A New Mexico LLC operating agreement is the written contract among members that sets ownership shares, decides who runs the company, and controls what happens when someone joins, leaves, or wants to shut things down. New Mexico doesn’t require you to have one, but if you don’t — or if yours is silent on an issue — the default rules in the Limited Liability Company Act, NMSA 1978 Chapter 53, Article 19, take over.1Justia. New Mexico Code 53-19-1 – Short Title Those defaults rarely match what owners actually want, so the agreement is your chance to write the rules of your own company before a disagreement forces you to live with someone else’s.
One threshold point: the statute defines an operating agreement as a written agreement covering the conduct of the company’s business and affairs.2Justia. New Mexico Code 53-19-2 – Definitions Handshake deals and email threads don’t count. And you never file the agreement with the state — it’s an internal document, and storing it safely is your job.
Choose Member-Managed or Manager-Managed
The default under New Mexico law is member-managed: every owner participates in running the business and can bind the company to contracts.3Justia. New Mexico Code 53-19-15 – Management by Members or Managers That fits small LLCs where everyone works in the business. If you want a manager-managed structure instead, the articles of organization must say so, and the operating agreement should describe how managers are chosen, what they can decide on their own, and how they can be removed.
Under the statute’s default rules, a manager is appointed or removed by a majority of the members’ voting power, and a manager doesn’t have to be a member or even a person — an entity can serve.3Justia. New Mexico Code 53-19-15 – Management by Members or Managers In a manager-managed LLC, the managers hold every decision-making power the LLC Act doesn’t reserve to members.
Many multi-member LLCs land somewhere in the middle: one or two managing members handle daily operations, but major decisions — taking on debt, selling company assets, signing long-term leases — require a full membership vote. Whatever balance you want, put the boundaries in writing.
Document Capital Contributions
New Mexico allows membership interests to be issued for cash, property, or services already rendered to the company.4New Mexico Secretary of State. New Mexico Code 53-19-20 – Contributions to Capital Whoever manages the LLC determines and records the value of each contribution as of the date it was made. If the articles of organization or operating agreement permit it, a member can also receive an interest in exchange for a promissory note or a written promise to contribute in the future.
Your agreement should list each initial contribution, its agreed value, and whether additional contributions can ever be required — and if so, under what conditions and with what consequences for a member who refuses. These numbers drive everything that comes next.
Set Profit-Sharing and Distribution Rules
Here’s where the default rule surprises people. Under the LLC Act, profits and losses are split in proportion to each member’s capital contribution, and cash distributions follow the same ratio.5New Mexico Secretary of State. New Mexico Code 53-19-22 – Sharing of Profits and Losses If one member put in 90% of the startup capital and another put in 10%, the split is 90/10 on everything — even if the smaller contributor is doing all the work.
If you want equal splits, sweat-equity credit, or a tiered allocation that shifts as capital is repaid, the operating agreement has to say so. It should also set the timing and frequency of distributions — quarterly, annual, or on some other schedule — and include a provision letting management hold back cash for business needs. Without a retention clause, members can end up with wildly different expectations about when checks go out.
Voting Thresholds and Bringing In New Members
The default voting rule is a majority of the total voting power for most decisions, including amending the operating agreement, approving mergers, and selling substantially all of the company’s assets.6New Mexico Secretary of State. New Mexico Code 53-19-17 – Voting There’s a useful built-in protection: if any provision of your agreement requires a supermajority, that same supermajority is needed to change it. A slim majority can’t quietly lower the bar on itself.
Admitting new members is where the defaults get restrictive. If neither the articles nor the operating agreement addresses it, bringing in a new member takes the written consent of every existing member. In a company with even minor disagreements, that unanimous requirement can create deadlocks. The agreement can loosen it to a simple or supermajority vote, or tighten it further by giving specific members veto rights.
Cover the exit side too. What happens to a departing member’s interest? Does the LLC or the remaining members have a right to buy it? How is it valued, and over what period is the buyout paid? Silence on these points is what turns amicable departures into lawsuits.
Fiduciary Duties You Can and Can’t Modify
Any member with management responsibilities, and every manager, owes two fiduciary duties under New Mexico law.
The duty of care is forgiving. A managing member or manager isn’t personally liable for a bad business decision unless it rises to gross negligence or willful misconduct.7Justia. New Mexico Code 53-19-16 – Liabilities and Duties of Managers and Members Your operating agreement can’t eliminate this floor, but it can spell out what informed decision-making looks like for your particular business.
The duty of loyalty is stricter. A managing member or manager must account to the company for any profit or benefit gained from company transactions or company property, including confidential information.7Justia. New Mexico Code 53-19-16 – Liabilities and Duties of Managers and Members Two statutory safe harbors apply: the self-dealing transaction was disclosed to and approved by a majority of disinterested managers or all disinterested members, or the transaction was fair to the company at the time it was approved. A well-drafted agreement builds a clear disclosure-and-approval procedure of its own rather than leaving members to argue about fairness after a deal has already blown up.
Dissolution and Winding Up
Your agreement should spell out what ends the company. Under the LLC Act, dissolution happens in one of three ways: an event listed in the articles or operating agreement occurs, members holding a majority of the voting power consent in writing, or a court orders dissolution because the business can no longer operate in line with its governing documents.8New Mexico Secretary of State. New Mexico Code 53-19-39 – Dissolution Written triggers commonly include the death or permanent disability of a key member, the company falling below a minimum capital threshold, or a fixed expiration date.
Dissolution doesn’t end the LLC immediately. The company continues in existence long enough to pay creditors, collect what’s owed to it, and distribute whatever’s left. The standard priority for those distributions is:
- Outside creditors first — all debts and obligations to third parties.
- Members acting as creditors — any unpaid distributions already owed to them.
- Return of capital — each member gets back the value of their contributions.
- Any remaining surplus, split according to the operating agreement’s distribution rules.
After winding up, the people authorized to run the process file articles of dissolution with the New Mexico Secretary of State, listing the company’s name, the event that caused dissolution, and the name and address of each person authorized to act during wind-up.9Justia. New Mexico Code 53-19-41 – Articles of Dissolution Once those articles are filed, only the individuals named in them can transact business for the company.
A dissolved LLC can still face claims for up to three years after publishing notice of dissolution, and individual members can be personally liable up to the fair market value of what they received during wind-up.10Justia. New Mexico Code 53-19-46 – Unknown Claims Against Dissolved Limited Liability Company Assign responsibility for the wind-up in the agreement, and think about how to hold back a reserve for post-dissolution claims.
How the Agreement Handles Tax Elections
The operating agreement shapes federal tax treatment as much as it shapes internal governance. A single-member LLC is a disregarded entity by default, with income flowing to the owner’s Schedule C. A multi-member LLC is treated as a partnership by default, filing Form 1065 and issuing a K-1 to each member. Both are pass-through structures, so the LLC itself owes no federal income tax.
Some LLCs with substantial profits elect S-corporation tax treatment to reduce self-employment tax by splitting income between salary and distributions. To make the election, file IRS Form 2553 no later than two months and 15 days after the beginning of the tax year the election is meant to take effect, or anytime during the preceding tax year.11Internal Revenue Service. Instructions for Form 2553 For a calendar-year LLC wanting S-corp treatment starting January 1, 2026, that deadline is March 15, 2026. Because changing tax classification affects every member’s personal return, the agreement should say how tax elections get decided.
Multi-member LLCs, any LLC with employees, and any LLC electing corporate tax treatment need an Employer Identification Number from the IRS. Even a single-member LLC without employees is usually better off with an EIN, since banks generally require one to open a business account.
Amendments
Businesses change, and the agreement needs a clean way to change with them. The default is a majority of the voting power to amend, with the built-in ratchet that any supermajority provision can only be changed by the same supermajority.6New Mexico Secretary of State. New Mexico Code 53-19-17 – Voting Amendments aren’t filed with any state agency. A workable amendment identifies the LLC, states the exact section being changed and the new language, confirms all other provisions remain in effect, and is signed by the members who approved it. Keep every amendment stored with the original so the current rulebook is always complete.
Signing and Storing the Agreement
Every member should sign. Notarization isn’t required in New Mexico, but signatures on a single document shut down later arguments about who agreed to what. A member who joins after the original signing should sign a joinder or acknowledgment agreeing to be bound by the existing terms.
Because the agreement is never filed with the state, safekeeping is entirely on you. Store the signed original somewhere secure — a fireproof safe, a locked cabinet at the principal office, encrypted digital storage — and give every member their own copy. When a dispute starts, the first question is what the agreement says, and the second is whether you can produce it. If you can’t produce it, you’re back to arguing over what the default rules require, which is exactly the situation the agreement existed to prevent.
One New Mexico advantage worth knowing: LLCs are not required to file annual or biennial reports with the Secretary of State, so ongoing compliance is lighter than in many other states. The operating agreement, kept current and signed, does most of the governance work.