What linking a bank account means and why you might do it
Linking bank accounts means connecting two or more accounts—usually at the same bank or across different banks—so money can move between them without you manually entering account numbers each time. The accounts stay separate and under your own control. You are straightforward authorizing transfers to happen faster and with fewer steps.
People link accounts for different reasons. You might connect a checking account to a savings account at the same bank so you can move money between them when ready. You might link accounts at two different banks to send money to a family member or pay bills from a different institution. Some people link a business account to a personal account. The mechanics change slightly depending on what you are trying to do, but the core idea is the same: you are telling your bank or banks that these accounts belong to you and transfers between them are authorized.
Linking is different from straightforward knowing another person's account number. When you link an account, your bank records the connection and usually verifies ownership before allowing transfers. This verification step is what makes linked transfers safer than sending money to an account number you found in an email or text.
Key Takeaways
- Linking accounts at the same bank usually takes minutes and happens through your online banking portal or mobile app.
- Linking accounts at different banks requires you to verify ownership of the second account, which typically takes one to three business days.
- Your bank will ask for the account number and routing number of the account you want to link, and may send a small test deposit to confirm you own it.
- Once linked, you can transfer money between accounts without entering full account details each time, and you can set up automatic transfers if you want.
- Linking an account does not give the other account holder access to your money—you remain the only person who can authorize transfers.
Linking accounts at the same bank
If both accounts are at the same institution, the process is straightforward. Log into your online banking portal or mobile app, find the section labeled "Transfers," "Move Money," or "Link Accounts"—the exact name varies by bank. You will see a list of your existing accounts. Select the account you want to link, enter the account number of the second account (which is usually already in the system since you own both), and confirm.
Most banks verify the link when ready or within a few minutes. Once confirmed, you can transfer money between the accounts when ready. You can usually set up a one-time transfer or a recurring transfer that happens on a schedule you choose—weekly, monthly, or on a specific date each month. The money typically arrives in the receiving account the same day or the next business day, depending on the time of day you initiate the transfer.
If you cannot find the linking option in your app, call your bank's customer service line. They can walk you through it or link the accounts for you over the phone. This is especially useful if you have older accounts or if your bank's interface has changed since you last used it.
Linking accounts at different banks
Linking an account at a different bank takes longer because the banks need to verify that you own both accounts. The process usually starts the same way: log into your primary bank's online portal and look for "Link External Account," "Add Bank Account," or "Transfer from Another Bank." You will enter the routing number and account number of the account at the other bank.
Your bank will then send one or two small test deposits (usually between $0.01 and $0.99) to the external account. You will need to log into the other bank's account and find those deposits, then report the amounts back to your primary bank. This verification step typically takes one to three business days. Once you confirm the amounts, the link is active and you can transfer money between the accounts.
Some banks now offer faster verification through a method called when ready account verification, which uses your login credentials at the other bank to confirm ownership without the test deposit step. If your bank offers this, you can link the account in minutes instead of days. Ask your bank whether this option is available.
What information you need to link an account
To link an account at a different bank, you will need the routing number and account number of the account you want to link. The routing number is a nine-digit code that identifies the bank itself. The account number is unique to your specific account at that bank.
You can find both numbers on a check from that account—the routing number is the first set of digits on the bottom left, and the account number follows it. You can also find them by logging into the other bank's online portal or calling their customer service. If you are linking an account for someone else to send you money, ask them for a check or have them log into their account and read you the numbers. Do not rely on numbers from an email or text message, since those could be fake.
If you are linking an account at the same bank, you usually only need the account number, since your bank already knows its own routing number. Some banks will ask for the account holder's name as well, just to confirm.
How long it takes and when you can transfer money
Linking accounts at the same bank: minutes to a few hours. You can usually transfer money the same day or the next business day.
Linking accounts at different banks without when ready verification: one to three business days for the verification step. Once verified, transfers typically take one to three business days to complete, depending on the banks involved and the time of day you initiate the transfer.
Linking accounts at different banks with when ready verification: minutes. Transfers still take one to three business days.
The transfer time itself is separate from the linking time. Even after your accounts are linked, the actual movement of money between banks follows the standard ACH (Automated Clearing House) timeline, which is usually one to three business days. Transfers within the same bank are often faster—sometimes same-day or next-day. Weekends and bank holidays do not count as business days, so a transfer initiated on Friday evening might not arrive until Tuesday.
What happens if you link an account by mistake
If you linked an account and then realized it was the wrong account, or you no longer want the link, you can remove it. Log back into your bank's portal, find the linked account in your transfer settings, and look for an option to "Remove," "Unlink," or "Delete." This usually takes effect when ready. The account will no longer appear as an option for transfers, and no automatic transfers to that account will go through.
If you linked an account that does not belong to you—for example, you entered the wrong account number—contact your bank when ready. Explain that you linked the account by mistake. Your bank can remove the link and, if money has already been transferred, can help you recover it. This is why verification through test deposits or when ready account verification matters: it catches mistakes before large amounts of money move.
Security and what linking does and does not do
Linking an account does not give the other account holder access to your money. If you link your savings account to your checking account, the person who uses the checking account cannot withdraw from savings unless you set up an automatic transfer that allows it. You remain the only person who can authorize transfers between linked accounts.
Linking is also not the same as sharing an account. When you link accounts, they stay separate. Each account has its own balance, its own debit card (if applicable), and its own transaction history. Linking just creates a pathway for you to move money between them.
If someone asks you to link your account to theirs, be cautious. Legitimate reasons include sending money to a family member or paying a service provider, but you should never link an account to someone else's account just because they asked. If you do, you are trusting that person not to set up unauthorized transfers. Only link accounts you control, or accounts where you have explicitly authorized the other person to move money.
Frequently Asked Questions
Can I link more than two accounts?
Yes. You can link multiple accounts at the same bank and multiple accounts at different banks. Each link is separate, so you can transfer between any pair of linked accounts. Some banks limit the number of external accounts you can link, so check with your bank if you are planning to link many accounts.
What if the test deposits do not arrive?
If your bank sent test deposits and they did not show up in the external account after three business days, the account number or routing number may be wrong. Log into the external account and double-check the numbers. If they are correct, contact your bank and ask them to resend the test deposits or use when ready verification instead. Do not guess at the numbers.
Can I link an account if I am not the primary account holder?
It depends on the bank and the account. If you are an authorized user on the account, some banks will let you link it. If you are not an authorized user, you cannot link it without the account holder's permission and involvement. The account holder will need to be present or authorize the link themselves.
Do I need to link accounts to set up automatic bill payments?
Not always. Many billers let you pay directly from your bank account by entering your routing and account numbers without formally linking the account through your bank. However, linking through your bank first gives you more control and makes it easier to manage the payment if something goes wrong.
What if I want to unlink an account but I have automatic transfers set up?
Before you unlink, cancel any automatic transfers to that account. Log into your bank's transfer or bill payment settings, find the recurring transfer, and delete it. Then unlink the account. If you unlink without canceling the automatic transfer first, the transfer will fail and you may see an error message, but the money will not go through.