LLC vs Sole Proprietorship: How Liability, Taxes, Paperwork and Costs Differ

An LLC and a sole proprietorship differ first under state law and then under federal tax rules. If you do business on your own without registering an entity, you are a sole proprietor by default, and the SBA's guide to business structures (opens in a new tab) explains that your business assets and debts are not separate from your personal ones. An LLC exists only after you file formation papers with a state, and that state's statute sets what members are and are not liable for. For federal income tax, the IRS treats a single-member LLC (opens in a new tab) as a disregarded entity unless it elects corporate treatment, so its activity usually lands on your own return. Formation fees, annual reports, franchise taxes and name rules vary by state.

Are you already operating as a sole proprietor?

You may already be one. The SBA explains that a person who conducts business without registering as another type of business is automatically considered a sole proprietor. There is no formation document and no separate entity. The business is you, operating under your own legal name or under a business name.

Using a business name does not change that. In Texas, an unincorporated business owner who uses an assumed name generally files an assumed-name certificate with the county clerk in each county where the business keeps an office, or where it conducts business if it has no Texas office, according to the Texas Secretary of State's Form 503 instructions (opens in a new tab). Entities such as LLCs file their assumed names with the Secretary of State instead. Texas assumed names are governed by Texas Business and Commerce Code chapter 71 (opens in a new tab), and the filing is a notice filing. It does not create an LLC, and it does not give you exclusive rights to the name. If exclusive rights to a name matter to you, the steps in our guide on how to trademark a name cover a separate federal process.

What changes legally when you form an LLC?

An LLC is a legal entity created under state law. Forming one usually requires a filing with the state, a name that meets the state's rules, a registered agent and a registered office. In Texas, the certificate of formation instructions (opens in a new tab) and Form 205 (opens in a new tab) call for the registered agent, the registered office and the governing persons. Other states use different names for the filing, such as articles of organization, and different requirements.

The owners of an LLC are called members. Once the entity exists, contracts, bank accounts, permits and tax registrations can be held in the LLC's name rather than yours. The step-by-step filing process is in our guides on how to start an LLC and how to start an LLC in Texas.

How does personal liability differ?

For a sole proprietor, the SBA states that business assets and liabilities are not separate from personal assets and liabilities, and the owner can be held personally liable for the business's debts and obligations. That is a general description from a federal agency. Contract terms, insurance, personal guarantees and the law of your state can all affect a particular claim.

An LLC changes the starting point, and the statute sets its limits. In Texas, Business Organizations Code section 101.114 (opens in a new tab) says a member is not liable for a debt, obligation or liability of the LLC solely because the person is or acts as a member. The word "solely" matters. The statute does not promise that every personal asset is protected from every claim. Your own conduct, a personal guarantee you sign for a lease or loan, certain taxes and other provisions of state law can still reach you. Other states have their own LLC statutes, so read the rule for the state where your LLC is formed.

How are both structures taxed federally?

At the federal level, the two often look alike. A sole proprietor reports business income and expenses on Schedule C, attached to Form 1040, as described in the IRS Schedule C instructions (opens in a new tab). Net earnings may also be subject to self-employment tax, reported on Schedule SE. The IRS self-employment tax page (opens in a new tab) sets the general filing threshold at $400 of net earnings.

A domestic single-member LLC is disregarded as separate from its owner for federal income tax unless it files Form 8832 to elect corporate classification. An individual owner generally reports the LLC's activity on Schedule C, Schedule E or Schedule F, depending on the activity. The IRS also states that the individual owner of a single-member LLC operating a trade or business is subject to self-employment tax in the same manner as a sole proprietor. So, forming an LLC does not by itself lower your federal taxes. Electing a different tax classification is a separate decision, and our comparison of an S corporation and an LLC covers that election.

An EIN, or employer identification number, follows its own rules. The IRS instructions for Form SS-4 (opens in a new tab) list the situations where a sole proprietor needs one, including having employees, having a qualified retirement plan and filing certain excise or employment tax returns. A single-member LLC that is disregarded generally uses the owner's SSN or EIN for income tax, but it must use its own name and EIN for employment tax and certain excise taxes. Banks and states may also ask for an EIN.

What state taxes and reports apply?

State taxes are separate from federal treatment, and Texas shows how far apart they can be. The Texas franchise tax applies to taxable entities, including Texas LLCs and entities with Texas nexus. Starting with the 2024 report year, an entity at or below the no-tax-due threshold no longer files a No Tax Due Report, but it must still file a Public Information Report (Form 05-102) or an Ownership Information Report (Form 05-167), according to the Texas Comptroller's filing requirements (opens in a new tab) and its information report page (opens in a new tab).

Franchise tax reports are generally due May 15 each year, per the Comptroller's franchise tax overview (opens in a new tab). The no-tax-due threshold was $2.47 million beginning with the 2024 report year and is $2.65 million for the 2026 and 2027 report years, according to Comptroller revenue figures (opens in a new tab). These figures change by report year.

A Texas sole proprietorship is not a taxable entity for franchise tax just because it does business. Its state obligations depend on what it does, and may include sales tax, employment tax or local taxes. Other states impose their own taxes and reports on LLCs, so check the tax agency in each state where you operate.

What does each structure cost?

A sole proprietorship has no state formation fee, though an assumed-name filing, local licenses and permits can carry their own charges. An LLC has a formation fee and, in many states, recurring filings. The figures below are published government charges in three states as of October 1, 2026. They are examples, not an estimate of what your business will spend.

California's Secretary of State also notes that an LLC may owe a separate minimum $800 annual tax to the California Franchise Tax Board. Beyond government fees, an LLC owner may pay for a registered agent service, local permits, insurance, accounting and legal help, so the filing fee is only one line in the budget.

What paperwork does an LLC require?

An LLC's paperwork starts with the state and continues each year. The usual pieces are:

• A formation document filed with the state, with a name that meets its rules.
• A registered agent and registered office.
• The governing persons or members the state asks for.
• An operating agreement or similar internal document, depending on state law.
• Annual or biennial reports where the state requires them.
• State tax registrations and reports, local licenses and permits, and sales tax registration where the activity calls for it.
• An EIN when the IRS requires one or a bank, employer account or other purpose needs it.

The operating agreement deserves a closer look. California's Secretary of State (opens in a new tab) says an operating agreement among members is required, but it is not filed with the Secretary of State. Texas calls this document a company agreement, and our guide to the Texas LLC operating agreement covers what it does and what Texas law supplies without one.

What paperwork does a sole proprietor require?

A sole proprietor generally files no state formation document. The business may still need an assumed-name or DBA filing if it uses a name other than the owner's, an EIN in the situations the IRS lists, local business licenses, sales tax registration, employer registrations once workers are hired, and professional or industry licenses. Insurance and written contracts belong on the list as well.

Banks, landlords, insurers and licensing boards set their own document requirements. A sole proprietor may be asked for identification, an assumed-name certificate, a tax identification number or a license. An LLC may be asked for its certificate of formation, its IRS EIN confirmation, its operating agreement or ownership information, and proof of insurance. A certificate of formation proves the state filing; it does not prove that insurance exists or that a professional license is held.

What happens when a sole proprietor becomes an LLC?

A sole proprietorship is not a separate entity, so it cannot simply be renamed into an LLC. You form a new LLC under state law and then move the business into it. Texas conversion procedures described on the Secretary of State's mergers and conversions page (opens in a new tab) apply to existing entities, not to an informal sole proprietorship.

The transition usually touches several parts of the business:

• Filing the LLC formation document.
• Obtaining or confirming an EIN; the IRS Form SS-4 instructions say a change in business structure or ownership can affect EIN requirements.
• Opening a business bank account in the LLC's name.
• Assigning or replacing contracts and transferring business assets.
• Updating invoices, customer records, licenses, permits and sales tax registrations.
• Getting insurance coverage in the LLC's name (see which business insurance to buy first (opens in a new tab)).
• Reviewing leases, financing documents and any personal guarantees.
• Filing or updating an assumed-name certificate and closing or updating the old sole proprietor registrations.

Ask the IRS about the federal classification and EIN question, and ask the state filing office and licensing agencies about state records and permits.

Which office handles each step?

Different offices handle different parts of the change:

• Secretary of State: LLC formation, amendments, registered agent changes and entity assumed names. Texas forms are on the Secretary of State's site (opens in a new tab).
• County clerk: Texas assumed-name filings for unincorporated businesses.
• State tax agency: franchise tax, sales tax, permits and state reports. In Texas, that is the Comptroller (opens in a new tab).
• IRS: federal classification, Schedule C, Schedule SE, Form 8832 and EIN rules, through its small business and self-employed resources (opens in a new tab).
• City or county offices and licensing boards: local business licenses, permits and professional licenses.
• Tax professional: tax reporting, entity elections and accounting questions.
• Attorney: entity documents, contracts, asset transfers, liability questions and state-specific legal issues.

Frequently asked questions

These answers add a few details that come up after the main comparison.

Does a single-member LLC file Schedule C?

Generally, yes, when an individual owns it and it is treated as a disregarded entity. Depending on the activity, the owner may use Schedule E or Schedule F instead. A Form 8832 election for corporate classification changes the return the LLC files.

Does a Texas LLC file something every year?

Texas taxable entities, including LLCs, generally file a Public Information Report or Ownership Information Report each year. The franchise tax report itself depends on revenue and the report year, with a threshold of $2.65 million for the 2026 and 2027 report years.

Can I keep my sole proprietor EIN for the new LLC?

The IRS Form SS-4 instructions say a change in business structure or ownership can affect whether a new EIN is needed. A disregarded single-member LLC must also use its own name and EIN for employment and certain excise taxes. Confirm the answer for your situation with the IRS or a tax professional before you open accounts.

Does a DBA protect my personal assets?

No. In Texas, an assumed-name certificate is a notice that a person or entity is doing business under another name. It does not create an LLC or change who is liable for the business's debts.

Next step

If you are deciding between these structures or moving an existing business into an LLC, a business law attorney or tax professional can review the details for your state. You can find business law firms in the Counselado lawyer directory.