Journey

UK REACH registration deadline approaching

Steps to take as your UK REACH registration deadline approaches -- from checking your obligations to preparing your registration dossier.

Running a Business Updated 15 September 2026
4 milestones references 3 guides

Your registration deadline is approaching

UK REACH replaced EU REACH for the Great Britain market after Brexit. If you held an EU REACH registration, you were granted a transitional period to submit a full UK REACH registration. That transitional period is now ending. This pathway helps you confirm your deadline, review your obligations, and prepare your registration dossier.

  1. Confirm your deadline and tonnage band

    UK REACH registration deadlines depend on the tonnage of each substance you manufacture or import per year. Check which band applies to each of your substances:

    • 1,000+ tonnes per year -- earliest deadline
    • 100-999 tonnes per year -- intermediate deadline
    • 1-99 tonnes per year -- final deadline

    If you manufacture or import multiple substances, each has its own tonnage calculation and potentially a different deadline. Check every substance individually.

    UK REACH registration guide

    Comprehensive guide to UK REACH registration requirements, including who must register, what data is required, how to submit a dossier to HSE, and the transitional arrangements from EU REACH.

  2. Review your substances for additional obligations

    Beyond standard registration, some substances carry additional requirements that affect your timeline. Substances of Very High Concern (SVHCs) on the UK REACH Candidate List trigger notification and communication duties. Substances on the Authorisation List require separate authorisation to continue using them.

    Check every substance you manufacture, import, or use against the current UK REACH Candidate List and Authorisation List. These obligations apply in addition to registration, not instead of it.

    UK REACH SVHC obligations

    Guide to your duties when manufacturing, importing, or using Substances of Very High Concern -- including Candidate List notification, supply chain communication, and authorisation requirements.

  3. Prepare your registration dossier

    A UK REACH registration dossier requires hazard data, exposure information, and a Chemical Safety Report for substances at 10 tonnes or more per year. The data requirements increase with tonnage band. If you held an EU REACH registration, some of your existing data may be transferable, but you must ensure it meets UK REACH-specific requirements.

    Consider joining a Substance Information Exchange Forum (SIEF) to share data and costs with other registrants of the same substance. Joint submission reduces duplication and is encouraged by HSE.

  4. If you cannot register in time

    If your deadline has passed or you cannot complete registration in time, you may need to change your role in the supply chain. A downstream user who does not manufacture or import the substance directly does not need to register it -- but they must ensure their supplier holds a valid registration covering the relevant use.

    Switching from importer to downstream user means sourcing the substance from a GB-based supplier or a non-GB supplier who has appointed an Only Representative. This is a significant supply chain decision that should not be left to the last moment.

    UK REACH downstream user obligations

    Guide to downstream user duties under UK REACH, including use reporting, safety data sheet compliance, and what to do if your supplier's registration does not cover your use.