What you can and cannot do with a checking account number alone
A checking account number by itself is not enough to send money to someone. You need both the account number and the routing number — and even then, only certain methods will work. A routing number identifies the bank; the account number identifies the specific account within that bank. Without both, the money has nowhere to go.
The methods that accept account and routing numbers are limited: ACH transfers (the electronic system banks use to move money between accounts), wire transfers through your bank, and bill pay services. You cannot send money using only an account number through payment apps like Venmo or PayPal, which require a username or email instead. You also cannot use it at a store or online retailer that asks for a card number.
If someone asks you to send money using only an account number — without a routing number, without a bank name, or through an unusual method — that is a sign to stop and verify the request through another channel before proceeding.
Key Takeaways
- Sending money via ACH or wire transfer requires both a routing number and an account number; one without the other will not work.
- Payment apps like Venmo, PayPal, and Cash App do not accept routing and account numbers — they use usernames, email addresses, or phone numbers instead.
- Your bank's bill pay service can send money to another person's bank account if you have both numbers, but it takes three to five business days.
- Wire transfers are faster (same day or next day) but cost money and cannot be reversed, so confirm the account details before sending.
- Scammers often ask for account numbers without routing numbers or ask you to send money through unusual channels — verify requests through a known phone number or in person.
ACH transfers: the standard way to move money between bank accounts
An ACH transfer (Automated Clearing House) is the most common method for sending money from one checking account to another. It requires both the routing number and the account number. Your bank's website or app will have a section for sending money to another bank account — sometimes called "Send Money," "Transfer," or "Pay to Another Account."
You will enter the recipient's routing number, account number, and account type (checking or savings). The transfer typically takes three to five business days. There is usually no fee for ACH transfers sent through your own bank, though some banks charge a small amount if you send more than a certain number per month.
ACH transfers are reversible if something goes wrong — if you enter the wrong account number, you can contact your bank and they may be able to stop or recall the transfer. This makes ACH safer than wire transfers for situations where you are less certain about the account details.
Wire transfers: faster but irreversible
A wire transfer moves money the same day or next business day and requires the same information: routing number and account number. You initiate a wire transfer through your bank's website, app, or by calling or visiting in person. Most banks charge $15 to $30 per outgoing wire transfer.
Wire transfers cannot be reversed once they leave your bank. If you send money to the wrong account, you have no automatic recourse — you would have to contact the receiving bank and ask them to return it, which they may or may not do. For this reason, confirm the routing and account numbers carefully before sending a wire, and consider calling the recipient to verify the numbers match what they gave you.
Wire transfers are useful when you need money to arrive quickly and you are certain about the account details. They are less useful for small amounts or situations where you are not completely sure the information is correct.
Bill pay services through your bank
Most banks offer a bill pay feature that lets you send money to another person's bank account. You enter the recipient's name, routing number, and account number, and your bank sends the money via ACH. This usually takes three to five business days and is free.
Bill pay is designed for paying bills and sending money to people you trust, since the transfer takes several days. You cannot use it for urgent transfers. Some banks limit how much you can send per day or per month through bill pay, so check your bank's rules before relying on it for a large transfer.
Payment apps and why they do not use routing numbers
Apps like Venmo, PayPal, Cash App, and Square Cash do not ask for routing numbers or account numbers. Instead, they use usernames, email addresses, or phone numbers to identify the recipient. These apps are linked to your bank account or debit card, but the app itself handles the connection — you do not share your account details with the person you are sending money to.
This design is intentional: it protects your account number from being shared with strangers. If you want to send money through one of these apps, ask the recipient for their username or email address associated with the app, not their bank account number.
Some of these apps do let you connect a bank account for faster transfers or higher limits, but you enter your account information into the app itself, not into a message or form you share with another person.
When someone asks for your account number to receive money
If you are receiving money and someone asks for your account number, you can safely give them your routing number and account number — these are not secret information. Your routing number is public (it is printed on your checks and available on your bank's website), and your account number is tied to your account but is not sensitive in the way a password or PIN is.
However, you should never give out your account number to someone you do not know or trust, or in response to an unsolicited request. Scammers sometimes pose as banks, employers, or government agencies and ask for account numbers to "verify" your identity or "deposit" money. If you are unsure whether a request is legitimate, hang up and call the organization directly using a phone number from their official website or a bill you received.
If you are sending money to someone and they ask for your account number instead of giving you theirs, that is backwards — stop and clarify the direction of the transfer before proceeding.
What to do if you sent money to the wrong account
If you made an ACH transfer to the wrong account, contact your bank immediately. Explain what happened and provide the date, amount, and receiving account information. Your bank can attempt to recall the transfer if it has not yet been processed (usually within one business day). If the transfer has already been received, your bank can contact the receiving bank and ask them to return the funds, but the receiving bank is not required to comply.
If you made a wire transfer to the wrong account, the situation is more difficult. Wire transfers are generally not reversible. Contact your bank and the receiving bank immediately and ask them to return the funds, but understand that they may not be able to do so. Some banks have fraud investigation units that can help, but recovery is not may provide.
To avoid this situation, always double-check the routing and account numbers before sending money, and consider calling the recipient to confirm the numbers are correct.
Frequently Asked Questions
Can someone steal money from my account if they have my routing and account number?
They can attempt an unauthorized ACH transfer, but your bank is required to investigate and reverse unauthorized transfers. Report any suspicious activity to your bank immediately. Your routing and account numbers are not as sensitive as a debit card number or online banking password, but you should still avoid sharing them with people you do not trust.
Is it safe to put my account number on a check?
Yes — checks are designed to display your routing and account numbers. Anyone who receives a check can see this information. If you are concerned about a specific check, you can stop payment through your bank.
What if the person I am sending money to does not know their routing number?
They can find it on a check, on their bank's website, or by calling their bank. Most banks also have a routing number lookup tool on their website where you can search by bank name and state. Ask the recipient to look it up rather than guessing.
Can I send money internationally using a routing and account number?
Not through a standard ACH transfer — ACH only works between U.S. bank accounts. For international transfers, you need a SWIFT code and IBAN (International Bank Account Number) instead. Contact your bank about international wire transfer options.
Why do payment apps ask for my bank account number if they do not share it with others?
Payment apps ask for your account number to link your bank account to the app so they can move money in and out. You enter it into the app itself, not into a message or form you share with the person you are sending money to. The app keeps your account information private and only uses it to process transfers on your behalf.