ACH Central

The place for all things ACH – from current rules to education.


Automated Clearing House (ACH) is a network of financial institutions that transmits electronic debits and credits throughout the U.S. Transactions include payroll, consumer bills, tax payments and refunds and many more payment services. ACH is a cost effective and timely way to move money.

The mission of ACH Central and the ACH Advisor newsletter is to keep credit unions up-to-date on ACH rules and regulations, processes to improve operational efficiency, deadlines, training opportunities and answers to their ACH questions.

Catalyst Corporate offers a full complement of ACH services, including ACH Origination, ACH Receipt, International ACH, Business ACH Origination, ACH Contingency Support and ACH Fraud Protection.

Additionally, a team of Accredited ACH Professionals provides training on ACH topics throughout the year, such as: 

  • ACH Rules 
  • ACH Audit Requirements 
  • Risk Management and Assessment
  • Returns and Exception Processing 

Same-Day ACH: Round 2 Changes to ACH Rules


The first three phases of Same-Day ACH are complete, and a second round of NACHA rule changes is on the horizon. Like the previous set of Same Day ACH rules, the next batch will be introduced in three phases, beginning in the fall of 2019 and concluding in the spring of 2021. Here are the basics:

Phase 1: Faster Funds Availability. As of September 20, 2019, Same Day credit funds submitted in the first processing window (8:30 a.m. CST) must be made available to the receiver by 1:30 p.m. (RDFI's local time). Funds from non-Same Day Credits must be available by 9 a.m. local time on the settlement date, as long as credits were made available to the RDFI by 5 p.m. on the previous day.

Phase 2: Increased SDA Dollar Limit. Starting March 20, 2020, the Same Day ACH per-transaction dollar limit will increase from $25,000 to $100,000.

Phase 3: Expanded SDA Access. Effective March 19, 2021 (extended from the original deadline of September 13, 2020), the Federal Reserve will add two additional hours to its day (until 3:45 p.m. CST) for submission of Same Day ACH transactions. Institutions may need to consult with their processors for specific origination/return cut-off times.

Be sure to check this website for the latest ACH information, news and updates.