What you need to open a bank account (and why banks ask for it)

Opening a bank account can feel like showing up to a DMV line you didn't know existed — driver's license, Social Security number, sometimes a second ID, sometimes a piece of mail. None of that paperwork is arbitrary. It's the visible part of a federal rule banks don't get to skip, and knowing what's actually required (versus what's just one bank's habit) makes the process faster and less confusing.

The federal rule behind the paperwork

Every bank and credit union has to run a Customer Identification Program (CIP) — sometimes called "know your customer" — as a condition of its charter. Per the OCC's consumer-help site, the legal basis sits in federal banking regulation 31 CFR 1020, part of the Bank Secrecy Act framework aimed at preventing money laundering and identity fraud in the banking system. The rule doesn't leave the specifics to chance: before opening an account, a bank must collect and verify four pieces of information about you.

1. Your name
2. Your date of birth (for individual applicants)
3. Your address
4. An identification number

That fourth item is where most of the friction lives, so it's worth breaking out.

What counts as an identification number

For most U.S. citizens, the identification number is simply your Social Security number. Banks may require it "in certain circumstances," and account opening is explicitly one of them, per the OCC.

If you don't have an SSN — a common situation for newer residents or certain visa holders — the rule doesn't dead-end. The CFPB is explicit on this point: "You do not need a social security number to get a bank or credit union account." Acceptable alternatives include:

• An Individual Taxpayer Identification Number (ITIN)
• A passport number and country of issuance
• An alien identification card number
• The number and country of issuance of another government-issued document that shows your nationality or residency and carries a photo or similar safeguard

U.S. companies opening a business account use an Employer Identification Number (EIN) instead.

Photo ID: banks can ask for more than one

Beyond the identification number, banks verify who you are by reviewing documents — typically a driver's license or passport — or, in some cases, through a consumer reporting agency or a reference from another financial institution. The OCC notes banks are permitted to require more than one form of picture identification if their internal policy calls for it; there's no single federal list of "the two IDs every bank must accept," so the exact combination is bank-specific.

In practice, that plays out as a common industry pattern the CFPB describes: most banks and credit unions ask for two forms of ID, or will accept one photo ID plus a document showing your name and current address — a utility bill or lease, for example. That second piece is standing in for the "address" data point CIP requires; it's a practical way to prove it, not a separate federal mandate.

The deposit, the age rule, and the screening check

Three more things come up almost every time an account gets set up, none of them part of CIP itself:

• Minimum opening deposit. Many banks require some initial deposit to activate the account — commonly a small amount, though this varies widely by bank and account type, and a growing number of online accounts require $0 to get started. Check the specific account's disclosure rather than assuming a figure.
• Age. You generally need to be 18 (the age of legal contracting capacity in most states) to hold an account in your own name alone. Younger account holders aren't excluded — they're typically added as a joint owner with a parent or guardian, or through a dedicated custodial or teen account product, rather than opening a standalone adult account.
• Account-history screening. Many banks check a specialty consumer report before approving a new checking account — most commonly through ChexSystems, which the CFPB lists as a consumer reporting company in its check-and-bank-account-screening category. It tracks things like unpaid overdrafts or account-closure history at other banks, not your credit score. Because it's a consumer report, the same Fair Credit Reporting Act (FCRA) protections that cover credit bureaus cover ChexSystems too: you can request a free report once every 12 months (the CFPB says the company must provide it within 15 days of your request), and you have the right to dispute anything on it that's wrong.

Bringing your documents together

Before you walk in — or start an online application — it helps to have on hand:

• A government-issued photo ID (driver's license, state ID, passport, or military ID)
• Your SSN, ITIN, or one of the alternative identification numbers above
• Something that shows your current address if your photo ID is out of date on that front
• Enough cash (or a linked funding source) to cover whatever the specific account's minimum opening deposit is, if any

One clarifying note on who does what: ClearValue Banking is an independent education and comparison publisher, not a bank. We explain the rules and help you compare accounts against a published standard — but the account itself is opened and held by the bank or credit union you choose, and that institution runs its own CIP check on you directly.

Once the account is open, see how FDIC insurance and NCUA share insurance protect what's in it, and what checking account fees to watch for. Then compare accounts against one published standard so the one you pick actually fits how you bank.