Where to find both numbers on your check
Your routing number and account number are printed at the bottom of every check you write. The routing number comes first on the left, the account number comes second in the middle, and your check number appears on the right. All three are printed in MICR ink — the magnetic characters that banks read automatically.
The routing number is always nine digits. The account number varies in length but is usually between 10 and 12 digits. Both numbers are also printed in regular ink above the magnetic line, though the magnetic versions are what matter for bank processing.
If you are waiting for a refund and the organization asks for these numbers, they need them to deposit money directly into your account instead of mailing a check. This is how tax refunds, insurance payouts, and business refunds reach you faster — sometimes in 1 to 3 business days instead of 5 to 10.
Key Takeaways
- The routing number (nine digits) appears on the left side of the MICR line at the bottom of your check.
- Your account number appears in the middle of the MICR line and is usually 10 to 12 digits long.
- Both numbers are printed in regular ink above the magnetic line if you need to read them by eye.
- Refunds deposited using these numbers typically arrive in 1 to 3 business days, faster than mailed checks.
Reading the MICR line step by step
The bottom of your check has a line of numbers that looks like this: 121000248 1234567890 0123. The first group of nine digits is your routing number. Do not confuse it with your bank's main routing number — this one is specific to the branch or processing center where your account is held.
The second group is your account number. It may have leading zeros that matter — if your account number is 0001234567, you must include those zeros when you give it to someone. Leaving them out will cause the deposit to fail or go to the wrong account.
The third group on the right is your check number, which you do not need to provide for refunds. Some checks print the account number twice — once in the MICR line and once in regular type near the top right. Both are the same number.
Why banks need both numbers for direct deposit
The routing number tells the sending bank which bank or credit union holds your account. The account number tells that bank which specific account within your institution receives the money. Together, they form a complete address for your money.
When you provide only one, the deposit cannot go through. A tax refund processor or insurance company cannot guess your account number from your routing number alone, and they cannot find your bank from your account number alone. Both are required.
This is why refund forms always ask for both. If you see a form asking for only one, it is incomplete and the deposit will likely fail or be delayed while the organization contacts you for the missing information.
Finding these numbers if you do not have a check
If you do not have checks or prefer not to use them, you can find your routing and account numbers through your bank's website or mobile app. Log in, look for account details or settings, and both numbers are usually listed there. Some banks call it "account information" or "bank details."
You can also call your bank's customer service line — the number is on your debit card or bank statement — and ask for your routing number and account number. Have your account number or card ready to verify your identity. They will give you both numbers over the phone.
Your bank statement also shows both numbers. Look at the top or bottom of the first page, where your account details are printed. The routing number may be labeled as "ABA number" or "transit number" on older statements.
What to do if the numbers on your check look wrong
If the MICR line at the bottom of your check is smudged, faded, or hard to read, do not guess. Use your bank's website or call customer service instead. A wrong routing number will send your refund to the wrong bank entirely, and a wrong account number will send it to someone else's account at your bank.
If you recently opened your account or switched banks, make sure you are using the routing number for your current bank, not your old one. Routing numbers change when you move accounts, and using an old number will delay or fail the deposit.
If you are unsure whether the numbers you are reading are correct, verify them with your bank before giving them to anyone. It takes two minutes and prevents a refund from going to the wrong place.
How refunds use these numbers to reach your account
When you provide your routing and account numbers to a tax agency, insurance company, or business, they send your refund through the ACH network — an automated system that moves money between bank accounts. The routing number directs the payment to your bank. The account number directs it to your specific account within that bank.
The ACH system processes most refunds overnight, which is why direct deposit is faster than a mailed check. A check takes 5 to 10 business days to arrive and clear. A direct deposit usually clears in 1 to 3 business days, sometimes the same day.
Once the money arrives in your account, it is yours — the bank cannot reverse it the way it can with a mailed check that bounces. This is why organizations prefer direct deposit: it is faster, cheaper, and more reliable.
Protecting your routing and account numbers
Your routing number is public information — it is printed on every check you write and is not secret. Your account number is more sensitive because it identifies your specific account, but it is not as sensitive as your Social Security number or PIN.
Only provide these numbers to organizations you trust and that have a legitimate reason to deposit money into your account. Legitimate reasons include tax refunds, insurance payouts, business refunds, payroll, and government benefits. Do not provide them to anyone who calls you unsolicited or who asks for them via email or text.
If you are concerned about a request, call the organization directly using a phone number from their official website or a bill you received. Do not use a phone number from an email or text message, which could be fraudulent.
Frequently Asked Questions
Can someone steal money from my account if they have my routing and account numbers?
They can attempt to, but banks have fraud protections. If someone tries to withdraw money using only your routing and account numbers, your bank can dispute the transaction if you report it quickly. Report unauthorized withdrawals within 60 days of your statement to have the best chance of recovery. Do not delay.
Are the routing and account numbers the same on every check from my account?
Yes. Every check from the same account has the same routing number and account number printed on it. The only number that changes is the check number. You can use any check from your account to find these numbers.
What if my refund does not arrive after I provided my routing and account numbers?
Wait 3 to 5 business days first — direct deposits sometimes take longer than expected. If it has been longer than that, contact the organization that sent the refund and ask them to confirm the routing and account numbers they received. Ask them to check their records for any error messages. If the numbers were wrong, they may need to resubmit the deposit.
Do I need to provide my routing number if I am mailing a check instead of using direct deposit?
No. Mailed checks do not require routing or account numbers — the bank reads them from the MICR line automatically when the check arrives. You only need to provide these numbers when someone is depositing money electronically into your account.
Is my routing number different from my bank's main routing number?
Sometimes. Large banks have multiple routing numbers for different branches or processing centers. The routing number on your check is the one tied to your specific account. Use the number from your check when you are providing it for a refund, not a number you find on your bank's website, which may be a general routing number.