stock is permitted (voting differences allowed).
Shareholders must be individuals (US citizens or residents), estates, or certain trusts (no partnerships, C corps, or NRAs).
For Tax Year 2025 effectiveness on a calendar year, Form 2553 must be filed by March 17, 2025 (or any time during 2024).
Late election relief is available with reasonable cause under Rev. Proc. 2013-30.
Why This Matters for the Exam
S corporation eligibility requirements are heavily tested on Part 2. The exam tests the specific requirements, filing deadlines, and what can disqualify a corporation from S status.
Exam Note: For the July 1, 2026 - February 28, 2027 testing window, you are tested on S corporation rules as of December 31, 2025 (Tax Year 2025). OBBBA did not change Subchapter S eligibility rules, but it made QBI (§199A) permanent and reset EBL (§461(l)) permanently — both affect S corp shareholders.
What Is an S Corporation?
An S corporation is a corporation that elects to pass corporate income, losses, deductions, and credits through to its shareholders for federal tax purposes.
| Feature | S Corporation |
|---|---|
| Taxation | Pass-through (no entity-level tax) |
| Legal structure | Corporation (limited liability) |
| Double taxation | Avoided |
| Best for | Small businesses with U.S. individual owners |
Eligibility Requirements
To elect S status, a corporation must meet all of the following:
| Requirement | Detail |
|---|---|
| Domestic corporation | Organized in the U.S. |
| 100 shareholders maximum | Family members can count as one |
| One class of stock | Voting differences allowed |
| Eligible shareholders only | Individuals, estates, certain trusts |
| No ineligible shareholders | No partnerships, corporations, NRAs |
The 100-Shareholder Limit
| Rule | Description |
|---|---|
| Maximum | 100 shareholders |
| Family rule | All members of a family (6 generations) can elect to count as one shareholder |
| Spouses | Count as one shareholder |
| Estates | Count as separate shareholders |
One Class of Stock Rule
| Permitted | Not Permitted |
|---|---|
| Common stock with voting rights | Preferred stock |
| Common stock without voting rights | Different distribution rights |
| Different voting rights only | Different liquidation rights |
Key Point: All shares must have identical rights to distributions and liquidation proceeds. Voting differences are okay.
Eligible Shareholders
| Eligible | Ineligible |
|---|---|
| U.S. citizens and residents | Non-resident aliens (NRAs) |
| Decedent's estates | Partnerships |
| Bankruptcy estates | Corporations |
| Grantor trusts | LLCs taxed as partnerships |
| Qualified Subchapter S Trusts (QSSTs) | Foreign trusts |
| Electing Small Business Trusts (ESBTs) | Other tax-exempt organizations |
| 401(a) and 501(c)(3) exempt organizations |
Form 2553 Filing Deadline
| Scenario | Filing Deadline |
|---|---|
| New corporation | Within 2 months 15 days after its first tax year begins |
| Existing corporation (calendar year) | March 15 for current year effectiveness |
| Prior year election | Any time during the prior tax year |
For Tax Year 2025 Calendar-Year Corporation:
- File Form 2553 by March 17, 2025 for 2025 effectiveness.
- Or file any time during 2024 for 2025 effectiveness.
All Shareholders Must Consent
Every shareholder must sign Form 2553 or a separate consent statement.
| Situation | Requirement |
|---|---|
| All shareholders | Must consent |
| Community property | Both spouses must consent |
| New shareholders | Need not re-consent (bound by election) |
Late Election Relief
The IRS grants relief for late-filed Form 2553 if:
| Requirement | Description |
|---|---|
| Reasonable cause | Failure was inadvertent |
| Timely returns | Corporation filed returns consistent with S status |
| Intent | Corporation and shareholders intended S election |
Revenue Procedure 2013-30 provides simplified relief if Form 2553 is filed within 3 years and 75 days of the intended effective date.
Real-World Scenario
Scenario: A corporation already in existence on January 1, 2025, wants S status for its calendar tax year 2025. When must Form 2553 be filed?
- Deadline: Within 2 months 15 days of formation = March 31, 2025.
- All shareholders: Must sign Form 2553.
- If missed: Apply for late election relief under Rev. Proc. 2013-30.
On the Exam
Question types to practice on S election:
- Shareholder Limit Questions: "What is the maximum number of shareholders?"
- Eligible Shareholder Questions: "Which entity CANNOT be an S corp shareholder?"
- Stock Questions: "What stock differences are permitted?"
- Deadline Questions: "When must Form 2553 be filed?"
The key is to remember: 100 shareholders max. One class of stock (voting differences OK). Only individuals, estates, certain trusts. No partnerships, corporations, or NRAs.
What is the maximum number of shareholders an S corporation can have?
50
75
100
150
Which of the following is NOT an eligible S corporation shareholder?
U.S. citizen
Estate
Partnership
Grantor trust
For a calendar-year corporation to have S status effective for Tax Year 2025, by what date must Form 2553 be filed?
December 31, 2024
March 17, 2025 (March 15 fell on Saturday)
April 15, 2025
Any time in 2025
Sections you finish are checked off in the contents.