ACH credit or debit? Follow who starts it.

“Bank transfer” describes an experience, not a complete set of instructions. To understand an ACH payment, start with two arrows: the instruction and the money. They do not always point in the same direction.

This is a plain-language U.S. ACH introduction, not an authorization template or a complete account of network rules.

The two basic directions

In an ACH credit, the originator initiates a push of funds to the receiver's account. Payroll is a familiar example. In an ACH debit, the originator initiates a collection from the receiver's account. An authorized insurance-premium collection is a common example. These terms follow the ACH entry, not whether you personally think of the transaction as income or spending. Nacha's developer guide sets out the distinction.

The same guide names the originating bank, receiving bank and ACH operator. The originating bank sends the entry into the network; the receiving bank receives it. “Receiving” therefore does not automatically mean “getting richer”: the receiving account can be debited.

Put a name beside each arrow

Take a hypothetical $85 bill. In one arrangement, you tell your bank to send an ACH credit to a business. In another, you authorize the business to collect $85 by ACH debit. The intended economic result is similar, but who starts the entry differs.

For either arrangement, write down:

This is a reading worksheet, not a claim that every bank bill-pay button uses ACH. Ask the provider which method it actually selected.

Permission is part of the payment

Nacha's guide says originators must obtain the appropriate authorization; its form depends on the entry type. Do not assume that knowing account details is the same as having permission. Keep the authorization you actually accepted, including how future collections can be stopped. A consumer account and a business account should not be treated as interchangeable legal situations.

For a useful personal record, add the approved purpose, whether the amount can vary, whether the instruction repeats, and where the provider tells you to change it. Those questions make the agreement easier to inspect without substituting this article for it.

When something does not arrive

Bring the reference and account details to the institution or organization involved. Nacha's consumer FAQs explain that Nacha does not process individual payments or have access to their records. For a missing direct deposit, the sender is a useful starting point; an unrecognized unauthorized debit should be reported promptly to your bank.

Ask for the current status, whether an entry was returned, and what reference the other party can use to investigate. Keep the answer with your worksheet. “Submitted,” “received” and “available” are questions to resolve, not interchangeable conclusions.

Sources and next step

Both linked Nacha sources were reviewed on 19 September 2026. The consumer FAQ is dated 12 July 2022; the developer guide is undated. Compare ACH with a wire or follow the ACH diagram.