Claim Your EIN and Open a Business Bank Account

Key Takeaways

• Getting an Employer Identification Number (EIN) is a free service provided by the IRS, and you should never pay a third-party site to file it for you.
• You must apply for an EIN between 7:00 a.m. And 10:00 p.m. ET, Monday through Friday, to use the official online application.
• Most banks require a stamped EIN Confirmation Letter (CP 575) and your Articles of Organization to open a business checking account.
• Using an EIN instead of your Social Security Number on W-9s reduces your risk of identity theft when dealing with new vendors.

This guide helps solo owners and new partners transition from a hobby to a formal entity. By the end of this walkthrough, you'll have the tax ID required to hire employees, open a merchant account. And keep your personal and business cash completely separate.

In April 2024, a freelance designer in Chicago lost two weeks of work because she couldn't open a business bank account in time to receive a $10,000 wire transfer. She had the LLC paperwork but had forgotten to apply for her EIN, and the bank wouldn't budge. Don't let a ten-minute administrative task stall your cash flow.

What you'll need

• Your Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN)
• A physical U.S. Mailing address (the IRS won't accept P.O. Boxes for the business location)
• The legal name of your business as registered with your Secretary of State
• The date you started or acquired the business
• Your specific business structure (Sole Prop, LLC, Partnership, or Corporation)

Step-by-step

Step 1: Verify your legal formation

Before you touch the IRS website, ensure your business name is legally yours. If you're operating as an LLC or a Corporation, you must have your approved filing documents from your state. The IRS will ask for the exact legal name and the date the entity was formed. If those dates don't match your state records, it can cause headaches later during tax season.

If you're a sole proprietor using a name other than your own, you should have your Doing Business As (DBA) or Fictitious Name certificate ready. You can learn more about this process in our Register Your Business DBA guide. Ensure the spelling is identical across all documents. Even a missing comma can cause a bank to reject your application later.

Step 2: Access the IRS EIN Assistant

Go to the official IRS.gov EIN application page. Don't use search engines to find this link, as many predatory sites look like the IRS but charge $100 to $300 for a free service. The official site only operates during specific hours: Monday through Friday, 7 a.m. To 10 p.m. Eastern Time.

Once you click 'Apply Online Now,' you've 15 minutes to complete each screen before the session times out. Don't start this while you're distracted. You'll select your entity type first. Most new owners pick 'Sole Proprietor' or 'Limited Liability Company.' If you're an LLC with only one member, the IRS still considers you a 'Disregarded Entity' for tax purposes, but you still need the EIN for banking.

Step 3: Define your 'Reason for Applying'

The system will ask why you need the number. For most readers, the answer is 'Started a new business.' Other options include 'Hired employees' or 'Banking purposes.' If you're simply moving from a sole proprietorship to an LLC, you usually need a new EIN because the legal structure has changed.

After selecting the reason, you'll provide the name and SSN of the 'Responsible Party.' This must be an individual, not another business entity. This person controls or manages the entity. The IRS uses this to tie the business to a human who's accountable for tax filings. You can read about the specific roles of a responsible party at IRS.gov.

Step 4: Download your CP 575 Confirmation

This is the most critical part of the process. Once you submit the application, the system generates a PDF letter called the CP 575. This is your official proof of EIN. Download it immediately. Print two copies. Save a digital copy in a secure cloud folder.

If you close the browser before saving this PDF, the IRS won't show it to you again online. You would have to call them or wait weeks for a copy to arrive by mail. Banks will almost always demand to see this specific letter to prove the EIN belongs to your business name. Without it, you're stuck in administrative limbo.

Step 5: Open your business entry point

Take your CP 575 and your state formation documents to a bank. Avoid using your personal checking account for business. Mixing funds is the fastest way to lose the liability protection your LLC provides. Check out our guide on 4 LLC Mistakes That Quietly Pierce Your Shield to see why this matters.

When choosing a bank, look for 'Small Business Checking' with no monthly fees or low minimum balance requirements. Many online-only banks like Mercury or Relay are popular for solo owners, but local credit unions often provide better service for cash-heavy businesses like landscaping or retail. Ask specifically about their 'ACH' and 'Wire' limits so you don't get surprised when a big client payment is held up.

Common mistakes to avoid

• Paying a filing fee: If a website asks for a credit card to get your EIN, you're on a scam site. The IRS never charges for this.
• Applying as the wrong entity: Don't select 'Corporation' if you just filed LLC paperwork. Changing this later requires mailing a physical letter to the IRS service center and waiting months for a correction.
• Missing the 15-minute window: If you walk away to grab a coffee, the IRS site will kick you out. You'll have to start over, and sometimes the system flags your SSN for 'too many attempts' in one day.
• Using a P.O. Box: The IRS requires a physical location for the 'business address.' You can use a separate mailing address, but the physical location must be a street address. Use your home address if you don't have an office yet.

When to call a pro

While the application is simple, the tax implications of your entity choice aren't. If you aren't sure if you should be taxed as an S-Corp or a C-Corp, talk to a CPA before you click submit. A CPA can also help you understand how to file your first Form 1040 Schedule C next year. If you have multiple partners or complex ownership, have an attorney review your Operating Agreement before you apply for the EIN, as the ownership percentages should match your internal records.

Have you checked if your desired business name is actually available for registration yet? Make sure you Check Business Name Availability before you tie an EIN to a name you might have to change later.

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📋 Disclaimer

This article is for informational purposes only and does not constitute legal, tax, financial, or professional advice. Laws and regulations change frequently, and the information presented may not reflect the most current legal developments. Always consult with a qualified professional (CPA, attorney, financial advisor) before making business decisions based on this content. MyBizNerd may receive compensation through affiliate links, but this never influences our recommendations.

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