Where to find these numbers on your check
Your check has three sets of numbers printed at the bottom in magnetic ink. From left to right, they are: your routing number (nine digits), your account number (usually ten to twelve digits), and your check number (the number of that specific check). The routing number comes first because banks read it first — it tells the banking system which bank holds your account.
The routing number identifies your specific bank or credit union. The account number identifies your specific account at that bank. Together, they form the address where money should go when someone sends you a payment or sets up a transfer. Think of the routing number as the bank's zip code and the account number as your house number on that street.
These numbers are always in the same order on every check from your account. If you order new checks, the numbers stay the same — they are tied to your account, not to the individual check.
Key Takeaways
- Your routing number (nine digits) appears first at the bottom left of your check and identifies which bank holds your account.
- Your account number (ten to twelve digits) appears in the middle and identifies your specific account within that bank.
- The check number appears last on the right and is unique to that single check.
- These numbers stay the same on every check you order from the same account.
- You need both the routing number and account number together to set up direct deposit, automatic payments, or wire transfers.
Why banks print numbers in magnetic ink
The numbers at the bottom of your check are printed in a special magnetic ink that machines can read automatically. When you deposit a check, the bank's equipment scans these numbers in seconds — much faster than a person reading them by hand. This is why the numbers must be in a specific order and format.
The magnetic ink also makes the numbers harder to alter or forge. If someone tries to change the numbers with a pen or marker, the machine will catch it because the magnetic properties won't match. This is one reason why checks are still used for large or important payments, even though they are slower than electronic transfers.
What happens if your check is damaged or worn
If the numbers at the bottom of your check are smudged, faded, or torn, you can still read them — they are printed twice on your check. Look at the bottom edge: the numbers appear once in magnetic ink (the official version the bank reads) and once in regular print just above it (for you to read). If the magnetic ink version is damaged, the bank's machine may not be able to read it, and the check could be rejected.
If you cannot read your numbers clearly, you have two options. First, you can call your bank's customer service line and ask them to read your routing and account numbers to you over the phone — they can look them up by your name and address. Second, you can order a new box of checks, which will have the same numbers printed clearly.
How to use these numbers safely
Your routing number is public information — it is the same for everyone at your bank, and you can find it on your bank's website. Your account number is private and should be treated like a password. Never share your full account number in an email, text, or over the phone unless you initiated the call to a number you know is correct.
When you write a check, you are sharing both numbers with whoever deposits it. This is normal and expected — the person needs them to process the check. But when you are setting up a payment online or over the phone, verify that you are on your bank's official website or speaking to your bank's official number before you give out your account number.
If you lose a checkbook or suspect someone has your account number, contact your bank right away. They can monitor your account for unauthorized activity and, if needed, close the account and open a new one with a different account number.
Finding these numbers if you do not have a check
If you need your routing and account numbers but do not have a check in front of you, your bank statement shows both. Look at the top or bottom of your statement — most banks print these numbers clearly. You can also log into your online banking account; most banks display these numbers in the account details or settings section.
Your bank's website usually has a routing number lookup tool. You enter your state and bank name, and it returns your routing number. This is useful if you need the routing number but do not have a check or statement handy. Your account number is unique to you, so you will need to check your statement or log in to find it.
The difference between routing numbers and SWIFT codes
If you are sending money to someone outside the United States, you may hear about a SWIFT code instead of a routing number. A SWIFT code serves the same purpose as a routing number — it identifies a bank — but it is used for international transfers. Your U.S. bank has both a routing number (for domestic transfers) and a SWIFT code (for international transfers).
For transfers within the United States, always use your routing number. For transfers to another country, ask your bank for the SWIFT code. Some banks also use an IBAN (International Bank Account Number) for international transfers, which combines bank and account information in one long number. Your bank can tell you which code to provide based on where the money is going.
Common mistakes when using these numbers
The most common mistake is reversing the routing number and account number. Remember: routing number first (left side), account number second (middle). If you reverse them, the payment will go to the wrong place or be rejected entirely.
Another mistake is confusing your routing number with your bank's main phone number or branch number. These are different. Your routing number is always nine digits and appears only at the bottom of your check. If someone asks for your "routing number" and you give them a phone number, the payment will fail.
A third mistake is assuming all checks from the same bank have the same routing number. Most do, but some large banks have multiple routing numbers for different regions or account types. If you are setting up a payment and it is rejected, double-check that you are using the routing number from your specific check, not a number you found online for your bank in general.
Frequently Asked Questions
Can someone take money from my account if they have my routing and account number?
They can attempt to, but your bank has protections in place. If someone tries to withdraw money using only your routing and account number (without your permission), you can report it as fraud. Your bank will investigate and typically refund unauthorized transfers. However, you should still treat your account number as private and report any suspicious activity when ready.
Why are there two sets of numbers at the bottom of my check?
The numbers in magnetic ink (at the very bottom) are what the bank's machines read. The numbers printed just above them in regular ink are for you to read if the magnetic ink is hard to see. They are the same numbers — just printed twice for readability and reliability.
Do I need both numbers to set up direct deposit?
Yes. Your employer or the organization sending you money needs both your routing number and account number to deposit funds into your account. One without the other will not work. Both numbers together form the complete address for your account.
What if my bank has multiple routing numbers?
Use the routing number printed on your check. That is the correct one for your specific account. If you look up your bank online and find a different routing number, it may be for a different region or account type. When in doubt, call your bank and confirm which routing number matches your account.
Can I find my routing number on my debit card?
No. Your debit card does not show your routing number. You will find it on your check, bank statement, or by logging into your online banking account. Your debit card shows a card number, but that is different from your account number and routing number.