Quick answer: An LLC is a legal structure that provides liability protection, but the IRS doesn't recognize "LLC" as a tax classification. A single-member LLC is taxed as a sole proprietorship by default (all profit on Schedule C, subject to 15.3% SE tax). A multi-member LLC is taxed as a partnership. Owners can elect S-corp or C-corp taxation — and for profitable businesses, the S-corp election is often the most tax-efficient choice.
The Four LLC Tax Options
1. Sole proprietorship (default, single member): All net profit is reported on Schedule C and subject to self-employment tax (15.3% on first $168,600, 2.9% above). Simple but most expensive at higher income levels. 2. Partnership (default, multi-member): Income flows through to partners on Schedule K-1; each partner pays SE tax on their distributive share. 3. S-corporation election (Form 2553): Owner pays self-employment tax only on W-2 salary, not on distributions — the key SE tax savings strategy discussed in S-corp pages. 4. C-corporation election (Form 8832): Entity pays 21% flat corporate tax; dividends to owners are taxed again at capital gains rates ("double taxation"). Generally not ideal for small closely-held businesses.
When to Change Your LLC Tax Classification
Most single-member LLCs earning under $50,000 net should stay as a sole proprietorship — the administrative burden and cost of S-corp status outweigh the savings. At $80,000–$120,000 net profit, the analysis gets close — run the numbers with your CPA. Above $120,000 in consistent net profit, the S-corp election typically produces net savings of $5,000–$20,000+ per year after accounting for additional payroll administration and tax filing costs ($1,000–$3,000/year). The election is generally made by March 15 of the year you want it effective (or within 75 days of formation for a new LLC). Missing the deadline means waiting another year — file Form 2553 early.
LLC vs. S-Corp: Common Misconceptions
Many business owners think they need to form a new S-corporation to get S-corp tax treatment. Not true — an existing LLC can elect S-corp tax status by filing Form 2553 while remaining an LLC under state law. The LLC retains its operating agreement, member structure, and legal simplicity. The IRS simply taxes it differently. S-corp status does impose requirements: you must run payroll, pay yourself a reasonable salary, file a separate corporate return (Form 1120-S), and issue K-1s. But you remain an LLC for all state law purposes. Work with a CPA to model the exact tax savings for your income level and business type before making any election.
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