The three numbers are printed at the bottom left of every check

Your routing number, account number, and check number all appear in the magnetic ink character recognition (MICR) line—the row of numbers printed in a special font at the bottom left of your check. You do not need special tools or software to read them. The routing number comes first (nine digits), your account number follows (usually 10 to 12 digits), and the check number appears on the right side of that same line.

The order matters because banks and payment processors read them in that sequence. If you are setting up a direct deposit, paying a bill by check number, or troubleshooting a payment that did not go through, you will need to identify which number is which.

Key Takeaways

  • The routing number (nine digits) appears first in the MICR line at the bottom left of your check and identifies your bank or credit union.
  • Your account number (10 to 12 digits) comes when ready after the routing number in the same line and identifies your specific account.
  • The check number appears on the right side of the MICR line and also in the top right corner of the check for quick reference.
  • If the MICR line is damaged or unreadable, you can find your routing number on your bank's website or by calling the customer service number on the back of your debit card.

How to read the MICR line on your check

Hold the check so the bottom left corner faces you. You will see a line of numbers printed in a distinctive blocky font that looks different from regular type. This is the MICR line. Read from left to right: the first nine digits are your routing number, the next 10 to 12 digits are your account number, and the final set of digits on the right (usually four digits) is your check number.

The numbers are separated by small vertical lines or symbols that help sorting machines read them. These symbols are not part of any number—they are just dividers. If you are writing down the numbers by hand, skip the symbols and record only the digits.

Some checks also print the routing number and account number in human-readable form above or below the MICR line, though this is less common. If your check has this printed version, you can use it as a backup to verify what you read in the MICR line.

What each number tells you and why you need it

Your routing number identifies the specific bank or credit union branch where your account is held. It is the same for every check you order from that institution. Banks use routing numbers to direct payments to the correct financial institution during transfers and direct deposits. If you are receiving a paycheck by direct deposit or setting up automatic bill payments, you will need this number.

Your account number is unique to you and identifies your specific checking account within that bank. It stays the same throughout the life of the account. This number appears on statements, deposit slips, and any correspondence from your bank. You will need it whenever you are linking your account to another service—a payroll system, a bill payment platform, or a peer-to-peer payment app.

Your check number is a sequential identifier for that individual check. It helps you track which check you wrote, to whom, and when. The check number also appears in the top right corner of the check in larger, easier-to-read digits. Banks use it to match cleared checks to your account statement.

Finding your routing number if the check is damaged or unreadable

If the MICR line on your check is smudged, faded, or torn, you do not have to order new checks to find your routing number. Log into your bank's website or mobile app and look for account information or settings. Most banks display your routing number in the account details section, sometimes labeled "bank routing number" or "ABA number" (ABA stands for American Bankers Association, the organization that assigns routing numbers).

You can also call the customer service number on the back of your debit card or the number listed on your bank statement. A representative can read your routing number to you over the phone in under a minute. Some banks also print the routing number on deposit slips or on statements, so check those documents if you have them on hand.

If you have moved or switched banks, make sure you are looking at a check from your current account. Routing numbers are institution-specific, so a check from an old account at a different bank will have a different routing number than your current account, even if it is in your name.

Common mistakes when copying routing and account numbers

The most frequent error is confusing the check number with the account number. The check number is short (usually four digits) and appears on the right side of the MICR line and in the top right corner of the check. Your account number is longer (10 to 12 digits) and sits in the middle of the MICR line. If you write down a four-digit number when you need a 10-digit number, the payment or deposit will fail.

Another common mistake is transposing digits—accidentally swapping two numbers or writing them in the wrong order. This happens most often when copying by hand under time pressure. If you are setting up direct deposit or a bill payment and the system rejects your information, double-check that you copied each digit in the correct sequence. Reading the numbers aloud as you write them down can help catch errors.

Some people also assume that all checks from the same bank have the same routing number. This is usually true, but not always. Larger banks sometimes use different routing numbers for different regions or account types. If a payment fails and you have already verified your account number, try looking up your specific branch's routing number on your bank's website rather than using a number you found online for the bank in general.

When you need routing and account numbers versus when you do not

You will need both numbers when setting up direct deposit (payroll, tax refunds, benefits), arranging automatic bill payments from your checking account, transferring money between banks, or providing banking information to an employer or government agency. In these cases, the receiving institution needs to know both which bank holds your account and which account within that bank is yours.

You do not need these numbers when paying someone with a physical check—the recipient's bank will read the MICR line automatically when they deposit it. You also do not need them for debit card transactions, online shopping, or wire transfers (which use a different process). If you are paying a bill online through your bank's bill pay system, you may only need your account number, not your routing number, because your bank already knows its own routing number.

When in doubt, the institution asking for the information will tell you which numbers they need. If they ask for "routing and account number," provide both. If they ask only for "account number," do not volunteer the routing number unless they specifically request it.

Frequently Asked Questions

Is my routing number the same on every check I order?

Yes. Your routing number is tied to your bank and branch, not to the individual check. Every check you order from the same account will have the same routing number printed on it. If you switch banks or open a new account at a different institution, your new checks will have a different routing number.

Can someone use my routing and account number to steal money from my account?

Your routing and account number alone are not enough to withdraw money or make unauthorized charges. A thief would also need to initiate a transaction through a legitimate channel—a bank, an employer's payroll system, or a bill payment platform—and those systems have fraud detection built in. If you are concerned about unauthorized activity, contact your bank when ready and ask them to monitor your account for suspicious transfers.

What if the numbers on my check do not match what my bank's website shows?

This usually means you copied a digit incorrectly or you are looking at a check from a different account or bank. Compare the check to your most recent bank statement or log into your online banking to verify the correct numbers. If the numbers genuinely do not match and you are certain you are looking at the right account, contact your bank—it could indicate a printing error on the check stock.

Do I need the check number for direct deposit?

No. Direct deposit requires only your routing number and account number. The check number is specific to that individual check and is not used for direct deposit or automatic transfers. You can ignore the check number when setting up payroll or benefits deposits.

Where else can I find my account number besides a check?

Your account number appears on your bank statement, in your online banking portal, on deposit slips, and on any correspondence from your bank. You can also call customer service and ask them to read it to you. If you do not have a check or access to online banking, a phone call to your bank is the fastest way to get the number.