For federal taxes, a single-member LLC changes almost nothing unless you make an election. By default, the IRS treats a one-owner LLC as a “disregarded entity,” part of its owner’s own tax return, per the IRS LLC page. You still file Schedule C and pay the same self-employment tax, you get the same QBI deduction, and you make the same quarterly estimated payments. An LLC is a state-law structure, mainly about liability and how you’re organized. The tax changes come from elections you can make on top of it.
How the IRS classifies an LLC
An LLC isn’t a federal tax category of its own. The IRS slots it into one of the existing ones, depending on how many owners it has and what it elects:
| Situation | Taxed as | Federal return |
|---|---|---|
| One member, no election (default) | Disregarded entity | Owner's Form 1040 (Schedule C) |
| Two or more members, no election (default) | Partnership | Form 1065, with K-1s to members |
| Elects corporation on Form 8832 | C corporation | Form 1120 |
| Elects S corporation on Form 2553 | S corporation | Form 1120-S, with K-1s |
One member, no election (default)
- Taxed as
- Disregarded entity
- Federal return
- Owner's Form 1040 (Schedule C)
Two or more members, no election (default)
- Taxed as
- Partnership
- Federal return
- Form 1065, with K-1s to members
Elects corporation on Form 8832
- Taxed as
- C corporation
- Federal return
- Form 1120
Elects S corporation on Form 2553
- Taxed as
- S corporation
- Federal return
- Form 1120-S, with K-1s
Source: IRS, Limited liability company (LLC), and Instructions for Form 2553. An LLC making an S election that meets the tests doesn't need to file Form 8832 separately.
A classification election on Form 8832 generally can’t take effect more than 75 days before it’s filed, or more than 12 months after, per the IRS.
What doesn’t change with a single-member LLC
| Sole proprietorship | Single-member LLC | |
|---|---|---|
| Where business income is reported | Schedule C on your Form 1040 | Same: Schedule C on your Form 1040 |
| Self-employment tax | 15.3% on 92.35% of net profit (SS part up to $184,500) | Same |
| QBI deduction | Up to 20% of QBI | Same |
| Estimated tax payments | Form 1040-ES, four installments | Same |
| Tax on $80,000 of 2026 profit (single, standard deduction) | $16,648 federal | $16,648 federal |
| EIN required? | Only in specific cases (e.g. employees, a retirement plan) | Not if no employees or excise taxes; must use its own EIN for payroll |
| Payroll and certain excise taxes | Owner is the taxpayer | LLC is treated as a separate entity |
| State formation and annual fees | No entity to form (local licenses or a DBA may still apply) | Set by your state; vary widely |
- Where business income is reported
- Sole proprietorshipSchedule C on your Form 1040Single-member LLCSame: Schedule C on your Form 1040
- Self-employment tax
- Sole proprietorship15.3% on 92.35% of net profit (SS part up to $184,500)Single-member LLCSame
- QBI deduction
- Sole proprietorshipUp to 20% of QBISingle-member LLCSame
- Estimated tax payments
- Sole proprietorshipForm 1040-ES, four installmentsSingle-member LLCSame
- Tax on $80,000 of 2026 profit (single, standard deduction)
- Sole proprietorship$16,648 federalSingle-member LLC$16,648 federal
- EIN required?
- Sole proprietorshipOnly in specific cases (e.g. employees, a retirement plan)Single-member LLCNot if no employees or excise taxes; must use its own EIN for payroll
- Payroll and certain excise taxes
- Sole proprietorshipOwner is the taxpayerSingle-member LLCLLC is treated as a separate entity
- State formation and annual fees
- Sole proprietorshipNo entity to form (local licenses or a DBA may still apply)Single-member LLCSet by your state; vary widely
The $16,648 figure is the 2026 federal income tax plus self-employment tax for a single filer with $80,000 of net profit and no other income, as worked out in our quarterly estimated tax guide. State fees and taxes vary and aren't included.
Taxes are identical. The $80,000 freelancer in our quarterly estimated tax example owes $11,304 in self-employment tax and $5,344 in federal income tax, $16,648 in total. That’s the same whether they operate as a sole proprietor or through a single-member LLC with default classification. The income, the forms and the math don’t change.
What does change
- Employment and certain excise taxes. The IRS says a single-member LLC that’s disregarded for income tax is still a separate entity for employment tax and certain excise taxes. If it has employees, it reports and pays payroll taxes under its own name and EIN.
- The EIN question. A disregarded single-member LLC with no employees and no excise tax liability doesn’t need an EIN. It uses your name and taxpayer ID. It can get one anyway, for instance if a bank or your state requires it. (If you open a Solo 401(k), you’ll need an EIN regardless: see Do I Need an EIN to Open a Solo 401(k)?)
- State costs and rules. Formation fees, annual reports and any state-level LLC taxes are set by each state, and the IRS notes that LLC rules vary by state. Everything in this article is federal. Your state may charge its own fees or taxes on an LLC, and its tax treatment may not follow the federal classification. Check your state’s business-filing office and tax agency before comparing costs.
- The option to elect. An LLC can choose corporate or S corporation treatment. A sole proprietorship can’t elect anything. It would first need to form an entity.
When the LLC starts to matter for tax: elections
The real tax decision isn’t “LLC or not.” It’s whether to keep default treatment or elect S corporation status. An S corp election lets you split your income into a salary, which carries payroll taxes, and distributions, which don’t carry self-employment tax. That can lower your total tax at higher profit levels. It also adds payroll, a separate return and reasonable-compensation rules. We walk through the numbers in S Corp Election for Freelancers: When It Makes Sense.
Bottom line
Form an LLC for legal and practical reasons, not for a federal tax cut, because by default it doesn’t produce one. A single-member LLC is taxed exactly like a sole proprietorship: same Schedule C, same 15.3% self-employment tax, same QBI deduction, same estimated payments. What it adds is state fees and paperwork, a separate identity for payroll, and the option of an S corporation election later.