Yes, one person can own an LLC. It’s called a single-member LLC, and every state allows it. The structure gives you the same legal separation between personal and business assets that a multi-owner LLC provides, so if the business is sued or can’t pay its debts, creditors generally can’t reach your personal bank accounts, home, or car. What you gain in protection, you pay for in paperwork and taxes, and the protection itself depends on running the LLC like a real, separate business.
What a Single-Member LLC Actually Does for You
The state recognizes your LLC as a legal entity that exists apart from you. That separation is the whole point. A sole proprietor and the business are the same person in the eyes of the law, so a lawsuit or unpaid business loan can reach personal assets. An LLC puts a wall in between.
The wall is not unbreakable. Courts can disregard the LLC and hold you personally liable if you treat the business as an extension of yourself. Lawyers call this “piercing the veil,” and single-member LLCs are more exposed to it than multi-member LLCs because there’s no co-owner whose interests a court needs to preserve. The common triggers are mixing personal and business money in one account, keeping no business records, funding the LLC too thinly to cover foreseeable obligations, and using the entity to commit fraud.
Personal guarantees create another gap. Banks and many landlords will not lend to a new single-member LLC without your personal signature backing the loan or lease. Once you sign, limited liability does not apply to that specific debt. If the business defaults, the lender comes after you directly.
How You’ll Be Taxed by Default
For federal income tax purposes, the IRS treats a single-member LLC as a “disregarded entity” by default. The LLC does not file its own return. You report business income and expenses on Schedule C attached to your personal Form 1040, and the profit is taxed at your individual rate.1Internal Revenue Service. Single Member Limited Liability Companies
On top of income tax, you owe self-employment tax. A W-2 employee splits Social Security and Medicare taxes with their employer. As the owner of a single-member LLC, you pay both halves. The combined rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare.2Social Security Administration. Contribution and Benefit Base You can deduct the employer-equivalent half when calculating your adjusted gross income, but for many owners with steady profits, self-employment tax ends up larger than the income tax bill.
Nobody is withholding tax from what you earn, so the IRS expects quarterly estimated payments. You generally need to pay them if you’ll owe $1,000 or more at filing. Skipping quarterly payments triggers an underpayment penalty even if you pay the full amount in April. Paying at least 90% of the current year’s liability or 100% of last year’s through quarterly installments avoids the penalty.3Internal Revenue Service. Estimated Taxes
Electing S Corp Treatment When Profits Grow
The default tax setup works fine at low income levels. As profits climb, the self-employment tax bill gets heavy, and the LLC’s built-in flexibility becomes useful: you can change how it’s taxed without changing the legal entity.
The common move for a profitable single-member LLC is electing S corporation tax treatment by filing Form 2553.4Internal Revenue Service. About Form 2553, Election by a Small Business Corporation Under S corp treatment, you pay yourself a reasonable salary through payroll (with normal payroll taxes), and any remaining profit passes through as a distribution that isn’t subject to self-employment tax. On $120,000 of net income, if a reasonable salary for the work is $60,000, payroll taxes hit the $60,000 rather than the full $120,000.
The catch is administrative cost. You have to run payroll, file quarterly payroll returns, and prepare a separate Form 1120-S. The IRS also watches owner salaries, and setting yours too low to duck payroll tax can lead the agency to reclassify distributions as wages, with back taxes and penalties on top. A common rule of thumb is that the savings justify the complexity once net income consistently exceeds around $50,000. The election must be filed within two months and 15 days of the start of the tax year you want it to apply to.
How to Form a Single-Member LLC
The formation itself is not complicated. File Articles of Organization with your state’s business filing office, which is the Secretary of State in most states. State filing fees run from about $35 to $500. Once the state approves the filing, it issues a certificate of formation and the LLC exists.
Before you file, you’ll need a business name (distinguishable from existing entities and typically ending in “LLC,” “L.L.C.,” or “Limited Liability Company”),5U.S. Small Business Administration. Choose Your Business Name a registered agent with a physical street address in the state to receive legal documents, a principal business address, and your own name and address as the sole member.
Draft an operating agreement even though most states don’t require one for filing. It sets out how the business is governed and what happens if you sell or wind it down. It also becomes evidence, if anyone later tries to pierce the veil, that you ran the LLC as a genuine separate entity rather than a pocket.
Get an Employer Identification Number from the IRS. A single-member LLC with no employees that keeps default tax classification can technically use your Social Security number,1Internal Revenue Service. Single Member Limited Liability Companies but banks generally want an EIN to open a business account, and using one keeps your SSN off client and vendor paperwork. An EIN is mandatory if you hire employees or elect corporate tax treatment.6Internal Revenue Service. Employer Identification Number The application is free on the IRS website.
Open a dedicated business bank account as soon as the EIN comes through. Every business dollar in, every business expense out, from that one account. Paying personal bills from the business account, or vice versa, is the single easiest way to hand a future plaintiff the argument that you and the LLC are the same thing.
Keeping the LLC in Good Standing
Formation is not a one-and-done event. Most states require annual or biennial reports that update your address and registered agent on file. Report fees range from around $20 to several hundred dollars depending on the state. Miss a filing and the state can pull your good standing. Keep missing them and the state can administratively dissolve the LLC, which ends the liability protection going forward.
If the business operates in states beyond the one where you formed, you may need to register there as a “foreign LLC.” Having employees, an office, or local sales points toward registration. Each foreign registration carries its own filing fee and reporting cycle.
Where Single-Member Protection Is Weaker
Liability protection is meant to run both directions: the LLC shields you from business creditors, and in most states, your personal creditors can only get a “charging order” against your LLC interest, meaning they receive distributions if any are made but can’t seize ownership or force liquidation. That protection is strong when there are co-owners a court wants to protect. For a single-member LLC, some courts have allowed personal creditors to reach past the charging order and get at LLC assets directly. Delaware, Nevada, Wyoming, South Dakota, and Alaska have amended their statutes to extend full charging order protection to single-member LLCs. Where you form matters if this concern is real for you.
Licensed Professionals Have a Different Rulebook
If you’re a doctor, lawyer, accountant, architect, or another licensed professional, some states require a Professional LLC (PLLC) rather than a standard LLC. A PLLC works similarly but adds oversight from your licensing board and does not shield you from malpractice claims arising from your own professional work. Some states mandate PLLCs, others require a different entity type entirely, and a few don’t distinguish. Check with your state’s licensing board before filing.