ACH Fundamentals Handbook: How ACH Payments Actually Work

Understand ACH. Explain It Clearly. Handle ACH Questions With More Confidence.

ACH payments are everywhere in banking—from payroll direct deposits and bill payments to recurring payments, bank-to-bank transfers, government payments, and business transactions.

But understanding what happens behind the scenes can be confusing, especially for employees who are new to banking or payments.

The ACH Fundamentals Handbook breaks the ACH process into practical, easy-to-understand lessons designed to help banking professionals build a stronger foundation in ACH.

Instead of simply memorizing terminology, you'll learn how an ACH payment actually moves from the Originator to the Receiver—and what happens along the way.

Inside the Handbook

You'll learn:

• What ACH is and how it fits into the broader payments ecosystem
• The difference between ACH, debit cards, checks, and wire transfers
• The five key participants in an ACH transaction
• Originator, ODFI, ACH Operator, RDFI, and Receiver roles
• ACH Credit vs. ACH Debit
• How an ACH entry moves from initiation through posting
• The difference between authorization, processing, settlement, and posting
• Why ACH payments aren't always instant
• Common ACH uses including payroll, bill payments, recurring payments, transfers, and business payments
• How to recognize when a customer's question may actually involve ACH
• A practical employee framework for investigating ACH questions

Put the Knowledge Into Practice

This isn't just a terminology guide.

The handbook includes real-world scenario labs covering situations banking employees may encounter, including:

Missing Payroll
Work through what to ask when a customer's expected direct deposit hasn't arrived.

Account Debit
Practice investigating an ACH debit a customer doesn't recognize.

Bank-to-Bank Transfer
Learn how to approach a transfer that hasn't reached the receiving bank.

You'll also get knowledge checks, an answer key with reinforcement, and an ACH-at-a-glance review to help reinforce the material.

Who Is This For?

This handbook is designed for:

• New bank and credit union employees
• Frontline banking professionals
• Branch and contact center employees
• Operations employees learning ACH
• Financial-services professionals who want a stronger ACH foundation
• Anyone interested in understanding how ACH payments work

What You'll Receive

ACH Fundamentals Handbook – 2026 Educational Training Edition

• 20-page digital handbook
• Visual ACH process diagrams
• Practical examples
• Employee troubleshooting framework
• Customer conversation examples
• Three scenario-based exercises
• Knowledge checks
• Answer key and reinforcement
• Quick-reference ACH summary

Build Knowledge You Can Actually Use

Understanding ACH helps you do more than recognize payment terminology.

It can help you ask better questions, explain payment timing more clearly, identify the parties involved in a transaction, and approach common ACH situations with a more structured process.

Learn today. Apply tomorrow. Make an impact.

Better Bankers. Brighter Futures.

Educational Disclaimer

This handbook is provided for general educational and training purposes. It is not legal, regulatory, compliance, or institution-specific operational advice. Financial institutions should follow their own policies and procedures, applicable Nacha rules, current regulations, and appropriate legal/compliance guidance.