A single-member LLC is a disregarded entity for federal income tax purposes, not a partnership. Federal tax law defines a partnership as an unincorporated business carried on by two or more people, so a company with one owner cannot qualify.1Office of the Law Revision Counsel. 26 USC 761 – Terms Defined The IRS looks straight through the LLC and taxes all of its income, expenses, and liabilities directly to you.2Internal Revenue Service. Single Member Limited Liability Companies Your state-law liability shield still works; the disregarded label applies only to federal income tax.
Why Partnership Classification Is Off the Table
You cannot form a partnership with yourself. That single structural rule is what settles the question. Even if you draft an operating agreement that reads like a partnership agreement, with profit-sharing language and capital account provisions, a solo LLC stays in the disregarded category. Subchapter K of the tax code — the partnership rules covering capital accounts, basis adjustments, and how income is divided among partners — doesn’t reach you until a second owner actually joins the company.
What “Disregarded Entity” Means Day to Day
You don’t file anything to receive disregarded-entity status. It attaches automatically the moment you form a single-member LLC and stays in place unless you affirmatively elect corporate treatment on Form 8832 or S-corporation treatment on Form 2553.3Internal Revenue Service. LLC Filing as a Corporation or Partnership
All business activity goes on your personal Form 1040. Which schedule you use depends on the type of business:4Internal Revenue Service. Schedules for Form 1040 and Form 1040-SR
- Schedule C for most business and professional income, which is what the majority of single-member LLC owners file.
- Schedule E for rental real estate, royalties, and similar supplemental income.
- Schedule F for farming.
That is substantially simpler than a multi-member LLC’s filing burden. A partnership has to file Form 1065 as a separate entity return and issue a Schedule K-1 to each partner reporting that partner’s share of income, deductions, and credits.5Internal Revenue Service. Instructions for Form 1065 – U.S. Return of Partnership Income As a disregarded single-member LLC, you skip both.
Self-Employment Tax
Because the income flows to you as an individual, net earnings from the business are also self-employment income. The combined rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare.6Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) The Social Security portion applies only to net earnings up to $184,500 in 2026; Medicare has no cap.7Social Security Administration. Contribution and Benefit Base Once your net self-employment income clears $200,000 ($250,000 if you file jointly), an Additional Medicare Tax of 0.9% applies to the excess. Total self-employment tax is figured on Schedule SE, attached to your 1040.
Estimated Payments
Nobody withholds tax from your business income, so you generally have to make quarterly estimated payments if you expect to owe $1,000 or more after withholding and refundable credits.8Internal Revenue Service. Estimated Tax for Individuals For calendar-year filers, the 2026 due dates fall on April 15, June 15, September 15, and January 15, 2027. You can skip the January payment if you file your 2026 return and pay the full balance by February 1, 2027. Missing a deadline can trigger an underpayment penalty based on the shortfall and how long it stayed unpaid.9Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
One Place the LLC Is Not Disregarded: Payroll and Excise Tax
The disregarded label applies to income tax. For federal employment taxes and certain excise taxes, the IRS treats the LLC as a separate entity, and it has done so for wages paid since January 1, 2009.2Internal Revenue Service. Single Member Limited Liability Companies If your LLC has employees, the LLC — not you personally — is the employer. It reports and pays payroll taxes in its own name using its own EIN. The same is true for excise tax filings.
An EIN is required whenever the LLC has employees or excise tax obligations. A single-member LLC with neither can file income tax under the owner’s Social Security number and doesn’t need a separate EIN.
When You Might Want to Override the Default
You can leave the disregarded default behind by electing corporate treatment. Two paths exist, and they produce very different tax outcomes.
Filing Form 8832 elects C-corporation treatment. The IRS treats the election as if you contributed the LLC’s assets and liabilities to a corporation in exchange for stock.10Internal Revenue Service. Limited Liability Company – Possible Repercussions The LLC then files Form 1120 and pays corporate income tax, and distributions you take may be taxed again as dividends on your personal return. Once elected, you generally cannot switch back for 60 months.
Filing Form 2553 elects S-corporation treatment. Income passes through to you, avoiding the double tax of a C-corporation, and only the salary you pay yourself is subject to payroll tax rather than the entire net profit. The IRS expects that salary to be reasonable for the work you do. To qualify, the LLC must be domestic, have no more than 100 shareholders, maintain a single class of stock, and have only eligible shareholders (individuals, certain trusts, and estates, but not partnerships or corporations).11Internal Revenue Service. S Corporations The election is due no later than two months and 15 days after the start of the tax year you want it to apply, or any time during the preceding year.12Internal Revenue Service. Instructions for Form 2553
What About an LLC Owned by You and Your Spouse
An LLC co-owned by spouses is generally treated as a multi-member entity, meaning a partnership by default. Two exceptions are worth knowing because people commonly assume they apply.
The qualified joint venture election under Section 761(f) lets married couples running a business together file two Schedule Cs instead of a partnership return. It is not available to businesses organized as a state-law entity, so an LLC does not qualify.13Internal Revenue Service. Election for Married Couples Unincorporated Businesses
In community property states, Revenue Procedure 2002-69 takes a different approach. If the LLC is owned entirely by a married couple as community property and no one else would be treated as an owner for federal tax purposes, the IRS will accept whichever classification the couple uses on their return, either disregarded entity or partnership.14Internal Revenue Service. Classification of Certain Business Entities That lets spouses in those states keep disregarded-entity treatment and avoid partnership filing.
What Changes If You Add a Second Owner
The moment another person becomes a member of your LLC, disregarded status ends and the LLC defaults to partnership classification.15Internal Revenue Service. Publication 3402 – Taxation of Limited Liability Companies Several compliance items follow:
- Get a new EIN. The classification change from sole proprietorship to partnership triggers the requirement for a new number.16Internal Revenue Service. When to Get a New EIN
- File Form 1065 each year. For calendar-year filers, the deadline is March 15, a month before the individual return is due.17Internal Revenue Service. Starting or Ending a Business
- Issue a Schedule K-1 to each member showing their share of income, deductions, and credits.5Internal Revenue Service. Instructions for Form 1065 – U.S. Return of Partnership Income
- Update the operating agreement to reflect ownership percentages, allocation of profits and losses, management responsibilities, and how future membership changes will be handled.
The LLC also picks up Subchapter K in full: capital accounts, basis rules, and distributive shares. Each member reports their distributive share on their personal return whether or not the partnership actually distributes any cash.18Internal Revenue Service. Partners Instructions for Schedule K-1 (Form 1065) The way the new member joins — buying part of your interest versus contributing new capital — also carries its own tax consequences that are worth working through with a tax professional before the transaction closes.15Internal Revenue Service. Publication 3402 – Taxation of Limited Liability Companies