One protects your personal assets if your business gets sued. The other is free and requires zero paperwork to start. Here's exactly how they differ on liability, taxes, and cost — and when each one actually makes sense.
A sole proprietorship isn't something you file for — it's what you are, by default, the moment you start doing business under your own name without forming any legal entity. No paperwork, no fee, no separate tax return. The catch is that legally, there's no distinction between you and your business. If your business is sued, owes a debt, or breaks a contract, your personal assets — your house, your car, your savings — are on the table, not just whatever the business itself owns.
An LLC (limited liability company) creates a legal wall between you and your business. Formed by filing paperwork with your state, it means that in almost all cases, if your LLC is sued or can't pay a debt, creditors can only go after what the business owns — not your personal bank account or home. That liability shield is the single biggest reason people form an LLC instead of operating as a sole proprietor, and it's the main thing you're paying the filing fee for.
| Factor | Sole Proprietorship | LLC |
|---|---|---|
| Personal liability | Unlimited — personal assets at risk | Limited to what the business owns |
| Setup cost | $0 — no filing required | $35–$500 state filing fee |
| Ongoing paperwork | None required | Annual report / franchise tax in most states |
| Default taxation | Pass-through, Schedule C | Pass-through by default (same as sole prop) |
| Self-employment tax | On all net profit | Can potentially reduce via S-corp election |
| Credibility with banks/clients | Lower — no formal registration | Higher — registered legal entity |
| Ability to bring on partners/investors | Not supported (becomes a partnership) | Supported via membership structure |
Both structures are "pass-through" by default — the business itself doesn't pay federal income tax.
Business profit and loss is reported on Schedule C, attached to your personal Form 1040.
A single-member LLC is taxed identically to a sole proprietorship unless you elect otherwise — the liability protection doesn't cost you anything in default tax treatment.
Both structures owe 15.3% self-employment tax on net profit by default — this doesn't change just by forming an LLC.
Only an LLC (or corporation) can elect S-corp tax treatment, which can reduce self-employment tax once profit is high enough to justify the added payroll complexity.
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