Your bank covers the transaction, then charges you a fee

When you spend more money than you have in your account, your bank can choose to cover the difference. That transaction goes through. Your account balance becomes negative. Then the bank charges you an overdraft fee—typically $25 to $35 per transaction, though some banks charge less and some charge more.

The key word is "can." Your bank is not required to cover overdrafts. Some banks decline the transaction instead, which stops it from going through and prevents the fee. But most large banks have overdraft coverage turned on by default, which means they will cover transactions and charge you for it.

You do not owe the bank the overdraft fee as a debt. It is a service charge for covering your shortfall. But if you do not bring your account back to zero or above within a set time—usually a few days—the bank may charge additional fees or close your account.

Key Takeaways

  • When you overdraft, your bank covers the transaction and charges a fee, usually $25 to $35, and your account balance goes negative.
  • Banks can turn overdraft coverage off, which means transactions will be declined instead of covered, preventing fees but also blocking your purchase.
  • If your account stays negative for several days, you may face additional fees or have your account closed by the bank.
  • The order in which transactions post to your account (not the order you made them) determines which ones overdraft and which ones do not.
  • Bringing your account positive again stops new fees from being charged, but does not erase fees you have already been charged.

How the overdraft actually happens: transaction order and timing

Overdrafts are not always caused by the transaction you think they are. Banks process transactions in a specific order, and that order determines which ones trigger overdraft fees.

Say you have $100 in your account. You swipe your debit card for $60, then write a check for $80, then use an ATM to withdraw $40. You made those transactions in that order. But your bank may process them in a different order: checks first, then debit card transactions, then ATM withdrawals. So the check for $80 posts first, leaving you with $20. Then the debit card for $60 posts, overdrafting you by $40 and triggering a fee. Then the ATM withdrawal for $40 posts, triggering another fee. You end up with two overdraft fees even though you only overspent by $20.

This is called transaction reordering, and banks are allowed to do it. Some banks process transactions from largest to smallest, which can create more overdrafts. Others process them in the order they actually happened. Check your bank's overdraft policy or call and ask how they order transactions—it changes the math of whether you will overdraft.

Overdrafts also depend on when transactions post, not when you make them. A debit card transaction can take one to three business days to post. A check can take three to five days. An ACH transfer (like a bill payment) can take one to two days. Until a transaction posts, your available balance does not reflect it, so you might think you have money when you do not.

What happens to your account in the days after you overdraft

The moment your account goes negative, the overdraft fee appears. Most banks charge the fee within one business day. If your account is still negative after a few days, you may face a second fee—some banks charge one fee per day your account stays negative, up to a limit.

If you bring your account positive again (by depositing money or having a paycheck direct-deposited), new overdraft fees stop being charged. The fees you already paid do not come back. Your account is now in the black, and the overdraft is over.

If your account stays negative for a longer period—usually 30 to 60 days depending on the bank—the bank may close your account and send your negative balance to a collections agency. This is rare, but it happens. The bank reports the closed account to ChexSystems, a banking history database, and you may have trouble opening a new account elsewhere for up to five years.

Some banks will work with you if you call and explain the overdraft. They may reverse one fee as a courtesy, especially if you have been a customer for a long time or if this is your first overdraft. It never hurts to ask, but do not count on it.

The difference between overdraft coverage and overdraft protection

Overdraft coverage is what most banks offer by default. When you overdraft, they cover the transaction and charge you a fee. You do not have to do anything to set it up—it is already on.

Overdraft protection is a separate service you can set up to prevent overdrafts in the first place. You link a savings account, credit card, or line of credit to your checking account. If your checking account would overdraft, the bank automatically transfers money from the linked account instead. You may pay a small transfer fee (usually $1 to $3) instead of an overdraft fee ($25 to $35).

Overdraft protection only works if you have money in the linked account. If you link a savings account with $50 and your checking account overdrafts by $100, the bank will transfer the $50 and then charge you an overdraft fee for the remaining $50.

You can also turn off overdraft coverage entirely. This means transactions will be declined if you do not have enough money. Your debit card will not work. Your check will bounce. But you will not pay an overdraft fee. Some banks make this opt-in; others require you to call and ask them to turn it off.

How overdraft fees add up over time

A single overdraft fee is painful. Multiple overdrafts in a short time can spiral quickly. If you overdraft three times in one week and each fee is $35, you have paid $105 in fees on top of the original shortfall.

The problem gets worse if you are living paycheck to paycheck. You overdraft on Tuesday. You get paid on Friday. But the overdraft fee hits your account on Wednesday, making your balance even more negative. When your paycheck deposits on Friday, some of it goes to cover the overdraft, and some goes to cover the fee, leaving you with less money than you expected. If you are not careful with your math, you overdraft again the following week.

Banks know this pattern happens. Some banks charge a maximum number of overdraft fees per day (usually three to five) to prevent the spiral. Others do not. Check your bank's policy on the number of fees they will charge in a single day.

What to do if you overdraft and cannot pay it back when ready

Call your bank as soon as you realize you have overdrafted. Do not wait. Explain what happened and ask if they will reverse the fee. Some banks will do this once per year for customers in good standing. Some will not reverse it but may offer a grace period before charging additional fees.

If your bank will not help, deposit money to bring your account positive as soon as you can. Even a small deposit stops new fees from being charged. If you cannot deposit anything right now, ask your bank how long they will let your account stay negative before they close it and send it to collections. This gives you a important date to work toward.

If you have a paycheck coming, ask your employer if they can direct-deposit it early or if you can pick up a paper check to cash at a check-cashing service. This gets money into your account faster than waiting for the normal pay cycle.

Do not ignore the overdraft. If your account stays negative and you do not respond to the bank's notices, they will close the account and the debt will follow you. It is easier to deal with it now.

How to avoid overdrafting in the future

The most reliable way to avoid overdrafts is to keep a buffer in your checking account—money you do not spend. This could be $100, $500, or whatever amount makes you feel safe. You treat it as if it is not there. This way, if you miscalculate or a transaction posts later than you expected, you do not go negative.

Set up account alerts. Most banks let you set a low-balance alert that texts or emails you when your balance drops below a certain amount. This gives you time to move money or hold off on spending before you overdraft.

Turn off overdraft coverage if you prefer to have transactions declined rather than covered. This prevents fees but also means your card will not work if you do not have money. Some people find this annoying; others find it a useful wake-up call.

Use your bank's mobile app or online banking to check your balance before you spend. Do not rely on the balance you see at the ATM or the last receipt you got—those do not include pending transactions. Check the "available balance" in your app, which accounts for transactions that have not posted yet.

If you overdraft regularly, consider switching to a bank that does not charge overdraft fees or that charges lower fees. Some online banks and credit unions have no overdraft fees or charge $5 to $10 instead of $25 to $35.

Frequently Asked Questions

Can a bank overdraft my account without my permission?

Yes. Overdraft coverage is usually turned on by default, which means your bank can cover transactions and charge you a fee without asking first. You can turn it off by calling your bank and asking them to decline transactions instead of covering them. Some banks require you to opt in to overdraft coverage, but most do the opposite.

Will an overdraft hurt my credit score?

An overdraft itself does not show up on your credit report and does not hurt your score. But if your account stays negative for a long time and the bank sends it to collections, that will appear on your credit report and will hurt your score. Paying the overdraft quickly prevents this.

What is the difference between an overdraft and a bounced check?

An overdraft happens when your bank covers a transaction and charges you a fee. A bounced check happens when your bank declines the check because you do not have enough money. With overdraft coverage on, checks usually do not bounce—they overdraft instead. With overdraft coverage off, checks bounce.

Can I dispute an overdraft fee?

You can ask your bank to reverse it, and some banks will if it is your first overdraft or if you have been a customer for a long time. But you cannot dispute it as fraud—you did spend the money, and the bank did cover it. Your only option is to ask for a courtesy reversal.

What happens if I never pay back an overdraft?

If your account stays negative for 30 to 60 days, your bank will close the account and send the negative balance to a collections agency. You will owe the money, and it will appear on your credit report. The bank will also report the closed account to ChexSystems, making it harder to open a new account elsewhere.