An LLC is a business entity structure that combines limited personal liability protection with pass-through taxation — the most popular entity type for U.S. small businesses. Owners (called members) are generally not personally liable for business debts beyond their investment, except where a personal guarantee or fraud exception applies.
LLCs are formed by filing Articles of Organization with the state secretary of state and paying a state filing fee (typically $50–$500 depending on state). The LLC is a legally separate person from its owners — it can own assets, sign contracts, and incur debt in its own name. Tax treatment: by default, a single-member LLC is a 'disregarded entity' taxed on Schedule C (same as sole proprietorship). A multi-member LLC is taxed as a partnership (Form 1065 + K-1s). Either type can elect to be taxed as an S-Corp or C-Corp if beneficial. Many LLCs elect S-Corp taxation to reduce self-employment tax once net profits exceed ~$60K annually. For business credit building, an LLC is the minimum entity structure required to establish a separate business credit profile with Dun & Bradstreet, Experian Business, and Equifax Business. An LLC with its own EIN, business bank account, and trade lines can develop a PAYDEX score and business credit file independent of the owner's personal credit — the foundation for eventually accessing financing without personal guarantees. Personal liability protection has limits: courts can 'pierce the corporate veil' if the LLC isn't maintained as a separate entity (co-mingled finances, no operating agreement, no separate bank account). Also, personal guarantees on business loans contractually override LLC liability protection for that debt specifically. The IRS provides comprehensive LLC tax guidance at irs.gov/businesses/small-businesses-self-employed/limited-liability-company-llc (https://www.irs.gov/businesses/small-businesses-self-employed/limited-liability-company-llc). As of January 2024, LLCs are also subject to FinCEN's Beneficial Ownership reporting requirements under the Corporate Transparency Act (https://www.fincen.gov/beneficial-ownership-information) — most LLCs must report their beneficial owners annually.
For most small businesses earning under $60K net profit annually, LLC default taxation (Schedule C or partnership) is fine. Above $60K net profit, the LLC with S-Corp election often saves self-employment tax. Above $250K net profit, the math strongly favors S-Corp election. Consult a CPA — the optimal structure depends on your specific income, business costs, and state tax rules.
Partially. The LLC itself is liable for business debts, not you personally — unless you've signed a personal guarantee (PG). Most small business loans require PGs from owners with 20%+ equity regardless of entity type. The LLC limits your liability for unguaranteed business obligations (trade credit, vendor debts, lawsuit judgments against the business), but PGs override LLC protection for guaranteed debt.