For US federal income tax, an LLC with only one member is treated as an entity disregarded as separate from its owner — the IRS calls this the default classification. You report the business on your own Form 1040 or 1040-SR, generally on Schedule C, and you pay self-employment tax the same way a sole proprietor does, per the IRS page on single member limited liability companies.
Two things change the picture, and they are separate from each other. You can file Form 8832 to be taxed as a corporation instead. And "disregarded" applies to income tax only — not to employment tax.
What "disregarded entity" actually means
Disregarded means the IRS does not treat the LLC as a taxpayer in its own right for income tax. There is no separate business income tax return for the LLC; its income and expenses land on your personal return instead.
The default is not permanent. Per the IRS, the LLC stays disregarded "unless it files Form 8832 and affirmatively elects to be treated as a corporation." Until you file that form, the default holds.
How you report it: Schedule C and self-employment tax
An individual owner reports the LLC's activity on Form 1040 or 1040-SR Schedule C, Profit or Loss from Business (Sole Proprietorship), or on Schedule E or F where the activity calls for one.
If the LLC operates a trade or business, you are subject to tax on net earnings from self-employment in the same manner as a sole proprietorship. Sole proprietors pay that tax through Schedule SE (Form 1040), Self-Employment Tax, according to the IRS sole proprietorships page.
This is the part that surprises new owners: choosing an LLC does not, by itself, change how your business profit is taxed at the federal level. The LLC is a state-law structure; the tax treatment is a separate federal question.
Employment tax is where the LLC is still separate
For employment tax purposes and certain excise taxes, a single-member LLC is still considered a separate entity even though it is disregarded for income tax. That distinction shows up in three practical places:
- Wages. For wages paid after 1 January 2009, the LLC must use its own name and its own EIN for reporting and payment of employment taxes.
- Excise taxes. The entity, not the owner, is the one with the obligation.
- Information returns. For income-tax purposes, a W-9 should show the owner's SSN or EIN — not the LLC's EIN.
Do you need an EIN?
| Situation | EIN needed? |
|---|---|
| The LLC has employees | Yes |
| The LLC must file an excise tax form | Yes |
| No employees and no excise tax liability | Not required, but you may still obtain one |
The IRS notes that most new single-member LLCs classified as disregarded entities will need an EIN. Even where it is not required, the IRS gives examples of getting one anyway, such as to open a bank account or where state law requires one — those are common reasons owners obtain one rather than federal filing requirements.
Electing corporate treatment with Form 8832
Form 8832, Entity Classification Election is how an eligible entity elects how it will be classified for federal tax purposes: as a corporation, a partnership, or an entity disregarded as separate from its owner. For a one-owner LLC, the election that matters here is the one that makes it a corporation.
Timing is constrained. Per the IRS LLC page, a classification election generally cannot take effect more than 75 days before the date the election is filed, nor later than 12 months after the date it is filed. In other words, you cannot file the election and have it apply retroactively to a period well before you filed, and you cannot schedule it far into the future.
If a spouse is a co-owner
An LLC owned by husband and wife in a non-community property state should file as a partnership, per the IRS. That takes it out of the single-member treatment described on this page, even if the two owners file a joint personal return.
Formation rules are state law, not federal tax law
An LLC is a business structure allowed by state statute, and each state may use different regulations — so formation has to be checked state by state, typically with the relevant Secretary of State. A few types of businesses generally cannot be LLCs at all, such as banks and insurance companies.
Nothing on this page covers state filing fees, annual reports, franchise taxes or registered agent rules. Those vary by state and have to come from each state's own materials.
What this page does not cover
Three areas are deliberately left out, because the official rules were not verified for this page:
- S corporation election (Form 2553) — no eligibility rules or deadlines are stated here.
- Foreign-owned single-member LLCs, including Form 5472 reporting.
- Any state-level formation cost or ongoing state compliance requirement.
For a one-owner US LLC with a US individual owner and no employees, the short version stands: disregarded by default for income tax, Schedule C on your 1040, self-employment tax through Schedule SE, and corporate treatment only if you file Form 8832.