What Is a Routing Number? How to Find and Use Your Bank Routing Number

A routing number is a nine-digit code used to identify a bank or credit union in the United States. You may need this number when setting up direct deposit, paying bills, transferring money, receiving a tax refund, or connecting your bank account to a payment service.

Although a routing number may look like a random sequence of digits, it tells the banking system which financial institution should receive or process a transaction. Entering the wrong number can delay a payment, send money to the wrong institution, or cause a transfer to be rejected.

This guide explains what a routing number is, where to find it, and how it differs from an account number, SWIFT code, and IBAN.

What Is a Bank Routing Number?

A bank routing number—also called an ABA routing number or routing transit number (RTN)—is a nine-digit identification number assigned to an eligible U.S. financial institution.

The American Bankers Association introduced the routing-number system to help identify the financial institution responsible for processing a payment. Today, routing numbers are used across checks, Automated Clearing House payments, direct deposits, and other banking transactions.

A routing number identifies the bank, while an account number identifies the individual customer account held at that bank.

For example:

• Routing number: identifies the bank or credit union.
• Account number: identifies your personal checking or savings account.
• Check number: identifies a particular paper check.

What Is a Routing Number Used For?

You may be asked to provide your routing number when completing several common banking activities.

1. Setting Up Direct Deposit

Employers, universities, government agencies, and other organizations may request your routing and account numbers to deposit money directly into your bank account.

Direct deposit is commonly used for:

• Employee salaries
• Scholarship payments
• Student financial aid
• Government benefits
• Pension payments
• Tax refunds

2. Making ACH Transfers

An Automated Clearing House transfer is an electronic bank-to-bank payment processed through the ACH network. Businesses frequently use an account number and routing number to collect bill payments electronically.

ACH transfers may include:

• Online bill payments
• Transfers between your bank accounts
• Automatic rent payments
• Credit card payments
• Subscription payments
• Person-to-person bank transfers

3. Sending or Receiving Wire Transfers

Banks may require a routing number when processing domestic wire transfers. However, the routing number used for a wire transfer may be different from the one used for ACH payments or paper checks.

Before sending a large payment, confirm the correct wire transfer routing number directly with the bank.

4. Ordering and Using Checks

A routing number is printed on the bottom of most U.S. paper checks. It helps the banking system determine which institution should process the check.

5. Receiving a Tax Refund

When requesting a tax refund through direct deposit, you will usually need to provide your bank routing number, account number, and account type.

Where Can You Find Your Routing Number?

There are several reliable ways to locate the correct bank routing number.

On a Paper Check

On most personal checks, the routing number is the first nine-digit number printed in the lower-left corner.

The numbers usually appear in this order:

1. Routing number
2. Account number
3. Check number

The American Bankers Association confirms that the nine-digit number in the bottom-left corner of a check is generally the routing number.

Through Online or Mobile Banking

Sign in to your bank’s website or mobile application and look under sections such as:

• Account details
• Direct deposit information
• Bank information
• Account and routing numbers
• Wire transfer instructions

Some banking apps hide part of the account information until you complete an identity-verification step.

On a Bank Statement

Your routing number may appear on a printed or electronic bank statement. However, not every bank includes it, so you may need to check your online account instead.

On the Bank’s Official Website

Many banks publish routing numbers on their official websites. Large banks may have different numbers based on:

• The state where the account was opened
• The type of transaction
• Whether the payment is an ACH or wire transfer
• A bank merger or acquisition

Always use the bank’s official website rather than an unverified third-party routing-number directory.

Through an Official Routing Number Directory

The Federal Reserve’s E-Payments Routing Directory allows users to search basic routing information for institutions participating in FedACH and Fedwire services.

The ABA also provides a routing-number lookup service intended to help users confirm a financial institution’s routing number.

Routing Number vs Account Number

Routing numbers and account numbers serve different purposes, even though they are often requested together.

Routing number

• Identifies the financial institution
• Usually contains nine digits
• May be shared by many customers
• Can differ depending on the transaction or account location

Account number

• Identifies your individual account
• Length varies by bank
• Is unique to your checking or savings account
• Should be treated as sensitive financial information

Entering the correct routing number but the wrong account number may send a payment to the wrong account or cause the transaction to fail.

ACH Routing Number vs Wire Routing Number

Some banks use one routing number for every transaction, while others use separate numbers.

An ACH routing number is generally used for:

• Direct deposits
• Automatic payments
• Online bill payments
• Standard electronic bank transfers

A wire routing number may be required for:

• Domestic wire transfers
• Large or urgent payments
• Real estate transactions
• Same-day bank transfers

Wire transfers are often faster but may involve higher banking fees. Because wires can be difficult to reverse, verify all bank details before authorizing the payment.

Routing Number vs SWIFT Code and IBAN

A routing number is mainly associated with the U.S. banking system. International payments may require other banking identifiers.

SWIFT or BIC code

A SWIFT code identifies a bank during international financial transactions. It normally contains 8 or 11 characters.

IBAN

An International Bank Account Number identifies a particular bank account in countries that use the IBAN system. The United States does not generally use IBANs for domestic bank accounts.

Routing number

A routing number identifies a U.S. bank or credit union and is commonly used for domestic ACH payments, checks, direct deposits, and wire transfers.

An international transfer to a U.S. account may require:

• The recipient’s full name
• Bank account number
• Wire routing number
• Bank name and address
• SWIFT code
• Correspondent bank details

Requirements vary, so ask the receiving bank for its official international wire instructions.

Is It Safe to Share a Routing Number?

A routing number is not normally secret because the same number may be used by thousands of customers and may appear publicly on checks or bank websites.

However, the combination of your routing number, account number, name, and other personal details can be misused for unauthorized payments or fraudulent withdrawal attempts.

Protect yourself by following these precautions:

• Share banking details only with trusted organizations.
• Confirm payment instructions before sending money.
• Never share online banking passwords or verification codes.
• Avoid entering banking information through links in unexpected emails.
• Review account transactions regularly.
• Contact your bank immediately if you notice an unauthorized payment.
• Verify wire instructions by calling a trusted phone number.

What Happens If You Use the Wrong Routing Number?

Using an incorrect routing number may result in:

• A rejected transaction
• Delayed direct deposit
• Returned payment fees
• Money being routed to the wrong institution
• Problems receiving salary or a tax refund
• Additional bank investigation

Contact the bank or payment sender as soon as possible. Do not wait for the transaction to correct itself, especially when dealing with a wire transfer.

Frequently Asked Questions

Is a routing number always nine digits?

A standard U.S. ABA routing number contains nine digits.

Can one bank have multiple routing numbers?

Yes. A bank may have several routing numbers because of its size, operating regions, past mergers, or the type of payment being processed.

Do savings accounts have routing numbers?

A savings account uses a routing number associated with its bank or credit union. You will normally provide both the routing number and your individual savings-account number.

Can I find my routing number using my debit card?

The routing number is not usually printed on a debit card. Check your banking application, account statement, paper checks, or the bank’s official website.

Is a routing number the same as a branch number?

Not always. In the United States, an ABA routing number identifies a financial institution or processing location. Other countries may use branch codes, transit numbers, sort codes, IBANs, or similar identifiers.

Final Takeaway

A routing number is a nine-digit code that identifies a U.S. bank or credit union during financial transactions. It is commonly required for direct deposits, ACH payments, bill payments, checks, and domestic wire transfers.

Before submitting bank details, confirm whether the payment requires an ACH routing number or a wire routing number. The safest sources are your bank’s official website, mobile application, customer service department, or an official ABA or Federal Reserve directory.

Official Sources

• American Bankers Association — Routing Number Information
• ABA — Routing Number Policy and Procedures
• Federal Reserve Financial Services — E-Payments Routing Directory
• Consumer Financial Protection Bureau — ACH Transactions