Where to find both numbers on your check

Your routing number and account number are printed at the bottom left of every check you write. The routing number comes first—it's a nine-digit code that identifies your bank. Your account number follows it and is usually 10 to 12 digits long. Both are printed in magnetic ink that machines can read, which is why they sit in that specific spot rather than anywhere else on the check.

The order matters because it's standardized across all U.S. banks. When you look at the bottom of a check from left to right, you'll see the routing number, then your account number, then the check number on the far right. This layout has been the same for decades, so the location doesn't change between banks or check styles.

If your checks are blank or you haven't ordered them yet, you can find both numbers on your bank statement or by logging into your online banking account. Your bank's website or mobile app will display them under account information or settings. You can also call your bank's customer service line and they'll read them to you over the phone.

Key Takeaways

  • The routing number (nine digits) appears first at the bottom left of your check, followed by your account number (10 to 12 digits).
  • Both numbers are printed in magnetic ink at the bottom of the check so machines can process it automatically.
  • If you don't have a check in front of you, your bank statement or online banking portal will show both numbers.
  • The routing number identifies your specific bank branch, while the account number identifies your specific account within that bank.

Why these numbers are positioned at the bottom

Banks place the routing and account numbers at the bottom of checks because that's where check-processing machines expect to find them. When you deposit a check, it goes through a scanner that reads those magnetic numbers automatically. If they were printed anywhere else, the machine wouldn't be able to process the check quickly.

The magnetic ink used to print these numbers is called MICR (Magnetic Ink Character Recognition). It's darker and thicker than regular ink so scanners can distinguish it from the rest of the printed information on the check. This is also why you should never write over or alter these numbers—doing so can make the check unreadable to machines and cause processing delays.

What each number tells you

Your routing number is specific to your bank and often to your branch. The first four digits identify the Federal Reserve district where your bank operates. The next four digits identify your specific bank. The last digit is a check digit that helps machines verify the routing number is correct. Different banks have different routing numbers, so if you switch banks, your routing number will change.

Your account number is unique to you within your bank. No one else at your bank has the same account number, even if they have the same name. This is what distinguishes your checking account from every other account at that bank. Your account number stays the same as long as you keep that account open, even if you move to a different branch of the same bank.

How to read the numbers if they're hard to see

Sometimes the magnetic ink fades or the check is worn, making the numbers difficult to read. If you're having trouble seeing them clearly, try tilting the check under a light at an angle. The raised texture of the magnetic ink will cast a shadow that makes the numbers more visible.

If the numbers are still unclear, don't guess. Call your bank directly or check your account online. Entering the wrong routing number or account number when setting up a transfer or payment can send money to the wrong place, and recovering it takes time. It's always faster to verify the numbers before you use them.

Using these numbers for transfers and payments

You'll need both your routing number and account number whenever you set up a direct deposit, automatic bill payment, or transfer money between banks. Your employer needs them to deposit your paycheck. Your utility company needs them to set up automatic payments. Any time someone else needs to send money to your account, they'll ask for these two numbers.

When you provide these numbers to someone, you're giving them the information they need to move money into your account. This is safe as long as you're providing them to a trusted source—your employer, your bank, a company you're paying. Never give these numbers to someone who calls you unexpectedly or emails you asking for account information.

What to do if your checks are damaged or old

If your checks are so old or worn that you can't read the numbers clearly, order new checks from your bank. You can usually do this through your online banking portal, by calling customer service, or by visiting a branch in person. New checks will have the same routing number and account number printed on them, so you don't need to update anything—the numbers just become readable again.

If you've lost a checkbook entirely, you don't need to replace it to find your numbers. Log into your online banking account, call your bank, or visit a branch. All three will show you the routing and account numbers without requiring you to order new checks.

Frequently Asked Questions

Do all checks from the same bank have the same routing number?

Most do, but not always. Large banks with multiple branches sometimes use different routing numbers for different regions. If you have multiple accounts at the same bank, they share the same routing number but have different account numbers. The best way to be sure is to check the specific check in front of you rather than assuming.

Can I use the routing and account number from an old check?

Yes, as long as the account is still open. The numbers don't change when you order new checks. If you closed that account, the numbers are no longer valid. If you're unsure whether the account is still active, contact your bank before using the numbers.

What if I give someone the wrong routing number?

The money will likely be rejected and returned to the sender. Banks use the routing number to identify where to send the payment, so an incorrect number means the payment goes to the wrong bank. The sender will be notified and can resubmit with the correct number. This is why it's important to double-check before sending.

Are routing and account numbers the same as my debit card number?

No. Your debit card has its own 16-digit number printed on the front. Your routing and account numbers are separate and appear only on checks and in your account information. You need the check numbers for bank transfers; you need the debit card number for purchases and online payments.

Can someone steal money using just my routing and account number?

They can attempt an unauthorized transfer or payment, but your bank has fraud protections in place. If you notice unauthorized activity, contact your bank when ready. Report it as soon as you see it—the sooner you report it, the more protection you have under federal law. Your bank will investigate and reverse fraudulent transactions.