Federal EIN Letter Storage in 2026: Where LLC Owners Keep Proof Banks Still Ask For

August 28, 2026

The federal EIN letter is the document you got from the IRS when you formed your LLC. You shoved it in a drawer. Two years later, a banker asks for a copy and the drawer is empty. That is the moment small business owners realize the federal EIN letter is one of those documents that does not matter until it matters urgently. The good news? Fixing it is simple. Keeping it safe is even simpler once you have a system.

This article covers what the EIN letter is, why banks keep asking for it, where to store it so it never goes missing again, how to get a replacement if the original is gone, and how long the IRS says you actually need to keep it. By the end you will have a written plan that takes the guesswork out of one of the most borrowed documents in small business banking.

Federal EIN letter storage system for LLCs

What the Federal EIN Letter Actually Is

The federal EIN letter is the document the IRS sends when your LLC receives its Employer Identification Number. It is officially called Notice CP575. The IRS issues it when you first apply for an EIN online, by fax, or by mail. It shows your nine-digit number, your business name exactly as it appeared on the application, the date the number was assigned, the IRS campus that processed it, and the responsible party name on record.

That letter is not just a copy of your number. It is a verified record that the IRS issued that EIN to that specific business entity on that specific date. Banks use it to confirm your LLC is a real entity that the federal government already knows about. A banker will often ask for it even when you already have your articles of organization, because two documents are more convincing than one when a compliance officer is reviewing a new account application.

The EIN itself never expires and does not need to be renewed. The letter is just the proof you received it. If you lose the letter, the number is still active and assigned to your business. You do not lose the EIN. You only lose the piece of paper that proves it was issued to you. Getting a replacement is free and takes anywhere from ten minutes to six weeks depending on which path you choose.

The EIN also stays with the entity even if the business changes address, adds members, or restructures. The IRS matches the number to the entity, not to a location or ownership configuration. Only dissolution ends an EIN. If you dissolve the LLC and form a new one, you need a new EIN even if the business name is the same. The SBA business registration guide covers the EIN in the context of all federal registration steps for new businesses.

Why Banks Still Ask for the EIN Letter in 2026

Banks are required to verify the identity of everyone who opens a business account under the Bank Secrecy Act and the USA PATRIOT Act. That means they need documentation that proves the business exists, that the person applying has authority to act on its behalf, and that the business is not a shell company being used for fraud. The federal EIN letter covers part of that verification. So does the operating agreement, the articles of organization, and a government-issued photo ID from each member on the account.

Banks do not care which specific documents you bring as long as they have enough to satisfy their compliance team. The EIN letter is one of the cleanest because it comes from the IRS, a source a banker already trusts. Some banks accept an EIN confirmation printout from the IRS website. Others insist on the physical CP575 notice. A few online banks accept the EIN number alone with no supporting documentation. Most community banks and credit unions want the full letter.

Calling ahead before you visit the branch is the single most time-saving step in the whole process. Ask what documents they require specifically and whether they accept a printout from the IRS online EIN lookup tool. Ask whether the person opening the account needs to be physically present or whether an authorized signer can bring documents on behalf of the LLC. A five-minute phone call prevents a wasted trip and a second visit.

The IRS EIN online assistant is the fastest way to retrieve your number if you have forgotten it. You will need the business name, principal officer’s SSN, and the state where the LLC was formed. This tool will display the EIN on screen but it will not reprint the CP575 letter. Bring a screenshot or printout of the confirmation page. If the bank will not accept it, you know you need the full replacement.

Where to Store Your EIN Letter Right Now

Three storage methods work. Pick the one that fits how your business actually runs.

Cloud storage. Upload a scan or photo of the letter to Google Drive, Dropbox, or iCloud. Put it in a shared business folder if multiple members need access. Rename the file clearly: “EIN_Letter_[BusinessName]_[FormationYear].pdf”. Searchable file names save time when you are hunting for it at 9 a.m. on a Monday before a bank meeting. Set a reminder to verify the file is still there every six months.

Physical binder. A three-ring binder with your formation documents works for owners who prefer paper. Keep the EIN letter behind the operating agreement and articles of organization. Add a tab divider labeled “Federal Tax IDs.” This binder is also where you keep the EIN letter for every new owner handoff. When the business changes hands, the EIN letter goes in that binder and travels with the rest of the entity records to the new owner.

Registered agent document vault. Many registered agent services offer document storage as an add-on. Ask whether yours does. Storing the EIN letter with your registered agent keeps a copy outside your office in case of fire, theft, or a natural disaster. It also means the copy is managed by a company whose job is to receive official mail and keep it organized.

The goal is to have a copy that survives a lost phone, a flooded basement, or a move across town. One copy is a risk. Two copies in two different formats and locations is a system. Redundancy is not paranoia. It is how business owners sleep at night.

How to Get a Replacement EIN Letter From the IRS

If the original letter is gone, you have three ways to get a replacement. Speed and availability determine which one makes sense for your situation.

IRS online lookup. Go to the IRS EIN assistant and follow the prompts. You will need the business name, principal officer’s SSN or ITIN, and the state of formation. This only works if you originally applied online or by phone. It will display the EIN on screen but it will not reprint the CP575 notice. Some banks accept the confirmation page from this tool as sufficient. Call your bank first.

Fax request to the IRS. Send IRS Form 4506-T, Request for Transcript of Tax Return, to the IRS by fax. Check the box for “EIN Verification” or “CP575 Notice.” The IRS typically responds within five business days. The fax number and exact instructions are on the form itself at the IRS forms page. This is the fastest path to an actual CP575 reprint.

Mail request. Send a signed letter to the IRS campus that handles EIN matters for your region. Include the LLC name, formation date, state of formation, and a contact name and phone number. The response takes four to six weeks by mail. This is the slowest option but it works when you cannot use the online or fax tools and you are not in a hurry. The IRS taxpayer privacy practices page explains how the IRS handles your information when you request a replacement letter.

For most LLC owners, the fax route is the best balance of speed and reliability. Five business days beats six weeks. The replacement CP575 looks slightly different from the original — it may be computer-generated rather than pre-printed — but it carries the same legal weight and the same information.

How Long to Keep the EIN Letter

Keep the letter for as long as the LLC exists. The EIN belongs to the business entity, not to the current owner. If you dissolve the LLC and form a new one later, the old EIN does not transfer. The IRS closes the account when the entity is dissolved. You need a new number for the new entity.

If the LLC is sold or transferred, the EIN letter goes to the new owner as part of the entity records handoff. The new owner keeps it for the life of the business they acquired. This is one of the documents that should be in every new owner records package. The operating agreement, articles of organization, and EIN letter together form the core identity package that every LLC buyer expects to receive at closing.

For tax purposes, the IRS recommends keeping business records for at least three years from the date the tax return was filed or two years from the date the tax was paid, whichever is later. Keep the EIN letter longer than that minimum. It does not take up meaningful space and it proves who the business was and when it was formed. If the IRS ever questions whether an old EIN was properly retired, the letter is your proof.

The EIN letter also matters if you ever need to prove the history of a business entity. Lenders, investors, and courts sometimes ask for it. Having it ready saves time in situations where you cannot afford delays.

What to Do If a Bank Rejects Your EIN Document

Not all banks have the same requirements. A rejection at one branch does not mean a rejection at another institution. Small regional banks and credit unions often have simpler compliance processes and more flexibility with document requirements. Online banks like Mercury, Relay, or Bluevine sometimes accept the IRS online confirmation letter with no additional documents.

If a specific bank insists on the CP575 and you do not have it, get the replacement first. Use the fax method and give it five business days. Then go back with the CP575 in hand.

Keep a backup copy in two places at all times. If you store it only on your phone and the bank requires a printed copy, you need a second option. Email a copy to yourself, keep a copy in the cloud, and print a spare to keep with the physical business records. That way you are ready for whatever the banker asks for.

The bank is not trying to make your life difficult. They are trying to stay compliant with federal law. Bring more documents than you think you need. Bring the operating agreement, the articles of organization, the EIN letter, and a government-issued photo ID for each member who will be on the account. If they do not need all of it, great. If they do, you are ready.

The Difference Between the EIN and Other Business Numbers

Owners sometimes confuse the EIN with the state business registration number or the DUNS number. These are three separate identifiers that serve different purposes.

The EIN is issued by the IRS and used for federal tax filing, payroll taxes, and bank account opening. The state registration number is issued by the Secretary of State when you file your articles of organization and is used for state filings. The DUNS number is issued by Dun and Bradstreet and is used primarily when you want to work with federal government contractors or establish business credit. Your LLC needs all three eventually but they are not interchangeable.

The EIN is the number you will use most often. It goes on federal tax returns, payroll forms, bank applications, and loan paperwork. Keeping it accessible and documented matters more than the others because it comes up more often.

EIN Letter FAQs for LLC Owners

Frequently Asked Questions

Is the EIN letter the same as a tax return?

No. The EIN letter (CP575) is the IRS document that confirms your Employer Identification Number was issued to your business. A tax return is the form you file each year reporting income, expenses, and taxes owed. They are completely different documents.

What is the official name of the EIN letter?

It is officially called IRS Notice CP575. Banks may call it an EIN letter, an EIN confirmation letter, a CP575 notice, or a tax ID letter. They all mean the same document.

Can I use the EIN number alone to open a bank account?

Sometimes. Some banks accept the EIN number plus the articles of organization. Most banks still want the CP575 letter. Call ahead to confirm what your specific bank requires before you visit.

Does a replacement EIN letter look different from the original?

Yes. A replacement CP575 may be a computer-generated notice rather than the original pre-printed form. It carries the same information and the same legal weight.

Can I email a copy of the EIN letter to a bank?

Most banks require an original or a certified copy for account opening. Some accept a clear PDF sent from the LLC member’s verified email address. Ask the bank before assuming a digital copy is sufficient.

Who do I call if I cannot remember my EIN?

Call the IRS business line at 1-800-829-4933. Have the LLC name, formation date, and the responsible party SSN or ITIN ready. They will verify identity and provide the EIN over the phone.

Should I laminate the EIN letter?

No. Laminating older documents can cause the ink to bleed or the paper to warp. Keep it in a clear plastic sleeve in a binder instead. That protects it without risking damage to the paper.

What happens to the EIN if I dissolve the LLC?

The IRS closes the EIN account when the entity is formally dissolved. If you form a new LLC later, even with the same name, you need a new EIN.

The federal EIN letter is one of those documents you do not think about until the banker asks for it — which is exactly when you need to have it ready. Store it in two places, keep a printed copy in your physical binder, and get a replacement before you need a bank account, a merchant account, or a business loan. A ten-minute filing system today saves a six-week IRS wait later. Keep your federal EIN letter safe and you will never scramble for it at a bank meeting.