S Corporation vs LLC: Tax Implications for Closely Held Businesses in Tennessee

The Common Ground: Pass-Through Taxation

Both S corporations and limited liability companies offer pass-through taxation — the business itself does not pay federal income tax on its earnings. Income, loss, deductions, and credits flow through to the owners' individual returns and are taxed at their personal rates. This treatment distinguishes both structures from C corporations, which pay tax at the entity level and again when profits are distributed to shareholders. For a closely held business with active owners, avoiding that double layer of taxation is often the starting point for entity selection conversations.

But pass-through status is where the similarities end. The two structures diverge significantly in how they handle employment taxes, ownership restrictions, administrative requirements, and Tennessee state-level treatment. Selecting the wrong structure can mean paying more in self-employment or payroll taxes than the situation requires, or creating compliance problems that a different choice would have avoided entirely.

The Core Tax Difference: Employment Taxes

The most consequential practical difference between an S corporation and a single-member or multi-member LLC involves how owner earnings are taxed for employment tax purposes.

An LLC member who participates actively in the business generally owes self-employment tax on the full amount of their distributive share of business income. Self-employment tax covers both the employee and employer portions of Social Security and Medicare, and at meaningful income levels this tax is a significant cost. There is no built-in mechanism in the LLC structure to separate "wages" from "return on investment" for employment tax purposes.

An S corporation handles this differently. An owner who works in the S corporation business must pay themselves a "reasonable compensation" — a salary that reflects the fair market value of their services — subject to payroll taxes. Distributions beyond that reasonable compensation, however, are not subject to employment taxes. This separation creates an opportunity: at the right income level, an S corporation owner may pay employment taxes on a portion of what they earn rather than on the entire profit of the business.

S Corporation Eligibility Requirements

Not every business qualifies for S corporation status. The Internal Revenue Code imposes several restrictions:

• No more than 100 shareholders
• All shareholders must be US citizens or permanent residents (no nonresident alien shareholders)
• Only one class of stock is permitted — though differences in voting rights between shares of the same class are allowed
• No partnerships, corporations, or most trusts may be shareholders (certain qualified trusts are permitted)
• The entity must be a domestic corporation

LLCs are far more flexible on ownership. They can have unlimited members, accept non-US investors, and accommodate multiple classes of membership interest with different economic rights. For a business anticipating outside investment, foreign co-owners, or complex equity arrangements, the LLC structure is usually the more workable choice.

Tennessee Franchise and Excise Tax

Tennessee imposes both a franchise tax and an excise tax on businesses operating in the state. The excise tax is an income-based tax; the franchise tax is based on the greater of net worth or real and tangible property located in Tennessee. Both S corporations and LLCs that are treated as pass-through entities for federal purposes are generally subject to Tennessee's excise tax on the income earned in the state. The franchise tax also applies to both. Tennessee eliminated its Hall income tax on investment income in 2021, but the franchise and excise regime remains a meaningful cost of doing business that applies regardless of entity type. Counsel familiar with Tennessee's specific rates and filing requirements should be involved in any entity selection analysis.

When an S Corporation Election Makes Sense

The S corporation election tends to make economic sense when business profits consistently exceed what the owner would reasonably pay themselves as compensation. The higher the gap between reasonable salary and total earnings, the larger the employment tax savings on distributions. At lower profit levels, the administrative costs of running a payroll, filing quarterly employment returns, and handling the added complexity of S corporation accounting may exceed the tax savings.

LLCs remain the preferred starting structure for many closely held businesses because of their flexibility and lower administrative burden. An LLC can elect S corporation tax treatment without converting to a corporation — a strategy that combines the operational simplicity of the LLC form with the employment tax benefits of S corporation status. This election is available to multi-member LLCs that otherwise qualify.

Administrative Burden and Conversion

S corporations require payroll infrastructure, regular corporate formalities, and attention to the one-class-of-stock rule when making distributions or structuring ownership changes. LLCs are generally simpler to administer. For a closely held business where the owners handle their own bookkeeping or use a small accounting firm, these differences matter. When a business grows to the point where the employment tax savings of an S election are substantial, the administrative investment usually becomes worthwhile. Timing that transition correctly — before equity structures or ownership arrangements create complications — is a planning decision worth making deliberately rather than by default.