GLOBAL PAYMENTS KNOWLEDGEISO 20022 / SWIFT / SEPA / MT / MX
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ISO 20022 ·

Legacy cross-border MT payment messages retired; coexistence ends

The MT–MX coexistence period for in-scope cross-border payment and cash-reporting instructions ended in November 2025. Legacy MT payment messages were retired and the in-flow MT/MX translation service was withdrawn, so in-scope traffic must now be native ISO 20022.

Contributor Shubham Mathure

ARCHIVED 01 MAR 2026 The coexistence cutover is complete; native ISO 20022 for cross-border payments is now business as usual rather than a live milestone.

From March 2023, Swift ran a coexistence period in which both legacy MT and new ISO 20022 (MX) messages were accepted for cross-border payments, and an in-flow translation service converted between the two so institutions could migrate at their own pace. The known risk during coexistence was truncation: the rich, structured data an ISO 20022 message can carry could be lost or shortened when it was translated down into the narrower MT format.

That period ended in November 2025. The legacy MT payment and cash-reporting messages were retired and the translation service was withdrawn, so in-scope cross-border traffic must now be sent natively in ISO 20022. Institutions that had leaned on translation rather than completing their own migration had to be fully native by the cutover — late movers faced rejected messages and payment delays rather than a quiet fallback.

Sources for this update2
  1. Official requirement

    ISO 20022 Standards (Swift ISO 20022 adoption programme) ↗ — Swift · end of MT–MX coexistence for cross-border payment instructions, November 2025

    Describes the Swift community's adoption of ISO 20022 for cross-border payments and reporting, including the CBPR+ migration and the end of MT-MX coexistence. · Checked 2026-07-12

    Programme milestones change over time; the coexistence period for in-scope cross-border payment instructions ended in November 2025. Check swift.com for the current timeline.

  2. Official requirement

    Cross-Border Payments and Reporting Plus (CBPR+) usage guidelines ↗ — Swift (CBPR+ working group) · CBPR+ coexistence timeline

    Defines how ISO 20022 messages (including pacs.008, pacs.009, pacs.002, pacs.004, and camt investigation messages) are used and validated for cross-border payments on the Swift network. · Checked 2026-07-12

    Full guidelines require MyStandards access; content here relies on public summaries. MT-to-CBPR+ translation rules are published on Swift's translation portal.