UK transaction reporting is moving towards an important period of regulatory change. The Financial Conduct Authority (FCA) is progressing with reforms designed to simplify the existing MiFIR transaction reporting framework, strengthen data quality and focus reporting requirements more closely on information relevant to UK market supervision.
Through Consultation Paper CP25/32, published in November 2025, the FCA proposed a series of changes to the transaction reporting regime. The consultation closed on 20 February 2026, with final rules expected during the second half of the year.
For firms subject to UK MiFIR reporting requirements, this creates an important preparation period. Although the reforms are intended to reduce the reporting burden over the longer term, adapting to the new framework is likely to require changes to data, systems, reporting logic and internal controls.
Preparing for a Changing Reporting Framework
The proposed reforms go beyond minor amendments to existing requirements.
Among the changes under consideration are a reduction in the number of reportable data fields, changes to the scope of reportable instruments and a shorter period for correcting historical reporting errors.
For reporting firms, these changes may affect multiple parts of the transaction reporting process.
Existing data mappings and reporting logic will need to be assessed against the new requirements, while internal systems and integrations with Approved Reporting Mechanisms (ARMs) may also require updates.
Preparing early can therefore help firms identify potential gaps before the final rules are published.
Three Areas Firms Should Prioritise
As the regulatory framework develops throughout 2026, firms should consider focusing on three key areas.
Assess existing reporting processes
Current processes should be mapped against the proposed requirements to identify where changes to data, systems or controls may be necessary.
Consider reporting obligations collectively
Regulators continue to focus on improving consistency and reducing unnecessary duplication across regulatory reporting frameworks where possible. Firms managing MiFIR alongside regimes such as EMIR and SFTR may therefore benefit from taking a more coordinated approach to reporting data and controls.
Prepare technology for change
Changes to reporting fields, validation requirements and regulatory logic may require modifications to internal technology and ARM integrations. Understanding these dependencies early can make implementation more manageable once the final requirements are confirmed.
Why Early Preparation Matters
The timeline for implementation may appear relatively long, but significant system and process changes can require substantial development and testing.
The FCA published CP25/32 on 21 November 2025, and the consultation closed on 20 February 2026.
The Policy Statement and final rules are expected in H2 2026, followed by an anticipated implementation period of approximately 18 months during which firms will need to adapt their systems, controls and reporting processes.
This preparation period will be important. Delaying implementation planning could result in compressed development schedules, increased costs and greater risk of reporting errors during the transition.
Early preparation gives firms more time to assess their current infrastructure, test revised reporting logic and ensure that appropriate controls are in place ahead of implementation.
UK and EU MiFIR Continue to Diverge
Another important consideration is the growing difference between the UK and EU transaction reporting frameworks.
Following Brexit, the two regimes have continued to develop independently. Changes to EU MiFIR in 2024 expanded the scope of reportable items, while ESMA has also been considering broader changes to financial transaction reporting.
At the same time, the FCA is developing a UK-specific approach through CP25/32.
For firms operating in both jurisdictions, this means that relying on a completely harmonised UK and EU reporting process may become increasingly difficult.
Reporting infrastructures may need to accommodate different regulatory logic, controls and operational requirements while still maintaining consistency in the underlying data.
Data Quality Remains a Key Challenge
Regulatory reform does not reduce the importance of accurate transaction data.
Data gaps, reconciliation breaks and complex instrument structures can create significant manual work and increase the risk of inaccurate or incomplete reports.
Strong validation processes are therefore essential.
Firms need appropriate controls to identify errors before submission, investigate exceptions and maintain a clear audit trail of their reporting activities.
Technology can support this process by automating data capture, enrichment and validation, reducing the level of manual intervention required throughout the reporting lifecycle.
Managing Reform Uncertainty
One of the immediate challenges for firms is preparing for change while some aspects of the future framework remain subject to final confirmation.
The reforms are expected to generate longer-term efficiencies, but implementation may still require technology changes, updates to internal policies, coordination with reporting providers and extensive testing.
Transitional provisions will therefore be particularly important.
Following publication of the final rules, the FCA is expected to provide additional guidance and related Handbook changes ahead of implementation. Firms will need to monitor these developments closely and adjust their implementation plans accordingly.
Using Technology to Manage MiFIR Reporting
As regulatory reporting frameworks become more complex and jurisdiction-specific, specialist technology can help firms manage reporting obligations in a more controlled and scalable way.
MAP FinTech, Complyport’s award-winning RegTech platform, supports firms across the MiFIR transaction reporting lifecycle.
The platform provides automated data capture, enrichment and validation capabilities designed to improve data consistency and reduce manual processes. Regulatory logic can be adapted as requirements evolve, while built-in controls and auditability support stronger governance over the reporting process.
Its scalable infrastructure also enables firms to manage multiple regulatory reporting obligations through a centralised environment, helping them respond more efficiently as reporting regimes change.
Looking Ahead
The UK MiFIR reforms represent an important transition for firms with transaction reporting obligations.
Although the FCA’s proposals aim to create a more streamlined regime, firms will still need to carefully assess the impact on their systems, data, controls and operational processes.
With final rules expected in the second half of 2026, organisations that begin their impact assessments and implementation planning early will be better positioned to manage the transition in a controlled and efficient manner.
Find out how MAP FinTech can support your MiFIR transaction reporting requirements and help you prepare for the evolving UK reporting framework.