A bank overdraft is when you withdraw or spend more money than you have in your account, and the bank covers the difference

Your bank account has a balance. When you make a purchase, write a check, or use your debit card, that amount leaves your account. If you try to spend more than what's sitting there, one of two things happens: the transaction gets declined, or the bank pays it anyway and your account goes negative. That second scenario—when the bank covers the shortfall—is an overdraft.

The bank is essentially giving you a short-term loan for a few dollars or a few hundred, depending on the transaction. You owe that money back when ready. Most banks charge a fee for this service, usually between $25 and $35 per overdraft, though some charge more. If your account stays negative for several days, you may face additional fees.

Overdrafts happen most often with debit card purchases, checks, and automatic bill payments—transactions that don't require you to have the money in hand at the moment you authorize them. Online transfers and ATM withdrawals are more likely to be declined if you don't have the funds, because the bank can check your balance in real time.

Key Takeaways

  • An overdraft occurs when you spend more money than your account balance, and your bank covers the difference temporarily.
  • Banks typically charge $25 to $35 per overdraft transaction, plus additional daily fees if your account stays negative.
  • Overdraft protection is an optional service that some banks offer to prevent transactions from being declined, but it comes with fees.
  • You can turn off overdraft coverage for debit card and ATM transactions at most banks, which will cause those transactions to be declined instead.
  • Repeated overdrafts can damage your banking relationship and may result in your account being closed by the bank.

How overdraft fees work and what they cost

When your account goes negative, the bank charges you a fee. This fee is separate from the amount you owe back. If you overdraft by $5 and the fee is $35, you now owe $40 total. The fee appears as a separate line item on your statement.

If your account stays negative for more than a day or two, many banks charge an additional daily fee—sometimes called a "sustained overdraft fee" or "negative balance fee"—usually $5 to $10 per day. This can add up quickly. An account that stays $50 negative for five days could rack up $25 to $50 in daily fees on top of the initial overdraft fee.

Some banks charge multiple overdraft fees in a single day if you have multiple transactions that push your account further negative. Others cap the number of fees they'll charge per day, usually at one or two. Check your bank's overdraft policy in your account agreement or on their website to understand their specific rules.

Overdraft protection versus overdraft coverage

Overdraft protection is a service your bank may offer that links your checking account to a savings account, money market account, or credit line. If a transaction would overdraft your checking account, the bank automatically transfers money from the linked account to cover it. You pay a small transfer fee—usually $1 to $3—instead of a large overdraft fee.

This is different from standard overdraft coverage, where the bank straightforward covers the transaction and charges you the overdraft fee. Overdraft protection is optional and must be set up in advance. If you have it and the linked account has enough money, the transfer happens automatically and you avoid the larger fee.

Overdraft protection only works if your linked account has money in it. If both accounts are empty, the transaction will still be declined or you'll still overdraft and pay the fee. Some people set up overdraft protection with a credit card or line of credit instead of another bank account, which means the bank is lending you money at credit card rates rather than transferring your own funds.

When you can decline overdraft coverage

Federal law requires banks to let you opt out of overdraft coverage for debit card purchases and ATM withdrawals. If you decline overdraft coverage, these transactions will straightforward be declined at the point of sale—you won't be able to complete the purchase, and you won't be charged a fee.

You cannot opt out of overdraft coverage for checks and automatic bill payments. Banks are required to pay these even if your account is negative, which is why check overdrafts are common. If you want to avoid overdrafts on automatic payments, you need to monitor your balance or set up overdraft protection.

To turn off overdraft coverage for debit and ATM transactions, contact your bank directly—by phone, in person, or through your online banking portal. Some banks make this straightforward; others require a written request. Once you opt out, declined transactions won't appear on your account, and you won't pay overdraft fees for them.

What happens to your account after repeated overdrafts

One or two overdrafts won't usually cause problems beyond the fees. But if you overdraft frequently—more than a few times per month—your bank may close your account. Banks use overdraft patterns as a sign of financial instability or mismanagement, and they have the right to terminate your relationship without cause.

When a bank closes your account, you'll receive notice (usually 30 days) and your remaining balance will be mailed to you as a check. The closure will be reported to ChexSystems, a banking history database that other banks check when you try to open a new account. This can make it harder to open accounts at other banks for several years.

Beyond account closure, repeated overdrafts don't directly affect your credit score—overdraft activity isn't reported to credit bureaus. However, if an overdraft goes unpaid and the bank sends it to a debt collector, that collection account will appear on your credit report and damage your score.

How to avoid overdrafts

The most straightforward way to avoid overdrafts is to keep a buffer in your account—money you don't spend. Many people keep $100 to $500 as a cushion, depending on their income and spending patterns. This gives you room for unexpected transactions or timing delays between when you spend money and when it leaves your account.

Set up account alerts through your bank's app or website. Most banks let you receive notifications when your balance drops below a certain amount—$50, $100, or whatever threshold you choose. These alerts give you time to deposit money or adjust your spending before you overdraft.

Track your spending in real time using your bank's mobile app or a budgeting tool. Know what's in your account before you make a purchase. If you use multiple payment methods—debit card, checks, automatic payments—keep a running total of pending transactions so you know your true available balance, not just what the app shows.

If you're prone to overdrafts, set up overdraft protection with a linked savings account or credit line. The transfer fee is much smaller than an overdraft fee, and it prevents the cascade of daily fees that can follow a negative balance.

Overdrafts versus declined transactions

When a transaction is declined, the merchant's system rejects it because your account doesn't have enough money. You don't pay a fee, and the transaction doesn't go through. The merchant may ask you for a different payment method, or the purchase straightforward doesn't happen.

With an overdraft, the transaction does go through, your account goes negative, and you pay a fee. From a merchant's perspective, there's no difference—they get paid either way. From your perspective, a declined transaction costs you nothing but inconvenience. An overdraft costs you $25 to $35 or more.

Some people prefer declined transactions because they're free and force you to stay within your means. Others prefer overdraft coverage because it prevents embarrassment at checkout or ensures critical bills get paid. The choice depends on your situation and your bank's policies.

Frequently Asked Questions

Can I get an overdraft fee reversed?

Yes, sometimes. If you have a good history with your bank and this is your first overdraft, call and ask. Many banks will reverse one fee as a courtesy. If you overdraft frequently, reversals become less likely. It never hurts to ask, especially if the overdraft was caused by a bank error or unusual circumstance.

Does an overdraft affect my credit score?

No, overdrafts don't appear on your credit report and won't lower your credit score. However, if the overdraft goes unpaid and gets sent to a debt collector, the collection account will be reported and will damage your score. Paying back the overdraft promptly keeps this from happening.

What's the difference between an overdraft and a bounced check?

A bounced check is a check that the bank refuses to pay because there's not enough money in the account. An overdraft is when the bank pays the check anyway and your account goes negative. Some banks pay checks and charge an overdraft fee; others bounce the check and charge a returned check fee instead. Your bank's policy determines which happens.

Can I overdraft my savings account?

Yes, savings accounts can overdraft just like checking accounts. However, savings accounts typically have fewer transactions, so overdrafts are less common. The fees and rules are usually the same as for checking accounts.

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

The bank will deduct the amount from future deposits to your account. If you don't deposit money and the overdraft remains unpaid for 30 to 60 days, the bank may close your account and report it to ChexSystems. After that, a debt collector may contact you, and the debt will appear on your credit report.