Choosing the right business structure is one of the most important decisions you’ll make when starting a business. The entity you choose affects your taxes, liability protection, ownership flexibility, and future growth opportunities.
Common business structures include:
- Sole Proprietorship
- Partnership
- Limited Liability Company (LLC)
- Limited Liability Partnership (LLP)
- S Corporation
- C Corporation
While every business is unique, many entrepreneurs ultimately compare LLC vs S Corporation because both offer pass-through taxation and liability protection. Understanding the differences can help you choose the best business structure for your goals.
C Corporation
Although a C Corporation may be appropriate for certain larger businesses or companies seeking outside investors, it is often not the preferred choice for small businesses because of double taxation.
A C Corporation files its own federal income tax return using Form 1120 and pays income tax at the corporate level. If profits are distributed to shareholders as dividends, those dividends are also taxed on the shareholders’ individual tax returns.
This means business profits may be taxed twice:
- Once at the corporate level
- Again when dividends are distributed
While qualified dividends often receive favorable tax rates, double taxation frequently outweighs the benefits for many closely held businesses.
Sole Proprietorship
A sole proprietorship is the simplest business structure and requires little administrative effort.
Business income is reported directly on the owner’s individual tax return using Schedule C of Form 1040, eliminating the possibility of double taxation.
Advantages
- Simple to establish
- Minimal filing requirements
- Pass-through taxation
Disadvantages
The primary disadvantage is the lack of liability protection. The owner is personally responsible for business debts, lawsuits, and other legal obligations.
Limited Liability Partnership (LLP)
An LLP offers liability protection similar to an LLC but requires multiple owners.
Unlike an LLC, an LLP cannot generally have only one owner. Depending on state law and the partnership agreement, the death or withdrawal of a partner may also create operational challenges.
LLC vs S Corporation
For many small businesses, the real decision comes down to choosing between an LLC and an S Corporation.
Both entities provide:
- Limited liability protection
- Pass-through taxation
- Business income reported on the owners’ personal tax returns
However, there are important differences involving taxes, ownership rules, payroll requirements, and business flexibility.
What Is an S Corporation?
An S Corporation is a tax election available to qualifying corporations and LLCs.
Unlike a C Corporation, an S Corporation generally does not pay federal income tax. Instead, profits and losses pass through to the shareholders’ individual tax returns.
Benefits of an S Corporation
- Pass-through taxation
- Limited liability protection
- Potential savings on self-employment taxes
- Well-established corporate legal structure
To become an S Corporation, an eligible business files IRS Form 2553.
It is important to remember that an S Corporation is still legally a corporation under state law. The S-election changes only its federal tax treatment.
Converting from an S Corporation to an LLC often requires liquidating the corporation, which may trigger taxable gains.
What Is an LLC?
The Limited Liability Company (LLC) has become one of the most popular business structures for small businesses.
By default:
- Single-member LLCs are taxed as sole proprietorships.
- Multi-member LLCs are taxed as partnerships.
Like an S Corporation, an LLC generally provides pass-through taxation while protecting the owner’s personal assets.
Benefits of an LLC
- Flexible ownership
- Limited liability protection
- Fewer ownership restrictions
- Pass-through taxation
- Ability to elect S Corporation taxation later
An LLC may elect S Corporation tax treatment by filing IRS Form 2553, often without changing the legal entity.
How to Form an LLC or S Corporation
Forming an S Corporation
Creating an S Corporation generally requires:
- Filing Articles of Incorporation
- Preparing corporate organizational documents
- Issuing stock
- Filing IRS Form 2553
Licensed professionals may instead organize as a Professional Corporation (PC), depending on state law.
Forming an LLC
Forming an LLC typically involves:
- Filing Articles of Organization
- Creating an Operating Agreement
- Registering with the appropriate state agency
Certain licensed professionals may be required to form a Professional Limited Liability Company (PLLC).
LLC vs S Corporation: Key Differences
Ownership Rules
S Corporation
- Maximum of 100 shareholders
- Only U.S. individuals, certain trusts, and estates may own shares
- Only one class of stock permitted
LLC
- Unlimited number of owners
- Owners may include individuals, corporations, partnerships, trusts, and other entities
- Flexible ownership percentages
Self-Employment Taxes
One of the biggest differences between an LLC and an S Corporation involves self-employment taxes.
S Corporation
Owners working in the business must receive reasonable compensation subject to payroll taxes.
Additional profits distributed to shareholders generally are not subject to self-employment tax.
LLC
Unless the LLC elects S Corporation taxation, business income allocated to active members is generally subject to self-employment tax.
Tax Basis
Tax basis determines whether owners can deduct business losses and affects the taxation of future distributions.
S Corporation Basis Includes
- Cash contributions
- Property contributions
- Undistributed profits
- Direct shareholder loans
LLC Basis Includes
- Cash contributions
- Property contributions
- Undistributed profits
- Share of LLC liabilities
- Personally guaranteed business debt
Because LLC owners receive basis from entity liabilities, they often have higher tax basis than S Corporation shareholders.
Should You Choose an LLC or an S Corporation?
For many new businesses, forming an LLC offers significant advantages because of its flexibility, fewer ownership restrictions, and ability to later elect S Corporation taxation if it becomes beneficial. Our business advisory services are an essential part of determining the correct structure for your business to provide the most legal protection and lowest tax liabilities.
However, businesses generating consistent profits may eventually benefit from electing S Corporation tax treatment to potentially reduce self-employment taxes.
The best business structure depends on factors including:
- Expected annual profit
- Number of owners
- Future investors
- Payroll considerations
- Long-term tax planning goals
Choosing the wrong business structure can lead to higher taxes, unnecessary liability, and costly changes later. Complete CPA Solutions helps business owners evaluate LLCs, S corporations, partnerships, and corporations to determine the most tax-efficient structure for their specific situation. Contact us today to schedule a consultation.
Working with an experienced CPA Denver before forming your business can help ensure you choose the entity that provides the greatest legal protection and tax advantages for your specific situation.
