Director ID checks: the 12-month transition ends in November, so build a one-page company admin calendar with AI

By Jason Sibley

If you run a limited company, mid-November 2026 is worth noting. Your company's own deadline may matter more. This guide explains why and shows you how to put every company date on one page.

This is general information, not legal, tax or financial advice. Check Companies House guidance and ask your accountant what applies to your company.

What changed and when

Identity verification for Companies House became a legal requirement from 18 November 2025. GOV.UK's guidance says existing directors and people with significant control (PSCs) get a 12-month transition period. It also says 18 November 2025 "is not a deadline". It's the day the transition started. Regulation 4 of SI 2025/1118 sets that transitional period: 12