What Is the Overdraft Fee Calculator?
An overdraft occurs when a transaction is paid even though your account balance is too low to cover it. Banks typically charge a flat fee for each item they cover (the per-item or "non-sufficient funds" fee) and may add an extended or "sustained" overdraft fee for every day the account remains negative. This calculator adds both charge types together so you can see the true cost of an overdrawn account.
How to Use It
Enter the number of overdraft items the bank covered, the fee charged per item, the number of days your account stayed negative, and any daily extended overdraft fee. The tool multiplies and sums these to show your total estimated fees, broken down by per-item charges and daily charges.
The Formula Explained
The calculation is straightforward:
$$\text{Total Fees} = \left(\text{Items} \times \text{Fee/Item}\right) + \left(\text{Days Negative} \times \text{Daily Fee}\right)$$
The first term covers each individual transaction the bank honored while you were short. The second term reflects ongoing penalties some banks apply for each day you don't bring the balance positive.
Worked Example
Suppose your bank covered 3 overdraft items at $35 each, and your account stayed negative for 5 days with a $7 daily extended fee. Per-item fees = \(3 \times \$35 = \$105\). Extended fees = \(5 \times \$7 = \$35\). Total = \(\$105 + \$35 =\) $140.
FAQ
Can overdraft fees be reversed? Yes — many banks will waive a fee on request, especially for first-time or rare overdrafts. It is always worth calling customer service.
What is the difference between an overdraft fee and an NSF fee? An overdraft fee is charged when the bank pays a transaction despite low funds; an NSF (non-sufficient funds) fee is charged when the bank declines it. Either way you can plug the per-item charge into this calculator.
Does this apply to my country? The math is universal, but fee structures and consumer-protection rules vary by bank and country. Use your own bank's published fee schedule for the input values.
