Platforms · Software · Providers · Markets
The FCA has settled changes to UK transaction reporting after consulting on the regime. It puts the current annual industry bill at £493 million and forecasts savings of more than £100 million a year once the changes take effect. Those savings are estimates, not a reduction firms can bank before adapting their reporting operations.
For brokers, the most direct change is that FX derivatives will leave MiFIR transaction reporting and move to UK EMIR. The FCA expects this to lower costs for more than 400 UK firms and remove duplicate submissions. The package also reduces reportable fields from 65 to 52, removes 11 instrument reference data fields for trading venues, and takes around seven million instruments available only on EU venues out of UK scope.
Other changes shorten the period for correcting older errors from five years to three and widen the corporate events exemption. IPOs, secondary offerings, placings and debt issuance will still need to be reported. The new regime becomes fully effective on 3 April 2028, but the shorter correction period and a flexible supervisory approach apply from 3 August 2026.
How the reporting figures change
| Measure | Figure or date |
|---|---|
| Estimated annual industry reporting cost | £493 million |
| Expected annual savings | More than £100 million |
| Reportable fields | 65 to 52 |
| Venue reference data fields removed | 11 |
| EU-only instruments removed from scope | Around seven million |
| UK firms expected to benefit from the FX derivatives change | More than 400 |
| Historical correction window | Five years reduced to three years |
| Cut-off after execution | Seven days |
| Flexible supervision and shorter correction window begin | 3 August 2026 |
| Draft technical pack expected | October 2026 |
| Full implementation | 3 April 2028 |
Where firms may still face work
The FCA will make its Financial Instruments Reference Data System, or FIRDS, the determining reference for whether an instrument is reportable. A seven-day limit after execution will define when the instrument status is assessed.
That should reduce the need to keep revisiting a trade to see whether its instrument has subsequently appeared in the system. It also makes the quality and ownership of reference data more consequential: firms need to know its source, refresh frequency and internal owner.
For derivatives on indices, firms may report all transactions in the category rather than build logic to separate those outside the requirements. The regulator has also created Conditional Single-Sided Reporting through PS26/15, intended to let firms use a counterparty's reporting instead of duplicating the same submission. Some buy-side respondents questioned how much benefit that would bring. Delegation still depends on sound data exchange, agreed accountability and suitable contracts.
The FCA plans to issue a draft schema, validation rules and updated guidance in October 2026 as the Transaction Reporting User Pack. Until those technical materials are available, firms can scope likely changes but cannot develop against the final specifications.
The shift is part of wider work by the FCA and the Bank of England: their Transaction and Post-trade Reporting Industry Harmonisation Taskforce is developing a framework spanning UK MiFIR, UK EMIR and UK SFTR. Further consultations may follow. The changes and the expected savings were first reported by Finance Magnates.
What this changes for operators
Reporting teams and their service providers can start by mapping where FX derivative records currently feed MiFIR and UK EMIR, then checking which flows should change when the new regime is fully in force. The scope review should also identify instruments traded only on EU venues, the treatment of index derivatives and any corporate-event data still captured under the wider exemption.
FIRDS introduces operational questions beyond a rules update. Which source feeds each system, how often is it refreshed, and who is accountable for exceptions? Teams should also compare correction procedures with the three-year limit, while tracking the October 2026 schema and validation rules before committing to detailed build and regression-testing plans.
Single-sided reporting will need its own controls if firms use a counterparty's submissions. Operators should establish how data will be exchanged, how responsibilities are recorded and what happens when a submission is missing or inconsistent. The FCA's cost estimate does not remove that implementation effort; firms have the next 18 months to map reporting flows and prepare for the technical changes.
