LLC vs S-Corp: what changes for taxes?

An LLC does not automatically mean S-Corp taxation. A single-member LLC is commonly treated as a disregarded entity by default, while S-Corp treatment generally requires an election and adds payroll, reasonable compensation, and extra filing requirements.

A limited liability company is created under state law. For federal tax purposes, an LLC can be treated in different ways depending on ownership and elections. A single-member LLC is commonly disregarded by default, which means the owner often reports business income on Schedule C. S-Corp treatment generally changes the tax classification, not the state-law existence of the LLC itself.

This distinction matters because many searches for LLC vs S-Corp are really asking two questions at once: what entity should I form, and how should the business be taxed? SCorpMath focuses on the second question at a high level.

Sole proprietors and disregarded LLC owners generally pay self-employment tax on net earnings. An S-Corp shareholder-employee generally receives a salary subject to payroll taxes, while remaining profit may be distributed differently. That difference can matter, but it is not the whole decision.

Suppose a single-owner business has $120,000 of net profit before owner compensation. Under default sole proprietor or disregarded LLC treatment, a simplified estimate may apply self-employment tax to net earnings. Under an S-Corp assumption, the owner might compare a shareholder-employee salary, payroll taxes on that salary, remaining distributions, and extra admin costs.

That comparison can show why S-Corp election may be worth discussing, but it does not decide the answer. The salary assumption, payroll setup, tax filing costs, state rules, and full tax return can all change the result.

S-Corp treatment can add payroll setup, bookkeeping, a separate business tax return, state-level costs, reasonable compensation analysis, and more administrative work. These costs can outweigh the estimated payroll tax difference, especially at lower profit levels.

• Is my business eligible for S-Corp treatment?
• What salary range could be supportable for the services I perform?
• What would payroll, bookkeeping, and Form 1120-S preparation cost?
• Would state-level taxes or fees change the estimate?
• Is there enough expected profit for the added complexity to make sense?
• What Form 2553 timing or late election issues should I understand?

State-level taxes and fees can materially change an LLC vs S-Corp estimate. California, Texas, Florida, New York, and Washington are useful examples. California has LLC annual tax, LLC fee, minimum franchise tax, and S-Corp state tax issues. Texas has no personal state income tax, but Texas franchise tax and information report rules can still matter. Florida has no personal state income tax, but corporate income tax rules, annual reports, and account status can still affect the analysis. New York adds state S election and New York City entity-level questions. Washington has no personal income tax, but B&O gross receipts tax can still matter.

If your business is in California, read the California LLC vs S-Corp guide. If your business is in Texas, read the Texas LLC vs S-Corp guide. If your business is in Florida, read the Florida LLC vs S-Corp guide. If your business is in New York, read the New York LLC vs S-Corp guide. If your business is in Washington, read the Washington LLC vs S-Corp guide before relying on a generic estimate.

See all published state-specific pages in the LLC vs S-Corp by state guide.