A sole proprietorship is the default: if you do business in your own name and never register another structure, you already are one. An LLC (limited liability company) is a state legal wrapper. It can separate many business debts from your house and personal savings—if you form it correctly, keep it in good standing, and do not personally guarantee everything anyway. Forming an LLC does not, by itself, cut your federal income tax. A single-member LLC is usually taxed like a sole proprietor unless you elect otherwise.
The U.S. Small Business Administration’s choose a business structure page is the official comparison. The IRS LLC page is how the federal government classifies the thing after your state creates it.
This is education, not legal advice, and not a pitch to buy a $299 “instant LLC” package.
LLC vs sole proprietorship in one table
| Sole proprietorship | LLC | |
|---|---|---|
| How it starts | Automatic when you start doing business (SBA) | You register with the state (articles/certificate of organization) |
| Personal liability | Unlimited—business debts can reach personal assets (SBA) | Members are generally not personally liable for LLC debts; exceptions exist (personal guarantees, fraud, unpaid employment taxes, malpractice in some professions) |
| Federal income tax (default) | Schedule C on Form 1040 | Single-member: usually a disregarded entity (still Schedule C). Multi-member: usually a partnership. Either can elect corporate tax on Form 8832 (IRS) |
| Self-employment tax | Yes, on net earnings (typically Schedule SE) | Members are generally self-employed on pass-through profits (SBA). An S corp election is a later, separate tax design—not automatic |
| Paperwork | Licenses, sales tax, a DBA if you use a trade name | State formation + annual report/franchise tax in many states + an operating agreement (strongly wise even if not required) + EIN in many cases |
| Typical fit (SBA) | Low-risk idea you are testing | Higher-risk work, or owners with assets they want fenced off |
SBA is explicit: sole proprietorships are easy and give you complete control; they do not produce a separate entity. An LLC is meant to protect personal assets “in most instances” if the company faces lawsuits or bankruptcy. “Most instances” is doing real work. A landlord who wants your personal guarantee still wants your personal guarantee.
Do I need an LLC to start a side hustle?
No. Plenty of profitable U.S. sole proprietors never form one. You can invoice, open a dedicated checking account, collect sales tax if your state requires it, and file Schedule C without an LLC. Pricing and a contract matter on day one; see how to price a side hustle.
Form an LLC when the risk is no longer “a few website invoices” and you have something to protect—or a client/landlord/lender requires an entity. Forming one because a YouTube ad said “real businesses have LLCs” is how people pay annual report fees for a $4,000 hobby.
Does an LLC save on taxes?
Usually not by itself. IRS default: a one-owner LLC is disregarded. You still report profit on Schedule C and generally pay self-employment tax (15.3% Social Security + Medicare on net earnings, with extra Medicare tax above IRS thresholds). That is the same shape as a sole proprietorship.
What can change the tax picture later:
- Deductible business expenses you actually incur (entity or not)
- An S corporation election (Form 2553) if a tax professional models reasonable salary vs distributions—easy to get wrong, payroll required
- A C corporation election (Form 8832)—rare for a household side hustle
- State LLC taxes and fees, which can raise cost even when federal tax is unchanged
If someone promises “form an LLC and your tax rate drops,” ask which form they mean. The letters on the state certificate are not a deduction.
How do I form an LLC?
States run this, not the IRS. The SBA register your business guide is the map:
- Pick the state you will actually operate in (usually where you live). Forming in Delaware or Wyoming while you work from Ohio does not magically skip Ohio registration if you are doing business there.
- Name search and follow that state’s LLC naming rules.
- File articles/certificate of organization and pay the state’s fee.
- Registered agent in the state (you or a service).
- Operating agreement even as a single member—banks and future-you will want it.
- EIN from the IRS if required (employees, certain banking, multi-member). Many single-member LLCs still get one to avoid using a Social Security number on Form W-9.
- Licenses, sales tax permits, and a DBA if you use a public name different from the legal name.
- Keep it alive: annual reports, franchise taxes, a separate bank account, and contracts in the LLC’s name. Mixing personal and LLC money is how courts “pierce the veil.”
Formation mills that upsell trademarks, registered-agent forever-plans, and “privacy” packages are optional vendors. The filing itself is a state form.
Sole proprietorship vs LLC vs S corp
Sole prop / default single-member LLC: one tax pile, Schedule C, self-employment tax on the profit.
S corp: a tax status. An LLC (or a corporation) can elect it if it qualifies. It does not replace state LLC law. Payroll, reasonable compensation, and extra filings are the price of the design. This page is not an S corp how-to.
Partnership: default for a multi-member LLC that does not elect corporate tax. You will want a written agreement before you split profits in a group chat.
When an LLC is often not the first move
- The “business” is still a test with tiny revenue and no real lawsuit surface
- You cannot pay the state’s annual fee without skipping emergency savings
- You would still sign a personal guarantee on the only large risk (van lease, office lease, inventory credit)
- You have not separated a business checking account yet—do that first, LLC or not
Insurance (general liability, professional liability, a commercial policy if you have a shop) can matter more than the entity letters. An LLC plus no insurance is a document. A sole prop plus a real policy is sometimes the better year-one stack. Ask a licensed producer; this is not an insurance quote.
Sources
- SBA, Choose a business structure (sole prop vs LLC liability and tax sketch).
- SBA, Register your business.
- IRS, Limited liability company (LLC) and Publication 3402.
- IRS, Self-employment tax.
- This is not a formation service, not an attorney, and not a recommendation to file in any particular state.
