An operating agreement is the internal contract setting out how an LLC is owned and run - members, ownership percentages, how decisions are made, how profits are distributed and what happens if an owner leaves. Most states do not require you to file it, and some do not require one at all.
Why does Operating agreement matter for founders?
Banks and payment processors frequently ask for it, particularly where formation documents do not name the owner - which is the case in anonymous states. Even a single-member LLC should have one, because it evidences who controls the company.
Where can I read more about Operating agreement?
Note: A plain-English definition for orientation, not legal or tax advice. Rules change - last checked 2026-07-21.