Introduction: What is IRS Publication 3402?
IRS Publication 3402, titled Taxation of Limited Liability Companies, is an official informational guide published by the Internal Revenue Service. It provides comprehensive guidance on how Limited Liability Companies (LLCs) are classified, operated, and taxed under federal tax law.
The Limited Liability Company is one of the most popular business structures in the United States because it combines the personal liability protection of a corporation with the operational flexibility and pass-through taxation of a partnership or sole proprietorship. However, the federal tax code does not have a separate statutory tax category called “LLC.” For federal income tax purposes, an LLC is a chameleon—it must be classified and taxed as a sole proprietorship, a partnership, or a corporation.
Publication 3402 explains this classification system in plain language. It details the default tax classifications for single-member and multi-member LLCs, explains how to elect alternate corporate tax treatment, outlines self-employment tax rules for LLC owners, and explains how capital contributions, member basis, and distributions are treated under federal law.
Who Should Read This Publication?
Publication 3402 is essential reading for small business owners, freelancers, and professional advisors navigating the tax implications of an LLC. You should consult this publication if you are:
- New and Aspiring Business Owners: Entrepreneurs forming an LLC who need to decide which federal tax classification fits their business model best.
- Single-Member LLC Owners (Freelancers and Contractors): Solo business owners who need to understand how “disregarded entity” status affects their personal Form 1040 and self-employment taxes.
- Multi-Member LLC Partners: Co-owners of an LLC who must navigate Form 1065 partnership returns, capital accounts, and annual Schedule K-1 forms.
- Business Owners Exploring S Corp Status: LLC members evaluating whether electing S Corporation status can reduce their self-employment tax burden.
- CPAs, Bookkeepers, and Business Attorneys: Tax professionals advising clients on “check-the-box” elections, debt allocations, and member basis limitations.
Key Topics Covered in Publication 3402
Publication 3402 covers the fundamental tax rules governing limited liability companies. The major subject areas include:
- Default Tax Classifications: How the IRS automatically classifies single-member and multi-member LLCs under federal regulations.
- The “Check-the-Box” Rules: How an LLC can elect to be taxed as a C Corporation or S Corporation using IRS election forms.
- Self-Employment Tax (SECA) Obligations: How owners calculate and pay Social Security and Medicare taxes on their share of LLC profits.
- Member Basis and Capital Contributions: The tax treatment of transferring cash or property into an LLC and tracking tax basis to take loss deductions.
- Distributions and Dispositions: The tax consequences of withdrawing cash, distributing property, or selling an LLC ownership interest.
- Employment Taxes for Single-Member LLCs: The special rule treating single-member LLCs as separate legal entities for employee payroll taxes.
Detailed Breakdown of Main Concepts
1. The Chameleon Entity: Default Federal Classifications
Because an LLC is formed under state law rather than federal tax law, the IRS assigns default tax classifications based on the number of owners (called “members”). Under the federal “check-the-box” regulations, an LLC does not need to file paperwork to receive its default status:
- Single-Member LLC: An LLC with only one owner is automatically classified as a disregarded entity. The IRS ignores the corporate entity for income tax purposes, and the business is taxed as a sole proprietorship. All income and expenses are reported directly on the owner’s individual Form 1040 (Schedule C, Schedule E, or Schedule F).
- Multi-Member LLC: An LLC with two or more owners is automatically classified as a partnership. The LLC files an annual information return on Form 1065, and net profits and losses pass through to the members, who report their share on Schedule E via Schedule K-1.
2. Electing Corporate Tax Status (Form 8832 and Form 2553)
An LLC is not locked into its default tax status. Publication 3402 explains that an LLC can elect an alternate tax classification if it benefits the owners financially.
An LLC can elect to be taxed as a traditional C Corporation by filing Form 8832 (Entity Classification Election). Under C Corp status, the business pays corporate income taxes on its profits, and owners pay personal taxes on distributed dividends. Alternatively, an LLC can elect to be taxed as an S Corporation by filing Form 2553. Under S Corp status, profits continue to pass through to the owners without corporate-level tax, but owners who actively work in the business must receive “reasonable compensation” as W-2 wages, allowing remaining profits to be distributed free of self-employment tax.
3. Self-Employment Tax Rules for LLC Owners
A frequent surprise for new entrepreneurs is discovering that LLC profits are generally subject to the 15.3 percent Self-Employment Tax (SECA), which covers Social Security and Medicare.
For a single-member LLC taxed as a sole proprietorship, the owner must pay self-employment tax on 100 percent of the net operating profit reported on Schedule C, calculated using Schedule SE. For multi-member LLCs taxed as partnerships, members who actively manage or participate in the business must pay self-employment tax on their full distributive share of ordinary partnership income, as well as on any “guaranteed payments” received for services rendered to the LLC.
4. Capital Contributions and Tracking Member Basis
When an owner contributes cash, inventory, or equipment to an LLC in exchange for an ownership interest, the transaction is generally tax-free under Internal Revenue Code Section 721. The member does not recognize a gain or loss on the transfer.
Publication 3402 emphasizes the importance of tracking a member’s “outside basis” (their financial investment in the LLC). A member’s basis increases when they contribute capital, when the LLC earns taxable income, or when the LLC assumes debt. Basis decreases when the LLC distributes cash or property to the member, when the LLC incurs losses, or when LLC debt is paid down. Tracking basis is essential because a member cannot deduct business losses on their personal tax return that exceed their adjusted tax basis in the LLC.
5. Distributions: Tax-Free Draws vs. Taxable Gains
When an LLC operating as a partnership or sole proprietorship distributes profits to its members, those cash distributions are generally tax-free. Because the members are taxed on the LLC’s profits in the year they are earned—regardless of whether the cash is distributed or retained in the business bank account—taking cash out does not trigger a second tax.
However, Publication 3402 outlines an important exception: if an LLC distributes cash that exceeds the member’s adjusted tax basis in the company, the excess distribution is treated as a taxable capital gain. Non-cash property distributions generally carry over the LLC’s tax basis, postponing taxation until the member eventually sells the distributed property.
6. Employment Taxes: The Single-Member LLC Exception
While the IRS treats a single-member LLC as a disregarded entity for income tax purposes, federal law enforces a completely different rule for employment taxes.
Under Treasury regulations, a single-member LLC is treated as a separate legal entity for employment taxes and certain excise taxes. If a single-member LLC hires employees, the LLC must obtain its own Employer Identification Number (EIN) under the LLC’s legal business name. The business must withhold federal income tax, Social Security, and Medicare, and file quarterly payroll returns on Form 941 under the LLC’s name and EIN, rather than under the owner’s personal name or Social Security Number.
Practical Examples and Scenarios
Scenario 1: Single-Member LLC as a Disregarded Entity
Alex launches a freelance digital marketing consulting practice and forms a single-member LLC under state law for personal liability protection. During the year, the LLC earns $85,000 in gross revenue and incurs $15,000 in allowable business expenses, leaving a net profit of $70,000.
Under Publication 3402, Alex does not file a separate corporate federal tax return. The LLC is treated as a disregarded entity. Alex reports the $85,000 revenue and $15,000 expenses directly on Schedule C of Form 1040. Alex pays ordinary income tax and calculates self-employment tax on the $70,000 net profit using Schedule SE, fulfilling all federal income tax duties.
Scenario 2: Multi-Member LLC Distributing Profits
Maria and David form an equal 50/50 multi-member LLC to operate a neighborhood retail store. In its first year, the LLC earns $100,000 in net profit. The partners decide to withdraw $30,000 each in cash distributions and leave the remaining $40,000 in the business bank account for future inventory expansion.
Under default partnership rules, the LLC files Form 1065. Even though each partner only took $30,000 in cash, each partner receives a Schedule K-1 reporting their 50 percent share of total profit ($50,000). Both Maria and David must report $50,000 of taxable income on Schedule E of their personal returns. The $30,000 cash withdrawals reduce their tax basis but are not taxed a second time.
Comparison: Federal Tax Classifications for LLCs
| Tax Classification | How It Is Selected | Federal Return Filed | How Profits Are Taxed | Self-Employment Tax Impact |
|---|---|---|---|---|
| Disregarded Entity (Sole Proprietor) | Automatic default for 1-member LLC | Form 1040 (Schedule C) | Passes directly to individual Form 1040 | Full net profit subject to 15.3% SECA |
| Partnership | Automatic default for 2+ member LLC | Form 1065 (Schedule K-1) | Passes to partners via Schedule K-1 | Active partners pay SECA on ordinary share |
| S Corporation | Elective (File Form 2553) | Form 1120-S (Schedule K-1) | Passes through after owner W-2 salary | SECA avoided on distributed non-wage profit |
| C Corporation | Elective (File Form 8832) | Form 1120 | Taxed at corporate level; dividends taxed | No SECA; subject to corporate double-tax |
How This Publication Relates to Specific Forms and Documents
Publication 3402 coordinates directly with several essential federal tax forms and election documents:
- Form 1040 (Schedule C, Schedule E, Schedule SE): The individual schedules used by single-member LLC owners to report business profit, loss, and self-employment tax.
- Form 1065 and Schedule K-1: The partnership information return and partner reporting slips used by default multi-member LLCs.
- Form 8832 (Entity Classification Election): The “check-the-box” form filed to elect taxation as a traditional C Corporation or to change an existing election.
- Form 2553 (Election by a Small Business Corporation): Filed by an LLC to elect S Corporation pass-through tax status.
- Forms 1120 and 1120-S: Corporate tax returns filed annually if the LLC elects C Corp or S Corp tax status.
- Forms 941 and 940: Federal quarterly and annual payroll returns that single-member LLCs must file under the LLC’s separate name and EIN if they have employees.
Common Misunderstandings Clarified
Because the LLC is a hybrid legal structure, common myths frequently lead entrepreneurs to make improper filings:
- “An LLC is a separate federal tax classification.” The IRS does not have an LLC tax bracket or return. An LLC is a state-level legal entity that must be taxed as a sole proprietorship, partnership, C corporation, or S corporation.
- “Forming an LLC automatically lowers your income tax.” By default, an LLC is taxed identically to an unincorporated sole proprietorship or partnership. The LLC provides legal liability protection, but tax savings generally require specific operational strategies or an S Corporation election.
- “Single-member LLC owners can receive W-2 paychecks from their business.” If an LLC is taxed as a disregarded entity or partnership, the owner is legally considered self-employed and cannot be treated as a W-2 employee. Owners take personal draws or guaranteed payments.
- “A single-member LLC can use the owner’s personal Social Security Number for employees.” While an SMLLC uses the owner’s tax ID for income tax reporting, federal regulations strictly require an SMLLC with employees to obtain an independent EIN for payroll tax reporting.
Why This Publication Matters for Taxpayers & Business Owners
For entrepreneurs, choosing to operate as an LLC provides critical legal asset protection, shielding personal homes and savings from commercial lawsuits and business debts. However, failing to understand how the IRS taxes an LLC can lead to painful financial surprises.
Publication 3402 matters because it gives business owners the strategic blueprint needed to manage their tax liabilities. It helps founders avoid surprise self-employment tax bills, guides growing businesses on when to elect S Corporation status to save thousands in payroll taxes, and ensures that single-member employers comply with federal employment tax rules, protecting their businesses from severe IRS penalties.
Frequently Asked Questions
How is a single-member LLC taxed by default?
A single-member LLC is automatically taxed as a “disregarded entity,” meaning the IRS treats it as a sole proprietorship. All profits and expenses are reported directly on the owner’s personal Form 1040 (Schedule C).
Can an LLC be taxed as an S Corporation?
Yes. An eligible LLC can elect to be taxed as an S Corporation by submitting Form 2553 to the IRS, allowing owners who work in the business to take a reasonable W-2 salary and receive remaining profits as distributions free from self-employment tax.
Do LLC members have to pay self-employment tax?
Yes. Owners of single-member LLCs and active partners in multi-member LLCs must pay the 15.3 percent self-employment tax (Social Security and Medicare) on their net business earnings.
Does a single-member LLC need its own Employer Identification Number (EIN)?
If the single-member LLC has employees or must pay excise taxes, obtaining an EIN is legally mandatory. Even without employees, most commercial banks require an EIN to open an LLC business bank account.
Can a married couple own an LLC as a disregarded entity?
In community property states, an LLC owned solely by a married couple can elect to be treated as a disregarded entity (Qualified Joint Venture). In non-community property states, a two-member LLC owned by spouses is classified as a partnership by default.
Can an LLC deduct business losses if the owner has zero tax basis?
No. Under federal tax law, an LLC member cannot deduct business losses on their personal tax return that exceed their adjusted tax basis in the company. Excess losses are suspended until the member increases their basis.
Conclusion: Key Takeaways
IRS Publication 3402 provides the foundational principles for navigating the federal taxation of Limited Liability Companies. When structuring or operating an LLC, keep these essential points in mind:
- The IRS taxes LLCs under existing classifications: single-member LLCs are disregarded entities by default, while multi-member LLCs are partnerships.
- An LLC can elect corporate tax treatment as a C Corporation (Form 8832) or an S Corporation (Form 2553).
- Net business earnings from default LLCs are subject to the 15.3 percent self-employment tax.
- Members must track their outside tax basis to ensure business losses are legally deductible.
- Single-member LLCs with employees must obtain a separate EIN and file employment taxes under the LLC’s name and tax number.
