The fastest way depends on where your money is now

If you're moving money from a checking account at the same bank, you can usually transfer it online in seconds—the money lands the same day or next business day. If you're moving it from a different bank, you have three main routes: ACH transfer (free, takes 1–3 business days), wire transfer (fast, costs $15–$30), or external transfer through your online savings account's app or website (free, takes 1–3 business days). The online savings account you're sending to will ask you to verify the source account first, usually by confirming two small deposits the bank makes to your checking account, or by logging into your other bank directly through their portal.

Same-bank transfers are instant because the money never leaves the bank's system. Cross-bank transfers take longer because they move through the ACH network, a clearing system that batches payments and settles them on a fixed schedule. Wire transfers bypass that queue but cost money and are harder to reverse if you make a mistake.

Key Takeaways

  • Transfers between accounts at the same bank usually complete the same day or next business day at no cost.
  • ACH transfers from a different bank are free but take 1–3 business days because they move through a clearing network.
  • Wire transfers arrive faster (same day or next day) but cost $15–$30 and are difficult to cancel once sent.
  • Your online savings account will ask you to verify the source account by confirming small test deposits or by logging in directly to your other bank.
  • Weekends and bank holidays pause ACH and wire processing, so a Friday transfer may not land until Tuesday.

Setting up an ACH transfer from your checking account

Log into your online savings account and look for "Add External Account," "Link Account," or "Transfer Money" in the menu. Enter your checking account number and routing number (you'll find both on a check or by calling your bank). The savings account will send two small deposits—usually under $1 each—to your checking account within 1–2 business days. Go back to your checking account online, find those deposits, and enter the exact amounts into the savings account's verification screen. Once verified, you can transfer money freely.

Some banks skip the deposit verification and let you log directly into your checking account through their portal instead. This is faster: you enter your checking account username and password, the bank confirms the account is real, and you can transfer immediately. This method is secure because you're logging in through the bank's encrypted connection, not giving your password to the savings account.

After verification, set up the transfer amount and choose your transfer date. Most banks let you schedule transfers in advance. The money will leave your checking account on the date you pick and arrive at your savings account 1–3 business days later, depending on when the ACH network processes the batch.

Using a wire transfer when you need money faster

Wire transfers move the same day if you send before your bank's cutoff time (usually 2 or 3 p.m. on business days) or the next business day if you send after. You'll need your online savings account's wire instructions: the bank's name, routing number, and your account number. Call your checking bank's wire department or use their app to initiate the transfer, specify the amount, and provide the receiving bank's details.

Wire transfers cost $15–$30 per transfer, depending on your bank. Some banks charge less for domestic wires (within the US) and more for international ones. Ask your bank for the exact fee before you send. Once a wire leaves your account, you cannot cancel it—the money is gone. If you send it to the wrong account by mistake, you'll have to contact the receiving bank and ask them to return it, which may take weeks or may not work at all.

Wire transfers are best for large amounts where the speed is worth the cost, or when you need the money in your savings account urgently and ACH timing won't work. For routine transfers, ACH is free and only slightly slower.

Transferring from a savings account at a different bank

The process is the same as transferring from a checking account: add the external account to your online savings account, verify it with test deposits or direct login, then transfer. The only difference is that some banks limit how much you can transfer per day or per month from external accounts—this is a fraud prevention measure. Check your new savings account's transfer limits before you try to move a large sum.

If you're moving money from an old savings account at a brick-and-mortar bank, you may need to call that bank to authorize the outgoing transfer. Some banks require verbal confirmation before they'll let money leave a savings account, especially if it's the first time. Have your account number and ID ready when you call.

What to do if your transfer is delayed or stuck

ACH transfers that don't arrive within 3 business days are unusual but do happen. Check your online savings account first: look for a "Pending Transfers" or "Transaction History" section to see if the transfer is still processing. If it shows as completed on the savings account side but hasn't arrived at your checking account, contact your checking bank—the problem is on their end. If it shows as pending on the savings account side, contact the savings bank.

Transfers sent on Friday or before a holiday will not process until the next business day the ACH network operates. A Friday 3 p.m. transfer may not land until Wednesday. If you're in a rush, ask your bank when their cutoff time is and whether they process on weekends (most do not).

If a transfer fails, your bank will send you a reason code—usually something like "account closed" or "invalid routing number." Check that you entered the account and routing numbers correctly. If you did and the transfer still fails, call your bank to troubleshoot. Do not attempt the transfer multiple times in a row; each attempt creates a separate transaction and may trigger fraud alerts.

Protecting yourself from fraud during transfers

Verify the account number and routing number twice before you send any money. A single wrong digit sends your money to someone else's account. Write down the numbers from your check or your bank's website, then read them back aloud to yourself or have someone else read them to you.

Do not transfer money to an account you've never verified. If someone asks you to send money to a new account, call the person back using a phone number you know is real (not one they gave you) and confirm the account details. Scammers often pose as your bank or a company you do business with and ask you to "verify" your account by transferring money.

Use your bank's official app or website to transfer money, not links in emails or texts. If you receive an email asking you to transfer money or verify your account, go directly to your bank's website by typing the address into your browser—do not click the link in the email.

Frequently Asked Questions

Can I transfer money to an online savings account on the weekend?

You can initiate the transfer through your bank's app or website on the weekend, but it won't process until the next business day. The ACH network and wire system only operate on business days (Monday through Friday, excluding federal holidays). A transfer you send Saturday morning will start processing Monday.

What's the difference between a routing number and an account number?

Your routing number identifies which bank you use (the same for all customers at that bank). Your account number identifies your specific account within that bank. You need both to transfer money. Both appear on the bottom left of a check, or you can find them by logging into your bank's website or calling customer service.

Do I have to verify my account with test deposits, or can I just log in?

It depends on your bank. Many online banks let you log into your other bank directly through their portal, which verifies the account instantly. Others require the test deposit method. Your savings account will tell you which option is available when you start adding an external account.

What happens if I send money to the wrong account?

Contact your bank immediately and explain the mistake. For ACH transfers, your bank can sometimes recall the money within a day or two. For wire transfers, contact the receiving bank and ask them to return the funds—this may take weeks or may not work if the account holder has already withdrawn the money. The sooner you report the error, the better your chances of recovery.

Is there a limit to how much I can transfer at once?

Yes, most banks set daily and monthly transfer limits for external accounts—often $5,000 to $25,000 per day, though this varies. Check your savings account's settings or call the bank to find out your limit. If you need to move more than the limit, you can make multiple transfers on different days, or ask your bank to raise the limit temporarily.