Types of Business Entities in the U.S.: Sole Proprietorship vs. LLC vs. S Corp vs. C Corp

Starting a blog, online store, freelance business, or consulting service often brings up the same questions:

“Do I need an LLC?”
“Will an S corporation save me money?”
“Does registering a business name protect my personal assets?”

The right choice depends on personal liability, taxes, ongoing costs, ownership, and plans for raising money.

This guide explains the main U.S. business structures and highlights California costs that can affect small businesses.

Sources reviewed: October 29, 2026.

1. An LLC and an S Corporation Can Work Together

An LLC is a legal business structure created under state law. S corporation status is a federal tax election available to eligible entities.

An LLC can therefore elect S corporation tax treatment while remaining an LLC under state law.

For example:

  • A single-member LLC using its default tax treatment: Business income generally appears on the owner’s federal income tax return.
  • An eligible LLC electing S corporation taxation: The business follows S corporation tax rules, including compensation requirements for an owner who works in the business.

Before comparing “LLC versus S Corp,” separate two decisions: the legal entity you form and the tax treatment you choose.

Sources: IRS — Limited Liability Company, IRS — LLC Filing as a Corporation or Partnership

2. Business Structures at a Glance

StructureOwnershipPersonal liabilityTypical federal income tax treatment
Sole proprietorshipOne individualOwner is personally responsible for business obligationsBusiness income generally reported on the owner’s return
General partnershipTwo or more ownersGeneral partners generally have personal liabilityIncome and losses generally pass through to partners
LLCOne or more membersMembers generally receive limited liability protectionDefault treatment depends on ownership; corporate taxation may be elected
Corporation taxed as a C corporationShareholdersShareholders generally receive limited liability protectionCorporation pays income tax; shareholders may also owe tax on dividends
Eligible corporation or LLC electing S corporation taxationEligible shareholders or ownersProtection comes from the underlying legal entityIncome and losses generally pass through to owners

These are general rules. State law, elections, and individual circumstances can change the details.

Sources: IRS — Business Structures, California Secretary of State — Entity Types

3. Sole Proprietorship: A Simple Starting Point

A sole proprietorship is a business owned by one individual without a separate LLC or corporation.

It can be relatively simple to start and manage, making it an option for testing a small business idea.

The main drawback is personal liability. The owner and business are not separate legal entities, so business debts or claims can affect the owner’s personal assets.

A sole proprietor may still need local business licenses, permits, or a fictitious business name filing. Operating without an LLC does not mean operating without registration requirements.

Source: U.S. Small Business Administration — Choose a Business Structure

4. Partnership: Running a Business With Other Owners

A general partnership involves two or more owners operating a business for profit.

General partners can face personal liability for partnership obligations. In California, that exposure can extend beyond the money a partner originally invested.

Before starting together, owners should document:

  • Contributions of money, property, and work
  • Profit and loss allocations
  • Authority to sign contracts and approve spending
  • Procedures when an owner leaves or dies
  • Ownership transfers and dispute resolution

Limited partnerships, or LPs, and limited liability partnerships, or LLPs, have different rules. California restricts LLP eligibility to specified professional activities and related qualifying arrangements.

Source: California Secretary of State — Entity Types

5. LLC: Liability Protection With Flexible Tax Treatment

An LLC generally provides limited liability protection and flexibility in management and taxation. It can have one owner or multiple owners.

For federal income tax purposes, the usual defaults are:

  • One member: Generally treated as a disregarded entity, with business activity reported through the owner.
  • Two or more members: Generally taxed as a partnership.
  • An available election: The LLC may choose corporate taxation and, if eligible, S corporation treatment.

Forming an LLC does not automatically reduce taxes. A single-member LLC using default taxation may have federal income tax treatment similar to a sole proprietorship while adding state taxes and administrative costs.

California LLCs must also have an operating agreement. It is maintained with the LLC’s records rather than filed with the Secretary of State.

Sources: IRS — Limited Liability Company, California Secretary of State — Entity Types

6. C Corporation: A Structure to Consider for Outside Investment

A corporation is a legal entity separate from its shareholders. Its stock structure can be useful when raising investment or transferring ownership.

Under C corporation taxation, the corporation pays income tax on its profits. If it distributes after-tax profits as dividends, shareholders may also owe tax on those dividends.

This creates the possibility of taxation at both the corporate and shareholder levels.

A corporation may fit a business with substantial investment plans, but a smaller owner-operated business should also compare corporate formalities, tax preparation, and ongoing administration.

Source: U.S. Small Business Administration — Choose a Business Structure

7. S Corporation: Compare Potential Savings With Added Costs

S corporation taxation generally allows business income and losses to pass through to shareholders’ personal returns.

Eligibility requirements include:

  • Being an eligible domestic entity
  • Having no more than 100 shareholders
  • Having only permitted shareholders
  • Generally having no nonresident alien shareholders
  • Having only one class of stock
  • Making the required election, generally through Form 2553

Tax residency and citizenship are different concepts. An owner’s eligibility should be evaluated using the applicable tax rules.

Source: IRS — S Corporations

Can an S Corporation Owner Take Distributions Without a Salary?

An owner who performs services for the business must follow reasonable compensation rules.

Calling a payment a distribution does not remove payroll tax obligations when the payment should be treated as wages. The IRS can reclassify distributions as wages.

When evaluating S corporation taxation, compare potential tax savings against:

  • Reasonable owner compensation and employment taxes
  • Payroll processing
  • Additional tax preparation and bookkeeping
  • State-level taxes and compliance costs

There is no universal profit threshold at which S corporation treatment becomes the best choice for every business.

Source: IRS — S Corporation Compensation and Medical Insurance Issues

8. California Costs Can Change the Calculation

LLCs Using Default Tax Treatment

An LLC organized or registered in California, or doing business in California, generally owes an $800 annual tax, subject to specific exceptions.

Having no profit does not automatically eliminate this obligation.

California’s temporary general first-year annual tax exemption applied to tax years beginning in 2021 through 2023. It should not be assumed to apply to an LLC formed in 2026.

Source: California Franchise Tax Board — Limited Liability Company

An additional LLC fee may apply when California-attributable total income, as defined by the FTB, reaches $250,000.

California-attributable total incomeAdditional LLC fee
Less than $250,000$0
250,000–499,999$900
500,000–999,999$2,500
1,000,000–4,999,999$6,000
$5,000,000 or more$11,790

This fee is separate from the $800 annual tax. The total-income calculation is not the same as net profit after business expenses.

Source: California FTB — Publication 3556

Businesses Taxed as S Corporations

California generally taxes S corporations at 1.5% of California taxable net income, subject to an $800 minimum franchise tax.

Newly formed or qualified corporations may qualify for a first-taxable-year minimum tax exception. Their first-year net income can still be subject to the 1.5% tax.

An existing LLC should not assume that electing S corporation taxation automatically creates a new first-year exemption. LLCs electing corporate taxation follow the applicable corporate tax filing rules.

Sources: California FTB — S Corporations, California FTB — LLC Treated as a Corporation

Formation Fees Are Only Part of the Budget

A formation service’s advertised price is not necessarily the full cost of operating the entity.

Ask for a breakdown of:

  • State formation and registration fees
  • Periodic information filings
  • Annual state taxes and additional fees
  • Local licenses and business name filings
  • Any registered agent service
  • Bookkeeping, tax preparation, and payroll
  • Appropriate business insurance

Compare the first year separately from later years.

9. Frequently Asked Questions

Do I Need an LLC to Start a Blog or Freelance Business?

An LLC is not a universal requirement. A person may operate as a sole proprietor.

The decision should consider contracts, potential claims, ownership arrangements, and the need to protect personal assets.

Does Registering a DBA Provide LLC Protection?

No. A DBA, or fictitious business name, registers a name under which the business operates. It does not create an LLC or corporation or provide the same liability protection.

Does an LLC Eliminate All Personal Liability?

No. Personal guarantees and liability for an owner’s own wrongful conduct can remain. Entity formation and insurance address different parts of business risk.

Can I Change My Structure Later?

Changes are possible, but changing a legal entity and changing its tax classification are different processes.

A change can affect taxes, contracts, assets, and state registration requirements. Review the consequences before making the switch.

Sources: SBA — Choose a Business Structure, IRS — LLC Filing as a Corporation or Partnership

10. Five Things to Prepare Before Choosing

Before meeting with a tax professional or attorney, gather:

  • The states where the business will operate and its industry
  • The number of owners and their tax residency status
  • Expected revenue and net profit
  • Potential exposure from customers, contracts, and borrowing
  • Plans for outside investment or future co-owners

These details make it easier to compare liability protection, taxes, and ongoing costs under the same assumptions.

Official Sources and Further Reading

This article provides general educational information. State requirements, industry restrictions, and tax treatment vary. Obtain advice based on your circumstances before forming an entity or making a tax election.