Guidance

Real Time Information internet submissions: 2026 to 2027 technical specifications

Real Time Information (RTI) Rules and Interface Management (RIM) artefacts and supporting technical specifications for software developers.

• From: HM Revenue & Customs
• Published: 7 August 2025
• Last updated: 16 September 2025 — See all updates

Documents

RTI RIM 2027 v1.0.zip

ZIP, 2.9 MB

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Changes between 2025 to 2026 and 2026 to 2027 RIM v1.0

ODT, 16.2 KB

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RTI data item guide 2026 to 2027 v1.0

ODT, 124 KB

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Details

Test service support from October 2025. Live service from March 2026.

Published 7 August 2025

Last updated 16 September 2025 + show all updates

1. 16 September 2025

   'RTI data item guide 2026 to 2027 v1.0' has been added.

2. 7 August 2025

   First published.