Your bank account number is a series of digits that identifies your account. Each account has its own unique number issued by the bank, and you’ll need to know it in order to carry out a number of financial transactions, such as transferring money between accounts or setting up direct deposit.
Here’s a closer look at what a bank account number is and how to keep yours safe.
Key Points
• A bank account number is a unique series of digits assigned to a specific account by a bank.
• These numbers can range from eight to 17 digits, depending on the bank’s system.
• The number is essential for conducting financial transactions like money transfers and setting up direct deposits.
• Unlike a debit card number, a bank account number solely identifies an account, not the card.
• Protecting your bank account number is crucial to prevent identity theft and should be done by securing personal banking documents and using secure internet connections for transactions.
How Many Digits Are in a Bank Account Number?
Each bank assigns numbers to accounts based on a proprietary system, and the numbers can be up to 17 digits long, but are typically between eight and 12 digits.
In use since the 1960s, bank account numbers are used by financial institutions to help them differentiate among the many accounts that they hold for customers. You get one when you open a bank account, and each account has a different account number, even if the account holder is the same.
For example, if you hold multiple bank accounts at a single institution, the bank account numbers keep them distinct. That might mean you have a checking and a savings account at a bank or you have two savings accounts earmarked for different purposes at a bank, for instance.
What Is a Bank Account Number Used For?
A bank account number is a unique identifying number which, along with the routing number (indicating which bank holds the account), can be used to direct funds into and out of a customer’s account.
For example, when you write a check, the account number tells the receiving bank where to draw funds from. When you sign up for direct deposit, the account number directs your paycheck to the right place.
Is a Bank Account Number the Same as a Debit Card Number?
A bank account number and a debit card number are not the same, even if they relate to the same account. The account number identifies only the account.
The debit card number is a separate, different set of digits that is used to pull funds out of your bank account. You might think of it as a code that shares information about the bank identification number (the issuer), a set of digits that indicate your bank account (but doesn’t repeat your account number), and a numeral that signifies whether your card is valid.
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How to Protect Your Bank Account Number
Your bank account number is an important piece of confidential information. What can someone do with your bank account number? Because you need it to conduct transactions with your bank, hackers and criminals looking to commit identity theft or fraud could find it useful. Keeping this number confidential is important, so here are ways to protect it – and your security.
• Keep paper checks, which have your bank account and routing number printed on them, in a secure place. Shred used or void ones.
• If you are doing an online or mobile banking transaction involving your bank account number, be sure you have a strong password and are using a private and secure internet connection. Avoid doing banking while using a public connection at, say, a hotel or cafe.
• Only enter your bank account number on secure websites, meaning ones that start with “https” and may show the little lock icon.
• Monitor your checking account and other accounts carefully, and keep an eye on your bank statements. Look out for purchases or money transfers that you don’t recognize or that you didn’t make, and alert your bank about any unusual activity.
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The Takeaway
Your bank account number is akin to a fingerprint: uniquely yours. It’s a valuable piece of information you’ll need for any number of banking transactions. It’s also information you should protect as best you can by carefully disposing of paper checks and statements and practicing secure banking online.
Interested in opening an online bank account? When you sign up for a SoFi Checking and Savings account with direct deposit, you’ll get a competitive annual percentage yield (APY), pay zero account fees, and enjoy an array of rewards, such as access to the Allpoint Network of 55,000+ fee-free ATMs globally. Qualifying accounts can even access their paycheck up to two days early.
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SoFi Checking and Savings is offered through SoFi Bank, N.A. Member FDIC. The SoFi® Bank Debit Mastercard® is issued by SoFi Bank, N.A., pursuant to license by Mastercard International Incorporated and can be used everywhere Mastercard is accepted. Mastercard is a registered trademark, and the circles design is a trademark of Mastercard International Incorporated.
Annual percentage yield (APY) is variable and subject to change at any time. Rates are current as of 11/12/25. There is no minimum balance requirement. Fees may reduce earnings. Additional rates and information can be found at https://www.sofi.com/legal/banking-rate-sheet
Eligible Direct Deposit means a recurring deposit of regular income to an account holder’s SoFi Checking or Savings account, including payroll, pension, or government benefit payments (e.g., Social Security), made by the account holder’s employer, payroll or benefits provider or government agency (“Eligible Direct Deposit”) via the Automated Clearing House (“ACH”) Network every 31 calendar days.
Although we do our best to recognize all Eligible Direct Deposits, a small number of employers, payroll providers, benefits providers, or government agencies do not designate payments as direct deposit. To ensure you're earning the APY for account holders with Eligible Direct Deposit, we encourage you to check your APY Details page the day after your Eligible Direct Deposit posts to your SoFi account. If your APY is not showing as the APY for account holders with Eligible Direct Deposit, contact us at 855-456-7634 with the details of your Eligible Direct Deposit. As long as SoFi Bank can validate those details, you will start earning the APY for account holders with Eligible Direct Deposit from the date you contact SoFi for the next 31 calendar days. You will also be eligible for the APY for account holders with Eligible Direct Deposit on future Eligible Direct Deposits, as long as SoFi Bank can validate them.
Deposits that are not from an employer, payroll, or benefits provider or government agency, including but not limited to check deposits, peer-to-peer transfers (e.g., transfers from PayPal, Venmo, Wise, etc.), merchant transactions (e.g., transactions from PayPal, Stripe, Square, etc.), and bank ACH funds transfers and wire transfers from external accounts, or are non-recurring in nature (e.g., IRS tax refunds), do not constitute Eligible Direct Deposit activity. There is no minimum Eligible Direct Deposit amount required to qualify for the stated interest rate. SoFi Bank shall, in its sole discretion, assess each account holder's Eligible Direct Deposit activity to determine the applicability of rates and may request additional documentation for verification of eligibility.
See additional details at https://www.sofi.com/legal/banking-rate-sheet.
Financial Tips & Strategies: The tips provided on this website are of a general nature and do not take into account your specific objectives, financial situation, and needs. You should always consider their appropriateness given your own circumstances.
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