How to Choose a Business Structure: 2026 Guide

This guide covers every major entity type, compares them, and walks you through a step-by-step decision framework so you can match the right structure to your situation. Inc Authority has helped more than 4 million business owners work through this decision, and the guidance below reflects what actually matters when you’re choosing.

What Is a Business Structure and Why Does It Matter?

A business structure, also called a business entity type, is the legal framework that defines how your business is owned, taxed, and held responsible for its debts.

The structure you choose has three direct consequences. First, it determines your personal liability exposure. Some structures treat you and your business as the same legal entity. This leaves your personal savings, home, and assets fully exposed to business debts and lawsuits. Others create a legal wall between you and the business. Second, it determines how your income is taxed: whether profit flows through to your personal return, gets taxed at the entity level, or both. Third, it determines your ongoing compliance burden: how many annual filings, meetings, and records you need to keep the entity in good standing.

The SBA explicitly recommends selecting your business structure before you register. The structure determines which registration forms you file, which tax elections are available, and which licenses or permits may apply. Choosing deliberately before you register, open accounts, or sign contracts is the single highest-leverage decision you’ll make in the early life of your business.

Types of Business Structures: The Core Options Explained

If you’ve searched “how many types of business structures are there” and gotten different answers, here’s why the count varies.

• Four types: Groups S corporations and C corporations under a single “corporation” category and omits LP and LLP entirely.
• Five types: Separates S corp and C corp but still leaves out LP and LLP.
• Seven or more: Includes LP, LLP, and sometimes nonprofit or cooperative structures alongside the five core types.

The IRS and SBA recognize five core types: sole proprietorship, general partnership, LLC, S corporation, and C corporation. This guide covers those five plus LP and LLP.

The main types are sole proprietorship (one owner, no formal filing, no liability protection), general partnership (two or more owners, automatic formation, shared personal liability), limited partnership (general partner plus passive investors), limited liability partnership (all partners shielded from each other’s negligence), LLC (state filing required, personal asset protection, flexible tax treatment), S corporation (a tax election layered onto an LLC or corporation, pass-through taxation, strict eligibility rules), and C corporation (separate taxable entity, no ownership restrictions, the default choice for outside investors).

Sole Proprietorship

A sole proprietorship is the default business structure. You become one the moment you start doing business as an individual without filing a formal entity. You and the business are the same legal entity. This means your personal savings, home, and other assets are fully exposed to any business debt or lawsuit. Income reports on Schedule C of your Form 1040, and you pay self-employment tax on 100% of net profit. There’s no paperwork to form one, but there’s also no shield protecting you if something goes wrong.

General Partnership

A general partnership forms automatically when two or more people go into business together without registering a formal entity. Every partner carries personal liability for all business debts, including debts and legal judgments created by the other partners. Joint and several liability means a creditor can pursue any one partner for the full amount owed, regardless of who caused the debt. Income passes through to each partner’s personal return on Schedule K-1. Most states don’t require a written partnership agreement, but operating without one is a significant risk when disagreements arise.

Limited Partnership (LP) and Limited Liability Partnership (LLP)

Both structures require a state filing, unlike a general partnership.

An LP has at least one general partner with unlimited personal liability and one or more limited partners whose exposure is capped at their investment. Limited partners contribute capital but don’t manage day-to-day operations.

An LLP protects all partners from personal liability for each other’s negligence or misconduct. If your LLP partner gets sued for malpractice, your personal assets stay out of reach. You do remain personally liable for your own actions. LLPs are common among law firms, accounting practices, and medical groups.

Limited Liability Company (LLC)

An LLC combines the liability protection of a corporation with the tax simplicity of a partnership. Your personal assets are shielded from business debts and lawsuits, as long as you maintain the LLC properly. By default, a single-member LLC is taxed like a sole proprietorship and a multi-member LLC is taxed like a partnership. You can also elect S corp or C corp tax treatment for more planning flexibility. Forming an LLC requires filing articles of organization with your state and paying a formation fee, typically $50 to $500 depending on where you operate. Most states also require a registered agent and an annual or biennial report.

S Corporation

An S corporation is a tax election, not a standalone entity type. You form a corporation or LLC first, then file IRS Form 2553 within 75 days of the start of the tax year you want the election to take effect. Income passes through to shareholders’ personal returns, avoiding entity-level federal tax. The core benefit: shareholders who work in the business pay payroll taxes only on their salary, not on profit distributions above that salary. Eligibility is strict: no more than 100 shareholders, all must be U.S. citizens or permanent residents, and the entity can issue only one class of stock.

C Corporation

A C corporation is the default corporate structure and the only entity type with no restrictions on shareholder count or type. It pays corporate income tax at the current 21% rate. When the corporation distributes after-tax profits to shareholders as dividends, shareholders pay personal income tax on those dividends. This means the same dollar is taxed twice before it reaches an owner’s pocket. Many C corps reinvest profits rather than distribute them, which defers the second layer. The C corp’s ability to issue multiple classes of stock and accept any investor makes it the structure most venture capital firms and institutional investors require.

Business Structure Comparison Table

Formation costs vary by state and change over time. Always confirm the current fee with your state’s Secretary of State office. State filing fees are set by the government and stay the same whether you file yourself or use a formation service. A formation service charges a separate service fee on top of that state fee.

A few things the table won’t tell you. “Liability protection” is not a guarantee. Courts can pierce the corporate veil and hold owners personally liable if the business is run carelessly. Commingling personal and business funds is the most common trigger. The S corp column says N/A for possible tax elections because S corp status is itself a tax election layered on top of an LLC or corporation. The underlying state entity still exists. “Medium” compliance for an LLC is far lighter than what a C corp demands, but more involved than a sole proprietorship with no annual paperwork.

How Business Structure Affects Your Taxes

Most of the real-money differences between structures come down to three concepts: pass-through taxation, self-employment tax, and double taxation.

Pass-through taxation means the business itself pays no federal income tax. Profit flows directly to each owner’s personal return, taxed at that owner’s individual rate. Sole proprietorships, general partnerships, LLPs, LPs, LLCs (by default), and S corporations all use pass-through treatment.

Self-employment tax is where pass-through treatment gets expensive. The rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare. Sole proprietors and LLC members taxed as partnerships pay this on 100% of net profit. The Social Security portion applies only up to the annual wage base: $168,600 for 2024 and $176,100 for 2025. The Medicare portion applies to all net earnings with no cap. An additional 0.9% Medicare surtax applies above certain income thresholds depending on filing status. Verify the current wage base at IRS.gov before you file.

This is where the S corporation election changes the math. An S corp owner-employee pays payroll taxes only on their salary, not on profit distributions above it. If your business earns $150,000 and you pay yourself a $70,000 salary, you owe payroll taxes on $70,000, not $150,000. That split can meaningfully reduce your tax bill once profit margins are strong enough to justify running payroll.

Double taxation is the C corporation’s defining trade-off. A C corp pays 21% federal income tax on profits. Shareholders then pay personal income tax on dividends distributed from those already-taxed profits. For startups that expect to reinvest for years before distributing anything, double taxation is often theoretical rather than immediate, but worth understanding before you choose the structure.

Here’s how the three scenarios play out in practice.

• Sole proprietor or LLC (default tax): All net profit flows to your Schedule C or K-1 and is subject to both income tax and self-employment tax.
• LLC with S corp election: Profit splits between salary (subject to payroll tax) and distributions above that salary (not subject to self-employment tax). The IRS requires the salary be a genuine market-rate amount: you can’t pay yourself $1 to avoid payroll taxes.
• C corporation: The entity pays tax first at 21%; shareholders pay again on dividends. Retained earnings aren’t taxed at the shareholder level until distributed.

Tax rules change, and your effective rate depends on your total income, deductions, and state tax situation. Always verify current figures at IRS.gov.

How to Choose the Right Business Structure: a Step-by-Step Decision Framework

Work through these five steps in order.

1. Count your owners
2. Assess your liability exposure
3. Decide how you want to be taxed
4. Consider your growth and fundraising plans
5. Factor in your state’s rules and costs

Step 1: Count Your Owners

If you’re the only owner, your realistic options are sole proprietorship, single-member LLC, or corporation. Add a second owner and your options expand to multi-member LLC, general partnership, LP, LLP, or C corporation. S corps cap at 100 shareholders, all of whom must be U.S. citizens or permanent residents. If your co-owner is a foreign national or you plan to bring in more than 100 investors, S corp is off the table.

Step 2: Assess Your Liability Exposure

If a customer sues your business tomorrow, can you afford to lose your home, savings, or personal assets? If the answer is no, eliminate sole proprietorship and general partnership immediately: both offer zero liability protection. LLC, S corp, and C corp all shield your personal assets, provided you maintain the entity properly.

Step 3: Decide How You Want to Be Taxed

• Keep it simple with pass-through taxation. An LLC is your default. All profit flows to your personal return, subject to income tax and self-employment tax.
• Reduce self-employment tax on strong profits. An S corp election lets you split income between a salary (subject to payroll tax) and distributions (not subject to self-employment tax). This only makes financial sense once net profit is high enough that the tax savings outweigh the cost of running payroll, typically around $40,000–$50,000 annually.
• Reinvest profits or attract outside investors. A C corp fits this model better than a pass-through entity. You pay corporate tax on retained earnings, but shareholders don’t owe personal tax until profits are distributed.

Step 4: Consider Your Growth and Fundraising Plans

If venture capital or institutional investment is part of your roadmap, you almost certainly need a C corporation. Most VC firms and accelerators require it because a C corp can issue multiple classes of stock, has no shareholder restrictions, and supports employee stock option plans. If you’re building a stable small business or professional practice with no plans to raise outside equity, an LLC or S corp will serve you better and keep your compliance burden lighter.

Step 5: Factor in Your State’s Rules and Costs

Formation fees, annual report requirements, and franchise taxes vary significantly by state. California charges LLCs an $800 annual minimum franchise tax regardless of revenue. Delaware’s business-friendly court system and flexible corporate law make it the go-to state for C corps seeking investor capital. Wyoming and New Mexico are known for low-cost LLC formation with minimal ongoing fees. Check your state’s Secretary of State website to confirm current fees before you file.

Best Business Structure by Scenario

Best Structure for a Freelancer or Solo Consultant

A sole proprietorship is the simplest option, but an LLC adds meaningful liability protection for minimal cost and complexity. If net profit consistently exceeds $40,000–$50,000 annually, an S corp election can reduce self-employment taxes enough to justify running payroll. For most solo operators, the LLC is the right starting point.

Best Structure for a Two-Person or Family-Owned Business

A multi-member LLC with a written operating agreement is the standard choice. It eliminates the joint-and-several liability of a general partnership and allows flexible profit-sharing without corporate-level compliance. Without a formal entity filing, two people going into business together automatically become a general partnership. This exposes each partner personally to the other’s business debts and legal judgments.

Best Structure for a High-Risk Business (Construction, Food Service, Healthcare)

Any business where injury, property damage, or large claims are realistic risks should prioritize liability protection: LLC or corporation. Neither structure, however, protects you from liability for your own negligent actions.

Best Structure for a Licensed Professional Practice (Law, Medicine, Accounting)

Many states bar licensed professionals from forming a standard LLC or corporation. Licensing boards typically require a professional LLC (PLLC) or professional corporation (PC), which restrict ownership to licensed practitioners. Law and accounting firms often use an LLP instead. Check your state’s licensing board requirements before you file anything.

Best Structure for a Startup Seeking Outside Investment

A C corporation, typically formed in Delaware, is the near-universal choice for venture-backed startups. It can issue multiple classes of stock, imposes no restrictions on shareholders, and supports employee stock option plans. An LLC can technically accept outside investment, but the structure creates complications with carried interest calculations and option grants that most institutional investors prefer to avoid.

Startup Costs and Ongoing Compliance by Entity Type

• Sole proprietorship: Costs nothing to form. If you operate under a name other than your own, you’ll likely need a DBA registration, typically $10–$50. No annual report required in most states.
• General partnership: Also $0 to form, with a DBA registration if needed. No annual report required in most states. The hidden cost is operating without a written partnership agreement. Disputes over profit splits or decision-making authority get expensive fast when there’s nothing in writing.
• LLC: State filing fees range from $50 to $500 (Kentucky charges $40; Massachusetts charges $500). Most states require an annual or biennial report with a filing fee of $25–$300. A registered agent is required in virtually every state. An operating agreement isn’t required by law in most states, but operating without one creates unnecessary risk.
• S corporation: Formation cost mirrors a corporation in your state, plus IRS Form 2553 (no federal filing fee). You must run payroll for owner-employees, file annual reports, and maintain corporate minutes.
• C corporation: State filing fees run $50–$500 or more. Annual reports, formal board meetings, shareholder meetings, and corporate minutes are all required: the highest compliance burden of any entity type.

A formation service charges a separate service fee on top of the required state filing fee; the state fee itself is fixed regardless of how you file. Inc Authority handles state formation filings for LLCs and corporations, waiving its service charges so you only pay what the state requires.

How to Change Your Business Structure Later

Changing your business structure is possible, but timing and tax consequences matter.

Sole proprietorship or partnership to LLC. File articles of organization with your state, get a new EIN from the IRS, and transfer existing business assets and contracts into the new entity. No special IRS election is required to keep default LLC tax treatment.

LLC to S corporation (tax election). The LLC stays unchanged under state law: only the federal tax treatment changes. File IRS Form 2553 within 75 days of the start of the tax year you want the election to apply. Once the election takes effect, every owner-employee must run payroll and pay themselves a reasonable market-rate salary.

LLC to C corporation. This is the most complex conversion. It requires a formal conversion or merger under state law, a new EIN, and entirely new governing documents. Converting back from a C corp to an LLC or S corp can trigger recognition of built-in gains. The IRS may tax appreciation that built up while the business operated as a C corp. That exposure is one of the clearest reasons to choose the right structure from day one.

Frequently Asked Questions About Choosing a Business Structure

What Are the 4 Types of Business Structure?

The four most commonly cited structures are sole proprietorship, partnership, corporation, and LLC. This framework groups S corps and C corps under “corporation” and omits LP and LLP. The count varies by source depending on which entity types are included.

What Are the 5 Types of Business Structures?

The five core types recognized by the IRS and SBA are sole proprietorship, general partnership, LLC, S corporation, and C corporation. This count excludes LP and LLP.

What Are the 7 Types of Business Structures?

The seven-type count adds LP and LLP to the five core structures. Some sources push higher by including nonprofits and cooperatives. The five-core-plus-LP-and-LLP framework covers the full range relevant to most for-profit small businesses.

What Is the Difference Between an LLC and a Sole Proprietorship?

An LLC is a separate legal entity; a sole proprietorship is not. A creditor who wins a judgment against your LLC can generally only reach business assets, not your personal savings or home. Both default to pass-through taxation, so the primary difference is liability protection, not tax treatment.

What Is Pass-Through Taxation, and Which Business Structures Use It?

Pass-through taxation means the business pays no federal income tax. Profit flows to each owner’s personal return and is taxed at their individual rate. Sole proprietorships, general partnerships, LPs, LLPs, LLCs (by default), and S corporations all use pass-through treatment. C corporations are the primary exception.

What Is Double Taxation, and Which Entity Types Are Subject to It?

Double taxation applies only to C corporations. The corporation pays federal income tax at 21% on profits. Shareholders then pay personal income tax on dividends distributed from those already-taxed profits. All other standard structures avoid this through pass-through treatment.

What Is Self-Employment Tax, and How Does It Apply to Sole Proprietors and LLC Members?

Sole proprietors and LLC members taxed as partnerships pay 15.3% self-employment tax on 100% of net profit: 12.4% for Social Security (up to the annual wage base: $168,600 in 2024, $176,100 in 2025) and 2.9% for Medicare on all earnings. S corp owner-employees pay payroll taxes only on their salary, not on distributions above it. Verify the current wage base at IRS.gov before filing.

How Does an S Corporation Election Work, and Who Qualifies?

File IRS Form 2553 within 75 days of the start of the tax year you want the election to apply. The underlying LLC or corporation stays unchanged under state law; only the federal tax treatment changes. To qualify: no more than 100 shareholders, all must be U.S. citizens or permanent residents, and the entity may issue only one class of stock.

What Are the Ongoing Compliance Requirements for an LLC Vs. a Corporation?

An LLC typically requires an annual or biennial state report, a registered agent, and an operating agreement. A corporation requires all of that plus formal board and shareholder meetings, corporate minutes, and payroll for owner-employees if it’s an S corp. A corporation’s compliance burden is substantially heavier than an LLC’s.

How Much Does It Cost to Form an LLC Vs. a Corporation?

Both typically cost $50–$500 in state filing fees. The practical difference is ongoing: corporations require payroll (for S corps), formal meeting records, and more complex annual filings. A formation service charges a service fee on top of the state filing fee regardless of entity type.

Can You Change Your Business Structure After You’ve Already Formed One?

Yes, but timing and tax consequences matter. Converting a sole proprietorship or partnership to an LLC is relatively straightforward. Adding an S corp election requires filing Form 2553 within 75 days of the relevant tax year. Converting an LLC to a C corp is the most complex change and can require professional guidance. Converting back from a C corp can trigger built-in gains taxes.

Which Business Structure Should I Choose?

Work through five questions in order. How many owners does the business have? How much personal liability risk can you absorb? How do you want profits taxed? Do you plan to raise outside investment? What does your state charge for formation and annual compliance? The answers will eliminate most options and point clearly to one or two structures.

What Business Structure Is Best for a Freelancer or Solo Consultant?

An LLC is the practical starting point: it adds liability protection over a sole proprietorship with minimal added complexity. If annual net profit consistently exceeds $40,000–$50,000, an S corp election can reduce self-employment taxes enough to justify running payroll.

What Business Structure Is Best for a Startup that Wants to Raise Venture Capital?

A Delaware C corporation. Most VC firms and accelerators require it because it supports multiple stock classes, has no shareholder restrictions, and is compatible with employee stock option plans.

What Business Structure Is Best for a Family-Owned Business?

A multi-member LLC with a written operating agreement. It eliminates the joint-and-several liability of a default general partnership, allows flexible profit-sharing, and carries lighter compliance requirements than a corporation.

Do I Need a Lawyer to Choose a Business Structure?

You’re not legally required to hire one. Many business owners use an online formation service to handle state filings. If your situation involves multiple owners, complex ownership arrangements, professional licensing requirements, or significant personal assets at risk, a conversation with a business attorney before you file is worth the cost.

Does My Business Structure Affect My Ability to Get a Business Loan?

Yes. Lenders typically view LLCs and corporations as more creditworthy than sole proprietorships because they have a separate legal identity, a business credit profile, and formal governing documents. Sole proprietors often rely on personal credit for business financing. Forming an LLC or corporation before applying keeps personal and business finances cleanly separated and strengthens your application.

Whether you’re ready to form an LLC, incorporate, or want to explore your options further, Inc Authority’s FREE formation services handle the paperwork so you can focus on building your business. You only pay the required state fees, and you can register in 5 minutes or less.