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EXPERTISE · REGISTRATION

REACH Registration

What registering a substance actually involves, the data behind the dossier, and the two separate regimes it has to be done in.

The duty that sits behind every REACH conversation.

If you manufacture or import a substance, on its own or in a mixture, above one tonne per year, REACH requires you to register it before it can be placed on the market. Registration is not a form to fill in; it is a data-gathering exercise that scales with tonnage, and the dossier that results from it is expected to hold up to scrutiny for as long as the substance stays on the market.
Registered substances are not static: classifications and supporting data need to be kept current as a matter of course, and a proposed REACH revision would introduce a mandatory 10-year registration validity and renewal cycle, alongside ECHA’s existing powers to review a dossier. Some registered substances are later identified as substances of very high concern and may progress toward REACH authorisation — see our guide to what that involves.
Registration scoping and tonnage band assessment
Dossier data gap analysis and study sourcing
Consortium and joint submission support
GB and EU registration route planning
WHAT A REGISTRATION DOSSIER CONTAINS

Two documents, and a lot of underlying data.

Producing a dossier is fundamentally a data exercise: sourcing, evidencing and writing up the information REACH requires for a given substance and tonnage band, in a form ECHA or HSE will accept.

Technical dossier
Prepared in IUCLID format, covering the substance’s identity, classification, uses and the intrinsic-property data required by REACH Annexes VI to X — study summaries and robust study summaries of the data your registration relies on, whether generated directly or shared through a joint submission.
Chemical Safety Report
Required above 10 tonnes per year, covering the hazard and exposure assessment for each identified use, and, where the substance is classified as hazardous, the risk characterisation showing those risks are adequately controlled.
Data requirements scale with tonnage
The level of testing and the range of endpoints required increases at each tonnage band, from basic physicochemical and toxicological data at the lowest band to extensive long-term studies above 1,000 tonnes per year.
CONSORTIA & DATA SHARING

You rarely register a substance alone.

Registrants of the same substance are required to submit certain data jointly, through one lead registrant, rather than each generating and submitting it separately. That shared data is usually managed through a consortium of the substance’s registrants, or accessed individually through a Letter of Access.

Buying a Letter of Access lets you reference the lead registrant’s data without joining the consortium or gaining ownership of it, and is typically the lower-cost route. Full consortium membership costs more but usually gives a greater say in how the substance’s data and testing strategy are managed going forward.

Identifying the right consortium or joint submission for a given substance
Assessing Letter of Access versus full membership for your position
Reviewing data-sharing and cost-sharing agreements before you commit
Coordinating your dossier with the lead registrant’s joint submission
TWO REGIMES, TWO REGISTRATIONS

Registering with ECHA does not register you with HSE, or the other way round.

This trips up more organisations than almost anything else in REACH: an existing EU registration gives no standing under UK REACH, and vice versa. If you place a substance on both markets, you need a registration position in both, on each regime’s own terms and timetable.

EU REACH · ECHA
Registrations are submitted to the European Chemicals Agency (ECHA) and apply across the EU market. An EU registration does not, on its own, cover the GB market — the two regimes are legally separate since EU Exit.
UK REACH · HSE
Registrations for the GB market are submitted to the UK REACH Agency, run by the Health and Safety Executive. Transitional deadlines for substances brought over from the EU regime have recently been extended, now falling across 2029, 2030 and 2031 depending on tonnage and hazard profile.
THE IMPORTER PITFALL

“Someone else handles that” is the most expensive assumption in REACH.

“We just buy it in — our supplier handles REACH.” That assumption is one of the most common and most costly mistakes we see. If your supplier is based outside the UK or EU market you are selling into, REACH treats you, not them, as the importer, with the same registration duty as if you had manufactured the substance yourself.

Who counts as the importer is not always obvious either: it typically comes down to who places the order, who takes ownership of the goods, and who is named on the customs declaration, rather than who happens to be paying the invoice. A non-UK or non-EU manufacturer can appoint an Only Representative established in the relevant market to register on their behalf — and where that happens, their customers are treated as downstream users instead of importers. Without that arrangement in place, the registration duty defaults to whoever is doing the importing.

Establishing whether your organisation is the importer for a given substance or product
Checking whether an Only Representative arrangement is already in place upstream
Tonnage aggregation across all your suppliers of the same substance, not just one
Closing the gap where a registration duty has gone unrecognised
DEADLINES & FEES

Neither the dates nor the costs are the same across regimes.

Both deadlines and fee schedules move independently in each regime, so a position that was current for one recently can be out of date for the other.

UK REACH transitional deadlines
Deadlines for substances carried over from the EU regime were recently extended and now fall across 2029, 2030 and 2031, staged by tonnage band and hazard profile. Missing the applicable deadline removes the transitional route and can mean the substance cannot legally be placed on the GB market until a full registration is in place.
EU REACH registration fees
ECHA fees are set by tonnage band and were increased by 19.5% from November 2025. Small and medium-sized enterprises can claim reductions of 35% to 95%, but from February 2027, SME status must be verified with ECHA before a dossier is submitted, not claimed at submission.
UK REACH registration fees
HSE charges its own, separate fee schedule for UK REACH registrations, distinct from ECHA’s. Which fee applies, and at what level, depends entirely on which regime — or both — you are registering into.
HOW WE HELP

Turning a registration duty into a managed, funded programme.

Registration decisions get expensive when they are made late: missed deadlines, duplicated testing, and consortium terms agreed to under time pressure all cost more than getting the scoping right at the start.
We help organisations establish whether registration applies to them at all, work out what the dossier will actually require, and navigate the consortium, deadline and fee position across GB and EU registrations at the same time.
Registration scoping, tonnage aggregation and dossier gap analysis
Consortium, Letter of Access and joint submission support
GB and EU registration route planning and deadline tracking
Importer status checks across your supply chain
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Product Stewardship Ltd provides specialist regulatory support, material assurance and compliance training for organisations operating across the UK, EU, industry and defence sectors.

Coverage: UK, EU & Defence sectors
Regulators: HSE & ECHA
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