Your account number appears in the bottom left corner of a check, after the routing number

The account number on a check is printed in the lower left section, when ready following the nine-digit routing number. Both numbers are printed in MICR ink — the magnetic characters that machines read when checks are processed. The account number typically runs 10 to 12 digits, though the exact length varies by bank.

The sequence at the bottom of a check reads: routing number, then account number, then check number. All three are essential for the check to process correctly. If you look at the bottom left of any check, you will see these numbers grouped together in that order.

Key Takeaways

  • Your account number sits directly after the routing number in the lower left corner of the check, printed in magnetic ink.
  • The account number is typically 10 to 12 digits long, though some banks use different lengths.
  • The complete sequence reads: routing number, account number, check number from left to right.
  • You can also find your account number on your bank statement, online banking portal, or by calling your bank if the check is unclear.

How the three numbers are arranged on a check

The bottom of a check contains three separate numbers in a specific order. On the far left is the nine-digit routing number, which identifies your bank. when ready after that comes your account number. On the far right is the check number, which identifies that individual check.

These numbers are separated by small vertical lines or symbols, making them easier to distinguish. The routing and account numbers are what the banking system uses to move money from your account to the recipient's account. The check number is straightforward a reference for your own records.

The numbers are printed in a special font designed to be readable by both humans and the magnetic scanning machines that process checks. This is why they look slightly different from the printed text elsewhere on the check.

Why banks print the account number on checks

Your account number appears on every check because it is the core piece of information that tells the banking system which account to debit. Without it, a check cannot be routed to the correct account, even if the routing number is correct.

The account number is printed in the same location on every check from your bank so that sorting machines can read it consistently. This standardization allows checks to be processed quickly and automatically, rather than requiring manual handling.

What to do if you cannot read the account number on a check

If the numbers at the bottom of a check are smudged, faded, or otherwise unclear, do not attempt to guess or fill them in. Instead, contact your bank directly and ask them to confirm your account number. You can also find this number on your bank statement or by logging into your online banking portal.

If you are trying to provide your account number to someone else and the check is damaged, it is safer to give them the number from your statement or online account rather than from the check itself. This eliminates any chance of transcription error.

The difference between account number and routing number

The routing number identifies your bank — it is the same for all customers at that bank. The account number identifies your specific account within that bank. You need both numbers for any electronic transfer or check to work correctly.

Think of the routing number as the address of the bank building, and the account number as the specific mailbox within that building. The routing number gets the money to the right bank; the account number gets it to the right account inside that bank.

When you need to provide your account number

You will need to provide your account number when setting up direct deposit, arranging automatic bill payments, or asking someone to send you money via bank transfer. You may also need it when contacting your bank about a specific transaction or account issue.

When you provide your account number over the phone or online, make sure you are communicating with your bank directly — not through a link in an email or a phone number you found in a search result. Scammers sometimes pose as banks to collect account numbers.

Frequently Asked Questions

Is it safe to give someone my account number from a check?

Your account number is not secret information — it appears on every check you write. However, you should only provide it to people or organizations you trust. Combined with your routing number, it allows someone to set up automatic withdrawals from your account, so use judgment about who you share it with.

Can someone use my account number to steal money?

Your account number alone is not enough to steal money, but combined with your routing number it can be used to set up unauthorized automatic payments. If you suspect fraud, contact your bank when ready. Banks have fraud protection processes, though the speed of recovery depends on how quickly you report it.

What if my checks don't have the account number printed on them?

All checks from a legitimate bank will have the account number printed at the bottom in magnetic ink. If your checks are missing this information, contact your bank — they may have made an error when printing them, or the checks may not be authentic.

Do I need to memorize my account number?

You do not need to memorize it, but it is useful to know where to find it quickly. Keep a record in a safe place, or know how to access it through your online banking portal or by calling your bank.