If you sell products, freelance, or get paid for a service, you already have a business. The real question is whether that business is legally just you, or a company you own. That's the core difference between a sole proprietorship and an LLC, and it matters more as the business grows.
This guide covers how each one works, what an LLC actually changes (and what it doesn't), and the practical signs that it's time to make things official.
What is a sole proprietorship?
A sole proprietorship is what you have by default when you run a business on your own without forming a legal entity. There's no state filing to create it. The moment you start doing business, you're a sole proprietor.
That simplicity is the appeal:
- No formation paperwork or state filing fee
- Business income goes on your personal tax return, using Schedule C with your Form 1040
- You can usually use your Social Security number instead of an EIN, unless you hire employees or meet certain other IRS criteria
You may still need local business licenses, a sales tax permit, or a "doing business as" (DBA) filing if you operate under a name other than your own. Those requirements vary by state, county, and city.
The catch is that the law sees no difference between you and the business. Business debts are your debts. If the business is sued, you are sued, and your personal savings, car, and home equity can be on the line.
What is an LLC?
A limited liability company is a separate legal entity you create by filing formation documents, usually called articles of organization or a certificate of formation, with a state. Once the state accepts the filing, the LLC exists apart from you. It can sign contracts, open bank accounts, and own property in its own name.
The headline benefit is in the name: limited liability. In general, the LLC's debts and legal obligations belong to the LLC, not to its owners (called members). If the business can't pay a vendor or loses a lawsuit, creditors generally have to go after business assets, not your personal ones.
LLC vs. sole proprietorship at a glance
| Sole proprietorship | Single-member LLC | |
|---|---|---|
| How it's created | Automatically, by doing business | Filing with a state |
| Personal liability for business debts | Yes, unlimited | Generally limited to what you've put into the business |
| Federal income tax by default | Schedule C on your personal return | Same: Schedule C, as a disregarded entity |
| Self-employment tax | On net profit | On net profit, by default |
| Option to be taxed as an S-Corp | No | Yes, by filing IRS Form 2553 |
| State paperwork | Local licenses, plus a DBA if you use a trade name | Formation filing, local licenses, and annual reports or fees in many states |
| Registered agent required | No | Yes |
Does an LLC change your taxes?
Not by default, and that surprises a lot of people. For federal income tax purposes, the IRS treats a single-member LLC as a "disregarded entity." You report the business's income and expenses on Schedule C, exactly as a sole proprietor would, and pay self-employment tax on your net earnings. An LLC with two or more members is taxed as a partnership by default.
So forming an LLC usually won't lower your tax bill on its own. What it does is give you options. An LLC can elect to be taxed as an S corporation by filing IRS Form 2553, which can reduce self-employment taxes once profits reach a certain level. That's a separate decision with its own costs, covered in when to elect S-Corp status.
States can handle LLCs differently for tax purposes, and some charge annual fees or franchise taxes whether or not the business makes money. Check your state's rules before you file.
What an LLC does not protect you from
Limited liability is real, but it isn't a force field. An LLC generally won't shield you from:
- Your own actions. If you personally cause harm through negligence or a professional mistake, you can typically be held responsible regardless of the LLC.
- Personal guarantees. Many landlords, lenders, and credit card issuers ask small business owners to personally guarantee business debt. If you sign, you're on the hook.
- Mixing money. If you pay personal expenses from the business account, or deposit business income into your personal account, a court may decide the LLC isn't truly separate and "pierce the veil." Keep separate accounts from day one. Our guide to opening a business bank account walks through it.
- Certain unpaid payroll taxes. The IRS can hold the people responsible for paying them personally liable.
Business insurance still matters, too. An LLC limits what creditors can reach; insurance pays claims. Most businesses with real risk need both.
Signs it's time to form an LLC
There's no revenue number that makes an LLC mandatory. But these are the moments when many sole proprietors decide to make it official.
You're signing contracts with real stakes
Leases, client agreements with indemnity clauses, vendor contracts with payment terms. When a single dispute could cost more than you're comfortable losing personally, it's time.
Your work could plausibly hurt someone
Physical products, food, events, home services, fitness instruction, or anything involving a client's property or body. Higher-risk work deserves an entity and insurance.
You're bringing in a partner
If two or more people go into business together without forming an entity, the law generally treats them as a general partnership, and each partner can be personally liable for the business's obligations. An LLC with a written operating agreement is a far better starting point.
You're hiring
Employees bring payroll taxes, workers' compensation requirements, and new kinds of liability. Most owners prefer to run that through a separate entity.
The money is getting serious
Once the income is meaningful, you have more to protect, and S-Corp tax treatment may become worth a look. Both point toward an LLC.
You want to look established
Some clients and larger companies prefer to work with a registered business. An LLC also makes it easier to keep your business identity separate from your personal one.
When staying a sole proprietor is fine
A sole proprietorship can be a reasonable choice when you're testing an idea, revenue is small, and the risk of being sued is genuinely low, like selling digital downloads or doing occasional freelance writing. Plenty of people stay sole proprietors for years without trouble.
Just make the choice deliberately. The cost of forming an LLC is usually modest compared to what's at stake if something goes wrong while everything is in your name.
One caveat: if you work in a licensed profession such as law, medicine, or accounting, your state may require a professional LLC (PLLC) or a professional corporation instead, and some states don't allow certain professionals to use a standard LLC at all.
What it costs to form an LLC
The main costs are:
- State filing fee. Every state charges one, and amounts vary widely. Our breakdown of how much it costs to start an LLC walks through every fee.
- Ongoing state requirements. Many states require an annual or biennial report, and some charge an annual fee or franchise tax.
- Registered agent. Every LLC needs one. In many cases you can serve as your own or hire a service.
- Optional extras. An EIN, which is free from the IRS, an operating agreement, and any licenses or permits your business needs.
If you'd rather not handle the paperwork yourself, EZ Entity Setup's Starter plan is $0 plus state fees and files in 7 to 14 days. You can compare all the options on our pricing page.
How to switch from sole proprietor to LLC
You don't have to unwind anything dramatic. The typical path looks like this:
- Form the LLC in your state.
- Get an EIN for the LLC if it needs one.
- Open a business bank account in the LLC's name.
- Move client billing, payment platforms, and subscriptions over to the LLC.
- Update licenses, permits, and any DBA filings.
- Start invoicing and signing new contracts as the LLC.
Contracts you signed in your own name before the LLC existed don't automatically become the LLC's, so review them and ask the other party about assigning or re-signing where it makes sense.
The short version
A sole proprietorship is free and automatic, but you and the business are legally the same person, so your personal assets are exposed. A single-member LLC is taxed the same way by default and comes with a state filing fee and ongoing state requirements, but it generally separates business liabilities from your personal life and gives you the option of S-Corp tax treatment later.
If you're signing contracts, taking on risk, hiring, or partnering with someone, it's time to make it official.
This article is general information, not legal or tax advice. For decisions about your situation, talk to an attorney or a tax professional.