Your account number appears in the bottom right section of a check, after the routing number
The account number on a check is printed in the lower right corner, immediately following the nine-digit routing number. Both numbers are printed in magnetic ink character recognition (MICR) format — the machine-readable characters at the bottom of the check that look slightly different from regular printed text. The account number typically runs 10 to 12 digits long, though the exact length varies by bank.
The order matters: routing number comes first (left to right), then account number. A check from a Wells Fargo account, for example, might show routing number 121000248 followed by account number 1234567890. These two numbers together tell the banking system where to pull the money from and whose account it belongs to.
Not every check displays the account number in the same visual position because different banks print checks differently. Some banks print it larger and more prominent; others tuck it smaller. But the MICR line at the bottom is always the authoritative location — that is what the check-processing machines read, not the numbers printed elsewhere on the check.
Key Takeaways
- The account number sits in the bottom right of a check, printed in magnetic ink characters alongside the routing number.
- Routing number comes first, then account number — the order is fixed and the machines read them in that sequence.
- Account numbers are typically 10 to 12 digits, but length varies by bank and account type.
- The MICR line at the bottom is the official location; printed account numbers elsewhere on the check are for reference only.
- You can also find your account number on your bank statement, online banking portal, or by calling your bank.
Why banks print the account number on checks
The account number on a check serves two purposes. First, it is part of the automated clearing system that processes checks electronically. When you deposit or cash a check, the bank's machines scan the MICR line and use the account number to debit the correct account. Without it, the banking system would not know which account to pull funds from.
Second, the account number is printed there for your own reference. If you need to verify which account a check is drawn from, you can read it directly off the check without logging into your bank or calling customer service. This is especially useful if you have multiple accounts at the same bank.
How to read the MICR line correctly
The MICR line contains more than just the routing and account numbers. Reading left to right, you will see: a check symbol, the routing number (9 digits), the account number (typically 10 to 12 digits), and the check number (usually 4 digits on the right edge). Small symbols separate each section.
The routing number always comes first and is always 9 digits. After that, the account number begins. If you are unsure where one ends and the other begins, count: nine digits for routing, then the account number starts. The account number runs until you reach the check number on the far right.
Some checks also print the account number in regular text elsewhere — often in the upper right corner or near the memo line — for easy human reading. But that printed version is just a convenience. The MICR line at the bottom is what the banking system actually uses.
Account number location on different check types
Personal checks, business checks, and cashier's checks all follow the same MICR format. The routing and account numbers appear in the same position on the bottom of every check type. The difference is in what other information is printed: a personal check has your name and address, a business check has the company name, and a cashier's check has the bank's name and the amount printed by the bank itself.
Starter checks (temporary checks issued when you open an account) also have the account number in the standard MICR location. Duplicate checks — the carbon copies you keep for your records — show the same account number as the original check, since they are part of the same check stock.
What to do if you cannot find your account number on a check
If your check stock is old, faded, or damaged, the MICR line may be hard to read. In that case, your account number is also printed on your bank statement, visible in your online banking portal, or available by calling your bank's customer service line. You do not need to hunt through a check to find it.
If you have lost all your checks and need the account number immediately, log into your bank's website or mobile app — the account number is usually displayed on the account summary page. If you do not have online access set up, call your bank with your identification ready, and they will provide it over the phone.
Common mistakes when reading the account number
The most common error is confusing the routing number with the account number. Remember: routing number is always 9 digits and identifies the bank. Account number is longer (usually 10 to 12 digits) and identifies your specific account at that bank. If you count the digits and get 9, you are looking at the routing number, not the account number.
Another mistake is reading the check number as part of the account number. The check number appears on the far right of the MICR line and is usually only 4 digits. It is separate from the account number and changes with each check in your book. If you are copying the account number, stop before you reach the check number.
Some people also mistake printed account numbers elsewhere on the check (like in the upper right) for the official version. The MICR line is always the authoritative source. If the numbers do not match, the MICR line is correct.
Frequently Asked Questions
Is the account number on a check the same as my online banking account number?
Yes. The account number printed on your check is the same number you use to log into online banking and the same number your bank uses internally. It is a single identifier for your account.
Can someone use my account number from a check to steal money?
An account number alone is not enough to withdraw funds. A thief would also need your routing number (which is public information tied to your bank, not your account) and authorization to move the money. Checks are designed so that only the person who writes the check authorizes the withdrawal. Sharing your account number is generally safe, though you should still be cautious about who you give it to.
What if my check does not have a MICR line or the numbers are not printed?
This is rare but can happen with damaged checks or certain specialty check types. Contact your bank and request a replacement check stock. Do not attempt to write the account number on a check by hand — the banking system relies on the machine-readable MICR format.
Does every check from my account have the same account number?
Yes. Every check in your checkbook has the same account number printed on it. The only number that changes from check to check is the check number itself, which appears on the far right of the MICR line and also in the upper right corner.
Can I use the account number from an old check?
Yes, as long as the account is still open. The account number does not change when you order new checks. If you closed the account, that account number is no longer active, and you would need the account number from your current account instead.