Routing Number vs Account Number: What's the Difference?

Updated

When setting up direct deposit, wire transfers, or automatic payments, you’re asked for two key numbers: your routing number and your account number. They work together but serve different purposes — getting either one wrong can delay or misdirect your money.

Here’s the simple breakdown: your routing number identifies which bank, while your account number identifies which account at that bank.

Quick Comparison

Feature Routing Number Account Number
Purpose Identifies your bank Identifies your account
Length Always 9 digits Varies (8-17 digits)
Shared Same for many customers Unique to you
Confidentiality Public (on checks, websites) Keep private
Changes Rarely (only if bank merges) Never changes
Location on check Bottom-left (first 9 digits) After routing number

Routing Number Explained

A routing number (officially called an ABA routing transit number) is a 9-digit code assigned to every US financial institution. It tells the banking system where to send your money.

Key facts about routing numbers:

  • Always exactly 9 digits
  • Assigned by the American Bankers Association
  • Shared by many customers at the same bank
  • May vary by state for large banks
  • Printed on checks and published on bank websites

Example routing numbers:

Bank Routing Number
Chase (NY) 021000021
Bank of America (CA) 121000358
Ally Bank 124003116
Capital One 051405515
Navy Federal 256074974

You can find your routing number on your checks, in your bank’s app, or on their website. See our guide on how to find your routing number.

Account Number Explained

Your account number is a unique identifier for your specific account at your bank. No two customers at the same bank have the same account number.

Key facts about account numbers:

  • Length varies by bank (typically 8-17 digits)
  • Unique to your specific account
  • Different for each account you have (checking vs. savings)
  • Should be kept confidential
  • Never changes unless you open a new account

Unlike routing numbers, account numbers are not public information. While your routing number appears on every check and your bank’s website, your account number should be shared only when necessary for legitimate transactions.

Where to Find Them on a Check

Both numbers appear at the bottom of every check:

⌞ 121000358 ⌟   ⌞ 4851234567 ⌟   1001
   Routing          Account         Check
   Number           Number          Number

Reading order (left to right):

  1. Routing number — First 9 digits (enclosed in ⌞ ⌟ symbols)
  2. Account number — Middle digits (length varies by bank)
  3. Check number — Last 3-4 digits (matches number in top corner)

Note: Some checks reverse the order, placing the check number first. The routing number is always exactly 9 digits, which helps identify it.

When You Need Each Number

Both Numbers Required

Transaction Why Both?
Direct deposit setup Employer needs to know which bank (routing) and which account (account)
Wire transfer Sender needs bank identification and your specific account
ACH transfer External bank needs both to complete the transfer
Linking accounts Plaid and bank verification require both
Tax refund deposit IRS needs both to electronically deposit your refund
Automatic bill pay Creditors need both to pull payments from your account

Only Routing Number Needed

Transaction Why?
Verifying which bank Routing number identifies the institution
Wire transfer lookup Different routing numbers for wire vs. ACH
Bank validation Employers may verify bank exists before setting up payroll

Neither Number Needed

Transaction Why?
Zelle payments Uses email/phone instead
Debit card purchases Card number handles the transaction
ATM withdrawals Card and PIN are sufficient
Internal transfers Between your accounts at same bank
Venmo/PayPal (person-to-person) Uses linked card or balance

Multiple Accounts, Multiple Numbers

If you have multiple accounts at the same bank:

Account Routing Number Account Number
Checking Same Different
Savings Same Different
Money Market Same Different

Your routing number stays the same (it identifies the bank), but each account has its own unique account number.

Example at Chase (New York):

  • Checking account: Routing 021000021, Account 485123456
  • Savings account: Routing 021000021, Account 485789012
  • Money Market: Routing 021000021, Account 485345678

Security: What to Protect

Routing Numbers Are Public

Your routing number is not confidential:

  • Printed on every check you write
  • Published on your bank’s website
  • Same for thousands of other customers
  • Cannot be used alone to access your account

Someone knowing your routing number alone cannot steal your money or access your account.

Account Numbers Should Stay Private

Your account number requires more protection:

  • Unique to your specific account
  • Needed to initiate transfers FROM your account
  • Combined with routing number, enables ACH debits
  • Should only be shared for legitimate transactions

Best practices:

  • Don’t share account numbers on social media or unsecure platforms
  • Verify legitimacy before giving account numbers to businesses
  • Monitor your account regularly for unauthorized transactions
  • Use virtual account numbers when available (some banks offer this)

What If Someone Has Both Numbers?

If someone has both your routing and account numbers, they could potentially:

  • Set up unauthorized ACH debits (automatic withdrawals)
  • Create fake checks using your account information
  • Attempt fraudulent wire transfers

Your protections:

  • Banks monitor for suspicious activity
  • You have 60 days to report unauthorized ACH debits
  • Check fraud is illegal and traceable
  • Wire transfers require additional verification

If you suspect your account information was compromised, contact your bank immediately to enable additional security measures or get new account numbers.

Common Mistakes to Avoid

Mistake 1: Confusing the Two Numbers

Problem: Entering your account number where routing number is requested (or vice versa)
Result: Transfer fails or goes to wrong place
Prevention: Remember — routing is always exactly 9 digits

Mistake 2: Using the Wrong Routing Number

Problem: Using a routing number from the wrong state (for banks like Chase with multiple routing numbers)
Result: Transfer may fail or be delayed
Prevention: Use the routing number in YOUR bank app, not a generic one from the internet

Mistake 3: Using Checking Number for Savings

Problem: Entering checking account number when you wanted funds in savings
Result: Money goes to wrong account
Prevention: Each account has its own number — verify before submitting

Mistake 4: Using Wrong Routing Number for Wire Transfers

Problem: Some banks have different routing numbers for ACH vs. wire transfers
Result: Wire transfer fails or is delayed
Prevention: Confirm with your bank which routing number to use for wires

Wire Transfer vs. ACH Routing Numbers

Some banks use different routing numbers depending on the transfer type:

Bank ACH Routing Wire Routing
Chase State-specific 021000021
Bank of America State-specific 026009593
Wells Fargo State-specific 121000248
Capital One 051405515 051405515 (same)
Ally 124003116 124003116 (same)
USAA 314074269 314074269 (same)

When receiving a wire transfer, always confirm with your bank which routing number the sender should use.

How to Verify You Have the Right Numbers

Before initiating important transfers:

  1. Check your bank’s app — most reliable source
  2. Match against a check — if you have one
  3. Use ABA’s official tool — routingnumber.aba.com
  4. Call your bank — for wire transfer routing number confirmation

Taking 30 seconds to verify can save days of dealing with misdirected funds.

Frequently Asked Questions

Does my routing number change if I move to a different state?

No. Your routing number is based on where you opened your account, not where you currently live. A Chase account opened in California keeps its California routing number even if you move to Texas.

Can I have two accounts with the same account number?

No. Even if you have accounts at different banks, the combination of routing number + account number is unique. Two different banks might assign similar account numbers, but the routing numbers would be different.

What if I close an account and open a new one?

You’ll get a new account number. The routing number stays the same (assuming you stay with the same bank in the same state).

Are routing numbers used internationally?

No. Routing numbers (ABA numbers) are only used in the United States. International transfers use SWIFT/BIC codes and IBAN numbers, which are different systems entirely.