Short answer
A sole proprietor and a single-member LLC owner usually pay the same federal tax: by default the IRS treats a single-member LLC as a "disregarded entity", so its profit goes on the owner's Schedule C and is subject to self-employment tax, just like a sole proprietorship. The main difference is legal: a sole proprietorship isn't separate from its owner, while an LLC is formed under state law and in most cases protects the owner from personal liability for the business's debts. An LLC costs a state filing fee and some ongoing paperwork.
When you start working for yourself, you are a sole proprietor automatically. You don't have to file anything with the state to become one. An LLC, by contrast, is created by a filing with a state. The question many owners ask is whether that filing is worth it.
The tax rules below come from the IRS pages on sole proprietorships and LLCs, and the liability points from the U.S. Small Business Administration, all linked at the end.
Sole proprietor vs. LLC at a glance
| Sole proprietorship | Single-member LLC | |
|---|---|---|
| How it starts | Automatically, when you do business on your own | A filing with the state, which allows LLCs by statute |
| Separate from the owner? | No | Yes, a separate legal entity |
| Personal liability for business debts | You can be held personally liable | Protected in most instances |
| Default federal tax | Schedule C on your Form 1040 | Same: disregarded entity, Schedule C on your Form 1040 |
| Self-employment tax | Yes, 15.3% on net earnings | Yes, the same way |
| Can elect corporate tax treatment? | No | Yes, with Form 8832 |
| State setup and upkeep | Usually none, beyond any local licenses or a trade name | Formation fee, a registered agent and any yearly state report or fee |
How a sole proprietor is taxed
The IRS defines a sole proprietor as someone who owns an unincorporated business by themselves. You report the business on your personal return: Form 1040 with Schedule C for the profit or loss, Schedule SE for self-employment tax, and Form 1040-ES for estimated tax payments during the year.
Self-employment tax is 15.3%: 12.4% for social security and 2.9% for Medicare. You owe it if your net earnings from self-employment are $400 or more. You can deduct the employer-equivalent part of it when you figure your adjusted gross income.
How a single-member LLC is taxed
Unless it chooses otherwise, an LLC with one member is a disregarded entity: the IRS ignores it for income tax, and its activity goes on the owner's return. For an individual owner, that usually means Schedule C, the same as a sole proprietor. The owner pays self-employment tax in the same manner as a sole proprietorship.
Two differences appear when the LLC has employees or owes certain excise taxes:
- Payroll: for employment taxes, the IRS treats a single-member LLC as a separate entity. It must use its own name and its own EIN to report and pay payroll taxes.
- EIN: a single-member LLC with no employees and no excise tax liability doesn't need an EIN and uses the owner's name and taxpayer identification number for federal tax. It may still get one if a bank or the state requires it.
An LLC with two or more members is taxed as a partnership by default, and an LLC of any size can elect to be taxed as a corporation by filing Form 8832. A different tax treatment can make sense at higher profits, but it brings its own filings and costs, so it is worth running the numbers with a tax planning review first.
Liability: the main reason to form an LLC
A sole proprietorship doesn't create a separate business entity. The SBA says that as a sole proprietor you can be held personally liable for the debts and obligations of the business. If the business can't pay a debt or loses a lawsuit, your personal savings, car or home can be at risk.
An LLC is a separate entity. The SBA says LLCs protect you from personal liability in most instances. The protection has limits: a loan you personally guarantee is still your personal debt, for example. Keep a separate business bank account and separate books, as the IRS recommends for any business, so the line between you and the LLC stays clear. Business insurance is still worth having either way.
Costs and paperwork
A sole proprietorship has almost no setup. You may still need local business licenses, and if you use a name other than your own, many states require you to register it as a trade name (a DBA).
An LLC needs a state filing, a registered agent and, depending on the state, a yearly report or fee. Costs vary a lot by state; our Texas LLC guide walks through one state's steps, and Wyoming vs. Delaware vs. Texas compares three popular choices.
Which should you choose?
- Testing an idea with little risk: starting as a sole proprietor is simple, and you can form an LLC later.
- Signing contracts, hiring, renting space or holding inventory: the liability protection of an LLC usually becomes worth the filing fee.
- Working with clients who prefer a registered business: some clients and platforms are easier to work with as an LLC.
- Planning to grow or bring in a partner: an LLC gives you room to add members or change tax treatment without starting over.
Either way, the tax habits are the same: keep business money separate, track every expense, and pay quarterly. Our guide to estimated tax payments for 2026 covers the deadlines.
How Top Accounting Firm can help
Our company formation service sets up your LLC and EIN, and our bookkeeping and tax preparation teams handle what comes after. Living outside the U.S.? See our foreign-owned LLC services. Or book a free consultation to talk it through.
Frequently asked questions
Do I pay less tax with an LLC than as a sole proprietor?
Does an LLC protect my personal assets?
Does a single-member LLC need an EIN?
Do sole proprietors pay self-employment tax?
Can I switch from a sole proprietorship to an LLC later?
What tax form does a single-member LLC file?
Sources
- IRS: Sole proprietorships
- IRS: Single member limited liability companies
- IRS: Limited liability company (LLC)
- IRS: Self-employment tax (Social Security and Medicare taxes)
- U.S. Small Business Administration: Choose a business structure
Checked against these sources on October 26, 2026. This article is general information, not tax or legal advice. Rules, fees and deadlines change, so confirm with the official source or a tax professional before you file.
