Every US LLC needs a registered agent and, for most business uses, an EIN. They are two of the first terms that confuse freelancers outside the United States, but they are straightforward once you know what each one does and what a foreign owner needs.
The short answer: a registered agent is a person or company with a physical address in the LLC’s state that receives legal and official mail for the LLC. An EIN (Employer Identification Number) is the tax number the IRS assigns to the LLC. Foreign owners without a US Social Security number can still get an EIN, but the application has extra steps, so many use a service to help.
Rules and procedures of states and the IRS change. This guide is general information, not legal or tax advice. Check the current instructions on the official IRS and state websites.
Key takeaways: registered agent
- A registered agent receives legal and official documents for the LLC in its state of formation.
- An EIN is the IRS tax number that the LLC needs for banking, payment processors and tax filings.
- Foreign owners without an SSN can apply for an EIN, but the online system is usually not available to them.
- You must keep a registered agent for as long as the LLC exists.
- Keep both documents and credentials safe and updated.
In this guide
- Key takeaways: registered agent
- What is a registered agent?
- Why a registered agent matters for foreign owners
- How to choose a registered agent
- What is an EIN?
- How a foreign owner gets an EIN
- Registered agent vs EIN: the main differences
- What you need next
- Common mistakes with a registered agent and EIN
- Frequently asked questions about registered agent
- Final thoughts on registered agent
- Sources and further reading
- Related guides
What is a registered agent?
A registered agent, sometimes called a statutory agent, is a person or company designated to receive service of process (lawsuit papers) and official state correspondence on behalf of the LLC. The agent must have a physical address in the state where the LLC is formed and be available during business hours. The agent’s address appears on public filings, which is one reason many owners use a professional service instead of their own address.
Why a registered agent matters for foreign owners
- You do not have a US address, and the state requires one.
- Important legal and tax notices reach the agent first.
- If the agent lapses or you miss notices, the LLC may lose good standing.
- A professional agent protects the privacy of your home address.
Check the agent’s terms: yearly fee, renewal, what is forwarded and how fast. Providers are compared in LLC formation services: how to choose a provider.
How to choose a registered agent
- Confirm the agent is authorised in the state of your LLC.
- Compare annual fees, and check whether the price is for the first year only.
- Ask how documents are scanned and forwarded to you.
- Check that you can change agents without losing your LLC.
- Read independent reviews about reliability.
What is an EIN?
An EIN is a nine-digit number issued by the IRS to identify a business for tax purposes. A US LLC generally needs one to open a business bank account, work with payment processors, file US tax forms and hire employees. It is free to obtain directly from the IRS, although services may charge for helping you.
How a foreign owner gets an EIN
The IRS online application normally requires a US taxpayer identification number such as an SSN or ITIN for the responsible party. A foreign owner without one usually has to apply with Form SS-4, by mail, fax or phone, depending on the IRS procedures in force, and enter «foreign» or the equivalent instruction where the form asks for the SSN or ITIN. Processing times vary and can be longer than the online process.
- Form the LLC and obtain the formation documents.
- Complete Form SS-4 with the LLC’s details and the responsible party’s details.
- Submit it using the method the IRS currently accepts for foreign applicants.
- Save the confirmation letter (CP 575 or the substitute notice) that contains the EIN.
Many formation services handle this step for a fee. Check the official IRS instructions for the latest process.
Registered agent vs EIN: the main differences
| Feature | Registered agent | EIN |
|---|---|---|
| Issued by | Appointed by you; authorised by the state | Issued by the IRS |
| Purpose | Receives legal and official mail | Identifies the LLC for tax and banking |
| Recurring cost | Yearly service fee | No recurring fee |
| Consequence if missing | The LLC can lose good standing | Banking and tax filings are blocked |
What you need next
With an agent and an EIN, you can open a bank or fintech account and start receiving payments. See LLC bank account without living in the US and, if you invoice US clients, how to receive ACH payments from US clients. Remember that the LLC does not remove your Spanish tax duties: read LLC taxation in Spain.
Common mistakes with a registered agent and EIN
- Letting the registered agent subscription lapse.
- Using a friend’s address without a reliable way to receive documents.
- Paying for an EIN that the IRS issues for free, without checking what the service adds.
- Not keeping the EIN confirmation letter.
- Entering the wrong responsible party details on the SS-4.
- Ignoring notices forwarded by the agent.
Frequently asked questions about registered agent
What is a registered agent?
A person or company with an address in the LLC’s state that receives legal and official documents for the LLC.
Do I need a registered agent for an LLC?
Yes. Every LLC must have one in its state of formation.
What is an EIN?
A nine-digit tax number issued by the IRS to identify a business for tax and banking purposes.
Can I get an EIN without an SSN?
Yes. Foreign owners can apply, usually with Form SS-4 by mail, fax or phone. Check the current IRS instructions.
Does an EIN cost money?
The IRS issues it for free. Services may charge for their help.
Can I act as my own registered agent?
Only if you have a physical address in the state and are available during business hours, which rarely applies to foreign owners.
Final thoughts on registered agent
A registered agent and an EIN are the two basic building blocks of a US LLC: the first receives your legal mail and the second identifies your company to the IRS and to banks. Choose a reliable agent, keep it active, apply for the EIN through the process that fits a foreign owner and save every confirmation. Then move on to banking, payments and, importantly, your Spanish tax obligations.
Sources and further reading
- IRS: Employer Identification Number
- IRS: About Form SS-4
- Wyoming Secretary of State
- Delaware Division of Corporations
Related guides
- LLC for Freelancers in Spain: Pros, Cons and Costs
- LLC Formation Services: How to Choose a Provider from Spain
- LLC Bank Account Without Living in the US: Options for Freelancers
- Wyoming vs Delaware vs New Mexico LLC: Key Differences for Freelancers
Disclaimer: This article is for general information only and is not tax, legal or financial advice. Rules, fees and thresholds change often and differ by country; always confirm current details with the tax authority and a qualified adviser. Some links may be affiliate links, which means we may earn a commission at no extra cost to you.