How this calculator works
Each item that clears without enough money can be charged a fee, and some banks add a daily fee while the account stays negative. Monthly cost = items × fee per item + days negative × daily fee; the calculator scales that to a year and to five years, and shows what one bad day costs under the bank's daily cap.
- Per month = items per month × fee per item + days negative × daily fee.
- Per year = per month × 12. Five years = per month × 60.
- Worst day = min(items that day, the bank's daily cap) × fee per item.
Worked example
With these inputs: overdraft or nsf items per month 2; fee per item $35; days a month the account stays negative 0; extended or daily overdraft fee $0.
The result is overdraft fees per year $840.00, with per month $70.00 and over five years $4,200.00. Most overdrafts come from timing — a bill clearing a day or two before payday. A standing cushion in checking stops the fee before it starts.
Find your bank's real numbers
Fees differ widely between banks and change over time, so use the figures in your own account agreement or fee schedule, not an average. Look for the overdraft item fee, the NSF (returned item) fee, any extended or sustained overdraft fee, how many fees can be charged per day, and whether small overdrafts under a set amount are exempt.
Your statement shows how often you've actually been charged. Count the last three months and divide by three for a fair "items per month".
Stopping the fees
Most overdrafts are timing problems: a bill clears a day before the paycheck lands. Three fixes cover most cases — keep a standing cushion in checking (the How Much to Keep in Checking calculator sizes it), move due dates so big bills fall after payday (see how to change bill due dates), and turn on low-balance alerts in your bank's app.
You can also ask your bank about opting out of overdraft coverage for debit card and ATM transactions; the CFPB explains how that works. Declined transactions have their own costs, so decide what suits you.
Sources
Frequently asked questions
How much do overdraft fees cost per year?
Multiply the items you overdraw each month by your bank's fee, then by 12. In the example — 2 items a month at $35 — that's $70 a month, $840 a year and $4,200 over five years.
What's the difference between an overdraft fee and an NSF fee?
An overdraft fee is charged when the bank pays an item even though you don't have the money. An NSF (non-sufficient funds) fee is charged when the bank declines or returns the item. Either can count as an item in this calculator; use the fee that applies.
What is an extended overdraft fee?
Some banks charge an extra fee if the account stays negative for several days, sometimes once and sometimes daily. Enter it as the daily fee with the number of days it applies, or leave it at zero if your bank doesn't charge one.
Can I get an overdraft fee refunded?
You can ask. Some banks waive a fee as a courtesy, especially an occasional one, but they don't have to. This calculator only estimates the cost; it can't predict what your bank will do.
How do I stop overdrafting?
Keep a cushion in checking, line up due dates with paydays, and set a low-balance alert. The How Much to Keep in Checking calculator works out the balance that covers one pay period of bills.