Your EIN: What It Is, Why You Need It, How to Get It Right

RamGrows Financial team · 6 min read

An EIN is nine digits, it is free, and getting one takes about fifteen minutes when everything goes right. And yet we regularly meet owners who paid $250 to a website for it, ended up with two of them by accident, or cannot open a bank account because the name on their paperwork does not match what the IRS has on file.

This guide covers what an EIN actually is, when you need one, and the handful of details that keep it from becoming a headache later.

What an EIN actually is

EIN stands for Employer Identification Number. It is a federal tax ID issued by the IRS: think of it as a Social Security number for your business. Despite the word "employer" in the name, you do not need employees to get one or to need one. It never expires, it is free, and once assigned to your business it stays with it.

The paper application is Form SS-4. Most people never touch the paper version because the IRS has an online application that asks the same questions, but it helps to know the form name, because banks and licensing agencies sometimes refer to it.

Why you need one, even without employees

In practice, an EIN is the key that unlocks almost everything else:

• A business bank account. Nearly every bank requires an EIN to open an account for an LLC or corporation. Keeping business money separate is not optional if you want your books, your taxes, and your legal protection to hold up.
• Hiring. The moment you put anyone on payroll, the EIN is mandatory.
• Licenses and registrations. Many New York applications, including sales tax registration, ask for it.
• Wholesale accounts. Suppliers and distributors usually want an EIN on file before they will sell to you at trade prices.
• Privacy. If clients send you a W-9, an EIN keeps your personal Social Security number off documents that get emailed around and stored who knows where.
• Credit and funding. Your business credit file is built around your EIN, and lenders will ask for it on every application. Your personal credit still matters too: see our credit repair guide and our overview of small business funding.

How to get it right the first time

Apply directly on irs.gov, using the IRS online EIN assistant. It is free. This matters because the first page of search results is often full of lookalike sites with official-sounding names that charge $100 to $300 for filling out the same free form. They are not the IRS. If a site asks for a credit card to issue an EIN, close the tab.

A few things to know before you start:

• Form your entity first. If you are creating an LLC or corporation, complete the state formation before applying, so the EIN matches the exact legal name New York approved. Our article on choosing between an LLC and an S-corp covers that decision.
• Pick a responsible party. The application asks for a real human being who controls the business, along with that person's Social Security number or ITIN. This cannot be another company.
• One per day. The IRS issues one EIN per responsible party per day. If the online tool throws an error, do not keep resubmitting: that is how people end up with duplicate numbers.
• The online tool keeps business hours. Oddly, the online assistant is only open during certain hours on weekdays, and it does not save progress. Sit down with your formation documents ready and finish in one sitting.
• Save the confirmation letter. The IRS issues a letter called a CP 575 when the EIN is assigned. Banks ask for it constantly, and the IRS will not reissue that exact letter. Save the PDF in three places.

No Social Security number? You can still get an EIN

This question comes up in our office every week, and the answer surprises people: you do not need a Social Security number to get an EIN. The online tool requires an SSN or ITIN, but the Form SS-4 itself has a path for owners who have neither. Those applicants file by fax or mail, or call the IRS international applicants phone line, following the form's instructions for foreign applicants.

It takes longer than the online route, sometimes several weeks by mail, so build that into your timeline if you are waiting on the EIN to open a bank account. But do not let anyone tell you that no SSN means no business. It simply is not true.

The mistakes we see constantly

• Paying a middleman. Covered above, but it is the number one issue by volume.
• Two EINs for one business. Usually from resubmitting after an error, or from applying "just in case" before forming the LLC and then again after. Duplicates confuse banks and the IRS. If it happens, it can be fixed with a letter, but it is far easier to avoid.
• Name mismatches. The bank rejects the account because the IRS letter says "BRIGHTON BAKERY LLC" and the state filing says "Brighton Bakery, LLC." Small punctuation differences usually resolve, but a genuinely different name will stop you cold. Match the state-approved name exactly when you apply.
• Losing the CP 575 and panicking. You cannot get that letter again, but you can call the IRS business line and request a verification letter known as a 147C, which banks accept. Expect hold time.
• Not updating the IRS. If your address or responsible party changes, the IRS wants to know, generally via Form 8822-B. Skipping this means IRS mail goes to an old address, and IRS mail is never something you want wandering.

When you need a new EIN, and when you do not

The general rule: a change in what the business is usually needs a new EIN, and a cosmetic change does not.

• New EIN usually needed: a sole proprietor incorporates, a partnership becomes a corporation, or the structure otherwise fundamentally changes.
• No new EIN needed: a business name change, a new address, adding a DBA, or an existing LLC or corporation electing S-corp taxation. The S election changes how you are taxed, not who you are, so the EIN stays.

When in doubt, ask before applying. An unnecessary second EIN creates more cleanup than the question would have cost you.

One more note: your EIN is also the number you will reach for on ownership and compliance filings, including the federal beneficial ownership report if it applies to you. We cover that in BOIR explained.

This article is general information, not personal tax or legal advice for your specific situation.

If you would rather have someone handle the whole setup, that is literally what we do. RamGrows Financial forms companies for $350 in New York, New Jersey, and Pennsylvania, EIN included in the process, and we handle bookkeeping and sales tax daily in seven languages. Call (201) 253-7771 or visit us at 509 Brighton Beach Ave, Suite 1, Brooklyn.