Getting an EIN for Your Maryland LLC

An Employer Identification Number is a nine-digit number the IRS assigns to identify your business for federal tax purposes. It is sometimes called a Federal Tax Identification Number, and it functions like a Social Security number for your LLC — the identifier you put on tax filings, bank applications, and payroll paperwork.

Federal, not state

This is the first thing to get straight: the EIN comes from the IRS, a federal agency, not from the state of Maryland or SDAT. Forming your LLC with SDAT and getting an EIN from the IRS are two separate steps with two separate agencies. Your Maryland formation does not automatically produce an EIN, and getting an EIN does not form or register anything with Maryland. Do the SDAT formation first, then get the EIN, because the IRS application asks about your LLC and it is cleaner to apply once the entity legally exists.

It is free

The IRS issues EINs at no cost. If you see a site charging a fee purely to "get your EIN," understand that the number itself is free directly from the IRS. A legitimate filing service may include EIN acquisition as part of a broader package for convenience, but the government charges nothing for the number.

Not every single-member LLC is strictly required to have an EIN for federal tax purposes, but in practice almost every LLC ends up needing one. Here is how to tell.

You definitely need an EIN if

• Your LLC has more than one member. A multi-member LLC is taxed as a partnership by default and must file a partnership return, which requires an EIN.
• You plan to hire employees. Any LLC with employees needs an EIN for payroll tax reporting and withholding.
• You elect corporate tax treatment. If you elect to have your LLC taxed as an S-corp or C-corp, you need an EIN.

You almost certainly want one if

• You are opening a business bank account. Nearly every bank requires an EIN to open an account in the LLC's name.
• You are a single-member LLC. Technically you can use your own Social Security number for federal taxes as a disregarded entity, but getting an EIN keeps your SSN off business paperwork and simplifies banking and vendor relationships.

For the overwhelming majority of Maryland LLCs, getting an EIN is the right move even when it is not strictly mandatory. The privacy and practicality benefits are worth the ten minutes it takes.

Applying is quick and, for most people, instant. The IRS offers several methods, but one is far faster than the rest.

Apply online (the fast way)

The IRS EIN Assistant on IRS.gov is the fastest method. The application takes about ten minutes, and the EIN is issued immediately at the end — you can print the confirmation letter and start using the number the same day. The online tool is available during the IRS's posted hours, and you must complete the session in one sitting; it does not save partway through.

To apply online, you need a valid US Social Security number or ITIN for the responsible party — the individual who controls the LLC. You will also provide the LLC's legal name exactly as filed with SDAT, its Maryland address, and basic details about the business.

Apply by fax or mail

If you do not have an SSN or ITIN, you cannot use the online tool. Instead, complete IRS Form SS-4 and submit it by fax or mail. Fax responses typically come back within a few business days; mail takes considerably longer. This is the standard path for non-US residents forming a Maryland LLC.

What "responsible party" means

The IRS requires you to name a responsible party — a real person who ultimately owns or controls the LLC. This cannot be another entity in most cases; it has to be an individual with a taxpayer ID. Choose the person who genuinely controls the company, since the IRS ties the EIN record to that individual.

Getting an EIN is simple, but a few avoidable errors cause real headaches. Watch for these.

Applying before your LLC exists

Apply for the EIN after SDAT has accepted your Articles of Organization, not before. If you get an EIN for an LLC that does not yet legally exist — or that gets rejected for a name conflict — you can end up with a mismatch between your IRS record and your state record that is annoying to untangle.

Getting the legal name wrong

Enter your LLC's legal name on the EIN application exactly as it appears in the SDAT record, including the designator like "LLC." A mismatch between your EIN and your formation record can cause friction with banks and the IRS later.

Applying for a second EIN unnecessarily

An LLC needs only one EIN for its life. If you already have one, do not apply again because you changed your address, added a member in some circumstances, or switched banks. There are narrow situations that require a new EIN — such as certain changes in entity structure — but routine changes do not. When in doubt, check the IRS guidance before applying for another number.

Paying for something that is free

The number itself is free from the IRS. You never have to pay the government for an EIN. Only pay a service if you are choosing to have them handle the application as a convenience, and know that the value is the service, not the number.

Once the IRS issues your EIN, a few things follow naturally, and it is worth keeping the confirmation somewhere safe.

Put it to work

With your EIN in hand, you can open a business bank account in the LLC's name, set up payroll if you are hiring, apply for business credit, and file your federal returns. Many vendors and clients will also ask for it on tax forms like the W-9. It is one of the core pieces of infrastructure that makes your LLC operational rather than just registered.

Keep the confirmation

Save the IRS confirmation letter (the CP 575 you receive when you apply, or a later 147C letter if you request confirmation again). Banks and lenders sometimes ask to see it. Storing it with your Articles of Organization and operating agreement keeps your core LLC documents together.

Remember it is only the federal piece

The EIN handles federal identification. Depending on your activities, you may also need to register with the Comptroller of Maryland — for example, to collect sales and use tax or to handle employer withholding. Those are separate Maryland registrations, distinct from your federal EIN, and they use the EIN as an identifier but are not the same thing.