The account number is the second set of digits on the bottom of your check
Your account number appears in the lower left portion of any check you write. It sits between two other numbers: the routing number on the far left, and the check number on the far right. The account number is typically 10 to 12 digits long, though the exact length depends on your bank.
On a standard check, these three numbers are printed in MICR format — a machine-readable code that banks use to process checks electronically. They appear in this order from left to right: routing number, account number, check number. All three are printed in the same small font at the bottom of the check.
If you need your account number for a tax refund, insurance refund, business payment, or any other deposit, the check itself is the fastest place to find it. You do not need to call your bank or log into online banking.
Key Takeaways
- Your account number is the middle set of digits at the bottom of your check, between the routing number and check number.
- Account numbers are typically 10 to 12 digits long, but the length varies by bank.
- The account number appears in MICR format — the small machine-readable print at the bottom left of the check.
- If you cannot read the MICR line clearly, your bank's website or customer service can provide your account number in seconds.
How to read the MICR line on your check
The MICR line is printed in a special font designed for machines to read, but you can read it too. Look at the bottom left of your check. You will see three separate groups of numbers, each separated by a small vertical line or symbol.
The first group is your routing number — usually nine digits. The second group is your account number — the one you need. The third group is your check number — the number printed in the upper right corner of the check as well.
Write down only the middle set of digits. Do not include the routing number or check number. If the print is faded or hard to read, move to the next check in your book — all checks from the same account have the same account number.
Where account numbers appear on different check types
Personal checks, business checks, and cashier's checks all display the account number in the same location: the MICR line at the bottom left. The format is identical across all check types from the same bank.
If you have a starter check book with only a few checks, the account number will still be on every check. If you have duplicate checks (carbonless copies), both the original and the copy show the same account number in the MICR line.
Blank checks or counter checks issued by your bank in an emergency also contain the MICR line with your routing and account numbers. The only exception is a check that has been damaged or printed incorrectly — in that case, contact your bank directly.
What to do if you cannot read the account number clearly
If the MICR line is faded, smudged, or printed too lightly to read, you have two fast options. First, check another check from the same book — the account number is identical on all checks from your account, so a newer or older check may be easier to read.
Second, contact your bank directly. Call the number on the back of your debit card or the front of your bank statement. Tell them you need your account number for a deposit or refund. They will provide it in under a minute. You can also log into your online banking portal — most banks display your account number prominently on the account summary page.
Do not guess at the digits or try to reconstruct the number from memory. Banks and refund programs need the exact account number to deposit money into the correct account. A single wrong digit will send the money to the wrong place, and recovering it takes weeks.
Account numbers and refund deposits
When you provide a check for a tax refund, insurance refund, or business refund, the receiving organization uses your account number to deposit the money directly into your bank account. This is called direct deposit or ACH transfer.
The IRS, state tax agencies, insurance companies, and most businesses now prefer direct deposit because it is faster and more reliable than mailing a check. A direct deposit typically arrives within one to three business days after the organization processes your request, compared to five to ten days for a mailed check.
Some organizations will ask you to write down your account number separately on a form, rather than submitting the check itself. In that case, copy the number exactly as it appears on the check. Double-check your work before submitting — one transposed digit can delay your refund by weeks while the bank sorts out where the money went.
Protecting your account number
Your account number, combined with your routing number, is enough information for someone to set up an unauthorized direct deposit or ACH withdrawal from your account. Treat it with the same care you would give your debit card number.
When you submit a check or account information to receive a refund, use only official channels. For tax refunds, submit information directly through the IRS website or your state tax agency. For insurance refunds, contact the insurance company directly using the phone number on your policy or their official website.
Do not share your account number with anyone who contacts you first — whether by phone, email, or text — claiming they need it to process a refund. Legitimate refund organizations will never ask you to provide account information unsolicited.
Frequently Asked Questions
Is the account number the same as the check number?
No. The check number appears in the upper right corner of the check and also at the bottom right in the MICR line. Your account number is in the middle of the MICR line. Every check you write has a different check number, but your account number stays the same for the life of the account.
Can I use a deposit slip instead of a check to find my account number?
Yes. Deposit slips printed by your bank show your account number at the bottom in MICR format, just like a check. If you have a deposit slip but no checks, it will have the same account number and routing number.
What if my check has no MICR line or the numbers are completely missing?
Contact your bank immediately. A check without a MICR line is defective and cannot be processed. Your bank can issue replacement checks or provide your account number over the phone so you can submit it directly to the organization processing your refund.
Do I need both the routing number and account number for a direct deposit?
Yes. Most refund programs and direct deposit forms ask for both numbers. The routing number identifies your bank; the account number identifies your specific account within that bank. Both are necessary for the money to reach the correct place.
Can someone steal money from my account if they have my account number and routing number?
They can attempt to, but your bank has fraud protections in place. If you notice an unauthorized withdrawal, report it to your bank immediately. Federal law limits your liability for unauthorized ACH transfers if you report them within 60 days.