The short answer
For federal taxes, a single-member LLC and a sole proprietorship are taxed the same way. The reasons to form an LLC are mostly legal (limiting your personal liability) and practical (a separate business identity). The one tax lever, electing S corporation status, only pays off at higher profits.
Sole proprietor: the default
If you work for yourself and have not formed a company, you are a sole proprietor. That is automatic: there is nothing to file with the IRS to become one.
- You report income and expenses on Schedule C with your Form 1040.
- You pay self-employment tax (15.3% of 92.35% of your profit) and income tax.
- You and the business are legally the same person, so business debts and lawsuits can reach your personal assets.
- Your city, county or state may still require a business license or a registered business name (“DBA”).
LLC: what it is
A limited liability company is created under state law by filing articles of organization with your state. Each state sets its own filing fee, and many charge an annual fee or require an annual report. Its main purpose is legal: separating the business’s debts and liabilities from your personal assets.
That protection has limits. It generally does not cover your own negligence or debts you personally guarantee, and it can be weakened if you mix business and personal money. For how it works in your state, ask a business attorney.
How an LLC is taxed
The IRS does not have a separate “LLC tax”. By default:
| Default federal tax treatment | Main return | |
|---|---|---|
| Single-member LLC | Disregarded entity: taxed like a sole proprietorship | Schedule C on your Form 1040 |
| Multi-member LLC | Partnership | Form 1065, with a Schedule K-1 for each member |
| LLC that elects corporation status | C corporation (Form 8832) or S corporation (Form 2553) | Form 1120 or Form 1120-S |
So a single-member LLC owner pays the same self-employment tax and income tax as a sole proprietor, and both can take the qualified business income (QBI) deduction. Our self-employment tax calculator works the same for both.
The S corporation election
An LLC (or a corporation) can elect to be taxed as an S corporation by filing Form 2553. The idea behind the tax savings:
- The owner who works in the business must be paid a reasonable salary through payroll. Social Security and Medicare are paid on that salary, half by the company and half withheld from the owner.
- The rest of the profit can be taken as distributions, which are not subject to self-employment tax.
The IRS watches this closely: distributions to an owner who works in the business must be treated as wages to the extent they are reasonable pay for the work done. And an S corporation adds costs a sole proprietor does not have: running payroll, filing Form 1120-S, often a tax professional, and in some states extra fees or taxes.
In practice, the S corporation election is usually worth studying only when your profit is well above what a reasonable salary for your work would be, so the tax saved is bigger than the added costs. It is a decision to make with a tax professional, with your real numbers.
EIN and BOI reporting
- EIN. A single-member LLC with no employees can generally use the owner’s SSN or an EIN for income tax purposes. It needs its own EIN for employment or excise taxes, and banks usually ask for one. Our EIN guide explains how to get one for free.
- BOI reporting. According to FinCEN, companies created in the United States are now exempt from beneficial ownership information (BOI) reporting. Be careful with letters or emails asking you to pay to file a BOI report for a U.S. LLC.
Quick comparison
| Sole proprietor | Single-member LLC | |
|---|---|---|
| Setup | Automatic | File with your state and pay a fee |
| Ongoing cost | Local licenses, if any | State annual fees or reports, depending on the state |
| Federal taxes | Schedule C + self-employment tax | Same, unless it elects S or C corporation status |
| Liability | Personal assets exposed | Generally limited to the business, with exceptions |
| Paperwork | Minimal | Keep business and personal finances separate |
A sole proprietorship is usually enough when you are starting out, your risk of being sued is low (for example, freelance writing or design), and you want the least paperwork. For drivers, the main risk is an accident, which is covered by auto insurance rather than by an LLC. An LLC is worth considering when your work carries real liability risk, you sign contracts or leases, you hire people, or you want a separate business identity. Either way, business insurance is often the first line of protection.