A single-member LLC operating agreement is a document you write for yourself as sole owner that spells out ownership, management authority, capital, tax treatment, and what happens if the business ends or you can’t run it. Most states don’t require you to file one anywhere, and a handful don’t require you to have one at all. Skip it anyway and your LLC runs on your state’s default statute, which rarely matches what you’d actually choose, and you lose your best piece of evidence that the LLC is a real, separate entity rather than you under a different name.
Why Have One If the State Doesn’t Require It
The point of forming an LLC is the wall between your personal assets and the business’s debts. Courts can tear that wall down through what’s sometimes called piercing the veil if they decide you and the LLC are effectively the same thing. A signed operating agreement is one of the formalities that shows you treat the company as its own entity, alongside a separate bank account, formal financial records, and never mixing personal and business funds. The agreement is what ties those commitments together on paper.
Banks routinely require a signed copy before opening a business checking account for the LLC. Investors, lenders, and anyone asking you to prove your authority to sign on behalf of the company will ask for it too. The SBA notes that without an operating agreement, an LLC can resemble a sole proprietorship in the eyes of the law, which puts the personal liability protection you formed the LLC to get at risk.1U.S. Small Business Administration. Basic Information About Operating Agreements
Every state has a default LLC statute that fills in the gaps when an operating agreement is silent or doesn’t exist. Those rules are generic by design. They control profit distribution timing, dissolution triggers, management authority, and what happens if the owner dies or becomes incapacitated. Writing your own agreement is how you replace those defaults with provisions that fit your business.
What to Put in the Agreement
A single-member agreement doesn’t have to be long. It does have to cover specific ground. The provisions below belong in every version:
- LLC identification: the legal name exactly as it appears on your articles of organization, principal address, state of formation, and formation date.
- Registered agent: the name and address of the person or service designated to receive legal documents for the LLC.
- Business purpose: a short description of what the LLC does. Many owners use broad language like “any lawful business activity” to preserve flexibility.
- Member information: your full legal name, address, and ownership percentage, which is 100% for a single-member LLC.
- Capital contributions: what you’ve put in to start the business, whether cash, equipment, intellectual property, or other assets, and the agreed value of anything non-cash.
- Management structure: whether the LLC is member-managed or manager-managed, and the scope of authority over day-to-day decisions.
- Distributions: how and when you can take profits out, plus any restrictions you want to impose, such as a minimum cash reserve.
- Tax classification: the LLC’s elected federal tax status and any intention to file Form 8832 or Form 2553.
- Record-keeping: what financial and legal records the LLC will maintain, where, and for how long.
- Amendments: the process for changing the agreement later.
- Dissolution: the events that trigger winding down and the steps for doing so.
- Succession: what happens if you die or become incapacitated, including who takes over management and who inherits the membership interest.
- Indemnification: protection for you personally against claims arising from good-faith actions on behalf of the LLC.
The SBA identifies several of these as core components, including ownership percentages, voting rights, distribution of profits and losses, and procedures for transferring interest or handling a member’s death.1U.S. Small Business Administration. Basic Information About Operating Agreements
Member-Managed or Manager-Managed
Even with one owner, your agreement has to declare how the LLC is managed. The choice has real consequences for succession and for how third parties interact with the business.
A member-managed LLC means you directly control all business decisions and have authority to sign contracts, open accounts, and bind the company. This is the default in most states if your agreement doesn’t say otherwise, and it’s the simpler option when you’re actively running things.
A manager-managed LLC separates ownership from operational control. You can name yourself manager and keep the same practical authority, but the structure becomes useful if you later want someone else running the company without transferring ownership. It matters most for incapacity. If you’re the sole member of a member-managed LLC and you can’t act, nobody has legal authority to keep the business running. In a manager-managed structure, your agreement can name a successor manager who steps in automatically, and that single provision can keep the business from freezing while your family or estate works through probate.
Documenting What You’ve Put In
Your agreement should state exactly what you’ve contributed and what it’s worth. For cash, that’s the dollar amount and the date. For non-cash contributions, describe each asset, state the agreed value, and explain the valuation method. For high-value property, an independent appraisal creates a defensible record if the IRS or a creditor later questions the value. Transferring property to an LLC usually doesn’t trigger a taxable event, but exceptions exist for encumbered property and other situations, so document the tax basis of anything you contribute.
Services are a common misconception. You can obviously work to get the LLC running, but most state LLC statutes don’t recognize services as a formal capital contribution the way they recognize cash or property. If you want to document sweat equity, note it separately rather than listing it alongside cash and property.
How the LLC Will Be Taxed
The agreement should state the federal tax treatment the LLC will use. This is not just housekeeping. The choice affects your self-employment tax bill and how you file.
Disregarded Entity (Default)
The IRS treats a single-member LLC as a disregarded entity by default, which means it looks through the LLC and treats you as a sole proprietor. You report business income and expenses on Schedule C of your personal Form 1040.2Internal Revenue Service. Single Member Limited Liability Companies You also pay self-employment tax at 15.3% on net earnings: 12.4% for Social Security and 2.9% for Medicare.3Internal 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; the Medicare portion has no cap.4Social Security Administration. Contribution and Benefit Base Half of your self-employment tax is deductible on Form 1040, which reduces your adjusted gross income.
S-Corporation Election
If the LLC is generating enough profit, electing S-corporation tax treatment by filing IRS Form 2553 can lower your self-employment tax. The election doesn’t change the legal structure of the LLC. It changes only how the IRS taxes it.5Internal Revenue Service. Limited Liability Company (LLC) You split your income between a reasonable salary (subject to payroll taxes) and distributions (not subject to self-employment tax). The tradeoff: you must run payroll for yourself, file a separate corporate return on Form 1120-S, and pay yourself a salary the IRS considers reasonable for the work you do. Underpaying yourself to maximize distributions is one of the most common audit triggers.
The deadline to file Form 2553 is two months and 15 days after the beginning of the tax year the election should cover. For a calendar-year LLC, that’s March 15. Stating the intent to elect S-corp treatment in the operating agreement creates a paper trail showing the decision was deliberate and timely.
C-Corporation Election
Filing Form 8832 elects C-corporation treatment.6Internal Revenue Service. About Form 8832, Entity Classification Election The LLC then pays a flat 21% federal corporate tax on profits, and you pay personal income tax again on any distributions. Double taxation makes C-corp status a poor fit for most single-member LLCs. It can make sense when the business retains most of its earnings or qualifies for certain corporate tax credits.
Planning for What Happens Next
Succession is where single-member operating agreements earn their keep. If you’re the only person on the LLC and something happens to you, the business can stop cold. Nobody can sign checks, manage contracts, or access the bank account without the legal authority your agreement can set up in advance.
Name a successor manager or spell out how one will be appointed if you die or can’t manage the business. State who inherits your membership interest. The two roles don’t have to go to the same person. A trusted business associate might run operations while your spouse inherits the economic interest. Without these provisions, your family will likely need probate to gain control of the LLC, and the business may not survive the delay.
The dissolution section covers voluntary closure. Spell out how remaining debts get paid, how assets get distributed, what state filings need to happen, and who handles those steps.
Keeping the Liability Shield Intact
The agreement alone doesn’t guarantee liability protection. It’s one piece of a pattern courts look at when deciding whether to treat you and the LLC as separate. The agreement creates the rules. Following them is what protects you.
The most common way solo LLC owners lose their protection is commingling funds: using the business account for personal expenses, paying personal debts with business money, running business transactions through a personal credit card. Once the line between your finances and the LLC’s gets blurry, a court can conclude the LLC is just your alter ego and hold you personally responsible for its debts.
Address this directly in the agreement by requiring a separate bank account, prohibiting commingling, and establishing a process for taking money out. Then follow those rules. An agreement that requires separate accounts but sits in a drawer while you run everything through one checking account won’t help you. Other supporting formalities include keeping financial records, documenting major business decisions in writing, making sure contracts run between the LLC (not you personally) and third parties, and capitalizing the business well enough to meet its own obligations.
Drafting, Signing, and Storing It
Gather the LLC’s legal name exactly as it appears on your articles of organization, your EIN, your registered agent’s name and address, and your own details. Settle on your management structure, document your contributions, and decide on tax classification before you start writing.
You can draft from scratch or start with a template. Either way, don’t fill in blanks mechanically. Read every provision and make sure it reflects how you actually plan to run the business. A template that requires annual member meetings is fine for a multi-member LLC, but it creates an obligation you’ll have to follow (even if that means meeting with yourself and documenting it) to maintain the formality. Only include provisions you intend to honor.
Once drafted, sign the agreement as the sole member. It does not need to be notarized. It does not get filed with any state agency. Keep the signed original with your articles of organization, EIN confirmation letter, and other core business records.1U.S. Small Business Administration. Basic Information About Operating Agreements Make a backup stored separately. Your bank, your accountant, and your attorney should each have a copy.
Review the agreement at least once a year and whenever something significant changes: a new business activity, a shift in tax strategy, an updated succession plan, or a major capital contribution. When you amend it, sign and date the amendment and attach it to the original. The amendment clause you wrote at the start governs that process, which is why getting that clause right the first time matters.