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Editor's Note: This article was originally published in July 2025 to analyze the proposed options to extend UK REACH transitional registration submission deadlines, and was updated on 24 December 2025 to introduce the finalized decision.
On December 22, 2025, the UK Defra issued a summary of the responses to the consultation on the proposed options of extending the UK REACH transitional registration submission deadlines. Based on stakeholders' feedback and the consent of Scottish and Welsh Ministers, the UK Government will extend the current UK REACH submission deadlines by up to 3 years. New submission deadlines are shown in table below.
The UK Government will bring forward legislation extending the UK REACH submission deadlines. The revised lesgislation will be brought forward in 2026, thereby ensuring that new submission deadlines and compliance arrangements take effect in due course ahead of the first extended deadline in October 2029.
Previous article issued on July 15, 2025:
On July 14, 2025, the Department of Environment, Food and Rural Affairs (Defra) of UK opened a public consultation on the proposals to extend the UK REACH transitional registration submission deadlines. The current deadlines are October 2026, October 2028 and October 2030. The Defra provides three options for the new submission deadlines. Stakeholders can give feedback before September 8, 2025.
Reasons for extension
The UK government is developing a completely new, low-cost registration system, the Alternative Transition Registration model (ATRm). Under UK REACH, companies are required to provide information on chemical substances that are placed on the Great Britain market. This has placed a significant economic burden on companies, leading some to consider exiting the UK market. Recognizing this issue, the UK government began working on the ATRm model, aiming to maintain human health and environmental protection while significantly reducing compliance costs for registrations.
However, the complexity of establishing a new regulatory framework from scratch has exceeded expectations. The UK government has clearly stated that it will not be able to complete the legislative process for the ATRm by the first deadline of October 2026, thus not allowing the industry sufficient preparation time. Therefore, these options for extension have been proposed, aiming at aligning the statutory deadline with actual operational progress.
Proposed extension options
The proposed new submission deadlines include three options as shown in figure below.
Option 1 is the new submission deadlines that the UK government has inclined towards and recommended. Ample time is provided for the preparation of data for the registration in highest tonnage band. It shortens the interval between the subsequent two deadlines from two years to one year.
This shows the UK government’s ambition to significantly reduce the data burden on companies by the implementation of the finalized ATRm model. This pragmatic option balances the need to alleviate the burden on companies while ensuring that UK REACH regulatory authorities receive the necessary data as quickly as possible.
Insights
While the deadline extension is a positive development, it also means that the regulatory framework will not be finalized anytime soon. The UK government acknowledges that it cannot currently confirm with 100% certainty what information will ultimately need to be submitted. Consequently, the challenge for companies has shifted from "how to bear the compliance costs" to "how to manage uncertainty." ChemLinked will continue to monitor UK REACH-related policies to provide the latest news.
