Federal Entity Classification
Federal law generally treats a domestic eligible entity with one owner as disregarded unless it elects otherwise, subject to stated exceptions. S corporation shareholder eligibility is governed by the statutory shareholder bar, plus separate IRS instructions for stock held by a disregarded single-member LLC. A QSub must meet its own statutory definition and receives the federal treatment stated below. This page reports captured rules and does not give election advice or decide whether a particular structure qualifies.
Default classification of an entity-owned single-member LLC
These rows keep the default rule, the effects and exceptions of disregarded treatment, and the election context separate.
| Federal rule | Captured text and evidence |
|---|---|
| Default rule for a domestic single-owner eligible entity | A domestic eligible entity with a single owner is disregarded as an entity separate from its owner by default unless the entity elects otherwise, subject to the paragraph (b)(3) existing-entity exception.Quote: “Except as provided in paragraph (b)(3) of this section, unless the entity elects otherwise, a domestic eligible entity is-- (i) A partnership if it has two or more members; or (ii) Disregarded as an entity separate from its owner if it has a single owner.” Pinpoint: 26 CFR 301.7701-3(b)(1)(ii).(source)Additional captured passages
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| What disregarded treatment does and does not change | A single-owner noncorporate business entity is generally disregarded, but the regulation treats it separately for listed tax liabilities, employment tax, backup withholding owner attribution, self-employment tax treatment, specified excise-tax purposes, section 6038A reporting, and disregarded-payment rules.Quote: “Except as otherwise provided in this paragraph (c), a business entity that has a single owner and is not a corporation under paragraph (b) of this section is disregarded as an entity separate from its owner.” Pinpoint: 26 CFR 301.7701-2(c)(2)(i)-(vii).(source)Additional captured passages
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| Eligible-entity scope and election context | An eligible entity may elect classification; a single-owner eligible entity may elect association treatment or disregarded treatment, and the default classification applies only when no election is made.Quote: “An eligible entity with a single owner can elect to be classified as an association or to be disregarded as an entity separate from its owner. Paragraph (b) of this section provides a default classification for an eligible entity that does not make an election.” Pinpoint: 26 CFR 301.7701-3(a), (b).(source)Additional captured passages
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S corporation shareholder eligibility by federal owner classification
The statutory shareholder bar, the IRS form instruction for a disregarded LLC, and the beneficial-owner regulation are presented as separate authorities.
| Federal rule | Captured text and evidence |
|---|---|
| Statutory shareholder bar | Section 1361 bars an S corporation from having, as a shareholder, a non-individual other than an estate, a qualifying trust, or a qualifying organization, and also bars nonresident alien shareholders.Quote: “For purposes of this subchapter, the term "small business corporation" means a domestic corporation which is not an ineligible corporation and which does not-- ... (B) have as a shareholder a person (other than an estate, a trust described in subsection (c)(2), or an organization described in subsection (c)(6)) who is not an individual, (C) have a nonresident alien as a shareholder.” Pinpoint: 26 U.S.C. 1361(b)(1)(B)-(C).(source)Additional captured passages
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| IRS instruction for stock held by a disregarded LLC | IRS Form 2553 instructions attribute stock held by a disregarded single-member LLC to the LLC owner for consent purposes; the owner, not the disregarded LLC itself, must be eligible to be an S corporation shareholder.Quote: “If a single member limited liability company (LLC) owns stock in the corporation, and the LLC is treated as a disregarded entity for federal income tax purposes, enter the owner's name and address. The owner must be eligible to be an S corporation shareholder.” Pinpoint: IRS Form 2553 Instructions, Column J.(source)Additional captured passages
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| Beneficial-owner and nominee rules | The regulation repeats the non-individual and nonresident-alien shareholder bars, treats the beneficial owner rather than a nominee as shareholder, treats a partnership beneficial owner as disqualifying, and separately attributes family-member ownership through disregarded entities only for the family-counting rule.Quote: “For example, a partnership may be a nominee of S corporation stock for a person who qualifies as a shareholder of an S corporation. However, if the partnership is the beneficial owner of the stock, then the partnership is the shareholder, and the corporation does not qualify as a small business corporation.” Pinpoint: 26 CFR 1.1361-1(b)(1), (e)(1), (e)(3), (f), (g).(source)Additional captured passages
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Qualified subchapter S subsidiary definition and treatment
The statutory definition, statutory tax treatment, and regulatory exceptions are kept in separate rows.
| Federal rule | Captured text and evidence |
|---|---|
| QSub definition and conditions | A QSub is a domestic corporation that is not an ineligible corporation, 100 percent of whose stock is held by an S corporation, and for which the S corporation elects QSub treatment.Quote: “For purposes of this paragraph, the term "qualified subchapter S subsidiary" means any domestic corporation which is not an ineligible corporation (as defined in paragraph (2)), if-- (i) 100 percent of the stock of such corporation is held by the S corporation, and (ii) the S corporation elects to treat such corporation as a qualified subchapter S subsidiary.” Pinpoint: 26 U.S.C. 1361(b)(3)(B).(source)Additional captured passages
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| Federal tax treatment and termination rule | Except as regulations provide, a QSub is not treated as a separate corporation and its assets, liabilities, income, deductions, and credits are treated as those of the S corporation; if QSub status ceases, the corporation is treated as a new corporation acquiring all assets and assuming all liabilities immediately before cessation.Quote: “Except as provided in regulations prescribed by the Secretary, for purposes of this title-- (i) a corporation which is a qualified subchapter S subsidiary shall not be treated as a separate corporation, and (ii) all assets, liabilities, and items of income, deduction, and credit of a qualified subchapter S subsidiary shall be treated as assets, liabilities, and such items (as the case may be) of the S corporation.” Pinpoint: 26 U.S.C. 1361(b)(3)(A), (C), (D).(source)Additional captured passages
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| Regulatory separate-treatment exceptions | The regulation ignores separate QSub existence generally, but excepts banks, certain tax liabilities/refunds, employment taxes, specified excise taxes and related registration/credit/payment/reporting items, and information returns.Quote: “Except as otherwise provided in paragraphs (a)(3), (a)(6), (a)(7), (a)(8), and (a)(9) of this section, for Federal tax purposes-- (i) A corporation that is a QSub shall not be treated as a separate corporation; and (ii) All assets, liabilities, and items of income, deduction, and credit of a QSub shall be treated as assets, liabilities, and items of income, deduction, and credit of the S corporation.” Pinpoint: 26 CFR 1.1361-4(a)(1), (a)(3), (a)(6), (a)(7), (a)(8), (a)(9).(source)Additional captured passages
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Legend
Applies means the accepted row is applicable, in force, and marked publish-ready. Not stated after complete search and No exclusion list located are supported negative findings and appear only when the accepted row carries that result. Unknown marks a typed unknown and does not imply an affirmative or negative rule. All nine current rows are Applies; none is a supported negative or typed unknown.
Research scope
This page reports captured federal regulation, statute, and IRS instruction text on eligible-entity default classification, S corporation shareholder eligibility when stock is held by a disregarded single-member LLC, and qualified subchapter S subsidiary treatment. It gives no election advice and does not determine whether any particular structure qualifies.
The declared grain is federal. State entity-level and pass-through tax burdens are a separate dataset at Entity Tax Burden by State. The broader tax research hub is at Taxes.
Sources
Each rule row above links to its own official source. Additional captured passages remain attached to that same row rather than borrowing another row's citation. The source taxonomy is documented in the Source Registry.
- United States Code: 26 U.S.C. 1361(b)(1)(B)-(C); 26 U.S.C. 1361(b)(3)(A), (C), (D); 26 U.S.C. 1361(b)(3)(B)
- Electronic Code of Federal Regulations: 26 CFR 1.1361-1(b)(1), (e)(1), (e)(3), (f), (g)
- Electronic Code of Federal Regulations: 26 CFR 1.1361-4(a)(1), (a)(3), (a)(6), (a)(7), (a)(8), (a)(9)
- Electronic Code of Federal Regulations: 26 CFR 301.7701-2(c)(2)(i)-(vii)
- Electronic Code of Federal Regulations: 26 CFR 301.7701-3(a), (b); 26 CFR 301.7701-3(b)(1)(ii)
- IRS Form 2553 instructions: IRS Form 2553 Instructions, Column J
Private Pierce is not a law firm.
Private Pierce does not provide legal advice.
This page is not a substitute for the advice of an attorney.
Frequently asked questions
What sources does this federal classification reference use?
It uses the cited Internal Revenue Code text, Treasury regulations in the eCFR, and IRS Form 2553 instructions. Each rule row links to its own official source and identifies its pinpoint.
How are the federal rules organized?
The page separates single-owner eligible-entity classification, S corporation shareholder eligibility, and qualified subchapter S subsidiary treatment. Each section preserves three independently sourced rule variants.
Does this page decide whether a structure qualifies?
No. It reports captured federal text and its stated limits. It gives no election advice and does not determine whether a particular entity, owner, shareholder, or subsidiary qualifies.