Know when the IRS requires an EIN
The IRS assigns an Employer Identification Number as a unique nine-digit federal tax identifier. Corporations and partnerships generally need an EIN, as do businesses with employees and businesses that file certain federal tax returns. The IRS also notes that many banks require an EIN when a business opens a bank account. That makes the EIN part of the practical account-opening checklist even in situations where the tax rules themselves may not force every owner to have one.
Treat the tax requirement and the bank requirement as two separate questions. First determine whether the business needs an EIN under IRS rules. Then ask the bank what taxpayer identification it requires for the exact account and entity. A bank can impose account-opening documentation standards beyond the minimum federal tax-filing requirement, especially when it must verify the customer and legal entity.
Keep the EIN question in the entity setup checklist so it is resolved before the bank application begins. Waiting until the application screen requests a tax number can create unnecessary delays when payroll, merchant processing or a lease depends on the account.
Get the EIN directly from the IRS
For eligible applicants, the IRS provides the EIN without a fee. Use the IRS process rather than paying a third party merely to submit information that can be filed directly. The responsible party should make sure the legal name, entity type and address match the organization records because mismatches can create friction later when the bank compares tax and formation documents.
Do not obtain multiple EINs to solve a documentation problem unless the IRS rules actually call for a new number. If a company changed structure, ownership or tax treatment, check the IRS guidance for whether a new EIN is required. Banks often compare the EIN record with formation documents, so consistency is more useful than trying to accelerate account opening with duplicate applications.
Use only the official IRS site for the application. Third party services can charge for a process the IRS provides without a fee, and they can create confusion about who actually submitted the request or received the confirmation.
Keep proof of the EIN available for account opening
The number itself may not be enough if the bank asks for evidence. In 2026 the IRS added a downloadable CP575 EIN verification notice for eligible Business Tax Account users, and the IRS says that notice can substitute for older CP575 notice series and Letter 147C for verification purposes. Businesses may also use other IRS confirmation methods when appropriate.
Store the confirmation with the company’s formation records rather than in an employee email inbox. If a bank application stalls because the legal name on the IRS record differs from the formation documents or DBA registration, resolve the mismatch before opening additional accounts. The goal is a clear chain showing the legal entity, its tax identifier and the people authorized to act for it.
If the original notice is missing, solve that before an urgent financing or banking deadline. A verified digital notice or other IRS confirmation is more reliable than copying the number from an old invoice, bookkeeping file or employee note.
Understand the sole proprietor exception carefully
A sole proprietor may be able to use a Social Security number for federal tax purposes in situations where an EIN is not otherwise required, but that does not guarantee that every bank will open a business account without an EIN. The bank can establish its own product rules and may ask for an EIN, a DBA registration, local license or other evidence of the business.
This distinction matters because online articles often turn “may not need an EIN for taxes” into “does not need an EIN for banking.” Those are not the same statement. A sole proprietor should check the chosen bank before submitting the application, especially if the business uses a trade name or expects to add employees later.
A sole proprietor planning to hire employees or change entity structure should also consider whether the tax requirements are about to change. The banking decision should fit the near future rather than only the owner’s current filing status.
Separate EIN proof from beneficial ownership checks
An EIN identifies the business for federal tax purposes. It does not identify the humans who own or control the business. Banks have separate customer identification and customer due-diligence obligations. Under FinCEN’s CDD framework, covered financial institutions may need information about individuals who own 25 percent or more of a legal entity and one person with significant responsibility to control or manage it, subject to exemptions and the bank’s procedures.
In February 2026 FinCEN granted relief from repeating beneficial-owner identification every time the same legal-entity customer opens another account. That relief does not turn the EIN into a substitute for ownership information. The bank may still ask again when prior information is unreliable or its risk-based procedures call for an update.
Banks may also apply their own risk based procedures beyond the minimum CDD mechanics. That is why two institutions can request different supporting documents even when both are opening an account for the same legal entity.
Prepare the rest of the bank application at the same time
The EIN is only one part of an account-opening package. A bank may also request articles or certificates of formation, an operating or partnership agreement, DBA documentation, business address, government identification for signers, beneficial ownership information and details about expected activity. Higher-risk activities or advanced treasury services can trigger additional questions.
Before applying, create one current document set with consistent legal name, address and ownership information. This reduces back-and-forth and makes it easier to open additional accounts later. If the company has recently changed address, ownership or entity type, update the relevant records before assuming the existing EIN confirmation will answer every bank question.
Create a one page cover sheet listing legal name, DBA, EIN, formation state, business address, owners and authorized signers. It gives the person handling the application a fast way to check that every supporting document tells the same story.
Editorial Verdict
Use the IRS as the source of truth for the EIN.
Get the EIN directly from the IRS when required, keep current proof of the number, and confirm the bank’s own documentation rules before applying. The EIN solves the federal tax-identifier piece of the application, but it does not replace entity, signer or beneficial-ownership verification.