Single-Member LLC: How It Works and Is Taxed
A single-member LLC is a limited liability company with one owner. For income tax, the IRS treats it as a "disregarded entity" by default - the LLC files no separate income tax return, and the owner reports the business's profit or loss on their own Form 1040, usually on Schedule C. The owner may use their SSN or the LLC's EIN, but the LLC must get its own EIN if it has employees or owes certain excise taxes. It can also elect to be taxed as a corporation on Form 8832.
Quick Answer
- What it is
- An LLC with exactly one owner (member)
- Default tax status
- Disregarded entity - separate from its owner for income tax is ignored
- Where income is reported
- Owner's Form 1040, usually Schedule C (also Schedule E or F)
- Tax ID for income tax
- Owner's SSN or the LLC's EIN
- Must get its own EIN if
- It has employees or files excise tax Forms 720, 730, 2290, or 11-C
- Self-employment tax
- 15.3% on net earnings for an individual owner (Schedule SE)
- Optional election
- Taxed as a corporation via Form 8832 (then possibly S corp via Form 2553)
What a Single-Member LLC Is
A single-member LLC (SMLLC) is a limited liability company with exactly one owner. It is a full LLC in state law - formed the same way, with the same liability shield - but because it has one member rather than two or more, the IRS gives it a different default tax treatment. The IRS notes that "most states also permit 'single-member' LLCs, those having only one owner," so the SMLLC is a standard, widely available structure, not a special variant.
The single member can be an individual or another company. When the owner is a person, the SMLLC is the direct alternative to a sole proprietorship: it gives the owner limited liability while keeping the simple, pass-through tax filing of a one-person business. That is why so many freelancers, consultants, and solo operators choose it. For the broader entity overview, see what is an LLC.
The key thing to understand is that "single-member LLC" is a state-law entity, while "disregarded entity" is a federal tax classification the IRS applies to it by default. The same company is one entity in your state's business registry and, for income tax, is looked through to its owner. Those two facts pull in opposite directions - separate for liability, combined for income tax - and almost everything below follows from that split.
Default Tax: The Disregarded Entity
A single-member LLC is a "disregarded entity" by default for federal income tax. The IRS states it directly: "For income tax purposes, an LLC with only one member is treated as an entity disregarded as separate from its owner, unless it files Form 8832 and affirmatively elects to be treated as a corporation." In plain terms, the IRS looks through the LLC and taxes the owner as if the LLC did not exist - while state law still treats the LLC as a separate entity for liability.
"Disregarded" is only an income tax label; it does not dissolve the company or waive its liability shield. It simply means the SMLLC does not file its own income tax return. Instead, its income flows onto the owner's return. This is the single most important fact about how a one-owner LLC is taxed, and it is why forming an SMLLC usually adds no new income tax return to your filing.
The classification is automatic - you do not apply for disregarded-entity treatment; it is the default the IRS assigns to any one-member LLC that has not elected otherwise. The only way to change it is to affirmatively elect corporate treatment on Form 8832, discussed below. Until you do, the IRS treats the LLC and its owner as one taxpayer for income tax, full stop.
How the Owner Reports Income (Schedule C)
The owner of a disregarded single-member LLC reports the business's results on their personal return. Per the IRS, when the single member is an individual, business activities are reported on the owner's return using one of three schedules depending on the activity:
- Schedule C (Form 1040), Profit or Loss From Business - for most trades and businesses. See our Schedule C guide.
- Schedule E - for supplemental income or loss, such as rental real estate.
- Schedule F - for farming income or loss.
Because the owner is in business for themselves, they generally owe self-employment tax on the net earnings. The IRS sets the self-employment tax rate at 15.3% - "12.4% for social security" plus "2.9% for Medicare" - and requires it once "net earnings from self-employment … were $400 or more," reported on Schedule SE. Net profit from Schedule C flows to page 1 of Form 1040 and into that self-employment tax calculation. Estimate your own with our SE tax calculator.
EIN Rules for a Single-Member LLC
A single-member LLC does not always need its own EIN, but often gets one. For income tax reporting as a disregarded entity, the owner may use either the owner's Social Security number or an Employer Identification Number. The LLC is, however, "required to use its name and EIN" - not the owner's SSN - for certain federal taxes.
The IRS requires the SMLLC to obtain its own EIN in two situations: "if it has any employees or if it will be required to file any of the excise tax forms." Beyond those requirements, many single-member LLC owners get an EIN voluntarily, because most banks require one to open a business account and it keeps the owner's SSN off vendor and payroll paperwork. The EIN is free and can be requested on Form SS-4; see how to get an EIN or the EIN glossary entry.
A practical tension is worth flagging: because a disregarded SMLLC may use the owner's SSN for income tax, and separately must use its own EIN for employment and excise tax, the same company can legitimately have two identifiers in play. Once the LLC has an EIN, most owners use it consistently for banking and vendor forms to keep the SSN private, even where the IRS would still accept the SSN for income-tax reporting. State registration or state tax accounts may also require the EIN, which is one more reason solo owners commonly obtain one even when federal rules do not force it.
Employment and Excise Taxes: A Separate Entity
For employment and certain excise taxes, a single-member LLC is treated as a separate entity - the opposite of its income tax treatment. The IRS states that "a single-member LLC that is classified as a disregarded entity for income tax purposes is treated as a separate entity for purposes of employment tax and certain excise taxes." This split is a common point of confusion, so it is worth stating plainly: the SMLLC is disregarded for income tax but respected for payroll and excise tax.
The practical effect is in the table below. If the LLC has employees, it files and pays employment taxes under its own name and EIN. If it owes excise taxes, the same applies. The specific excise forms the IRS lists are Forms 720, 730, 2290, and 11-C.
| Tax purpose | How the SMLLC is treated | Whose ID / return |
|---|---|---|
| Income tax (default) | Disregarded - ignored as separate | Owner's Form 1040 (Schedule C/E/F); owner's SSN or LLC EIN |
| Self-employment tax | Owner is self-employed | Owner's Schedule SE; 15.3% on net earnings |
| Employment tax (has employees) | Separate entity | LLC's name and EIN - must obtain an EIN |
| Certain excise taxes | Separate entity | LLC's EIN; Forms 720, 730, 2290, or 11-C |
| After corporate election | Taxed as a corporation | LLC files Form 1120 (C corp) or 1120-S (S corp) |
Electing Corporation or S Corporation Status
A single-member LLC can choose to be taxed as a corporation instead of a disregarded entity. The IRS allows the SMLLC to "file Form 8832 and affirmatively elect to be treated as a corporation." Filing Form 8832, Entity Classification Election, switches the LLC to C corporation tax treatment, after which it files its own corporate return.
An LLC that wants S corporation treatment files Form 2553. The IRS describes an S corporation as one that elects "to pass corporate income, losses, deductions, and credits through to their shareholders," letting owners "avoid double taxation." Owners often make this election to reduce self-employment tax once profits are consistently high, paying themselves a reasonable wage and taking the rest as a distribution. Whether it saves money depends on your numbers; compare the trade-offs in S corp vs LLC. This is general information, not tax advice for your situation.
Liability Protection for a Single-Member LLC
A single-member LLC keeps the limited liability shield even though it is disregarded for income tax. Being "disregarded" is a federal tax classification only; it does not merge the business into the owner for liability purposes. Under the state LLC statute, the SMLLC remains a separate legal entity, so the owner's personal assets are generally protected from business debts - the same protection a multi-member LLC provides.
That protection depends on treating the LLC as genuinely separate. As with any LLC, a court can "pierce the veil" if the owner commingles personal and business funds, undercapitalizes the company, or uses it to commit fraud. For a single-owner business the discipline matters more, because there is no co-owner to enforce separation: keep a dedicated business bank account, sign contracts in the LLC's name, and keep clean records. Adopting an operating agreement - even for one owner - is one more piece of evidence that the entity is run apart from your personal affairs.
Single-Member LLC vs. Sole Proprietorship
For income tax, a disregarded single-member LLC and a sole proprietorship file the same way: the owner reports business profit on Schedule C of Form 1040 and pays self-employment tax at 15.3% on net earnings. The tax result is essentially identical, which surprises many owners who expect the LLC to change their taxes - by default, it does not.
The difference is liability. A sole proprietor is, per the SBA, "held personally liable for the debts and obligations of the business," with no shield between business and personal assets. A single-member LLC interposes a separate legal entity, so the owner's personal assets are generally protected. In short, the SMLLC gives a solo owner the sole proprietor's simple pass-through tax filing plus a liability shield the sole proprietorship lacks - the main reason to choose it. See sole proprietorship vs LLC and how to form an LLC for the setup steps.
Related Terms
- What is an LLC?
- How to form an LLC
- How to get an EIN
- What is an EIN?
- Schedule C (Form 1040)
- Self-employment tax
- S corp vs LLC
- EIN (glossary) · Sole proprietorship vs LLC
Frequently Asked Questions
How is a single-member LLC taxed?
By default it is a disregarded entity: the IRS ignores it for income tax and the owner reports the business's profit or loss on their own return, usually Schedule C of Form 1040. It can instead elect corporate treatment on Form 8832.
What is a disregarded entity?
A disregarded entity is a business the IRS treats as not separate from its owner for income tax. The IRS says a one-member LLC is disregarded as separate from its owner unless it elects corporate treatment on Form 8832.
Does a single-member LLC need an EIN?
Not always for income tax, where the owner's SSN or EIN may be used. But the LLC must get its own EIN if it has employees or files excise tax Forms 720, 730, 2290, or 11-C. Many owners get one for a business bank account.
Do I file a separate tax return for my single-member LLC?
Usually no. As a disregarded entity, the LLC files no separate income tax return; the owner reports its income on their Form 1040, typically Schedule C, E, or F. A corporate election changes this.
Does a single-member LLC pay self-employment tax?
Generally yes. An individual owner pays self-employment tax on net earnings at 15.3% (12.4% Social Security plus 2.9% Medicare), on Schedule SE, once net earnings reach $400.
Does a single-member LLC protect my personal assets?
Yes, the state-law liability shield still applies even though the LLC is disregarded for income tax. Disregarded is only a federal tax label; it does not remove the limited liability the state LLC statute provides.
Sources
- IRS - Single Member Limited Liability Companies (disregarded entity default; Schedule C/E/F; own EIN for employees/excise; separate entity for employment and excise tax).
- IRS - Limited Liability Company (LLC) (single-member LLCs permitted; default classification; Form 8832).
- IRS - About Schedule C (Form 1040), Profit or Loss From Business.
- IRS - About Schedule SE (Form 1040), Self-Employment Tax.
- IRS - Self-Employment Tax (15.3%; 12.4% Social Security + 2.9% Medicare; $400 threshold).
- IRS - Self-Employed Individuals Tax Center (Schedule C and Schedule SE reporting; $400 filing threshold).
- IRS - About Form 8832, Entity Classification Election.
- IRS - About Form 2553, Election by a Small Business Corporation.
- IRS - S Corporations (pass-through election; avoids double taxation).
- IRS - Employer Identification Number (who needs an EIN).
- IRS - About Form SS-4, Application for Employer Identification Number.
- IRS - About Form 1040, U.S. Individual Income Tax Return.
- Cornell Legal Information Institute - Limited Liability Company (LLC) (limited liability; pass-through taxation).
LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. This page is information, not advice. Tax rules, forms, and thresholds change; verify current requirements with the IRS and your state before acting.