When you form an LLC, the state gives you a certificate and a filing number, but it does not hand you a rulebook for running the business. That rulebook is the LLC operating agreement — a written document that spells out who owns the company, who makes decisions, and how money moves in and out. If you skip it, you are letting your state’s default LLC rules decide those questions for you, and those defaults rarely match what real owners actually want.
An LLC operating agreement is an internal document. You do not file it with the state in most cases, and you do not need a lawyer to make it valid, though a lawyer’s review is money well spent once real money or partners are involved. What matters is that it exists, that it is signed by every member, and that it reflects how your business really works.
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Do you legally need one?
Only a handful of states require an LLC operating agreement by law. California, Delaware, Maine, Missouri, and New York are the commonly cited ones — New York, for example, requires LLCs to adopt a written operating agreement within 90 days of formation. In every other state it is optional on paper.
Optional does not mean unnecessary. Banks routinely ask for a copy of your operating agreement before they open a business bank account, especially for a multi-member LLC. Courts look at it when ownership is disputed. And if your business ever takes on an investor, a partner, or a loan, the first document anyone asks for is usually this one. Writing it after a dispute starts is too late; it has to be signed while everyone still agrees.
What to put in an LLC operating agreement
1. The basics: name, purpose, and registered agent. Start with the LLC’s legal name, its principal place of business, the name and address of its registered agent, and a plain statement of what the business does. This section also states the effective date and whether the LLC has a fixed end date or continues until the members dissolve it.
2. Ownership and member contributions. List every member and their ownership percentage, then record what each person put in — cash, equipment, a client list, or work. A member who contributes $20,000 in cash and a member who contributes a laptop and six months of unpaid work are not in the same position, and the agreement should say so. This is also where you record whether members can add capital later, and what happens if someone does not pay a promised contribution.
3. Profit and loss distribution. By default, many states split profits according to ownership percentage. That is fine for a simple setup, but it is not always what owners want. A two-person LLC might split profits 50/50 even though one partner owns 60% of the company, because the other partner runs day-to-day operations. Put the exact split in writing, and note how and when distributions are paid — monthly, quarterly, or at year end.
4. Management structure: member-managed or manager-managed. A member-managed LLC is run directly by its owners. A manager-managed LLC hands day-to-day control to one or more managers, who may or may not be members. This choice matters: in a single-member LLC it barely comes up, but in a multi-member LLC it decides who can sign contracts, hire staff, and spend company money without asking the others first. Pick one, name the managers if any, and set limits — for example, any expense above $5,000 needs a member vote.
5. Voting rights and decision rules. Not every decision needs a vote, but the big ones do: taking on debt, selling the business, adding a member, or changing the agreement itself. State whether votes are weighted by ownership percentage or one vote per member, and what majority is needed. A 50/50 LLC needs special attention here — a tie means deadlock, so write in a tie-breaker, such as mediation or a buyout trigger, before you ever need one.
6. Adding and removing members. Businesses change. A partner may want out, a new investor may want in, or a member may stop pulling their weight. Your agreement should say whether a member can transfer their interest, whether the other members get the first right to buy it, and how the buyout price is worked out — book value, a multiple of earnings, or an independent appraisal. This buyout clause is the section owners are most grateful for when a partnership sours, because without it, a departing member can sell their share to a stranger.
7. Dissolution: how the business ends. The agreement should state what triggers a wind-down — a member vote, bankruptcy, or a set date — and the order of payouts: creditors first, then member capital contributions, then remaining profits by ownership share. Ending cleanly protects your personal assets and your credit, and it is far cheaper than letting a dead LLC linger with annual state fees and tax filings.
Single-member LLC: do you still need one?
Yes, and for a practical reason. A single-member LLC operating agreement proves to banks, courts, and the IRS that your business is separate from you personally. That separation — the liability shield — is the whole point of an LLC. If you treat the company and your personal wallet as one pot, a court can decide the LLC is not really separate at all, a doctrine lawyers call piercing the corporate veil. A signed agreement, a separate business bank account, and clean books are the three habits that keep that shield intact.
It also matters if you ever sell the business or bring in a partner. A buyer wants to see the paperwork, and a future partner wants to know the rules before they sign on.
How to write one (without overpaying)
You have three realistic options. A template from a reputable legal publisher works for a simple single-member or two-member LLC — fill it in carefully, delete the clauses that do not apply, and do not leave blanks. An online legal service costs more but walks you through the choices. A business attorney is the right call when there are multiple members, unequal contributions, outside investors, or real estate involved; expect a few hundred dollars for a straightforward draft, which is cheap insurance against a dispute that could cost thousands.
Whatever route you take, every member should read the final draft, sign it, and keep a copy with the company’s other records — next to the articles of organization, the EIN letter, and the annual state filings. Store a digital copy too, and revisit the agreement whenever ownership, profit splits, or the management structure changes. An agreement that no longer matches reality is almost as risky as having none.
Common mistakes to avoid
The most common mistake is copying a template and never reading it — a clause that gives a silent partner veto power over daily spending will cause a fight sooner or later. The second is leaving the buyout section vague, which turns every exit into a negotiation. The third is never signing it at all: an unsigned draft sitting in someone’s downloads folder proves nothing. Sign it, date it, and file it.
The bottom line
An LLC operating agreement is not busywork. It is the document that decides who owns what, who decides what, and what happens when things change. States give you default rules, banks ask for the paperwork, and partners remember verbal promises differently. A few pages, signed while everyone is still friends, protect the business you are building.
Disclaimer: This article is general information, not legal or tax advice. LLC rules vary by state. For a multi-member LLC, an operating agreement with outside investors, or a dispute, talk to a licensed attorney in your state.
Frequently asked questions
Is an LLC operating agreement required in every state?
No. Only a few states, including California, Delaware, Maine, Missouri, and New York, require one by law. Even where it is not required, banks, courts, and investors often ask for it, so most LLCs should have one.
Can I write my own LLC operating agreement?
Yes. A single-member or simple multi-member LLC can use a reputable template or an online legal service. Have an attorney review it if there are multiple members, unequal contributions, or outside investors.
Does an operating agreement need to be filed with the state?
In most states, no. It is an internal document kept with your business records. The document you file with the state is the articles of organization.
What happens if my LLC has no operating agreement?
Your state’s default LLC rules apply. Those defaults may split profits by ownership percentage, allow a member to transfer their interest freely, and offer no buyout process — which can cause disputes that a written agreement would have prevented.
Does a single-member LLC need an operating agreement?
Yes. It strengthens the separation between you and the business, which protects your liability shield, and banks often require it to open a business bank account.
