A debit card lets you spend money directly from your checking account without writing a check

A debit card is a plastic card linked to your checking account that you can use to pay for things in stores, online, or over the phone. When you swipe or insert the card, the money comes straight out of your account — you are spending money you already have, not borrowing it. This is different from a credit card, where you borrow money and pay it back later.

Most banks give you a debit card when you open a checking account, or you can ask for one if you do not have one yet. The card has your name on it, a card number, and an expiration date. You will also get a PIN (personal identification number) — a four-digit code that only you know — which you use to prove the card is really yours when you make a purchase in person.

Key Takeaways

  • A debit card pulls money directly from your checking account, so you can only spend what you have.
  • You will need your PIN to make purchases in stores; online and phone purchases usually just need the card number and expiration date.
  • Most debit cards come with fraud protection, meaning the bank will refund unauthorized charges if you report them quickly.
  • Overdraft protection is optional and can let you spend more than your balance, but it usually costs a fee.
  • You can use your debit card at ATMs to withdraw cash or check your balance without visiting a bank branch.

When you use your PIN versus when you do not

When you buy something in a store, the cashier will ask you to either swipe your card in a machine or insert it and leave it there while they process the payment. The machine will then ask you to enter your PIN on a keypad. This is called a PIN transaction or debit transaction. Entering your PIN proves to the bank that you authorized the purchase.

Online and phone purchases work differently — you cannot enter a PIN through a website or over the phone. Instead, you give the merchant your card number, expiration date, and the three-digit security code on the back of the card. The merchant sends this information to the bank, and the bank processes the payment without a PIN. This is called a signature transaction or card-not-present transaction, even though no one is actually signing anything anymore.

Some stores let you choose. If the cashier asks "Debit or credit?" they are asking whether you want to enter your PIN (debit) or just let them swipe the card without a PIN (credit). Both pull money from your checking account — the difference is just whether you prove it is you by entering your PIN.

What happens if someone uses your card without permission

If someone steals your debit card number or uses your card without your permission, federal law protects you. You are not responsible for unauthorized charges if you report them to your bank. The key is to report the fraud quickly — most banks will refund the money if you call within 60 days of the charge appearing on your statement.

The faster you report it, the better. If you notice a charge you did not make, call your bank's customer service number (on the back of your card or your statement) right away. Tell them which charge is not yours. The bank will usually refund the money while they investigate, which takes a few days to a few weeks. During that time, the money is back in your account and you can use it.

To protect yourself, check your account regularly — many banks let you see purchases online or through a phone app within hours of the charge. If you lose your card, call your bank when ready and they will cancel it and send you a new one, usually within five to ten business days.

Overdraft protection and what it costs

Most banks offer overdraft protection, which is optional. If you turn it on, the bank will let you spend more money than you have in your account — they cover the difference as a short-term loan. If you try to buy something for $50 but only have $30, the bank will let the purchase go through and you will owe them $20 plus a fee.

That fee is usually $25 to $35 per transaction, and it adds up fast if you overdraft multiple times. Some banks charge one fee per day even if you make several purchases over your limit. Other banks let you overdraft only once per day. Read your account agreement or ask your bank what their overdraft fee is and how often they charge it.

You can turn overdraft protection off if you want to. Without it, a purchase will be declined if you do not have enough money — the card will not work and you will not be charged a fee. Many people prefer this because it forces them to spend only what they have. If you are not sure whether you have it, call your bank or log into your account online and look for overdraft settings.

Using your debit card at ATMs

You can use your debit card at an ATM (automated teller machine) to withdraw cash from your checking account. Insert your card, enter your PIN, and the machine will show you your balance and let you choose how much cash to take out. Most ATMs dispense money in $20 bills, though some offer $10 or $5 bills.

If you use an ATM owned by your bank, there is usually no fee. If you use an ATM owned by a different bank, you may be charged a fee — usually $2 to $3 per withdrawal. Some banks refund these fees if you use their ATM network, so ask your bank which ATMs are free for you to use.

You can also use an ATM to check your balance, change your PIN, or deposit a check (if the ATM has a deposit slot). These services are free at your bank's ATMs.

The difference between debit and credit cards

A debit card and a credit card look similar, but they work very differently. A debit card spends money you already have in your checking account. A credit card borrows money from the credit card company, and you pay them back later — usually with interest if you do not pay the full balance right away.

Debit cards do not build credit history the way credit cards do. Credit history is a record of whether you borrow money and pay it back on time. Banks and other lenders use this record to decide whether to lend you money for a car, a house, or other big purchases. Using a debit card does not help or hurt your credit history because you are not borrowing anything.

If you are new to banking and want to build credit history, you may eventually want to get a credit card — but a debit card is a good place to start because you can only spend what you have and there is no risk of debt.

Keeping your debit card safe

Treat your debit card like cash. Do not share your PIN with anyone, even bank employees or family members. Do not write your PIN on the card or keep it in your wallet. Memorize it instead.

When you use your card in a store, watch the cashier swipe it — do not let it out of your sight. If you are using a card reader at a gas pump or ATM, look for signs of tampering, like a loose or crooked card slot. Criminals sometimes attach fake card readers to steal card numbers.

Keep your card in a safe place at home, and carry it in a wallet or bag where it will not fall out. If your card is lost or stolen, call your bank right away — the sooner you report it, the sooner they can cancel it and send you a new one.

Frequently Asked Questions

Can I use my debit card internationally?

Yes, most debit cards work in other countries at ATMs and stores. However, your bank may charge a foreign transaction fee of 1 to 3 percent of the amount you spend. Some banks also charge a fee just for using an ATM abroad. Call your bank before you travel to ask about their international fees and to let them know you will be using your card overseas — this prevents them from blocking your card thinking it is fraud.

What if I forget my PIN?

Call your bank's customer service number on the back of your card or your statement. They will verify your identity by asking you security questions, then they can reset your PIN or send you a temporary one. You can usually set a new PIN at an ATM or online through your bank's website.

Do I have to use my debit card?

No. You can write checks, transfer money online, or set up automatic payments from your checking account instead. A debit card is just one way to access your money. Some people use it for everyday purchases and checks for bills, or they use it only at ATMs to withdraw cash.

Can I get cash back when I use my debit card at a store?

Yes. When you pay with your debit card at a grocery store or other retailer, you can ask the cashier for cash back. They will add the amount to your purchase, and you will get the cash in your change. This is free and is a convenient way to get cash without going to an ATM.

What if my debit card is declined?

This usually means you do not have enough money in your account, or your bank thinks the purchase might be fraud. Check your balance online or at an ATM. If you have enough money, call your bank to ask why the card was declined — they may have temporarily blocked it for security reasons and can unblock it right away.