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 places it in 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 the quarterly estimated tax guide. State fees and taxes vary and aren't included.
The $80,000 freelancer in the quarterly estimated tax example owes $11,304 in self-employment tax and $5,344 in federal income tax, $16,648 in total, whether they operate as a sole proprietor or through a single-member LLC with default classification.
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 tax decision is 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. I go through the numbers in S Corp Election for Freelancers: When It Makes Sense. To test your own profit and salary, try the S corp tax savings calculator.
Married couples: qualified joint venture or LLC?
For a couple, the choice of structure matters more. According to the IRS, a business that a married couple owns and runs together is generally a partnership for federal tax purposes. That means a partnership return and K-1s, even without an LLC.
The alternative is a qualified joint venture (QJV). It’s available when:
- the only members are the two spouses, filing a joint return,
- both spouses materially participate in the business, and
- both elect not to be treated as a partnership.
You make the election on your joint Form 1040: split the business’s income and expenses by each spouse’s interest, and each spouse files their own Schedule C (and Schedule SE, if required). You’re then two sole proprietors for federal tax purposes. A QJV generally doesn’t need an EIN unless it has employees or excise taxes, and it can’t keep using an EIN the partnership already had. Once made, the election can only be revoked with IRS permission.
A business held in an LLC doesn’t qualify. The IRS limits the QJV to businesses owned by the spouses directly, “not in the name of a state law entity.” Spouses in community property states have separate rules for an LLC they own together, covered in the FAQ below.
Example: $100,000 run 50/50
Say a couple jointly runs a business that nets $100,000, split equally. As a QJV, each spouse reports $50,000 on their own Schedule C:
- 1$14,129
One Schedule C in one spouse's name
$100,000 × 92.35% × 15.3%
- 2$7,065
QJV, spouse A
$50,000 × 92.35% × 15.3%
- 3$7,065
QJV, spouse B
$50,000 × 92.35% × 15.3%
- 4$14,130
QJV total
2026 self-employment tax rates from the Form 1040-ES worksheet. Both figures are below the $184,500 Social Security wage base, so the total is the same, apart from $1 of rounding (each Schedule C is rounded separately).
The total self-employment tax is the same, give or take $1 of rounding. What changes is whose Social Security record gets the credit: the IRS notes that reporting a shared business on one spouse’s Schedule C credits only that spouse. With a QJV, both earn credit. Each spouse also has their own net earnings, which is what lets both of you contribute to a retirement plan. See Can My Spouse Contribute to My Solo 401(k)?
A two-member LLC, briefly
An LLC with two or more members is a partnership by default (spouses in community property states have the separate option in the FAQ below). It files Form 1065, due by the 15th day of the 3rd month after its tax year ends: March 15 for a calendar year, per the Form 1065 instructions. The late-filing penalty is charged per partner, per month, for up to 12 months. For returns due in 2027, it’s $260 a month for each partner, per Rev. Proc. 2025-32. So a two-member LLC that files its 2026 return one month late owes $520.
If you do form an LLC: the federal checklist
- Form the LLC with your state first. The IRS says an EIN application filed before the entity exists may be delayed.
- Decide whether you need a new EIN. A single-member LLC can keep using your sole proprietor EIN if it doesn’t elect corporate or S corporation status and has no employees or excise taxes, per the IRS page When to get a new EIN
- Don’t file Form 8832 for default treatment. Per the IRS LLC page, a one-member LLC is disregarded unless it files Form 8832 to elect corporate treatment. Form 8832 is only for changing the default.
- Only consider Form 2553 once the numbers work. The S corporation deadline and the math are in S Corp Election for Freelancers.
Common mistake: one Schedule C for a couple’s business
The IRS treats a jointly owned and operated business as a partnership unless the spouses elect QJV status. Filing one Schedule C in one name also leaves the other spouse without Social Security credit.
