The minimum balance is the lowest amount of money a bank requires you to keep in your account at all times to avoid a monthly fee
Most banks set a minimum balance requirement—often between $100 and $2,500, though some accounts have none. If your balance drops below that number on any day of the month, the bank charges you a fee, usually $10 to $35. The fee hits your account automatically; you do not have to do anything to trigger it. Some banks check your balance once a day, others check it multiple times, and a few calculate an average balance across the whole month. The exact rule depends on which bank and which account type you hold.
The purpose of the minimum balance is straightforward: the bank wants to may support you are keeping enough money there to make the account worth their cost to maintain. A savings account that holds $50 costs the bank more to operate than it generates in interest or fees, so they discourage it with a penalty.
Key Takeaways
- Minimum balance requirements range from $0 to $2,500 or more depending on the account type and bank, and falling below it triggers a monthly fee.
- The fee is charged automatically if your balance dips below the minimum on even a single day, unless your bank uses an average-balance calculation method.
- Some banks check your balance daily, others weekly or monthly, so the timing of deposits and withdrawals matters to whether you trigger the fee.
- Online banks and credit unions often have lower or zero minimum balance requirements than traditional brick-and-mortar banks.
How banks measure your balance against the minimum
Banks use three main methods to determine whether you have met the minimum balance requirement. The most common is the daily balance method: the bank checks your account balance at the end of each business day, and if it falls below the minimum even once during the month, you owe the fee. This means a single large withdrawal can trigger the charge, even if you deposit money back the next day.
The second method is the average daily balance. The bank adds up your balance at the end of each day for the entire month, then divides by the number of days. If that average is below the minimum, you pay the fee. This method is gentler because a temporary dip does not automatically cost you—you have to stay below the threshold on average.
The third method, less common, is the minimum daily balance. The bank looks at the lowest balance your account reached during the month and compares it to the requirement. If that lowest point is below the minimum, the fee applies. This is the strictest version.
Your account documents or online banking portal should state which method your bank uses. If you cannot find it, call the bank directly and ask: "Do you use daily balance, average daily balance, or minimum daily balance?" The answer changes whether you can safely withdraw money mid-month.
Minimum balance requirements by account type
Savings accounts at traditional banks typically require $100 to $500 minimum balance. Money market accounts usually ask for $2,000 to $10,000 because they offer higher interest rates and more withdrawal flexibility. Basic checking accounts often have no minimum or a very low one ($25 to $100), while premium checking accounts tied to investment services can require $5,000 or more.
Online banks and credit unions tend to have lower minimums or none at all. An online savings account might have a $0 minimum because the bank's operating costs are lower without physical branches. Credit unions, which are member-owned rather than profit-driven, often waive minimums entirely or set them at $25.
The account name does not always tell you the requirement. Two banks might both call an account a "savings account," but one requires $500 minimum and the other requires nothing. You have to check each bank's specific terms.
What happens when your balance falls below the minimum
The fee is charged automatically, usually on the last business day of the month or the first business day of the next month. The charge reduces your balance further, which can trigger additional fees if you are already close to the minimum. For example, if your minimum is $500, your balance is $480, and the bank charges a $25 fee, your new balance becomes $455—now even further below the requirement.
Some banks will charge the fee only once per month, even if your balance stays below the minimum for the entire month. Others charge it every day or every week the balance is low. Read your account agreement or call to confirm the frequency at your bank.
The fee does not affect your credit score directly because it is an internal bank charge, not a debt you owe. However, if the fee causes your account to go negative and you do not pay it back, the bank may close your account and report you to ChexSystems, a banking history database that other banks check before opening new accounts for you.
How to avoid the minimum balance fee
The simplest approach is to keep your balance above the minimum at all times. If your bank uses the daily balance method, this means never letting it drop below the threshold, even temporarily. If your bank uses average daily balance, you have more flexibility—you can dip below for a few days as long as the monthly average stays above the minimum.
If you cannot maintain the minimum, switch to an account with a lower requirement or no requirement. Many online banks offer savings accounts with $0 minimum and no monthly fees. Credit unions often have the same. The tradeoff is usually a lower interest rate, but if you are paying $10 to $35 per month in fees, that tradeoff is worth it.
Some banks offer ways to waive the minimum balance fee if you meet other conditions: setting up direct deposit, maintaining a linked checking account, or using their debit card a certain number of times per month. Ask your bank whether any of these options explore to your account.
Minimum balance requirements across different bank types
| Bank Type | Typical Minimum Balance | Monthly Fee if Below Minimum |
|---|---|---|
| Traditional bank (savings) | $100–$500 | $10–$25 |
| Online bank (savings) | $0–$100 | $0–$10 |
| Credit union (savings) | $0–$100 | $0–$15 |
| Money market account | $2,000–$10,000 | $15–$35 |
| Premium checking | $5,000+ | $20–$40 |
These ranges vary by institution and change over time. The figures above reflect common practices as of now, but your specific bank may differ. Always check your account agreement or contact your bank directly for the exact requirement and fee amount.
Frequently Asked Questions
Does a minimum balance requirement mean I cannot withdraw money?
You can withdraw money, but if your balance drops below the minimum, you will be charged a fee. The bank does not freeze your account or prevent the withdrawal. However, if you withdraw enough to go negative, the bank may decline the transaction or charge an overdraft fee on top of the minimum balance fee.
What is the difference between minimum balance and overdraft protection?
Minimum balance is a requirement you must maintain to avoid a monthly fee. Overdraft protection is a separate service that covers withdrawals that would make your account negative. You can have one, both, or neither. Overdraft protection costs money too, so it is not a solution to a low minimum balance problem.
Can a bank change my minimum balance requirement?
Yes. Banks can change account terms with notice, usually 30 days. They must notify you in writing or through your online banking portal. If the new minimum is higher and you cannot meet it, you can close the account and move to another bank without penalty.
Do savings accounts at online banks really have no minimum balance?
Many do, but not all. Some online banks have zero minimum and zero monthly fees. Others have a small minimum ($25 to $100) or charge a fee if you do not maintain a certain balance. Check the specific bank's terms before opening an account.
If I have multiple accounts at the same bank, do they count toward one minimum balance?
No. Each account is separate. A $500 minimum on your savings account and a $500 minimum on your money market account means you need $1,000 total across both accounts. Some banks offer linked accounts or relationship pricing that waives minimums if you maintain a certain total balance across all your accounts with them, but this is not standard.