Introduction – What is Publication 5868?
Starting a new venture is an exciting milestone, but deciding how to organize your business legally and financially can feel overwhelming. Internal Revenue Service (IRS) Publication 5868, titled “Starting a new business? Choose a business structure” (Catalog Number 94402E), serves as a clear, quick-reference roadmap designed to take the guesswork out of this decision.
Following IRS catalog reviews updated as of August 26, 2026, Publication 5868 continues to stand as the agency’s primary quick-guide for business classification rules. The publication outlines how legal ownership choices dictate your federal tax responsibilities, liability risks, and annual filing duties. Understanding this guidance before launching helps you build a solid foundation and avoid costly structural changes down the road.
Who Should Read This Publication
Publication 5868 is created for anyone taking their first steps into the business world. Whether you are an independent contractor striking out on your own or a team launching a tech startup, this guide offers essential direction.
You should review this publication if you fall into any of the following categories:
- First-time entrepreneurs: Individuals turning a hobby, craft, or idea into a revenue-generating enterprise.
- Freelancers and gig workers: Self-employed professionals deciding whether to remain sole proprietors or establish an LLC.
- Business partners: Co-founders entering a commercial venture together who need to understand shared liability and tax pass-throughs.
- Growing small business owners: Existing operators considering an entity change, such as converting an LLC into an S Corporation to optimize taxes.
Key Topics Covered
Publication 5868 condenses complex tax rules into straightforward comparisons. It primarily focuses on how structure impacts day-to-day operations and year-end reporting.
The core subjects addressed in the publication include:
- Entity Classification: The fundamental types of business entities recognized across the United States.
- Ownership Rules: Limits on who can own shares or membership interests in each entity.
- Personal Liability: The degree of separation between business debts and your personal assets.
- Tax Obligations: How income is assessed, including personal income tax, corporate income tax, and self-employment tax.
Detailed Breakdown of Main Concepts
The backbone of Publication 5868 is a comparison chart that contrasts the most common business entities. Below is a detailed view of how the IRS breaks down these business models.
| Business Structure | Ownership | Liability Protection | Tax Treatment |
|---|---|---|---|
| Sole Proprietorship | One person | Unlimited personal liability | Self-employment tax; Personal income tax |
| Partnership | Two or more people | Unlimited personal liability (unless limited) | Self-employment tax (general partners); Personal income tax |
| Limited Liability Company (LLC) | One or more people | Owners are not personally liable | Self-employment tax; Personal or corporate tax options |
| C Corporation | One or more people | Owners are not personally liable | Corporate tax (entity level); Dividend tax (owner level) |
| S Corporation | 1 to 100 U.S. citizens/residents | Owners are not personally liable | Pass-through personal tax; Reasonable owner-salary rules |
| Benefit Corporation (B Corp) | One or more people | Owners are not personally liable | Corporate tax |
| Nonprofit Corporation | One or more people | Owners are not personally liable | Tax-exempt; Profits cannot be distributed to founders |
Sole Proprietorship
A sole proprietorship is the simplest, most common structure. If you start selling goods or services without filing entity paperwork with your state, you are automatically a sole proprietor. While setup is frictionless, there is no legal wall protecting your personal savings, car, or home from business debts and legal judgments.
Partnerships
When two or more individuals go into business together to share profits and losses, they form a partnership. General partners share unlimited personal liability for business obligations, meaning one partner’s actions can place another partner’s assets at risk. Profits pass directly to the partners’ individual returns, where they are subject to income tax and self-employment taxes.
Limited Liability Company (LLC)
An LLC is created under state law rather than federal tax law. It provides the legal asset shield of a corporation while offering flexible tax treatment. By default, the IRS treats a single-member LLC as a sole proprietorship and a multi-member LLC as a partnership, though owners can choose corporate tax treatment instead.
Corporations (C Corp and S Corp)
A traditional C Corporation is a completely distinct legal and tax entity. The corporation pays federal income tax on its own profits, and shareholders pay personal tax on any dividends they receive, a concept known as double taxation. An S Corporation avoids this by passing corporate profits and losses directly through to shareholders’ personal returns, provided strict ownership rules are met.
Practical Examples or Scenarios
Scenario 1: The Solo Freelance Consultant
Marcus works as an independent software consultant. He initially operates as a sole proprietor because it requires minimal paperwork. As his client contracts grow larger, he decides to form a single-member LLC to protect his personal assets from potential contract disputes while keeping his taxes simple on his individual return.
Scenario 2: The Neighborhood Cafe Partners
Lisa and Kevin want to open an artisan bakery. Because commercial leases and equipment financing carry financial exposure, they avoid a general partnership. Instead, they establish a multi-member LLC, allowing them to split profits according to their operating agreement while shielding their personal homes from business debts.
Scenario 3: The Rapid-Growth Startup
A group of founders creates an artificial intelligence platform and plans to seek venture capital funding. Because institutional investors usually require share issuances and stock classes, they establish a C Corporation. This structure allows them to reinvest earnings into research while providing total liability protection to the founding team.
How This Publication Relates to Specific Forms
Your business structure directly determines the forms you must file every year with the IRS. Publication 5868 acts as a directory pointing you toward the correct tax returns.
- Schedule C and Schedule SE (Form 1040): Used by sole proprietors and single-member LLCs to calculate net business profit and determine self-employment taxes.
- Form 1065 and Schedule K-1: Filed by partnerships and multi-member LLCs to report business income, while individual allocations pass to owners via Schedule K-1.
- Form 1120: The annual corporate income tax return filed by standard C Corporations.
- Form 1120-S: The annual information return filed by corporations that elect S Corporation status.
- Form 2553: The official election form submitted to the IRS by an eligible small business corporation or LLC seeking S Corporation status.
- Form 8832: The entity classification election form that allows an LLC to be taxed as a corporation instead of its default tax status.
Common Misunderstandings Clarified
Many new business owners hold mistaken beliefs about how IRS entity rules work. Clarifying these points early helps keep your business compliant.
One major misconception is that an LLC is a distinct federal tax classification. In reality, the IRS does not have an “LLC” tax category; an LLC is always taxed as a sole proprietorship, partnership, or corporation based on state registration and IRS elections.
Another common mistake involves S Corporation status. An S Corp is not an entity created at the state level, but rather an administrative tax status chosen through the IRS. Additionally, forming an LLC or corporation does not automatically eliminate self-employment taxes; active business owners must still pay Medicare and Social Security on their earned compensation.
Why This Publication Matters for Taxpayers
Selecting a business structure without proper research can lead to unintended tax liabilities, unexpected self-employment tax bills, and missed deductions. Publication 5868 gives you a birds-eye view so you can plan your financial strategy before earning your first dollar.
By understanding how business models operate under federal tax law, you can make informed choices with your accountant or attorney. This upfront preparation prevents disruptive structural reorganizations later and keeps you focused on growing a compliant, profitable enterprise.
Frequently Asked Questions
Can I change my business structure after I start?
Yes, businesses can change their legal structure or tax classification as they grow. For example, a sole proprietor can form an LLC, or an LLC can file Form 2553 to elect S Corporation tax treatment. However, reclassifying a business can have tax consequences, so consulting a tax professional is recommended.
Do I need an Employer Identification Number (EIN)?
Most business structures, including partnerships, corporations, and any business with employees, require a federal EIN from the IRS. Sole proprietors without employees often use their Social Security Number, but obtaining a free EIN is widely recommended for privacy and banking purposes.
What is self-employment tax?
Self-employment tax represents Social Security and Medicare taxes for individuals who work for themselves. When you are an employee, your employer pays half of these taxes and withholds the other half from your paycheck; as a business owner, you are responsible for paying the entire amount.
What is the difference between a B Corp and a Nonprofit?
A Benefit Corporation (B Corp) is a for-profit company committed to a social or environmental mission, and its profits are taxable and distributable to shareholders. A Nonprofit Corporation is organized exclusively for charitable, religious, or educational purposes, qualifies for tax-exempt status, and cannot distribute profits to private individuals.
Conclusion
Choosing the right business structure is one of the most critical decisions you will make as an entrepreneur. IRS Publication 5868 simplifies this complex choice by presenting ownership rules, personal liability protections, and tax duties in an easy-to-read format. Take the time to examine these options carefully so you can launch your business with complete confidence and total tax compliance.
