What Is a Nonsufficient Funds, or NSF, Fee?

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What is a nonsufficient funds, or NSF, fee?
When a bank declines a payment due to the customer having inadequate funds in an account, the customer is charged a nonsufficient funds fee, or NSF fee. A “bounced check fee” is a type of NSF fee that arises when a customer writes a check against an account that doesn't have the money to cover the check amount or when someone tries to deposit a check and the check writer does not have enough funds in their account to cover it. There can sometimes be criminal or civil consequences for writing bad checks, so customers should try to recover from these fees as quickly as possible.
» Learn more about bounced check fees
NSF fees could also apply to Automatic Clearing House, or ACH, transactions that are rejected due to lack of funds. For example, you could be charged an NSF fee if you set up automatic bill pay from your checking account and don't have enough money to cover the bill.
What's the difference between NSF fees and overdraft fees?
NSF fees and overdraft fees are charged when a customer lacks the funds in their account to cover a check, transaction or payment. In contrast to overdraft fees, typically assessed after a transaction has been processed and a customer's account is left with a negative balance, NSF fees are levied after a bank rejects a transaction because the customer doesn't have enough money. When customers opt out of overdraft protection, they are likely to be charged an NSF fee when they write a check, make a debit card transaction or make an electronic payment that they lack the funds to cover.
Here's an example of how NSF fees might work compared with overdraft fees. Say you have $100 in your account, but you try to write a check for $120. You haven't opted-in to overdraft protection, so the check bounces and your bank charges you $34 — the average cost of an NSF fee. Your account balance is now $66 ($100-$34).
Let's look at the same scenario for an overdraft fee. Your $120 check doesn't bounce, but now your account total is -$20 ($100-$120). However, you don't have overdraft protection, so your bank charges you a $35 overdraft fee — the average cost. So now your account balance is -$55 (-$20-$35).
How to avoid an NSF fee
If you're concerned about NSF fees, you may want to opt-in to overdraft protection if your bank offers it. Overdraft protection can take the form of free overdraft protection transfers from a linked savings account, overdraft lines of credit or grace periods. In addition, some financial institutions offer a buffer, where you can overdraft up to a certain amount, such as $100, and you won't be charged a fee. Instead, you'll just be expected to replenish your account as soon as possible.
Other ways to avoid an NSF fee or overdraft fee would be to set up low account balance alerts or to look for other banks that offer more flexible overdraft policies.
