Finance · Payments

ACH (United States)

Reference entry · last updated September 9, 2026

The Automated Clearing House (ACH) network is a US electronic payment network that processes batches of credit and debit entries between financial institutions. Nacha sets its operating rules; FedACH and EPN operate its processing services.[1][2]

1. First principles: credit and debit entries

An ACH credit pushes funds from the originator’s account toward another account, as in payroll. An ACH debit pulls funds from an account under authorization, as in an agreed bill payment. Credit and debit describe the direction of the entry.[1]

ACH carries batches of payment instructions. Clearing processes those instructions between institutions; settlement transfers the corresponding value. Common uses include direct deposit, consumer bills, and business payments.[2]

2. Participants and operators

An ACH transaction has an originator, financial institutions, an operator, and a receiver. The roles apply to credits and debits, so the receiver of an entry is not always the person receiving money.[1]

Originator: initiates an authorized ACH entry.
Originating Depository Financial Institution (ODFI): submits entries on the originator’s behalf.
ACH operator: sorts and delivers entries between financial institutions.
Receiving Depository Financial Institution (RDFI): receives entries and posts them to the receiver’s account.
Receiver: the account holder whose account is credited or debited.

Nacha administers the operating rules. The Federal Reserve’s FedACH and The Clearing House’s Electronic Payments Network (EPN) process ACH transactions. EPN exchanges transactions with FedACH so institutions served by different operators can exchange payments.[1][2]

3. Processing and settlement timing

ACH credits can settle on the same banking day, the next banking day, or in two banking days. ACH debits can settle on the same or next banking day. The available timing depends on the entry, its effective date, and when it reaches processing.[3]

A customer’s submission time is separate from an operator’s deadline. For example, FedACH SameDay processes an eligible item on the current processing day when it arrives by a same-day deadline and is not future-dated. Bank submission cutoffs and account posting are additional steps in the payment path. The settlement date alone does not establish an exact customer crediting time.[4]

4. Same Day ACH and its limit

Same Day ACH adds settlement opportunities within a banking day. It uses ACH batch processing and remains subject to eligibility rules and deadlines. FedACH excludes international ACH transactions (IAT), automated enrollment entries (ENR), and items above the applicable same-day dollar limit.[4]

As of September 9, 2026, the Same Day ACH limit is $1 million per payment. Nacha has announced an increase to $10 million effective September 17, 2027. This is a limit for same-day eligibility, not a network-wide cap on all ACH payments.[5]

5. Returns and reversals

A return sends an entry back for a reason allowed by the network’s rules, such as insufficient funds or an account problem. A reversal corrects a qualifying error in an originated entry. Nacha limits reversals to specified circumstances, including duplicate entries and certain incorrect payment details.[6]

A reversal is not a general right to cancel a completed payment or undo a fraud loss. It must meet the applicable rules, and recovery can depend on whether funds remain available. Settlement, the right to return an entry, and successful recovery of money are separate questions.[6]

6. Instant payments and Philippine terminology

FedNow handles individual payments in near real time, with immediate end-user access to funds and interbank settlement available 24 hours a day, every day. Same Day ACH uses scheduled batch processing. A same-day settlement date therefore does not describe the same service as an instant payment.[7][4]

BSP uses automated clearing house for a multilateral agreement governing a Philippine payment stream under NRPS. That use includes arrangements with different processing models. InstaPay belongs to this Philippine framework; the abbreviation alone does not make it part of the US ACH network or imply US ACH timing and return rules.[8]

7. See also

8. References

Sources checked September 9, 2026.

Nacha. How ACH works.
The Clearing House. Electronic Payments Network (EPN).
Nacha. Significant majority of ACH payments settle in one business day or less.
Federal Reserve Financial Services. FedACH SameDay Service.
Nacha. Same Day ACH payment limit to increase to $10 million (April 27, 2026).
Olivia Maciel, Nacha. Second Chance: Understanding ACH Reversals (August 6, 2026).
Federal Reserve Board. FedNow Service: Additional questions and answers.
Bangko Sentral ng Pilipinas. Circular No. 980: National Retail Payment System framework (2017).