What Is an ACH Reversal? Deadlines, Fees, and Indemnification

An ACH reversal is a corrective electronic entry that pulls back a payment sent through the Automated Clearing House network when the original transaction contained a specific kind of error. The sender’s bank transmits a new entry that undoes the first one, but only within a short window and only for a short list of reasons set by Nacha, the network’s rule-making body. A reversal is not a refund, a chargeback, or a return, and it cannot be used to walk away from a payment you simply regret.

When You Can Reverse an ACH Payment

Nacha’s Operating Rules permit a reversal only when the original entry falls into one of these categories:

Duplicate payment — the same transaction was processed more than once.
Wrong dollar amount — for example, $10,000 sent instead of $1,000.
Wrong receiver — funds went to the wrong account, often from a transposed routing or account number.
Wrong timing — a debit posted earlier than intended, or a credit posted later than intended.

An originator may also reverse certain payroll credits tied to an employee’s termination or separation.

Contract disputes, buyer’s remorse, and dissatisfaction with goods or services are not permitted reasons. Using the reversal process outside the permitted categories can trigger Nacha enforcement against the originating bank and, in serious cases, suspension of the originator from the ACH network.¹

The Five-Day Deadline

The reversing entry must reach the receiving bank within five banking days after the settlement date of the original transaction. Banking days are weekdays the Federal Reserve is open; Saturdays, Sundays, and federal holidays do not count. If the original payment settles on a Monday, the window generally runs through the following Monday.

Miss the deadline and the reversal option is gone. From that point your remedies are a voluntary refund from the receiver or, if it comes to it, civil court.

The originator also has to notify the receiver about the reversal, no later than when the reversing file is transmitted. The method can vary; the timing cannot.

How to Request a Reversal

Before you call your bank, pull the details of the original transaction. The reversing entry has to match the original precisely, so bring:

The trace number — a fifteen-digit identifier the originating bank assigned to the entry. The first eight digits are the bank’s routing number; the last seven uniquely identify the item. It typically appears on your transaction receipt or in your accounting software.²
The exact dollar amount of the original transaction.
Both account numbers, exactly as they appeared on the original entry.
The Company ID and Standard Entry Class (SEC) code from the original batch header — these must be identical in the reversal file.

You also have to assign a reason code so the receiving bank understands what is being corrected. The reversal file itself has to carry the word “REVERSAL” in all capitals in the Company Entry Description field. That label tells every bank handling the file that it is a corrective entry rather than a new payment.¹

Once submitted, the reversal moves through the same network as the original:

You submit the request to your bank (the Originating Depository Financial Institution, or ODFI).
Your bank formats and transmits the reversing entry to the ACH operator (the Federal Reserve or the Electronic Payments Network).
The operator routes it to the receiving bank (the Receiving Depository Financial Institution, or RDFI).
The receiving bank attempts to pull the funds from the receiver’s account and send them back.

Routing usually takes one to two business days from submission. If the money is still there, the reversal completes and funds return to the originator.

When a Reversal Does Not Succeed

The receiving bank is not obligated to honor every reversal. It can dishonor the entry if the receiver’s account has insufficient funds, the account is closed, or the reversal does not comply with Nacha’s rules. Receiving banks use specific return codes to reject improper reversals: R11 for consumer accounts and R17 for non-consumer accounts.¹

A dishonored reversal does not get the money back automatically. The originator may need to ask the receiver for a voluntary refund or pursue the funds through civil court.

The Sender’s Indemnification Obligation

An originator that initiates a reversal takes on an indemnification obligation — the originator is responsible for losses the receiving bank incurs because of the reversal. For federal government agencies, this liability is capped by regulation at the amount of the original entry.³ For private-sector originators, the Nacha Operating Rules impose a similar indemnification requirement. Filing a reversal is not risk-free: if it turns out to be improper, the originator bears the financial consequences.

How a Reversal Differs From a Return

Reversals and returns both move money back toward the sender, but the mechanics differ. A reversal is started by the sender’s bank to fix the sender’s error. A return is started by the receiving bank when it cannot complete the transaction — a closed account, insufficient funds, or a dispute by the account holder, for example. The deadlines, procedures, and permitted reasons are not the same, so the right path depends on which side the problem sits on.

If You’re an Individual: Regulation E

If an unauthorized or erroneous ACH transaction hits your personal account, you have federal protections beyond the Nacha reversal rules. Regulation E, enforced by the Consumer Financial Protection Bureau, caps your liability based on how quickly you report the problem: generally $50 if you notify your bank within two business days of learning of an unauthorized transfer, rising to $500 if you report between two business days and 60 days after your statement is sent, and potentially the full amount for unauthorized transfers after 60 days that could have been prevented by earlier notice.⁴ State law or your account agreement can set lower limits, in which case the lower limit applies.

Once you report an error, the bank generally has 10 business days to investigate and resolve it, with the option to take up to 45 days if it provisionally credits your account during the review. For point-of-sale debit card transactions, transfers not initiated in the United States, and transfers within the first 30 days of opening the account, the extended period runs to 90 days.⁵

You can also place a stop payment order on a recurring ACH debit by notifying your bank at least three business days before the next scheduled payment. Oral orders are allowed, though your bank may require written confirmation within 14 days. Stopping the payment does not cancel your underlying contract with the biller.⁶

Penalties for Misusing the Reversal Process

Nacha pursues improper reversals through its National System of Fines and its arbitration process. Violations are tiered. An “egregious violation” involves willful or reckless conduct affecting at least 500 entries or totaling at least $500,000. The ACH Rules Enforcement Panel can classify an egregious violation as Class 2 or Class 3. A Class 3 violation carries fines of up to $500,000 per occurrence, and Nacha can direct the originating bank to suspend the originator from the network. Nacha may also report Class 3 violations to ACH operators and federal regulators.¹

What a Reversal Costs

Fees vary by institution and account type. Some banks fold ACH reversals into their standard business account services; others charge a per-item fee. If a reversal hits your account when the balance can’t cover it, you may also see an overdraft or returned-item charge. Ask your bank for its fee schedule before initiating a reversal so the costs don’t surprise you.

1
Nacha. ACH Network Rules: Reversals and Enforcement
2
U.S. Department of the Treasury Bureau of the Fiscal Service. Trace Number
3
eCFR. Title 31 Section 210.6 – Agencies
4
Consumer Financial Protection Bureau. Section 1005.6 Liability of Consumer for Unauthorized Transfers
5
Consumer Financial Protection Bureau. Section 1005.11 Procedures for Resolving Errors
6
Consumer Financial Protection Bureau. How Can I Stop a Payday Lender From Electronically Taking Money Out of My Bank or Credit Union Account