CP-575: Your EIN Confirmation Letter Explained (2026)

The CP 575 is the notice the IRS issues once, when it assigns your business an Employer Identification Number (EIN), and it shows the nine-digit EIN, the business name and address exactly as the IRS recorded them, and on most versions the federal returns you must file. The IRS cannot duplicate the original notice. If yours is lost, eligible Business Tax Account users can download a digital CP575 (added in July 2026), and anyone authorized for the business can call 800-829-4933 for Letter 147C.

Key takeaways:

• Official name: CP 575, Notice of New Employer Identification Number Assigned, printed in ten versions from CP 575A to CP 575J; a sole proprietor or single-member LLC with no employment or excise filings usually gets the CP 575G
• Delivery: online applicants download it at the end of the session (choose online delivery and no paper copy follows); fax applicants get the EIN on a faxed cover sheet in about 4 business days; mail applicants receive the notice in about 4 weeks
• Issued once: the notice itself says it "is issued only one time and the IRS will not be able to generate a duplicate copy for you"
• Replacements: a digital CP575 under Tax Records in Business Tax Account, or Letter 147C from the Business & Specialty Tax Line, 800-829-4933, Monday to Friday, 7 a.m. to 7 p.m. local time
• Other names: EIN confirmation letter, EIN assignment notice, and "SS-4 confirmation letter," because the notice prints "Form: SS-4" under your EIN

What Is a CP 575?

The CP 575 is the computer-generated notice the IRS sends to confirm that it assigned an Employer Identification Number (EIN) to your business. An EIN is the nine-digit federal tax ID for a business, formatted XX-XXXXXXX. When the IRS approves an EIN application, whether you applied online or filed Form SS-4 by fax or mail, its system generates a CP 575 that confirms the number and the entity it belongs to.

"CP" stands for computer paragraph, the IRS label for its computer-generated notices, and 575 is the notice number for new EIN assignments; you will also see it written CP575 or CP-575. The notice's own heading reads "WE ASSIGNED YOU AN EMPLOYER IDENTIFICATION NUMBER." Banks, payment platforms, and payroll providers call the same document the EIN confirmation letter, the EIN assignment notice, or the SS-4 confirmation letter. For a walkthrough of the application behind it, see our Form SS-4 EIN application guide.

Is the CP 575 a Form?

No. The CP 575 is a notice the IRS sends you, not a form you download, fill out, or file, even though many people search for "Form CP 575." The form behind it is Form SS-4, Application for Employer Identification Number, which is why the notice lists "Form: SS-4" under your EIN. Nothing goes back to the IRS unless the name or address is wrong, in which case the notice asks you to mark the correction on the tear-off stub at the bottom and mail it in.

Which CP 575 Version Did You Get? CP 575A Through CP 575J

The letter after "575" tells you which set of paragraphs the IRS printed for your business. Internal Revenue Manual 21.7.13.7.8 assigns the versions this way:

A sole proprietor or single-member LLC with no employees therefore usually holds a CP 575G, which lists no returns at all. Every version confirms the same thing, the EIN assignment, and the IRS refers to them together as the "CP575A-J notice series." Many sole proprietors never get a CP 575, because a sole proprietor with no employees or excise filings can use a Social Security number instead; our guide on whether a sole proprietorship needs an EIN covers that decision.

How Long Does It Take to Get a CP 575?

An online applicant can download the CP 575 immediately; a notice that travels by mail takes longer, up to about four weeks for a mailed application. The timing depends on how the EIN was requested:

The IRS no longer assigns EINs by phone to domestic businesses. Only applicants whose business is based outside the United States can call for one, at 267-941-1099.

What's Printed on the CP 575

The CP 575 runs one to two pages, and banks and agencies read every line of it as proof. A CP 575G an LLC filed publicly with the SEC shows the standard layout:

The two fields people care about most are the EIN and the legal name, because they have to match everywhere else: your bank application, your state registration, your payroll account. The notice warns that any variation "may cause a delay in processing, result in incorrect information in your account, or even cause you to be assigned more than one EIN." IRS systems accept only letters, numbers, hyphens, and ampersands in a business name, so punctuation in your state filing can drop out of the IRS version. On federal tax forms, use the name exactly as the CP 575 prints it.

The "forms you must file" section lists the federal returns the IRS set up for your entity, based on your answers on the application. If you plan to elect S corporation status, the notice still shows the default filing requirement: the IRS updates the account only after it processes Form 2553, and the CP 575 itself points you to Form 8832 and Form 2553. If the list includes employment, excise, or corporate income tax returns, the notice also tells you to expect an EFTPS welcome package for electronic deposits, with the PIN sent separately. Our guide to LLC tax deadlines and filing obligations explains what each of those returns involves.

What You'll Use the CP 575 For

The CP 575 is the document third parties ask for when they want proof your EIN is real and belongs to you. The most common moments:

Opening a business bank account. The IRS says a new EIN can be used immediately to open a bank account, and many banks ask to see the CP 575 (or a 147C), not just the number typed on a form. They use it to match your legal name and EIN against what you give them. If you're at this stage, our guide on how to open a business bank account covers what else to bring.

Setting up payroll. Payroll providers and the IRS's employment-tax system are built around your EIN. When you onboard with a payroll service, it will often request the CP 575 to confirm the EIN and legal name before it files employment taxes on your behalf.

Applying for business licenses and permits. State and local licensing agencies frequently ask for EIN proof. A business license, a sales tax permit, or a professional registration may all require a copy of your confirmation letter.

Applying for loans, credit, and merchant accounts. Lenders, business credit card issuers, and payment processors verify your EIN as part of underwriting and identity checks.

Vendor and contract onboarding. Larger clients sometimes ask new vendors to verify their EIN and legal name before paying invoices, especially when 1099 reporting is involved.

Deactivating an EIN you no longer need. The IRS can't cancel an EIN, but it deactivates one on written request, and it asks for the EIN assignment notice, if you have it, along with the EIN, legal name, address, and your reason.

The through-line: anytime someone needs to confirm "this business is who it says it is, with this exact federal tax ID," the CP 575 is the cleanest proof you can hand over.

Why the IRS Issues the CP 575 Only Once

The IRS generates the CP 575 a single time, when it assigns the EIN, and it cannot produce another copy. The notice says so in its "Important reminders": it "is issued only one time and the IRS will not be able to generate a duplicate copy for you." The IRS page for the notice gives the same answer: the original CP575A-J notice "cannot be duplicated or recreated." When someone asks for a duplicate anyway, IRS procedures tell the assistor to send Letter 147C instead.

What changed in July 2026 is a digital substitute. Business Tax Account, the IRS's online account for businesses, now offers a digital CP575, the Employer Identification Number Verification Notice, under Tax Records. The digital CP575 is a new notice rather than a copy of your original, and the IRS says banks and other institutions accept it as written confirmation of an EIN, in place of both the original CP 575 and Letter 147C. Access depends on your role:

• Sole proprietors with an SSN or ITIN, an EIN, and a Schedule C or Schedule F on their return can register and download it
• Designated officials of partnerships, S corporations, C corporations, tax-exempt organizations, and government entities can download it
• Single-member LLCs that file as sole proprietors can't use Business Tax Account yet, and individual partners and shareholders see transcripts only

At Anna Money, which served more than 60,000 small businesses, I watched the same pattern repeat: a new owner glances at the confirmation letter, clicks away, and months later a bank or payroll provider asks for "the IRS EIN letter." Save the CP 575 the moment you get it: if you applied online, download the PDF and print a copy before you close the browser window. If the window closed before you saved it, call 800-829-4933: the assistor can confirm the EIN and offer Letter 147C by fax or mail. Store the file with your formation documents, in a labeled cloud folder and on paper.

CP 575 vs. 147C: What's the Difference

The CP 575 and Letter 147C confirm the same fact, that the IRS assigned a specific EIN to your business, but they are different documents, and since July 2026 there is a third one, the digital CP575.

Banks and agencies that ask for "your EIN letter" or "your CP 575" generally accept Letter 147C. The IRS EIN page lists three ways to confirm an EIN: a business entity transcript, which shows the EIN, name, address, and filing requirements; the digital CP575; or a call for Letter 147C.

Lost Your CP 575? How to Replace It

A lost CP 575 is replaced, not reissued. Eligible Business Tax Account users can download the digital CP575 in minutes. Everyone else calls the IRS Business & Specialty Tax Line at 800-829-4933, Monday through Friday, 7 a.m. to 7 p.m. local time (Alaska and Hawaii follow Pacific time), and asks for Letter 147C. The assistor can fax the letter during the call or mail it to your address of record, which takes 10 to 14 business days, and releases it only to the owner, a partner, an authorized officer, or a representative with Form 2848 or 8821. Our guide to requesting a 147C letter from the IRS covers that call step by step, including what to have ready.

If you've lost the EIN itself, check the places the IRS suggests first: the original notice, your bank, agencies that issued your licenses, and past business tax returns. Our guide on how to find your EIN number walks through each one.

Only the IRS issues a CP 575, a digital CP575, or a Letter 147C, and it charges nothing for any of them. Be skeptical of any website that offers to "instantly download your CP-575 or 147C" for a fee.

Common Mistakes to Avoid

Not saving the CP 575 when you apply online. The online application shows the notice at the end of the session, and if you chose online delivery, no paper copy follows. Download the PDF and print it before you leave the page.

Asking the IRS to resend the original. The IRS cannot duplicate a CP 575. Download the digital CP575 if you're eligible for Business Tax Account, or request Letter 147C.

Letting the legal name drift. If your bank, your state registration, and your CP 575 don't show the same name, expect delays: the notice warns that name variations can put incorrect information in your account or even get you assigned a second EIN. Copy the name as the CP 575 prints it.

Waiting until the last minute. If you need proof for a Friday closing, don't count on the mail: use the digital CP575 or ask for the 147C by fax.

Ignoring a CP 575 you didn't expect. Identity thieves sometimes open businesses in other people's names, and the victim finds out when a CP 575 arrives. If you never applied for the EIN on the notice, contact the IRS at the number printed on it; the IRS EIN page has a separate section on what to do about an EIN you didn't request.

Books Ready for the Next Bank Request: How Jupid Helps

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Action Checklist

• Save the CP 575 PDF the day you get it, or scan the mailed notice, and file the paper copy with your formation documents
• Check the version letter and the "forms you must file" list against the returns you expect
• Copy the legal name and name control exactly into your bank, state, and payroll records
• If it's lost, sign in to Business Tax Account and open Tax Records for the digital CP575, if you're eligible
• If you're not eligible, call 800-829-4933 (Mon–Fri, 7 a.m.–7 p.m. local time) and ask for Letter 147C by fax or mail
• If a CP 575 arrives for an EIN you never requested, call the number printed on the notice

Sources

• IRS — Employer identification number (EIN confirmation, lost EIN, EIN you didn't request)
• IRS — Understanding your CP575 notice
• IRS — Business Tax Account (digital CP575 and eligibility by entity type)
• IRS — FS-2026-11, Summer 2026 expanded features for Business Tax Account
• IRS — Get an employer identification number (online application hours)
• IRS — Instructions for Form SS-4 (Rev. December 2025)
• IRS — Internal Revenue Manual 21.7.13, Assigning Employer Identification Numbers (CP 575 versions, online notice delivery)
• IRS — Internal Revenue Manual 21.7.1.4.7.1, EIN verification and Letter 147C
• IRS — If you no longer need your EIN
• SEC EDGAR — Example CP 575G notice filed by an LLC

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This guide is for general educational purposes and does not constitute tax, legal, or accounting advice. IRS procedures, phone numbers, and processing times can change. Verify details with the IRS directly and consult a qualified tax professional before relying on any document for a filing or financial application.