What happens when you link a bank account to Coinbase
When you link a bank account to Coinbase, you create a direct connection between your bank and the Coinbase platform. Coinbase can then initiate transfers from your bank account to buy cryptocurrency, or receive transfers from Coinbase when you sell and want the money back in your bank. The connection uses Plaid, a third-party service that acts as the intermediary—your bank login credentials go to Plaid, not directly to Coinbase.
The actual money does not move through Plaid. Plaid only verifies that the account exists and belongs to you. Once verified, Coinbase and your bank communicate directly through the ACH network (Automated Clearing House), which is the same system that handles direct deposits and bill payments. ACH transfers typically take one to five business days, depending on your bank and the direction of the transfer.
You will need to complete two verification steps: first, Plaid confirms your account ownership by checking your login; second, your bank may require you to confirm small test deposits (usually under $1 each) that Coinbase sends to your account. Only after both steps are complete can you move money.
Key Takeaways
- Linking uses Plaid to verify your account, but money moves through the ACH network directly between your bank and Coinbase.
- You will need your online banking login and password during the Plaid verification step, but Coinbase never sees those credentials.
- Your bank may send two small test deposits that you must confirm in Coinbase before transfers can begin.
- ACH transfers take one to five business days, and weekend or holiday transfers may take longer.
- Linking a bank account is different from linking a debit or credit card—bank accounts allow larger transfers and lower fees.
Step-by-step: connecting your bank account through Plaid
Start in Coinbase on the web or mobile app. Go to Settings (the gear icon), then Payment Methods, then select Add a Payment Method. Choose Bank Account from the list—do not choose debit card or credit card, as those are different connections.
Coinbase will ask you to select your bank from a list or search for it by name. Once you find your bank, you will be taken to a Plaid login screen that looks like your bank's website. Enter your online banking username and password here. Plaid will verify the account and show you a list of accounts linked to that login (checking, savings, money market, etc.). Select the account you want to use with Coinbase.
After you select the account, you will return to Coinbase and see a confirmation that the account has been added. At this point, the account is linked but not yet verified for transfers. Coinbase will tell you to wait for two small deposits from your bank—these usually arrive within one to two business days.
Confirming the test deposits and completing verification
When the two test deposits arrive in your bank account, log back into Coinbase and go to Settings > Payment Methods. Find the bank account you just linked and select it. Coinbase will show you a field asking for the amounts of the two deposits. Enter both amounts exactly as they appear in your bank statement.
Once you confirm the amounts correctly, Coinbase will mark the account as verified. You can now transfer money in both directions: from your bank to Coinbase to buy cryptocurrency, or from Coinbase back to your bank to cash out. The first transfer may take longer than subsequent ones—some banks hold the first ACH transfer for an extra day as a security measure.
If you do not see the test deposits after three business days, check that you selected the correct account during Plaid login. If you selected a savings account but the deposits went to checking, you will need to unlink and start over. You can remove the account from Payment Methods and try again with the correct account.
Limits on how much you can transfer
Coinbase sets daily and weekly transfer limits that depend on your account age, verification level, and payment history. New accounts typically start with lower limits—often $500 to $1,000 per day for bank transfers. As your account ages and you complete successful transfers, these limits usually increase.
Your bank may also set its own limits on ACH transfers. Some banks cap outgoing ACH transfers at $10,000 per day or $25,000 per month. Check your bank's online banking settings or call their customer service line to see what limits explore to your account. If you need to transfer more than your limit allows, you will have to wait until the next day or week, depending on whether the limit resets daily or weekly.
Coinbase will show you your current limits in the Payment Methods section. If you hit a limit, you will see an error message when you try to transfer, and the transfer will not go through.
Why the connection might fail and how to fix it
The most common reason a bank account fails to link is an incorrect Plaid login. If your online banking password has changed since you last logged in, or if you use a security key or biometric login, Plaid may not be able to verify the account. Try logging into your bank's website directly first to make sure your credentials work, then return to Coinbase and try linking again.
Some banks do not work with Plaid at all, or only work with certain versions of Plaid. If you search for your bank and it does not appear, or if Plaid says it cannot connect, your bank may not support this integration. In that case, you can link a debit card instead, though debit card transfers usually have lower limits and higher fees than bank account transfers.
If the test deposits do not arrive after three business days, the account may be linked to the wrong bank branch or account type. Unlink the account, wait one business day, and try again. Make sure you are selecting the correct checking or savings account during the Plaid login—if you have multiple accounts, Plaid will list all of them.
Security: what Coinbase and Plaid can see
Plaid sees your online banking login credentials, but Coinbase does not. Plaid uses your credentials only to verify that the account exists and that you own it. Plaid does not store your password after verification is complete, and it cannot initiate transfers on your behalf—only your bank and Coinbase can move money.
Coinbase sees your account number, routing number, and account holder name. It does not see your password, your full transaction history, or your account balance. Once the account is verified, Coinbase uses the account number and routing number to send ACH transfer requests to your bank, just like a bill payment or direct deposit would.
If you are concerned about security, you can unlink the account at any time from Settings > Payment Methods. Unlinking does not affect your bank account or any transfers already in progress—it only removes Coinbase's ability to initiate new transfers.
Frequently Asked Questions
Can I link multiple bank accounts to the same Coinbase account?
Yes. Go to Payment Methods and select Add a Payment Method each time you want to add a new account. You can link checking accounts, savings accounts, or accounts from different banks. Each account will have its own verification process with test deposits.
What if my bank uses two-factor authentication or a security key?
Plaid can handle two-factor authentication if your bank sends a code by text or email. If your bank requires a security key or biometric login, Plaid may not be able to complete the connection. Try linking through the Coinbase mobile app instead, as some banks allow mobile authentication to work differently than web authentication.
How long does it take to transfer money after the account is verified?
ACH transfers typically take one to five business days. Transfers initiated on a weekend or holiday may not begin processing until the next business day. Some banks hold the first transfer for an extra day. Coinbase will show you an estimated arrival date when you initiate the transfer.
Can I link a business bank account or joint account?
You can link a joint account if your name is on it and you have online banking access. Business accounts may work depending on your bank and the type of business account. If Plaid cannot verify a business account, contact your bank to confirm that the account supports third-party connections.
What happens if I unlink my bank account?
Unlinking removes Coinbase's ability to initiate new transfers, but it does not affect transfers already in progress or your bank account itself. Your bank will continue to process any transfers that were already submitted. You can relink the same account later by going through the verification process again.