The State of the ACH Network: Growth, Rules, and What Comes Next

Published on April 15, 2026




AUTHOR

Eric Wester, AAP, AFPP, APRP, NCP
Director of Member Services
 

The ACH Network continues to be a critical piece of the U.S. payments ecosystem, moving trillions of dollars each year while adapting to new use cases, technologies, and expectations. As the network grows in both scale and complexity, staying informed has never been more important. Changes in consumer behavior, evolving fraud trends, and continued revisions to the Nacha Operating Rules all shape how participants interact with the network and manage compliance.

In this article, we will take a closer look at the current state of the ACH Network. We will examine recent volume and performance trends, highlight upcoming revisions to the Nacha Operating Rules, and explore what organizations should be thinking about as they plan for the future. Whether you support operations, risk, compliance, or product strategy, understanding where ACH is today helps prepare for what comes next.

ACH Network Volume and Growth Trends
The ACH Network continues to demonstrate steady and meaningful growth. In 2025, overall ACH Network payment volume increased nearly 4.9 percent year over year, reaching 35.2 billion payments. The network processed approximately 141 million transactions on average per day, underscoring the essential role ACH plays in everyday financial activity.

The value of ACH payments also saw strong growth. In 2025, total ACH payment value reached $93 trillion, representing a 7.9 percent increase compared to 2024. This growth reflects not only higher transaction counts, but also the expanding use of ACH for larger-dollar payments across a wide range of use cases.

Same Day ACH continues to be a driver of network momentum. In 2025, Same Day ACH volume reached 1.45 billion payments, with a total value of $3.92 trillion. From 2024 to 2025, Same Day ACH transaction volume grew 16.7 percent, while the value of those payments increased 21.4 percent. These figures highlight the growing demand for faster settlement and the confidence participants place in Same Day ACH for critical payments.

Recent and Upcoming Revisions to the Nacha Operating Rules
As ACH fraud risks continue to evolve, recent revisions to the Nacha Operating Rules place a stronger emphasis on proactive monitoring and stronger risk management. UMACHA staff have spent considerable time working with members who are refining their processes and procedures to meet these new requirements.

A significant focus of the recent rule changes is strengthened fraud monitoring obligations for multiple network participants. The updated requirements cover fraud monitoring by Non-Consumer Originators, Third-Party Service Providers, Third-Party Senders, and ODFIs, as well as ACH credit monitoring by RDFIs. These rules were intentionally introduced through a phased approach to allow participants time to adequately prepare.

For RDFIs, ACH credit monitoring requirements become effective in two phases. Phase one took effect on March 20, 2026, and applied to RDFIs that had an annual ACH receipt volume of 10 million or greater ACH transactions in 2023. Phase two becomes effective June 19, 2026. Because that date falls on a holiday, the practical effective date is June 22, 2026, at which point all remaining RDFIs must be compliant, regardless of volume.

The fraud monitoring requirements for Non-Consumer Originators, Third-Party Service Providers, Third-Party Senders, and ODFIs followed a similar phased timeline. Phase one was effective March 20, 2026, and applied to all ODFIs, regardless of their origination volume. It also applied to Non-Consumer Originators, Third-Party Service Providers, and Third-Party Senders with an annual ACH origination volume of 6 million or greater ACH transactions in 2023. Phase Two, which becomes effective June 19, 2026, with a practical effective date of June 22, 2026, covers all remaining Non-Consumer Originators, Third-Party Service Providers, and Third-Party Senders.

To support members as they navigate these changes, UMACHA offers a complimentary resource that provides a detailed overview of the fraud monitoring requirements along with practical compliance considerations for each participant role. Members can access this publication within the ACH FAQs by selecting “Risk Management/Fraud Monitoring” and downloading the “2026 Risk Management Rule Change” document.

Additional rule changes are also scheduled for 2026 and will require operational awareness, including updates to funds availability requirements for non-Same Day ACH credit transactions. This revision eliminates the existing 5:00 p.m. local time receipt condition when determining funds availability requirements. Under the revised rule, funds availability will be required at 9:00 a.m. local time on Settlement Date for all non-Same Day ACH credits.

Finally, Nacha has revised the definition of an International ACH Transaction (IAT). This update is intended to provide greater clarity and consistency in determining whether a transaction should be classified as an IAT, helping participants apply the correct formatting, screening, and compliance requirements.

Revisions to the Nacha Operating Rules Effective in 2026