What average monthly balance means and why banks track it

Average monthly balance is the sum of your account balance on each day of the month, divided by the number of days in that month. Banks calculate it to decide whether you pay a monthly fee, earn interest, or may have access to for perks like free checks or ATM reimbursement.

The calculation matters because many checking accounts waive their monthly fee if you keep a minimum average balance — often $500, $1,000, or $2,500, depending on the account type. Some banks also use it to determine how much interest they pay you on the balance you hold. If your average falls below the threshold, you may owe a fee that month even if your balance was high on the last day.

Banks do this calculation automatically and report it on your statement. You do not have to calculate it yourself to avoid fees — but understanding how it works helps you predict whether you will hit the threshold and what your account will cost.

Key Takeaways

  • Average monthly balance is the total of your daily balances divided by the number of days in the month, and banks use it to determine fees and interest rates.
  • A single large deposit on the last day of the month will not raise your average if your balance was low for the rest of the month.
  • Your bank statement shows the average monthly balance they calculated, so you can verify it against your own records.
  • If you fall short of the minimum by a small amount, some banks will waive the fee if you contact them, though this is not may provide.
  • Keeping money in a separate savings account does not count toward your checking account average, even if the accounts are linked.

The step-by-step calculation method

To calculate your average monthly balance by hand, gather your account statements or transaction history for the month. Write down your balance at the end of each day — the balance after all deposits and withdrawals posted.

Add all 28, 29, 30, or 31 daily balances together. Then divide that sum by the number of days in the month. The result is your average monthly balance.

For example: if your daily balances for a 30-day month were $1,000, $1,050, $950, $1,100, and so on for all 30 days, and they added up to $30,600, your average would be $30,600 ÷ 30 = $1,020.

Most people do not need to do this math themselves — your bank calculates it and prints it on your statement. But if you want to predict whether you will hit a minimum balance threshold before the month ends, you can track your daily balance and do a rough calculation.

Why a high balance on one day does not may provide a high average

A common mistake is assuming that a large deposit near the end of the month will push your average above the minimum. It will not, unless your balance was already close to the threshold.

Imagine your account had a $500 balance for 29 days, then you deposited $5,000 on day 30. Your total for the month is ($500 × 29) + $5,500 = $19,500. Divided by 30 days, your average is $650. Even though you ended the month with $5,500, your average was only $650 because the balance was low for most of the month.

This is why banks use average balance instead of ending balance — it prevents people from moving money in just before the statement closes to avoid fees. If you want to keep your average high, you need to maintain a steady balance throughout the month, not spike it at the end.

How to find your average monthly balance on your statement

Your bank calculates and reports the average monthly balance on your checking account statement. Look for a line item labeled "Average Daily Balance," "Average Monthly Balance," or sometimes "Average Balance." It usually appears near the top or bottom of the statement, alongside other account summary information.

If you bank online, log into your account and open the most recent statement. The average balance is typically shown on the first page of the PDF or in a summary section. Some banks also display it in the account overview or dashboard without requiring you to open the full statement.

If you cannot find it on your statement, call your bank's customer service line or visit a branch. They can tell you what your average balance was for any month and explain how it affects your account fees or interest rate.

What happens if your average falls short of the minimum

If your average monthly balance drops below the minimum required to waive fees, your bank will charge you a monthly maintenance fee — typically $5 to $15, depending on the account. This fee posts to your account a few days after the statement closes.

The fee is automatic and applies even if you had a high balance on the last day of the month. Once the fee posts, it lowers your balance for the next month's calculation, which can make it harder to hit the threshold the following month.

Some banks offer a one-time courtesy waiver if you call and ask, especially if you have been a customer for a long time or if this is your first time falling short. There is no harm in asking, but do not count on it. The better strategy is to keep your balance steady throughout the month or switch to an account with no minimum balance requirement.

Accounts with no minimum balance requirement

If maintaining a high average balance is difficult, many banks offer checking accounts with no minimum balance and no monthly fee. These accounts typically do not pay interest on your balance, but they cost nothing to hold.

Online banks and credit unions often have no-fee checking options. Traditional banks like Chase, Bank of America, and Wells Fargo also offer basic checking accounts without minimums, though they may have other restrictions — such as a limit on the number of free withdrawals per month or a requirement to set up direct deposit.

Before switching accounts, compare the full cost of each option. A $10 monthly fee on an account that pays 0.01% interest may cost less than moving your money and updating your direct deposit, depending on your balance and how long you plan to stay with the bank.

How interest rates and average balance connect

Some checking accounts pay interest on your balance, and the amount they pay depends partly on your average monthly balance. Banks use the average balance to calculate how much interest to credit to your account each month.

For example, if your account pays 0.05% annual interest and your average monthly balance was $10,000, the bank calculates the monthly interest as ($10,000 × 0.05%) ÷ 12 months = roughly $0.42 for that month. The interest posts to your account a few days after the statement closes.

Higher average balances earn more interest, but the amounts are usually small unless your balance is very large. Most checking accounts pay little to no interest; savings accounts and money market accounts typically pay more. If earning interest is important to you, compare rates across banks before opening an account.

Frequently Asked Questions

Does money in my savings account count toward my checking account average balance?

No. Banks calculate average balance separately for each account. Only money in your checking account counts toward the checking account average, even if the accounts are linked or held at the same bank. If you need to hit a minimum, you must keep the money in the checking account itself.

What if my bank made an error in calculating my average balance?

Review your statement and add up your daily balances yourself to verify. If your calculation differs from the bank's, contact customer service with your math and ask them to review it. Banks do make mistakes, and they will correct them if you catch one. Request that any wrongly charged fees be refunded.

Can I move money between accounts to raise my average balance?

Moving money from savings to checking on the last day of the month will not help — only the balance in your checking account counts, and it only counts on the days it is actually there. To raise your average, you need to keep the money in checking for most of the month.

Do banks calculate average balance the same way?

Most banks use the same method — daily balances added up and divided by the number of days in the month. However, some banks may count balances at different times of day or handle pending transactions differently. Check your account agreement or ask your bank how they calculate it if you want to be precise.

What if I have multiple checking accounts at the same bank?

Each account is calculated separately. Your average balance in one checking account does not affect the fee on another. If you have two accounts and want to avoid fees on both, you must maintain the minimum in each one, or switch to accounts with no minimum requirement.