Choosing the right business structure is an important decision for small-business owners in the United States. Two common corporation structures are S Corporation (S Corp) and C Corporation (C Corp). While both can provide limited liability protection, they differ significantly in how they are taxed, how ownership works, and how profits are distributed.

Understanding the differences between an S Corp vs. C Corp can help business owners choose a structure that better fits their current operations and future plans.

What Is an S Corporation?

An S Corporation is a corporation that elects special federal tax treatment with the IRS. Instead of generally paying federal corporate income tax at the entity level, an S Corp's income, deductions, credits, and other tax items generally pass through to its shareholders and are reported on their individual tax returns.

S Corps are subject to specific eligibility requirements. For example, they generally cannot have more than 100 shareholders, and shareholders must meet certain requirements under federal tax law.

For many eligible small businesses, an S Corp can provide a pass-through taxation structure while maintaining corporate liability protection.

What Is a C Corporation?

A C Corporation is the standard corporate structure for federal tax purposes. Unlike an S Corp, a C Corp is generally taxed separately from its owners.

The corporation pays federal income tax on its taxable income, and shareholders may also pay tax when the corporation distributes dividends. This is commonly referred to as double taxation.

C Corps generally have fewer restrictions on ownership and can be suitable for businesses that plan to attract outside investors, issue different classes of stock, or pursue significant growth.

S Corp vs. C Corp: Key Differences

Although both structures can provide liability protection, their tax and ownership rules are different.

1. Taxation

Tax treatment is one of the biggest differences between an S Corp and a C Corp.

An S Corp generally uses pass-through taxation, meaning business income and certain other tax items pass through to shareholders. The shareholders generally report their share of the income on their personal tax returns.

A C Corp generally pays corporate income tax on its taxable income. If the corporation later distributes dividends to shareholders, those dividends can also be taxable to the shareholders.

However, the actual tax outcome depends on the company's circumstances, shareholder situation, compensation, deductions, and applicable federal and state rules.

2. Ownership Restrictions

S Corps have more restrictive ownership requirements.

Generally, an S Corp can have no more than 100 shareholders, and shareholders must meet specific eligibility requirements. Certain corporations and other entities may not be eligible shareholders.

C Corps generally have fewer restrictions. They can have an unlimited number of shareholders and can be owned by individuals, corporations, and other entities, subject to applicable rules.

This flexibility can make the C Corp structure attractive to businesses seeking outside investment.

3. Stock Classes

Another important difference is the treatment of stock.

S Corps generally can have only one class of stock, although differences in voting rights may be permitted under certain circumstances.

C Corps can generally issue multiple classes of stock, including common and preferred stock. This flexibility can be useful when raising capital from different types of investors.

4. Business Growth and Investment

The structure that works for a small business today may not be the best structure for its long-term plans.

A C Corp can be useful for businesses planning to raise substantial outside capital or pursue certain investment strategies. The ability to issue different classes of stock can provide greater flexibility when structuring investments.

An eligible small business that expects to remain closely held may consider an S Corp structure because of its pass-through tax treatment and ownership framework.

5. Self-Employment and Payroll Taxes

S Corp taxation can involve both shareholder wages and distributions. Shareholders who work for the business generally need to receive reasonable compensation for services they provide, and employment tax rules apply to wages.

After reasonable compensation, certain remaining profits may be distributed to shareholders and may receive different payroll-tax treatment.

C Corp owners who work for the company are generally treated as employees and receive compensation through payroll. Corporate profits and dividends are treated separately.

Because payroll and tax rules can be complex, business owners should work with a qualified tax professional before choosing a structure based solely on potential tax savings.

S Corp vs. C Corp: Pros and Cons

Potential Benefits of an S Corp

• Pass-through federal taxation
• Avoids corporate-level federal income tax in the typical pass-through structure
• Can work well for certain closely held businesses
• Provides corporate liability protection when properly maintained
• May provide different payroll-tax treatment for eligible shareholder-employees

Potential Limitations of an S Corp

• Strict shareholder eligibility requirements
• Generally limited to 100 shareholders
• Restrictions on stock classes
• Additional compliance requirements
• State tax treatment may differ from federal treatment

Potential Benefits of a C Corp

• Flexible ownership structure
• No general limit on the number of shareholders
• Ability to issue multiple classes of stock
• Suitable for certain businesses seeking outside investment
• Can retain earnings within the corporation for legitimate business purposes, subject to applicable tax rules

Potential Limitations of a C Corp

• Corporate-level federal income taxation
• Potential additional taxation when dividends are distributed
• More complex corporate compliance
• May involve higher administrative costs depending on the business

Which Is Better for a Small Business?

There is no single answer to whether an S Corp or C Corp is better for every small business.

An S Corp may be worth considering when the company is eligible, closely held, and the owners want a pass-through tax structure.

A C Corp may be more appropriate for businesses that want greater flexibility in ownership, plan to bring in outside investors, or expect to use multiple classes of stock.

Business owners should consider more than just the tax rate. Expected profits, owner compensation, investment plans, state taxes, administrative requirements, and long-term business goals can all affect the decision.

Can You Change From an S Corp to a C Corp?

In some circumstances, a corporation can revoke its S election and return to C Corporation tax treatment. However, changing tax status can have important tax and compliance consequences.

Before making a change, business owners should review the potential effects with a tax professional. The timing of the election or revocation and the company's specific circumstances can affect the outcome.

Frequently Asked Questions

Is an S Corp or C Corp better for a small business?

It depends on the business. An S Corp may fit certain eligible, closely held businesses seeking pass-through taxation, while a C Corp may provide greater ownership and investment flexibility.

Do S Corps pay corporate taxes?

Generally, an S Corp does not pay federal income tax at the corporate level in the same manner as a C Corp. Instead, income generally passes through to shareholders. However, certain taxes can apply at the entity level, and state rules vary.

Do C Corps have double taxation?

C Corps can be subject to taxation at both the corporate level and shareholder level when after-tax corporate profits are distributed as taxable dividends.

Can an LLC choose S Corp or C Corp taxation?

An LLC may be able to elect different federal tax classifications, including S Corporation treatment if it meets the applicable requirements. The legal entity and federal tax classification are not necessarily the same thing.

Final Thoughts

The choice between an S Corp vs. C Corp for small businesses depends on the company's ownership, tax situation, investment plans, and long-term goals. S Corps can offer pass-through taxation for eligible businesses, while C Corps provide greater flexibility for ownership and investment.

Before choosing or changing your business structure, review your specific circumstances with a qualified tax and accounting professional. A well-planned structure can help your business manage tax obligations, maintain compliance, and prepare for future growth.