UK NCSC migration timeline: dates and requirements
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The UK NCSC's timeline, published 2025-03-20, sets three phases: complete discovery and planning by 2028, complete high-priority migrations by 2031, and complete the migration of all systems, services, and products by 2035.

Issued by: UK National Cyber Security Centre
Date: 2025-03-20
Status: Published guidance
Milestones: 2028: Discovery complete: cryptographic inventory and migration plan | 2031: High-priority migrations complete | 2035: Migration complete for all systems, services, and products
Source: https://www.ncsc.gov.uk/guidance/pqc-migration-timelines

Source page: https://pqaudit.org/timelines/uk-ncsc-pqc-timeline/
Compiled by: PQC Audit Index editors (https://pqaudit.org/about/)
Last reviewed: 2026-09-12