What happens when you insert your card and enter your PIN

When you put your card into an ATM, the machine reads the magnetic stripe or chip on the back and connects to your bank's system to verify who you are. You then enter your personal identification number (PIN) — a four- to six-digit code that only you should know. The ATM sends this information to your bank's servers, which confirm that the PIN matches the card. If it does, the machine unlocks and shows you your account options. If you enter the wrong PIN three times in a row, most ATMs will keep your card for security reasons.

This entire verification happens in seconds. Your bank is checking that the card is real, that it belongs to an active account, and that you have the right to access that account. Once the ATM confirms all three, it treats you as the account holder and lets you proceed.

Key Takeaways

  • Insert your card into the slot, enter your PIN when prompted, and the ATM will connect to your bank to verify your identity before showing you any options.
  • You can withdraw cash, check your balance, transfer money between your own accounts, and change your PIN at most ATMs, though the exact options depend on your bank.
  • The machine counts out your cash and deducts the amount from your account in real time — the transaction is complete the moment you take the money.
  • ATMs charge a fee if you use one owned by a different bank, and that fee appears on your statement within one or two business days.
  • If the ATM keeps your card or the machine malfunctions, contact your bank when ready; do not leave the ATM or walk away without reporting the problem.

Withdrawing cash and checking your balance

After you enter your PIN, the ATM displays a menu with options. Select "Withdrawal" to take out cash. The machine will ask you which account to withdraw from — usually checking or savings — and then show you preset amounts: $20, $40, $60, $100, and sometimes a "Custom Amount" option if you need a different sum. Choose the amount you want. The ATM will then count out the bills, dispense them into a slot at the front of the machine, and ask if you want a receipt.

To check your balance without withdrawing, select "Balance Inquiry" from the main menu instead. The ATM will display how much money is in the account you choose and offer you a receipt. This balance is current as of that moment, though transactions you made earlier in the day may still be processing and might not show up yet.

Both transactions — withdrawal and balance check — happen when ready. Money leaves your account the when ready you take the cash from the machine. Your bank records the transaction right away, so the withdrawal will appear on your statement the next business day.

Transferring money between your own accounts

If you have more than one account at the same bank — for example, a checking account and a savings account — you can move money between them at the ATM. Select "Transfer" from the menu, then choose which account to transfer from and which account to transfer to. Enter the amount and confirm. The ATM will process the transfer when ready, and both accounts will update within seconds.

This feature works only for accounts in your own name at the same bank. You cannot use an ATM to send money to another person's account or to an account at a different bank. For those transactions, you would need to use online banking, a mobile app, or visit a branch in person.

Changing your PIN and other account settings

Most ATMs let you change your PIN without visiting a branch. Select "Change PIN" or "Settings" from the menu, enter your current PIN to confirm your identity, then enter your new PIN twice to make sure you typed it correctly. The change takes effect when ready. Write down your new PIN somewhere safe — if you forget it, you will need to call your bank or visit a branch to reset it.

Some ATMs also let you adjust other settings, such as turning overdraft protection on or off, or requesting a new debit card if yours is damaged. The exact options vary by bank. If you do not see an option you need, you can always call your bank's customer service line or log into your online account to make the change.

Understanding ATM fees and surcharges

If you use an ATM owned by your own bank, there is no fee. If you use an ATM owned by a different bank — called an "out-of-network" ATM — the other bank usually charges you a fee, typically between $2 and $3 per transaction. Your own bank may also charge you a separate fee for using an out-of-network machine. Both fees appear on your statement within one or two business days.

Some banks offer accounts that reimburse out-of-network ATM fees, or they partner with networks of ATMs you can use for free. Check your account agreement or call your bank to find out what fees explore to you. If you use out-of-network ATMs frequently, switching to an account with fee reimbursement or finding an ATM owned by your bank can save you money over time.

What to do if the ATM keeps your card or malfunctions

If the machine does not return your card after you complete a transaction, or if it returns your card but does not dispense the cash you requested, do not leave the ATM. Look for a phone number or customer service button on the machine itself — most ATMs display a number you can call when ready. Call that number right away and explain what happened. Your bank will note the problem and investigate.

If the ATM ate your card, your bank will either mail you a replacement or let you pick one up at a branch. In the meantime, you can still access your money through online banking, a mobile app, or by visiting a branch in person. If the machine took your cash without dispensing it, your bank will review the ATM's internal records to confirm the malfunction and credit your account. These investigations usually take three to five business days.

Never walk away from a malfunctioning ATM without reporting it. The longer you wait, the harder it is for your bank to prove what went wrong and help you.

Frequently Asked Questions

Can I withdraw money from an ATM if I do not have a debit card?

No. ATMs require a card to read your account information. If you do not have a debit card, you can withdraw money by visiting a branch in person and speaking to a teller, or by using your bank's mobile app to request a cardless withdrawal at some ATMs — though not all banks offer this feature.

What happens if I forget my PIN?

You will not be able to use the ATM. Call your bank's customer service number or visit a branch in person with a photo ID, and they will help you reset your PIN. Some banks let you reset it through their mobile app or website. Do not try to guess your PIN more than twice — the ATM will lock you out after three wrong attempts.

Is it safe to use an ATM at night or in an unfamiliar location?

ATMs in banks, grocery stores, and well-lit public places are generally safer than those in isolated spots. Be aware of your surroundings, cover the keypad when you enter your PIN so others cannot see it, and take your card and cash when ready after the transaction. If something feels wrong, leave and use a different ATM.

Can I deposit cash or checks into an ATM?

Some ATMs accept deposits, but not all. Look for a slot labeled "Deposits" on the machine. If your ATM has one, you can insert an envelope with cash or checks, and the money will be added to your account. The funds typically appear in your account within one business day, though some banks take longer to process ATM deposits.

Why does my ATM withdrawal show a different amount than what I requested?

This usually happens because the ATM ran out of one denomination of bill. For example, if you requested $100 and the machine was out of $20 bills, it might dispense five $20 bills instead of one $100 bill. The total amount is correct — the ATM just gave it to you in different bills. If the amount is actually wrong, contact your bank when ready.