A sole proprietorship, an LLC, and a DBA get compared constantly, but only two of them are actually business structures. A sole proprietorship is what you automatically become the moment you start earning business income on your own. An LLC is a separate legal entity you create by filing paperwork with your state. A DBA is just a registered trade name that either one can operate under. The practical decision is between the sole proprietorship and the LLC, because that is the choice that determines whether a lawsuit against your business can reach your personal bank account.
What Each One Actually Is
A sole proprietorship exists by default. No filing creates it. The moment you start freelancing, selling products, or offering services for profit, you are a sole proprietor. You and the business are legally the same person, so every contract, every debt, and every legal claim against the business is a claim against you personally.
A limited liability company is a separate legal entity authorized by state law.1Internal Revenue Service. Limited Liability Company Once formed, the LLC has its own legal identity distinct from its owners, who are called members. The LLC can own property, sign contracts, and take on debt in its own name. When something goes wrong, the LLC’s obligations generally stay with the LLC rather than flowing through to the members’ personal finances.
A DBA — short for “doing business as,” also called a fictitious or assumed name — is not a structure at all. It is a name registration that lets an existing person or entity operate under a different name. If your legal name is Jane Doe and you want invoices to read “Bright Path Consulting,” you file a DBA. If your LLC is “JD Enterprises LLC” but you want to market a product line under a catchier name, same thing. The DBA itself provides no liability protection, no tax status, and no legal separation. It is cosmetic.
Liability: The Real Reason to Choose
This is where the structures diverge the most, and it is usually the deciding factor.
A sole proprietor has unlimited personal liability for everything the business does. If the business gets sued, if a client slips and falls, if a vendor demands payment on an overdue invoice, the creditor can go after your personal savings, your home equity, your car, and your investment accounts. There is no legal wall between you and the business, because you and the business are the same legal person. Filing a DBA changes none of this. It just puts a different name on the same unprotected structure.
An LLC creates a liability shield between the business and its members’ personal assets. If the LLC is sued or cannot pay its debts, only the assets owned by the LLC are generally at risk. Your personal bank account, your house, and your retirement savings sit on the other side of that wall. This protection is the main reason most small business owners form an LLC rather than operating as a sole proprietor.
How That Shield Gets Lost
The protection is not automatic and permanent. Courts can “pierce the veil” of an LLC and hold members personally liable when the LLC was not treated as a genuinely separate entity. The most common trigger is commingling funds: using the business account to pay personal expenses, running personal money through the business account, or failing to maintain any financial separation at all.2Legal Information Institute. Piercing the Corporate Veil
Other factors courts weigh include undercapitalizing the LLC with so little money that it could never realistically pay its obligations, signing contracts in your personal name instead of the LLC’s name, and failing to document significant business decisions. No single misstep automatically destroys the protection, but courts look at these together. The practical rule: keep a separate business bank account, keep personal spending out of it, and put important decisions in writing.
Insurance Still Matters
Even with an LLC, liability insurance remains important. The shield protects personal assets from business debts and lawsuits, but it does not stop lawsuits from happening, and it does not cover claims that fall outside the veil, such as personal guarantees on a business loan or professional malpractice. General liability and professional liability (errors and omissions) coverage protect the business itself from being wiped out by a single claim. For sole proprietors who choose not to form an LLC, insurance is essentially the only financial buffer between a lawsuit and personal ruin.
How Each One Is Taxed
The tax picture surprises most new business owners. Forming an LLC does not automatically change how you pay taxes.
Sole Proprietorship
All business income flows directly onto your personal tax return. You report revenue and expenses on Schedule C (Profit or Loss From Business), which attaches to your Form 1040.3Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship) Net profit is taxed at your ordinary income rate.
On top of income tax, sole proprietors owe self-employment tax, which funds Social Security and Medicare. The combined rate is 15.3%, broken into 12.4% for Social Security and 2.9% for Medicare.4Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) That rate represents both the employer and employee halves of payroll tax, since a sole proprietor fills both roles. The tax applies to 92.35% of net self-employment earnings.5Office of the Law Revision Counsel. 26 U.S. Code 1402 – Definitions The Social Security portion only applies to the first $184,500 of combined wages and self-employment income in 2026, while the Medicare portion has no cap.6Social Security Administration. Contribution and Benefit Base High earners pay an additional 0.9% Medicare surtax on self-employment income above $200,000 ($250,000 for joint filers).7Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
Single-Member LLC
By default, the IRS treats a single-member LLC as a “disregarded entity.” That means it is taxed exactly like a sole proprietorship. You file the same Schedule C, you owe the same self-employment tax, and your net profit hits your 1040 the same way.8Internal Revenue Service. Single Member Limited Liability Companies The liability protection is real, but the default tax treatment is identical to being a sole proprietor.
Multi-Member LLC
An LLC with two or more members defaults to partnership taxation. The LLC files Form 1065 (U.S. Return of Partnership Income), which is an informational return. The LLC itself generally pays no income tax.9Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income Instead, each member gets a Schedule K-1 showing their share of income, losses, and deductions, which they report on their personal return.10Internal Revenue Service. LLC Filing as a Corporation or Partnership
The S-Corp Election
This is where the LLC’s tax flexibility shows up. An LLC can elect to be taxed as an S corporation by filing Form 2553 with the IRS, without changing its legal structure.11Internal Revenue Service. Instructions for Form 2553 – Election by a Small Business Corporation Under S-corp treatment, the owner-employee must receive a “reasonable salary” subject to the full 15.3% payroll tax. Remaining profit can be distributed to the owner without owing self-employment tax on that portion. For a business netting $150,000, paying self-employment tax only on a $70,000 salary rather than the full amount can mean meaningful annual savings.
The IRS scrutinizes reasonable salary closely. Courts have rejected attempts to set artificially low salaries to minimize payroll tax.12Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers The salary needs to reflect what someone with your skills and responsibilities would earn in a comparable role. The election also brings payroll administration costs, so it typically pays off only when the business is generating enough profit above a reasonable salary to justify the added complexity. A sole proprietorship cannot make this election at all.
DBA
A DBA has no tax status of its own. Income earned under a DBA name gets reported on the tax return of whatever entity filed it. Sole proprietor’s DBA? Schedule C. LLC’s DBA? Whatever classification the LLC uses.
Quarterly Estimated Taxes
Sole proprietors, LLC members, and S-corp shareholders generally must make quarterly estimated tax payments if they expect to owe $1,000 or more when they file. The IRS splits the year into four payment periods, each with its own due date. Missing them triggers an underpayment penalty even if you end up owed a refund. You can usually avoid the penalty by paying at least 90% of your current-year tax liability or 100% of last year’s tax, whichever is smaller.13Internal Revenue Service. Estimated Taxes Unlike a W-2 job, nobody is withholding for you.
Setup and Ongoing Cost
Starting a sole proprietorship costs essentially nothing at the state level. You may need local business licenses or occupational permits depending on your industry and city, but there is no formation document to file.
Forming an LLC requires filing a document typically called Articles of Organization (some states use “Certificate of Organization” or “Certificate of Formation”) with your state’s Secretary of State. The filing covers the LLC’s name, a principal office address, and a designated registered agent who can accept legal documents on the LLC’s behalf. Filing fees run roughly $35 to $500 depending on the state. The registered agent must maintain a physical street address in your state of formation and be available during normal business hours, so a P.O. box does not qualify.
Filing a DBA happens at the county or state level, depending on where you live, with fees generally $25 to $100. Some jurisdictions also require you to publish the fictitious name in a local newspaper for several weeks, which can add anywhere from nothing to several hundred dollars.
Sole proprietorships and DBAs carry almost no recurring state-level obligations. You may need to renew local licenses or re-file the DBA every few years, but there are no annual reports and no state-level maintenance fees.
LLCs do have ongoing obligations. Most states require an annual or biennial report filed with the Secretary of State, with fees ranging from under $10 to several hundred dollars. A handful of states also impose an annual franchise or privilege tax on LLCs regardless of whether the business earned anything that year, running $50 to $800. Letting these lapse can result in the state administratively dissolving your LLC, which strips away your liability protection without any notice from a courtroom.
LLCs also benefit from having an operating agreement, the internal document that governs how the business runs: ownership percentages, how profits and losses are split, voting rights, what happens if a member leaves, and dissolution procedures.14U.S. Small Business Administration. Basic Information About Operating Agreements A few states require one. Even where it is not mandatory, skipping it leaves state default rules filling every gap, and those defaults rarely match what the members actually intended. For single-member LLCs, the operating agreement also helps show that the LLC is a real, separate entity rather than an alter ego of the owner.
Which One to Pick
The choice turns on how much liability risk you carry, how much you earn, and how you plan to grow.
- Low-risk freelancers and side hustlers can often operate as a sole proprietor with a DBA. A graphic designer working from home faces different risks than a contractor operating heavy equipment. If the worst realistic outcome of a mistake is a refund, the cost and hassle of an LLC may not be worth it yet.
- Anyone with meaningful liability exposure should form an LLC. If your work could injure someone, damage property, or produce losses clients would want to recover, the filing fee is a small price for keeping a business lawsuit away from your personal savings.
- Businesses earning well above a reasonable salary can benefit from the S-corp election on top of the LLC. Once net profit comfortably exceeds that salary, the self-employment tax savings can run into thousands per year. A tax professional can help with timing, because electing too early adds payroll costs that eat into the savings.
- Businesses seeking outside investment often outgrow the LLC. Venture capital firms and institutional investors generally prefer C-corporations. If you plan to raise multiple rounds, the LLC may be a stepping stone rather than a long-term home.
Nothing prevents starting as a sole proprietor and converting to an LLC later. The conversion involves filing Articles of Organization, obtaining a new EIN if you will have employees or multiple members, and transferring business assets. For a single-member LLC taxed as a disregarded entity, the IRS treats this as a non-event, since the assets are considered to still belong to the same taxpayer. The important thing is not waiting until a lawsuit forces the decision.
Closing the Business
Shutting down a sole proprietorship is simple. You stop operating, file your final Schedule C, pay outstanding taxes, and cancel local licenses or DBA registrations. There is no state dissolution process because no state filing created the business.
Dissolving an LLC takes more work. The members vote to dissolve following whatever procedure the operating agreement specifies, then the business enters a winding-up period where it pays off debts, closes accounts, files final tax returns, and distributes any remaining assets. You file Articles of Dissolution (or a similar document) with the Secretary of State, and some states require a tax clearance certificate before accepting the filing. Walking away without doing this leaves the LLC on the state’s books, which means annual fees and reports keep accruing and your name stays attached to an entity that can still be sued.