The UK’s transaction reporting framework is set for significant change as the Financial Conduct Authority (FCA) moves forward with proposed reforms to the UK Markets in Financial Instruments Regulation (MiFIR).
Following the UK’s departure from the European Union, the FCA has been reviewing the existing transaction reporting regime with the aim of creating a framework that is more proportionate, effective and better suited to the UK market.
The proposals outlined in Consultation Paper CP25/32 represent an important step in this process. With final rules expected in the second half of 2026, investment firms should already be considering how the proposed changes could affect their reporting systems, data and operational processes.
What Could Change Under UK MiFIR?
The FCA’s proposals are intended to simplify transaction reporting while ensuring regulators continue to receive the information they need for effective market oversight.
One of the most notable proposals is a reduction in the number of reportable fields. This could help remove information considered to have limited regulatory value and reduce unnecessary complexity for reporting firms.
Other proposed changes include adjustments to the scope of reportable instruments, revisions to reporting requirements and validation rules, and changes to how firms manage historical transaction reporting errors.
Although simplification should ultimately reduce some of the reporting burden, implementing the changes will still require careful preparation.
Firms may need to update reporting logic, data mappings, internal controls and connections with Approved Reporting Mechanisms (ARMs) to ensure their systems are aligned with the new requirements.
Data Quality Will Remain Critical
Simplifying the reporting framework does not reduce the importance of accurate and complete transaction data.
Data quality remains a key regulatory priority. Errors in transaction reports can arise from missing information, incorrect field population, inconsistent source data or weaknesses in internal reporting processes.
Strong validation and reconciliation controls are therefore essential.
Firms should be able to identify potential issues before reports are submitted, investigate exceptions efficiently and maintain appropriate evidence of their reporting processes and controls.
Automating these activities can help reduce manual intervention and provide reporting teams with greater visibility over the quality of their submissions.
The Growing Divergence Between UK and EU MiFIR
For firms operating across both the UK and European Union, regulatory divergence is becoming an increasingly important consideration.
While the UK MiFIR framework was originally based on the EU regime, the two are developing independently following Brexit.
As reforms progress on both sides, firms may increasingly need to accommodate differences in reportable fields, regulatory logic, validation requirements and reporting scope.
This can create additional complexity for organisations that operate across multiple jurisdictions.
Reporting infrastructures therefore need to be flexible enough to support different regulatory requirements without forcing firms to maintain entirely separate processes for each market.
Preparing for Implementation
Although the FCA’s final rules are expected in the second half of 2026, firms should not wait until publication before assessing the potential impact on their reporting operations.
Early preparation can help organisations understand where changes may be required and provide sufficient time for development, testing and implementation.
Firms should consider reviewing:
- Existing UK MiFIR reporting fields and data sources
- Current reporting and validation logic
- Data quality and reconciliation processes
- ARM connectivity and submission workflows
- Governance and exception management
- Areas where UK and EU reporting processes currently overlap
Once the final rules are published, firms are expected to have an implementation period before the revised requirements take effect. Using this period effectively will be important, particularly for organisations with complex reporting infrastructures.
The Role of Technology in Managing Regulatory Change
Regulatory change is an ongoing challenge for transaction reporting teams.
Every change to reporting fields, validation rules or regulatory logic can require adjustments across data sources, internal systems and reporting workflows.
A flexible reporting platform can reduce this operational burden by allowing regulatory changes to be incorporated without requiring firms to repeatedly redesign their internal infrastructure.
Automation can also support the reporting lifecycle by collecting and enriching transaction data, applying the relevant regulatory rules, validating information and preparing it for submission.
For firms subject to multiple reporting regimes, a centralised approach can provide additional benefits by allowing different obligations to be managed through a common reporting infrastructure.
Supporting MiFIR Reporting with MAP FinTech
MAP FinTech, Complyport’s award-winning RegTech platform, supports financial institutions with the automation and management of their MiFIR transaction reporting obligations.
The platform provides a centralised environment covering the reporting lifecycle, from data collection and enrichment through to validation, transformation, submission and monitoring.
Its flexible infrastructure is designed to accommodate evolving regulatory requirements across multiple regimes and jurisdictions, helping firms respond to regulatory change without unnecessary re-engineering of their existing systems.
As the UK moves towards its revised MiFIR transaction reporting framework, this flexibility can help firms prepare for new requirements while maintaining accuracy, control and efficiency across their reporting operations.
Looking Ahead
The proposed UK MiFIR reforms represent an important development for firms with transaction reporting obligations.
While simplification is a key objective, the transition will still require firms to assess their data, technology, controls and reporting processes carefully.
Preparing early can help organisations identify potential gaps, plan system changes and make effective use of the implementation period once the FCA publishes its final rules.
Find out how MAP FinTech can support your MiFIR transaction reporting requirements and help your organisation prepare for regulatory change.