Your account number and routing number are printed on your checks, and your bank can tell you both in seconds
Your checking account number is a unique identifier for your specific account at your bank. Your routing number identifies the bank itself. Both appear on the bottom left of every check you write, printed in a standard format that machines can read. If you do not have checks, your bank's website, mobile app, or a phone call to customer service will show you both numbers within minutes.
You need these numbers when you set up direct deposit, arrange automatic bill payments, or receive a wire transfer. Knowing where to find them and how to read them saves time and prevents errors that can delay money moving between accounts.
Key Takeaways
- Your routing number appears first on the bottom left of a check, followed by your account number, then the check number.
- The routing number is nine digits and identifies your specific bank branch; the account number is typically 10 to 12 digits and identifies your account.
- If you do not have checks, log into your bank's website or app, call the number on the back of your debit card, or visit a branch in person.
- Some banks display these numbers on statements or in the account settings section of their mobile app.
Reading the numbers on a check
The bottom of a check contains three sets of numbers printed in a special machine-readable format called MICR (Magnetic Ink Character Recognition). From left to right, you see the routing number first, then the account number, then the check number.
The routing number is always nine digits. It tells the banking system which bank and which branch the money should come from. The account number comes next and is typically 10 to 12 digits, though it varies by bank. The check number appears last and is unique to that single check.
If you look at a physical check, the numbers are printed in a distinctive font at the bottom. They are also printed in regular text in the top right corner of the check for human reference. The routing number in the top right matches the machine-readable routing number at the bottom.
Finding your numbers without a check
If you do not have checks or prefer not to write one, your bank makes these numbers available through several routes. Log into your bank's website or mobile app and look for account details, account information, or settings. Many banks display both numbers on the main account page or in a dedicated section labeled "Account Details" or "Routing Information."
You can also call the customer service number on the back of your debit card. A representative can read both numbers to you over the phone in under a minute. If you prefer in person, visit a branch with your ID and ask a teller to write down your routing and account numbers.
Some banks include these numbers on your monthly statement, usually on the first page. Check the section that lists your account information or contact details.
Why the routing number matters for transfers
The routing number tells the banking system which institution holds the account. When you set up direct deposit from an employer or receive a wire transfer, you provide the routing number so the money goes to the correct bank. If you give the wrong routing number, the transfer may go to a different bank entirely, and recovering the money takes days or weeks.
Routing numbers are public information — they are printed on every check and published by the Federal Reserve. Knowing someone's routing number alone does not let them access your account. They also need your account number, and even then, they cannot withdraw money without authorization.
Why the account number matters for direct deposit and payments
Your account number identifies your specific account within the bank. When combined with the routing number, it tells the banking system exactly where to send or pull money. If you transpose digits in your account number, the transfer may go to someone else's account at the same bank, or the transaction may be rejected outright.
Always double-check both numbers before submitting them for direct deposit, automatic bill payments, or wire transfers. Many banks allow you to verify the account holder's name before the first transfer goes through, which catches errors before money moves.
Differences between routing numbers and account numbers
| Routing Number | Account Number |
|---|---|
| Identifies the bank and branch | Identifies your specific account |
| Always 9 digits | Usually 10 to 12 digits (varies by bank) |
| Same for all customers at that bank | Unique to you |
| Public information | Sensitive; treat like a password |
| Printed first on a check | Printed second on a check |
What happens if you give the wrong number
If you provide an incorrect routing number, the transfer usually fails and bounces back to the sender within one to three business days. The sender's bank will reject it because the routing number does not match any real institution, or it matches a different bank entirely.
If you provide an incorrect account number but a correct routing number, the money may go to another customer's account at the same bank. This is rarer because most banks now verify the account holder's name before processing transfers, but it can happen with older payment systems. Contact your bank when ready if you realize you sent money to the wrong account number — the bank can sometimes retrieve it, but speed matters.
Frequently Asked Questions
Can someone access my account if they know my routing and account number?
No. They would also need your PIN, password, or authorization to move money. Your routing and account numbers are necessary information for legitimate transfers, but they are not sufficient to access or control your account. Treat your account number as sensitive, but do not panic if it becomes known.
Do I need a routing number for online transfers between my own accounts?
Not always. If both accounts are at the same bank, you can usually transfer between them through your bank's website or app without entering a routing number. If the accounts are at different banks, you will need the routing number of the receiving bank.
Is the routing number the same for all branches of my bank?
Usually, but not always. Larger banks may have different routing numbers for different regions or branches. If you move or switch branches, confirm the routing number with your bank before setting up direct deposit or automatic payments. Your checks will have the correct routing number printed on them.
What if my bank does not show the routing number in the app?
Call the customer service number on the back of your debit card or visit a branch. Every bank has a routing number — some just do not display it prominently in their digital tools. A representative can provide it in seconds.
Do I need both numbers for a wire transfer?
Yes. A wire transfer requires the routing number to identify the receiving bank and the account number to identify the specific account. You may also need the bank's name and address, depending on whether it is a domestic or international wire.