Independent guide. Not affiliated with any formation service, IRS, or SBA. Not legal or tax advice. Last reviewed April 2026.
Updated 17 April 2026

LLC Operating Agreement:
Why Single-Member LLCs Need One Too

An operating agreement is not just boilerplate. For a single-member LLC, it is the strongest piece of evidence that your LLC is a genuinely separate entity -- which courts look for before piercing the veil.

What Is an Operating Agreement?

An operating agreement is the LLC's internal rulebook. It documents who owns the LLC, how decisions are made, how profits are distributed, and what happens if a member wants to leave or dies. It is a private document -- you do not file it with the state in most cases.

Who it governs

Defines member ownership percentages, roles, and responsibilities. Even for a single-member LLC, it establishes who owns what and what decisions require formal approval.

How it protects

Establishes the LLC as a separate legal entity from its owner. Courts look for the operating agreement when deciding whether the LLC veil should be respected or pierced.

What it covers

Profit distribution, management structure, voting rights, transfer of membership interests, buyout terms, and dissolution procedures.

Is It Required?

Only 5 states require an operating agreement by law. Every other state leaves it optional. But "optional" does not mean "unnecessary."

California (required)Delaware (required)Maine (required)Missouri (required)New York (required)

For a single-member LLC, the operating agreement is the single most important document you can have for maintaining veil protection. Courts in piercing-the-veil cases consistently cite the absence of an operating agreement as evidence of alter ego treatment.

Core Sections of an Operating Agreement

Basic identifying information

LLC name, principal business address, state of formation, registered agent name, and stated business purpose.

Members and ownership

Legal names and addresses of all members, ownership percentage of each member, and initial capital contributions (what each member put in to start).

Management structure

Whether the LLC is member-managed (owner runs it directly) or manager-managed (a designated manager handles operations). Single-member LLCs are almost always member-managed.

Profit and loss allocation

How profits and losses are divided among members. Usually proportional to ownership percentage, but can be customised. Required for clarity and tax purposes.

Voting rights

What decisions require a vote, what percentage constitutes approval. For single-member LLCs, this is simple: the sole member makes all decisions.

Transfer restrictions

Rules about when and how membership interests can be transferred, sold, or gifted. Protects the LLC from unwanted new members.

Dissolution terms

What happens if the LLC is wound down, including how assets are distributed and how remaining obligations are handled.

Where to Get an Operating Agreement

Free Templates

Adequate for most single-member LLCs doing standard business.

  • SBA.gov templates
  • Some state SOS sites
  • Nolo.com
  • LegalTemplates.net

Formation Services

Usually included or a small add-on. Convenient but often generic.

  • Northwest Registered Agent (included)
  • ZenBusiness (included)
  • Bizee (included)
  • LegalZoom (included)

Attorney-Drafted

$200-$500 for single-member. $500-$2,000 for complex multi-member.

Recommended for: unequal ownership, complex buyout terms, significant assets, anticipated investor involvement.

Operating Agreement FAQ

Is an operating agreement required?
Only in 5 states by law: California, Delaware, Maine, Missouri, and New York. But every LLC should have one for veil protection purposes.
Does a single-member LLC need one?
Yes. It is the strongest evidence that the LLC operates as a separate legal entity. Without one, courts are more likely to treat the LLC as your alter ego and pierce the veil.
What must it contain?
Identifying information, member names and ownership percentages, capital contributions, management structure, profit allocation, voting rights, transfer restrictions, and dissolution terms.
Where do I get one?
Free templates on SBA.gov or Nolo. Most formation services include one. Hire an attorney for multi-member LLCs with complex arrangements.