ACH File Converter

ACH Addenda Builder

Review and edit payment-related addenda information.

1

Source ACH/NACHA file

Validate the entry and addenda pair

Browse all tools

Continue with a tool that fits the next step in this workflow.

When payment-related information belongs in addenda

Use addenda for supported remittance or descriptive information defined by the SEC code and trading-partner agreement, not as a substitute for required Entry Detail fields.

Fields that connect addenda to an entry

Entry indicator

The parent Entry Detail Record signals whether addenda follow.

Sequence and trace linkage

Addenda sequence values and the related trace suffix keep records associated with the intended payment.

Capacity differs by SEC code

PPD and CCD generally allow one optional addenda record, while CTX can support extensive remittance data. Return and NOC addenda use different type codes and meanings.

Content checks before saving

  • Confirm the permitted addenda type.
  • Keep text within fixed-width limits.
  • Do not expose unnecessary sensitive data.
  • Reconcile addenda counts and indicators.

Questions about ACH addenda records

Can every ACH entry have addenda?

Support depends on the SEC code, transaction, and receiving agreement.

How many addenda can CCD or PPD use?

They generally support one optional payment-related addenda record per entry.

Is CTX better for invoice detail?

CTX is designed for corporate payments needing richer remittance information, subject to partner support.

Which authoritative sources support this page?

Technical explanations are checked against these primary sources. Bank-specific requirements can be narrower than general format guidance.

  1. Nacha ACH File Details — Official record-field guidance, including Batch Header SEC codes and addenda capabilities.
  2. Nacha ACH File Overview — Official explanation of files, batches, entries, controls, and batch grouping.
  3. Nacha: How ACH Works — Official overview of ACH participants, consumer and corporate payments, and authorization responsibilities.
  4. Nacha Operating Rules Topics — Current rule changes and implementation topics published by Nacha.

Sources reviewed August 20, 2026. Nacha owns and maintains the linked materials.