If you have ever set up direct deposit, paid a bill electronically, or transferred money between bank accounts, you may have been asked for a routing number. But what is a bank routing number, and how is it different from your account number?
A routing number is a nine-digit code that identifies a specific U.S. bank or credit union. It helps financial institutions direct payments to the right organization. Your account number then identifies your individual checking or savings account at that institution.
Routing number explained
A bank routing number is also called an ABA routing number or routing transit number. The American Bankers Association introduced the system to help process checks, and routing numbers are now used for many electronic transactions as well.
The number identifies the financial institution involved in a payment—not the person receiving the money. For example, when an employer sends your paycheck by direct deposit, the routing number tells the payment network which bank should receive the funds. Your account number tells the bank which account should be credited.
Routing numbers are used for transactions such as:
- Direct deposits, including paychecks and government benefits
- Automatic bill payments and recurring transfers
- Electronic checks and ACH payments
- Transfers between U.S. bank accounts
- Some domestic wire transfers
Routing number vs. account number
The simplest way to understand the difference is to think of an envelope. The routing number is like the destination bank’s address. The bank account number identifies the specific account inside that bank.
| Number | What it identifies | Common use |
|---|---|---|
| Routing number | Your bank or credit union | Direct deposits, ACH payments and some wires |
| Bank account number | Your individual checking or savings account | Receiving or sending money from that account |
Both numbers may be required for a payment. Entering one incorrectly can delay a transaction or send it to the wrong destination. Check the instructions carefully before submitting your banking information. How to Manage Money Effectively: A Practical Monthly System
How to find your bank routing number
You can usually find a routing number in several places:
- On a paper check: The routing number is generally the first nine-digit number printed along the bottom. The account number usually follows it, although the order can vary.
- In online or mobile banking: Look under account details, account information, direct deposit instructions or payment settings.
- On a bank statement: Some statements list the routing number near your account details.
- Through your bank: Contact customer service or visit a branch and ask which routing number applies to your transaction.
- On the bank’s official website: Many institutions publish routing numbers, often in their help center or wire-transfer instructions.
Do not rely on a random search result if you can verify the number through your bank. Large banks may use different routing numbers based on the state where you opened your account, the type of transaction, or the payment method. How to Manage Money Effectively: A Practical Monthly System Source: Federal Reserve Bank of Chicago
Do ACH and wire transfers use the same routing number?
Not always. A bank can have one routing number for ACH transactions and another for domestic wire transfers. Some institutions also use different numbers for incoming and outgoing wires.
Before arranging a transfer, ask for the routing number specifically required for that payment. If you are receiving money, use the instructions provided by your bank. A routing number shown on a check may not be the correct number for an international or domestic wire.
Is a routing number confidential?
A routing number by itself is not usually considered highly secret; it identifies the financial institution and can appear on checks. However, it becomes sensitive when combined with your account number, name, login credentials or other personal details.
Share banking information only with a trusted employer, company or financial institution, and confirm unexpected requests independently. Your bank will not normally need your online banking password or one-time security code to verify a payment.
Do other countries use routing numbers?
The nine-digit ABA routing number system is used for U.S. banking transactions. Other countries use different identifiers, such as sort codes, branch codes, SWIFT or BIC codes, and international bank account numbers. If you are sending money internationally, ask the receiving bank which details are required.
Key takeaway
So, what is a bank routing number? It is a nine-digit identifier for a U.S. bank or credit union. It directs a payment to the correct institution, while your account number identifies your specific account. When setting up a deposit or transfer, verify both numbers—and confirm whether the payment uses ACH or wire instructions—to help prevent delays and errors.