An overdraft is when your bank lets you spend money you don't have, then charges you a fee

When you make a purchase or withdrawal and your account balance drops below zero, your bank covers the difference. That negative balance is the overdraft. Your bank is lending you that money for a few seconds or a few days, and they charge you a fee for doing it—usually $25 to $35 per transaction, though some banks charge more.

Not every bank offers overdraft protection, and not every account has it turned on. Some banks will simply decline your transaction if you don't have enough money. Others will let the transaction go through and then hit you with a fee. The difference matters, because a single purchase can trigger multiple overdraft fees if several transactions post on the same day.

Overdrafts are different from a line of credit or a loan. You're not signing up for anything or getting approved. Your bank is making a split-second decision to cover you, and you're paying for that decision immediately through a fee, not through interest over time.

Key Takeaways

  • An overdraft happens when a transaction brings your account balance below zero, and your bank covers the shortfall by charging you a fee.
  • Overdraft fees typically range from $25 to $35 per transaction, and multiple transactions on the same day can each trigger a separate fee.
  • You can usually turn overdraft protection on or off through your bank's app or by calling customer service, though some banks require you to opt in first.
  • If you don't have overdraft protection and try to spend money you don't have, your transaction will be declined instead of going through.

How overdraft fees stack up when multiple transactions post the same day

If you have $50 in your account and three debit card purchases of $30 each post on the same day, you could face three separate overdraft fees—one for each transaction that pushed you into negative territory. Your bank processes these transactions in order, so the first one might go through and trigger a $35 fee, then the second one does the same, then the third. You end up $40 in the negative and $105 in fees.

The timing matters because transactions don't always post in the order you made them. A purchase you made in the morning might post after a check you wrote yesterday. Your bank decides the order, and that order determines which transactions trigger fees. Some banks sort by transaction type (checks first, then debit card, then ACH transfers) or by amount (largest first). This is called transaction reordering, and it can make overdraft fees worse.

Many banks now cap the number of overdraft fees you can incur in a single day—often at three or four fees maximum. But that cap varies by bank, so check your account agreement or call your bank to find out what yours is.

Overdraft protection versus overdraft fees

Overdraft protection is a service that prevents overdrafts by pulling money from another account you own—usually a savings account or a linked credit card. When a transaction would overdraw your checking account, the bank transfers money from your backup account instead. You might pay a small transfer fee (usually $1 to $3), but you avoid the larger overdraft fee.

This is different from overdraft coverage, which is when the bank simply covers the overdraft and charges you a fee. With overdraft coverage, you're not linking another account; the bank is just lending you the money for a moment.

Most banks require you to opt into overdraft coverage for debit card and ATM transactions. Without opting in, your card will be declined if you don't have enough money. For checks and ACH transfers, many banks cover overdrafts automatically and charge a fee whether you asked for it or not. You can usually turn this off by calling your bank or changing your account settings online.

When overdrafts turn into a debt spiral

Overdraft fees can compound quickly if you're already short on money. You overdraw by $20, get charged $35, and now you're $55 in the negative. The next transaction triggers another fee. Within a week, you might owe your bank $200 in fees on top of the original shortfall. This is especially common for people living paycheck to paycheck, because one unexpected expense can trigger a cascade of fees before your next deposit arrives.

Some banks offer overdraft grace periods—a window of time (usually a few hours to a full business day) during which you can deposit money to cover the overdraft before the fee is charged. If you catch the problem early enough and move money into the account, you can avoid the fee entirely. Not all banks offer this, so ask yours whether it does.

If you're regularly overdrawing your account, switching to a bank that doesn't charge overdraft fees or that caps fees at a lower amount can save you hundreds of dollars a year. Some online banks and credit unions charge no overdraft fees at all, or charge a flat fee instead of a per-transaction fee.

How to turn overdraft protection on or off

Most banks let you control overdraft coverage through your online account or mobile app. Look for settings labeled "overdraft protection," "overdraft coverage," or "overdraft options." You can usually toggle it on or off for debit card transactions, ATM withdrawals, and ACH transfers separately.

For checks and ACH transfers, you may not have the option to turn off overdraft coverage—many banks cover these automatically and charge a fee. If your bank does let you opt out, declining overdraft coverage means checks will bounce and ACH transfers will be rejected if you don't have enough money. A bounced check can damage your relationship with the person or business you wrote it to, and some merchants charge their own bounced-check fee.

If you can't find the setting in your app, call your bank's customer service line. They can turn overdraft protection on or off for you over the phone and explain which transactions are covered and which aren't.

Overdraft fees versus NSF fees

An NSF fee (non-sufficient funds) is charged when a transaction is rejected because you don't have enough money. An overdraft fee is charged when a transaction is approved even though you don't have enough money. The difference is whether the bank covered you or declined you.

Some banks charge both: if you don't have overdraft protection and a check bounces, you might get an NSF fee from your bank and another NSF fee from the person or business you wrote the check to. That's two fees for one mistake. If you had overdraft protection turned on, the check would clear and you'd pay one overdraft fee instead.

Neither fee is refundable just because you didn't intend to overdraw. But if your bank made an error—if they charged you a fee for a transaction that shouldn't have posted, or if they charged multiple fees for a single transaction—you can call and ask them to reverse it. Banks sometimes do, especially if you've been a customer for a long time or if it's the first time you've asked.

Frequently Asked Questions

Can I get an overdraft fee reversed?

Yes, but it's not may provide. Call your bank and explain what happened. If the fee was an error on their part, they'll usually reverse it. If you simply overspent, they may reverse one fee as a courtesy, especially if you've never asked before. Banks have no obligation to do this, but many will if you ask politely and it's your first request.

What happens if I don't pay back an overdraft?

Your bank will keep the negative balance on your account and may eventually close it. If the overdraft is large enough, they may send it to a collection agency. A closed account and a collection account will both damage your credit score and make it harder to open a new bank account elsewhere.

Does overdraft protection hurt my credit score?

No. Overdraft fees and overdraft protection don't show up on your credit report because they're not a loan or a line of credit. Only if your account goes to collections or your bank closes your account will it affect your credit.

Can I overdraw my savings account?

Yes, most banks allow overdrafts on savings accounts the same way they do on checking accounts. You'll pay the same overdraft fee. Some banks treat savings accounts differently and decline transactions instead of covering them, so check your account agreement.

What's the difference between overdraft and a line of credit?

An overdraft is automatic and unplanned—your bank covers you and charges a fee. A line of credit is something you apply for and are approved for in advance. You pay interest on what you borrow, not a flat fee per transaction. A line of credit is usually cheaper if you need to borrow money regularly.