Registered agent, EIN, operating agreement: what each one actually does
Three terms every new owner meets in week one, explained without the jargon — and the mistakes each one causes.
New owners are handed a pile of terminology at formation. These three come up constantly, and confusing them causes real problems.
Registered agent The registered agent is the person or company designated to receive official notices for your entity: state correspondence and legal service of process. Most states require one with an address in the state of formation or registration.
What it is not: a mailing address for your business, a place to receive packages, or a way to keep a business address off public record entirely. Our registered agent service receives official state and legal notices only — it does not provide a physical or mailing address for your company, and you use your own U.S. address for business purposes.
Common mistake: naming yourself at an address you later leave, then missing a legal notice or a state filing reminder.
EIN The Employer Identification Number is the federal identification number for the business, issued by the IRS. Banks ask for it, payroll requires it, contractor forms and many business returns use it. Despite the name, you do not need employees to need one.
Common mistakes: applying with inconsistent entity information, or using a personal Social Security number for business banking and payments when the business should be using its EIN. If you are a non-U.S. resident, the application process has extra considerations, so it is worth handling it with someone who does it regularly.
Operating agreement The internal rulebook of an LLC. It records ownership percentages, how profits are shared, who can sign and decide, what happens when a member wants out, and how disputes are resolved. Corporations use bylaws and shareholder agreements for the same purpose.
Even single-member LLCs benefit: it documents the separation between you and the entity, and banks or partners sometimes ask for it.
Common mistake: a partnership operating on a handshake. Nothing tests a friendship faster than an unwritten split when the business becomes valuable, or when one partner stops working.
How they fit together The state creates the entity, the registered agent keeps you reachable, the EIN lets the business transact and file, and the operating agreement governs how the owners behave. Missing one of the four is where most first-year trouble starts.
Requirements vary by state and situation. Every one of our formation packages includes the state registration, EIN and registered agent service, with the documents explained in plain language, in English or Portuguese. Contact us to get started.
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