65 fields down to 52. The compliance moat gets shallower.

A regulator just deleted £108 million a year of work. The firms that did that work are not celebrating.

The FCA published Policy Statement PS26/15 on August 3, 2026. It rewrites how UK firms report their trades.

Start with the bill. Transaction reporting costs the industry about £493 million a year today.

The FCA expects that to drop to roughly £385 million. Call it £108 million a year, gone.

Here is how it gets there. Reporting fields fall from 65 to 52.

FX derivatives come out of scope. That change alone cuts costs for more than 400 firms.

Seven million instruments traded only on EU venues also drop out. That piece is worth about £32 million a year.

The error window shrinks as well. Firms get three years to fix old reports instead of five.

The FCA expects a third fewer resubmissions from that one change. Resubmissions are pure cost with no revenue attached.

There is a new reporting model too. Conditional single-sided reporting lets one firm report a trade instead of both.

The rules bite on April 3, 2028. But the FCA said it will supervise flexibly from August 3, 2026.

Translation: firms can start cutting now.

This is a fee pool with a name. Approved reporting mechanisms, RegTech vendors, and in-house reporting teams split that £493 million.

A fifth of it vanished by rule. Nobody had to be out-competed for that to happen.

Single-sided reporting is the sharper cut. Two firms billing for one report becomes one firm billing for one report.

The work that survives gets harder to defend as headcount. Fewer fields and tighter scope is the exact shape software handles well.

Therese Chambers of the FCA was blunt about the trade. The agency wants fewer reports and better data.

Fewer reports, higher quality. That is a brief for automation, not for hiring.

Not everyone thinks it went far enough. Latham lawyers noted that some market participants called the reforms too timid.

The FCA also admitted a hole it has not filled. Dropping FX derivatives costs it sight of 95 UK branches of foreign firms.

No model appears anywhere in this filing. The point is what the filing makes cheap to automate next.

The compliance moat has been Wall Street's best defense against software. Every field removed makes that moat one field shallower.

Legacy fee pool compression is the metric that moves. A named regulator marked down a £493 million cost base by about a fifth.

More is queued. The FCA and the Bank of England set up a joint reporting taskforce that first met in July 2026.

Its brief runs 18 months across policy, strategy, and architecture. EMIR and SFTR reporting are next in the frame.

The FCA's savings math has a dependency worth noting. It assumes the EU trims its own regime along similar lines.

ESMA has not concluded that work. If Brussels holds firm, cross-border firms keep running two rulebooks.

Enforcement is not going soft, though. The FCA fined Infinox Capital £99,200 in January 2025 over 46,053 unreported trades.

That was the first UK MiFIR enforcement action. Lighter rules, same appetite for catching bad data.

Watch the October 2026 consultation on schema and validation rules. That is where the real build cost gets set.

Watch the vendor contracts too. Reporting renewals signed after October will price in a smaller job.

Territory: +machines on compliance.

A fifth of the UK's transaction reporting bill just lost the rule that created it.