Nacha Operating Rules - New Rules
The Nacha Operating Rules are the foundation for every ACH payment. By defining the roles and responsibilities of financial institutions and establishing clear guidelines for each Network participant, the Rules ensure that millions of payments occur smoothly and easily each day. All Rules are displayed by effective date.
Access Complimentary Rules Webinar Recordings
Feb. 5, 2026 Recording April 19, 2024 Recording
Click here for a list of approved rule changes and implementation dates
RISK MANAGEMENT TOPICS – (Fraud Monitoring Phase 2)
These Rule amendments related to monitoring for fraud become effective on June 19, 2026 and are part of a larger Risk Management package intended to reduce the incidence of successful fraud attempts and improve the recovery of funds after frauds have occurred. NOTE: As June 19 is a federal holiday, the practical effective date for these two rules will be the next banking day – Monday, June 22, 2026. All affected parties are encouraged to become compliant with these rules as soon as possible, but no later than June 22, 2026. This applies to all references to June 19, 2026, which follow.
Registration of IAT Contacts in the ACH Contact Registry
This Rule will require a Participating DFI to register their IAT- handling contact with either:
The name, title, email address, and phone number for at least one primary and one secondary contact person for the area of responsibility; or
Department contact information that includes an email address and a working telephone number.
Expanding Same Day ACH
This rule expands access to Same Day ACH by allowing Same Day ACH transactions to be submitted to the ACH Network for an additional two hours every business day. The new Same Day ACH processing window became effective on March 19, 2021.
Learn more about Same Day ACH with our Resource Center.
Supplementing Fraud Detection Standards for WEB Debits
The WEB Debit Account Validation Rule became effective March 19, 2021. The rule was originally approved by Nacha members in November 2018 to become effective January 1, 2020.