C Corp vs. S Corp: A Practical Comparison

Selecting between C corporation and S corporation status isn't simply a tax decision. The choice can affect profit taxation, how owners are compensated, the ability to attract investors and the long-term financial strategy of the business. Although neither structure is inherently better than the other, understanding the key differences and evaluating them in the context of your company's goals can help determine which option is the better fit.

C Corporations

Basics

A C corp is a federal tax classification for a business that's taxed separately from its owners. Corporations offer significant legal protections, and C corps are favored by companies planning to reinvest profits or eventually go public. Unlike S corps or LLCs, a C corp pays corporate income tax on its profits. If dividends are paid, shareholders are taxed on dividends, usually at qualified dividend rates, creating the possibility of double taxation. Key features include:

• Separate legal entity from its owners.
• Unlimited number of shareholders (unlike the 100-shareholder S corp limit).
• Ability to issue multiple classes of stock.
• Profits taxed at the corporate level (flat 21% federal rate).
• Corporate losses don't pass through to shareholders but are maintained within the corporation and carried forward as net operating losses (NOLs) to offset taxable income in future years. For tax years beginning after Dec. 31, 2020, NOLs generally may offset only 80% of taxable income.

Advantages

• Limited liability protection for shareholders.
• Easier access to capital through stock issuance.
• Perpetual existence (business continues even if shareholders change).
• Greater credibility with vendors, customers and lenders.
• Eligibility for certain tax deductions not available to pass-through entities (e.g., fringe benefits).

Potential Drawbacks

• Subject to double taxation (corporate tax + tax on dividends).
• More complex administrative and regulatory requirements.
• Higher compliance costs (e.g., annual meetings, board resolutions, tax filings).

Other Considerations

Favorable Section 1202 gain exclusion: One of the most attractive tax incentives for C corps is the Section 1202 gain exclusion. This provision allows non-corporate shareholders to exclude up to 100% of the gain from the sale of qualified small business stock (QSBS) if certain conditions are met, including a three- to five-year holding period and original issuance of the stock. The exclusion applies to gains up to $15 million or 10 times the shareholder's basis, whichever is greater. To qualify, the C corp must have gross assets of $75 million or less at the time of issuance and operate an active business in a qualified trade or business. Section 1202 can significantly reduce or eliminate capital gains tax on a successful exit, making the C corp structure particularly appealing to founders and early investors.

Potential Section 1244 loss treatment: Section 1244 stock allows individual shareholders of a qualifying C corp or S corp to treat losses from the sale, exchange or worthlessness of the stock as ordinary losses rather than capital losses. This may allow the shareholder to offset ordinary income, subject to annual limits of $50,000, or $100,000 for married taxpayers filing jointly. The stock must generally be originally issued for money or property - not services - and meet other Section 1244 requirements. The benefit applies to the shareholder and doesn't provide a direct tax deduction to the corporation. Section 1202 may provide an upside gain exclusion for separately qualifying C corp stock, while Section 1244 may provide downside ordinary-loss treatment, but each provision has its own eligibility rules and must be tested independently.

While a C corp is often not the first choice for many closely held businesses, companies that were formed as C corps frequently remain that way. Some owners don't see a compelling reason to change, while others determine that the tax and administrative consequences of conversion outweigh the potential benefits.

S Corporations

Basics

To qualify as an S corp under IRC §1361(b), a business must first elect to be treated as one. This election must be made by all shareholders and submitted within the appropriate time frame (generally within two months and 15 days after the beginning of the tax year the election is to take effect). Once elected, a business must:

• Be a domestic corporation.
• Have only allowable shareholders, including individuals, certain trusts and estates. (Partnerships, corporations and nonresident aliens are generally not permitted.)
• Have no more than 100 shareholders.
• Have only one class of stock, meaning all shares confer identical rights to distribution and liquidation proceeds. However, voting rights may differ.
• Not be an ineligible corporation, such as certain financial institutions, insurance companies or domestic international sales corporations.

These criteria must be continuously met to maintain S corp status.

Advantages

An S corp offers several key advantages for small and closely held businesses. One of the most notable is pass-through taxation, which allows income, deductions and credits to flow through to the shareholders' personal tax returns, avoiding the double taxation faced by traditional C corps. Other key benefits include:

• Pass-through taxation, allowing income, deductions and credits to flow through to shareholders' personal tax returns.
• Limited liability protection for shareholders.
• Tax efficiency through a combination of reasonable salary and distributions, potentially reducing self-employment taxes.
• Potential state tax savings through pass-through entity (PTE) elections, allowing certain business entities to choose to pay state income tax at the entity level rather than passing the tax obligation through to individual owners. This election serves as a workaround to the federal $40,400 cap on state and local tax (SALT) deductions introduced by the Tax Cuts and Jobs Act of 2017.
• Losses deductible against other personal income such as wages, interest, dividends or income from another business (subject to basis limitations).
• Section 199A generally allows an S corp shareholder to deduct up to 20% of qualified business income reported on the shareholder's K-1. May be limited by taxable income, W-2 wages, qualified property and special rules for specified service businesses.

These benefits make the S corp structure especially attractive for businesses seeking tax efficiency and legal protection.

Potential Drawbacks

• Ownership is limited to eligible shareholders, which can restrict future investment opportunities.
• S corps cannot issue multiple classes of stock, limiting flexibility in ownership and capital raising.
• S corps are generally limited to 100 shareholders.
• The corporation must continuously satisfy IRS eligibility rules to maintain S corp status.
• Failure to meet S corp requirements can result in an involuntary termination of the election and taxation as a C corp.
• Less flexibility for distributing appreciated property. An S corp generally recognizes gain when it distributes appreciated property to a shareholder, as though the property had been sold at fair market value. That gain passes through to the shareholders and affects their stock basis, potentially creating current tax without a corresponding cash distribution. By contrast, a partnership can often distribute property without immediate recognition of gain, with the built-in gain generally preserved through carryover-basis rules. Exceptions may apply.
• An S corp shareholder generally can't deduct losses based solely on the corporation's recourse or nonrecourse debt; the shareholder must have sufficient stock basis or basis in a direct loan made to the corporation. Qualified nonrecourse financing may count toward the shareholder's at-risk amount for certain real-estate activities, but it generally doesn't create stock or debt basis for deducting S corp losses.

Other Considerations

Involuntary termination of S election: An S corp's election can be terminated involuntarily if it ceases to meet the above qualifications. Common causes include:

• Exceeding shareholder limits - Having more than 100 shareholders at any time.
• Ineligible shareholders - Issuing stock to a corporation, partnership or nonresident alien.
• Second class of stock - Creating a second class of stock, intentionally or inadvertently, such as through disproportionate distributions or certain shareholder agreements.
• Passive investment income - For S corps with accumulated earnings and profits (AE&P) from prior C corp years, having more than 25% of gross receipts from passive investment income for three consecutive years.
• Improper trust elections - Failing to make timely elections for qualified Subchapter S trusts (QSSTs) or electing small business trusts (ESBTs) holding S corp stock.
• Change in corporate structure - Becoming an ineligible corporation, such as some underwriting insurance company or banks.

Relief for inadvertent terminations:If an S corp's election is terminated due to an inadvertent error, the IRS may grant relief under IRC §1362(f), allowing the corporation to retain its S corp status retroactively. To qualify, the corporation must:

• Have made a valid S election that was terminated inadvertently.
• Take corrective action within a reasonable period after discovering the issue.
• Demonstrate that the termination was not due to willful neglect.
• Agree to make any adjustments required by the IRS.

The corporation must submit a request detailing the circumstances and corrective measures taken. The IRS will evaluate the request and determine whether to grant relief.

Consequences of termination:If the S election is terminated and not remedied, the corporation becomes a C corp effective on the termination date. This change subjects the corporation to double taxation: Once at the corporate level and again at the shareholder level upon distribution of dividends. Additionally, the corporation generally cannot re-elect S corp status for five years without IRS consent.

Best practices to maintain S corp status:

• Monitor shareholder eligibility - Ensure all shareholders remain eligible and that any transfers of stock comply with S corp requirements.
• Review agreements - Carefully draft and review shareholder agreements to prevent provisions that could create a second class of stock.
• Track income sources - Monitor the composition of income to avoid exceeding passive income limits, especially if the corporation has AE&P.
• Make timely elections for trusts - Ensure that any trusts holding S corp stock make the necessary elections promptly.

Maintaining S corp status requires oversight and adherence to IRS regulations. While the structure can provide significant tax advantages through pass-through taxation and potential tax planning opportunities, those benefits depend on continued compliance with shareholder, ownership and operational requirements. Understanding the rules and implementing best practices can help prevent inadvertent terminations and preserve the tax benefits associated with S corps.

Making the Right Choice

There is no one-size-fits-all answer when it comes to choosing between C corp and S corp status. The right choice depends on a variety of factors, including your ownership structure, plans for growth, capital needs and overall tax strategy. Look to our tax pros to help you evaluate the advantages, limitations and long-term implications of each option so you can make an informed decision for your business.