A credit memo in banking is an entry your bank posts to your account to increase your balance through an internal adjustment, rather than through an incoming deposit from someone else. Banks use these entries to reverse fees, fix posting errors, pay interest, and issue provisional credits while they investigate disputed transactions. Because the entry originates inside the bank, the money is usually available right away once an officer authorizes it.
Why Your Bank Issued One
A handful of situations account for almost every credit memo you’ll see.
A Fee Was Reversed
When your bank waives an overdraft or non-sufficient funds (NSF) charge, whether because you asked or because the fee was assessed in error, the refund posts as a credit memo. Overdraft fees averaged roughly $27 per transaction as of 2025, though some banks still charge as much as $37 each.1Consumer Financial Protection Bureau. Overdraft/NSF Revenue in 2023 Down More Than 50% Versus Pre-Pandemic Levels
The Bank Corrected an Error
If a deposit posted to the wrong account, a transaction was deducted for the wrong amount, or a bookkeeping mistake shorted your balance, the fix comes in as a credit memo restoring the money.
Interest Was Paid
Interest on savings accounts, CDs, and interest-bearing checking usually posts monthly or quarterly as a credit memo. The dollar amount may be small, but the format on your statement is the same.
You Filed a Dispute
When you report an unauthorized or incorrect electronic transaction, the bank may credit your account provisionally while it investigates. Those provisional credits appear as credit memos, and they come with rules of their own.
How to Spot a Credit Memo on Your Statement
Credit memos show up in the deposits or adjustments section of your statement, labeled differently from standard deposits so it’s clear the entry is an internal adjustment. Common abbreviations include CM, CR MEMO, MEMO CR, and ADJ. The description usually contains a short reason code or internal case number instead of a payer name.
In online and mobile banking, the entry may appear first with a vague label like “Memo Credit” or “Credit Adjustment” and pick up a fuller description overnight when the bank runs its batch processing. If you don’t recognize an entry, give it a business day to update, then match it against any dispute you filed, fee reversal you requested, or interest you were expecting. Keeping a short list of promised adjustments makes this easy.
Dispute Credits Under Regulation E
Regulation E, the federal rule implementing the Electronic Fund Transfer Act, sets specific timelines when you report an error on an electronic transaction. Once you notify the bank, it has 10 business days to investigate. It can extend that to 45 days, but only if it provisionally credits your account for the disputed amount within the first 10 business days.2Consumer Financial Protection Bureau. 12 CFR Part 1005 (Regulation E) – Section 1005.11 Procedures for Resolving Errors That provisional credit is the credit memo on your statement.
The investigation window stretches to 90 days instead of 45 in three situations: the transfer was international, it was a point-of-sale debit card transaction, or it occurred within 30 days of your first deposit to a new account.3eCFR. 12 CFR 1005.11 – Procedures for Resolving Errors
If the bank decides no error occurred, or that the error was different from what you reported, it can reverse the provisional credit and debit the amount back out. Before that reversal, it has to send you a written explanation and tell you the date and amount of the debit. For five business days after that notice, it also has to honor checks and preauthorized payments without charging overdraft fees, giving you time to adjust. If the dispute goes in your favor, the provisional credit simply stays put and becomes permanent.2Consumer Financial Protection Bureau. 12 CFR Part 1005 (Regulation E) – Section 1005.11 Procedures for Resolving Errors
The 60-Day Deadline for Reporting Errors
Regulation E gives you 60 days from the date the bank sends the periodic statement to report an error shown on it.2Consumer Financial Protection Bureau. 12 CFR Part 1005 (Regulation E) – Section 1005.11 Procedures for Resolving Errors For unauthorized transfers involving a lost or stolen access device such as a debit card, your liability depends on how fast you act:
- Within 2 business days of learning of the loss or theft, your liability is capped at $50.
- After 2 business days but within 60 days of the statement, liability can reach $500.
- After 60 days, you can be liable for the full amount of any unauthorized transfers that happen after the 60-day mark, with no cap.4Consumer Financial Protection Bureau. 12 CFR Part 1005 (Regulation E) – Section 1005.6 Liability of Consumer for Unauthorized Transfers
Review each statement as it arrives and flag anything unfamiliar right away.
When a Credit Memo Can Be Taken Back
A credit memo isn’t always permanent. Beyond the dispute reversal above, the Uniform Commercial Code lets a collecting bank charge back a provisional credit it gave you for a deposited item, such as a check, if the bank never receives final payment. That right applies even if you’ve already spent the money.5Cornell Law School – Legal Information Institute (LII). UCC 4-214 Right of Charge-Back or Refund; Liability of Collecting Bank; Return of Item
The same principle covers mistaken credits. If the bank posts someone else’s deposit to your account, it can reverse the entry once it catches the error. Spending money you know was credited by mistake doesn’t give you a right to keep it. If a credit memo suddenly boosts your balance and you can’t tie it to anything, call the bank before you rely on the funds.
Do You Owe Tax on a Credit Memo?
It depends on why it was issued. Interest posted through a credit memo is taxable income, and you owe federal income tax on it regardless of the amount. Your bank has to send you a Form 1099-INT only if it paid you $10 or more in interest for the year, but you’re required to report the income even if no 1099-INT arrives.6Internal Revenue Service. About Form 1099-INT, Interest Income
A credit memo that reverses a fee or corrects an error is not taxable. It’s a refund of money that was already yours.
Credit Memo vs. Debit Memo
A credit memo increases your balance; a debit memo decreases it. Banks use debit memos for the mirror situations: monthly maintenance charges, overdraft penalties, correcting a deposit that was credited for too much, or clawing back a provisional credit after a dispute is resolved against you. If you see “DM” or “DB MEMO” next to a reduction in your balance, that’s the opposite of a credit memo, and the bank has taken money out rather than put it in.