The MICR account number is the string of digits printed at the bottom left of your checks, separate from your routing number and account number
The MICR stands for Magnetic Ink Character Recognition. It is a nine-digit code that identifies your specific bank branch and account. Banks use it to sort and process checks automatically — the MICR line tells the machine which bank issued the check, which branch it came from, and which account to pull the money from.
You will see it printed in magnetic ink at the bottom of every check you receive from your bank. It looks like a series of numbers separated by small symbols that resemble colons or dashes. The MICR code appears to the left of your account number and routing number on the check itself.
The MICR account number is not the same as your account number. Your account number is usually 10 to 12 digits and identifies your individual account. The MICR code is shorter and serves a different purpose — it is read by check-processing machines, not by people.
Key Takeaways
- The MICR account number is a nine-digit code printed in magnetic ink at the bottom left of your checks.
- Banks and check processors use MICR codes to automatically sort and route checks to the correct account during processing.
- You can find your MICR account number on any check your bank issued to you, or by calling your bank directly.
- The MICR code is different from your routing number and account number, though all three appear on your check.
- You may need your MICR account number when setting up direct deposits, automatic payments, or wire transfers with some financial institutions.
Where to find your MICR account number
The easiest place to find your MICR account number is on a check. Look at the bottom left corner of the check. You will see a series of numbers printed in a special magnetic ink font. The MICR code is the first set of numbers you encounter when reading from left to right.
If you do not have a check handy, call your bank's customer service line. Have your account number and routing number ready. The representative can read your MICR code to you over the phone, or they can direct you to find it in your online banking portal. Some banks display it under account details or check information.
You can also log into your online banking account and look for a section labeled "Account Information" or "Check Details." Some banks print the MICR code there alongside your routing and account numbers.
Why banks use MICR codes instead of account numbers
Check-processing machines read MICR codes faster and more accurately than they read printed account numbers. The magnetic ink and special font make the code readable even if the check is worn, faded, or slightly damaged. This matters because millions of checks move through the banking system every day, and speed and accuracy are critical.
The MICR code also contains routing information built into it. The first four digits identify the Federal Reserve district and the bank. The next four digits identify the specific branch. This structure allows sorting machines to route checks to the right place without having to look up the routing number separately.
Account numbers, by contrast, are designed for people to read and type. They vary in length from bank to bank and do not contain routing information. Using MICR codes for machine processing and account numbers for human transactions keeps both systems efficient.
MICR codes and direct deposits or automatic payments
When you set up a direct deposit or automatic payment, you usually provide your routing number and account number — not your MICR code. Most banks and employers have moved away from requiring MICR codes for these transactions because the routing and account numbers are sufficient.
However, some older banking systems or smaller financial institutions may still ask for your MICR code when you set up automatic transfers. If that happens, you now know where to find it. Having it on hand can speed up the process.
For wire transfers, ACH transfers, and most bill-pay services, your routing number and account number are what you need. The MICR code is primarily used for check processing, which is becoming less common as digital payments grow.
How MICR codes differ from routing and account numbers
| Code Type | Length | Purpose | Who Reads It |
|---|---|---|---|
| MICR account number | 9 digits | Check processing and sorting | Automated machines |
| Routing number | 9 digits | Identifies your bank and branch for transfers | Banks and ACH processors |
| Account number | Varies (usually 10–12 digits) | Identifies your specific account | Banks and people |
All three numbers appear on your check, but they serve different functions. The routing number tells the system which bank to send money to. The account number tells it which account within that bank. The MICR code combines both pieces of information in a format that machines can read quickly.
What happens if you give someone your MICR code
Your MICR code is printed on every check you write, so it is not secret information. Anyone who has seen one of your checks already knows it. Sharing your MICR code alone does not put your account at risk because it does not include enough information to withdraw money or make transfers.
To actually move money from your account, someone would need your account number and routing number, plus authorization from you or your bank. The MICR code is just one piece of the puzzle. That said, you should still protect your checks and not leave them lying around where strangers can see them.
MICR codes and check fraud
Fraudsters sometimes try to alter MICR codes on checks to redirect payments to a different account. This is called check washing or check alteration. The magnetic ink used in MICR codes is harder to forge than regular ink, which is one reason banks use it.
If you write checks, use a pen that does not smudge or fade, and store your checks securely. If you receive a check, look at the MICR line to make sure it looks clean and properly printed. If it appears altered or unclear, contact the issuer before depositing it.
Frequently Asked Questions
Is my MICR account number the same as my account number?
No. Your account number is usually 10 to 12 digits and identifies your specific account. Your MICR account number is 9 digits and is used by machines to process checks. Both appear on your check, but they serve different purposes.
Do I need my MICR code to set up direct deposit?
Usually not. Most employers and banks only ask for your routing number and account number to set up direct deposit. If a bank does ask for your MICR code, you can find it on any check or by calling customer service.
Can someone steal money from my account if they have my MICR code?
No. The MICR code alone is not enough to access your account or move money. A thief would also need your account number, routing number, and authorization from you or your bank. Your MICR code is printed on every check you write, so it is not confidential.
What if I cannot find the MICR code on my check?
The MICR code is always at the bottom left of a check in magnetic ink. If you cannot read it clearly, the check may be damaged or counterfeit. Call your bank with your account number, and they can provide your MICR code over the phone.
Will I still need my MICR code if I stop writing checks?
Probably not. As check usage declines, MICR codes matter less for most people. If you use digital payments, direct deposit, and bill pay, you will rarely encounter a situation where you need your MICR code.