Last reviewed: · Curated by Ohmyfin Organisation editorial.
MT103 and pacs.008 carry the same thing — a single customer credit transfer — but in two very different formats. MT103 is the legacy fixed-field SWIFT MT message. pacs.008 is the ISO 20022 XML successor.
Details
MT103 fields are short, position-coded and limited (e.g. field 70 only allows four lines of 35 characters for remittance information). pacs.008 carries the same data plus much richer remittance data, structured addresses, LEI codes and purpose-of-payment.
SWIFT migrated CBPR+ cross-border payments from MT103 to pacs.008 between March 2023 and November 2025. Most banks now generate both formats in parallel during the transition.
Either format can carry a UETR — Ohmyfin tracks both.
At-a-glance comparison
MT103 vs pacs.008 — side-by-side comparison
MT103
pacs.008
Standard
SWIFT MT (legacy)
ISO 20022 (modern)
Format
Fixed positional fields
Structured XML
Remittance info
Field 70: 4×35 chars
Up to 9,000 chars structured
Address data
Free text
Structured (street, city, country)
UETR
Field 121 (mandatory)
UETR element (mandatory)
Cut-over deadline
Phasing out by Nov 2025
Mandatory after Nov 2025
LEI support
No
Yes
Key facts
MT103: legacy, fixed fields, short data
pacs.008: ISO 20022 XML, structured, rich data
CBPR+ cutover: March 2023 → November 2025
Both carry the same UETR and route the same way
Frequently asked questions
Will MT103 disappear?
For cross-border CBPR+ traffic, yes — November 2025 is the cutover. Domestic-only MTs continue per local market timelines.
Related — more from payment system comparisons and beyond
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