Of all UK-regulated sectors, it is one of the few where firms have already faced a meaningful round of AML enforcement, so the sector heads into 2027 with genuine lessons from recent supervisory activity.
It is also one of the few sectors about to undergo a wholesale change of regulator.
The Government confirmed in October 2025 that the FCA will become the single AML supervisor for professional services, including accountancy and tax, by 2026. ICAEW, ACCA, CIOT, AAT, CIMA, the IFA, and other professional body supervisors that have handled accountancy AML oversight for the last decade will be replaced by a single statutory regulator. HMRC will continue to supervise firms that do not fall under a professional body, but the strategic direction is clear: the FCA becomes the lead voice on how UK accountancy is held to account for AML.
For firms that have treated compliance as a professional obligation but not an operational investment, that transition is going to land hard. For firms that have been building to the standard the ICAEW has been raising throughout 2025, the transition is a step-change, but not a full rebuild.
That is the specific journey the accountancy sector is making through 2027.
Our 2026 Compliance Reality Check, based on research with 1,000 senior decision-makers across UK regulated sectors, found accountancy sits in a moderately prepared position. 48% of accountancy firms describe themselves as having adopted digital compliance tools, slightly ahead of the 45% sector average. On most other measures, including beneficial ownership verification and identity check automation, accountancy sits roughly in line with the regulated sector as a whole.
ICAEW’s most recent AML monitoring data tells a sharper story. Across its most recent round of firm monitoring visits, approximately one in three accountancy firms inspected were found to be non-compliant with aspects of their AML obligations. The specific weaknesses have been consistent: documented firm-wide risk assessments that have not kept pace with current threats, customer due diligence that doesn’t extend fully to complex ownership structures, source of funds verification that has been treated as a form rather than an evidence trail, and fit and proper checks on beneficial owners, officers and managers (BOOMs) that have either not been done, not been documented, or not been refreshed at the intervals the regulator expects.
None of this is new to anyone who has sat through an ICAEW monitoring visit in the last two years. What is new is that the enforcement environment around these weaknesses is about to intensify materially.
For the sector’s larger firms, the ICAEW’s enforcement activity through 2025 and 2026 has already set a sharper tone than earlier supervisory cycles. Specific firms have faced significant fines for AML failings. Monitoring visits have become more rigorous. Enforcement decisions have been published with more detail than before. The direction of travel inside the professional body supervisory regime was already moving toward a tougher standard.
HMRC, which supervises accountancy firms that sit outside the professional body system, has been equally active. The pattern has been consistent with its enforcement across estate agents and other HMRC-supervised sectors: more penalties, published more publicly, with trading-without-registration becoming the single most common reason for enforcement action. Firms at the smaller end of the sector have not been immune.
For the sector’s compliance leaders, the pattern is clear. Enforcement activity has been scaling throughout 2025 and 2026. Monitoring visits have been more pointed. The expectations of what good AML looks like have risen. The firms that have invested in getting ahead of this standard are, in the main, the firms that have cleared recent monitoring visits well. The firms that haven’t invested have been finding out why that matters.
Accountancy has already felt the enforcement sting. Supervision is about to intensify it.
The FCA transition is not a tonal change. It is a step-change in supervisory standard.
To understand what accountancy firms are now preparing for, it is worth looking at the enforcement environment the FCA has been running across the sectors it already supervises. In 2025, FCA AML fines across its existing regulated population reached over £23 million, with Barclays and Monzo (£21.1 million) absorbing the largest penalties of the year. The FCA has published its intentions with unusual clarity: the strategy of being a smarter regulator will not mean a lighter touch on AML; it will mean sharper supervisory judgement and faster enforcement decisions when controls are found to be inadequate.
That is the enforcement standard accountancy firms are now preparing to meet.
Practically, FCA supervision will look different from ICAEW monitoring in several specific ways. Documentation standards will be higher. The expectation that AML controls can be demonstrated through evidence, not inferred from policy, will be greater. Inspection-readiness will be a continuous rather than periodic obligation. Senior Managers and Certification Regime (SMCR)-style accountabilities, which are not currently a feature of ICAEW supervision, may follow in time.
For well-run firms, this is manageable. For the one in three firms already found non-compliant under the ICAEW standard, the FCA transition is a step they are not currently prepared for. That is the specific risk window the sector is now navigating.
The modest digital adoption lead accountancy holds over other UK regulated sectors (48% vs the 45% sector average) is real, but it is not enough to carry the sector through the 2027 regulatory and supervisory environment.
Three reasons.
First, the baseline is not where it needs to be. 48% adoption of digital compliance tools means more than half of UK accountancy firms are still operating AML processes that are substantially manual. In an environment where the FCA will expect inspection-ready evidence trails on demand, manual processes are a specific operational risk. Our research found that 54% of UK regulated firms (including the accountancy slice) are still conducting identity checks manually, and 52% struggle to verify beneficial ownership in complex structures. Both of those are precisely the operational weaknesses ICAEW monitoring has been flagging.
Second, the EU AMLR applies from July 2027, and it changes the dual-compliance picture for accountancy firms with EU clients, EU corporate structures or cross-border work. The EU AMLR introduces new EU-wide standards on customer due diligence, beneficial ownership (with reduced thresholds and tighter verification requirements), and the €10,000 cash transaction ceiling. From 2028, the EU’s new Anti-Money Laundering Authority (AMLA) in Frankfurt starts direct supervisory responsibilities. UK accountancy firms doing cross-border work are preparing for both regimes in parallel, and the digital tooling that supports UK-only compliance doesn’t always support the EU AMLR’s specific requirements.
Third, fit and proper checks on BOOMs are a specific operational pain point the current supervisory regime has been flagging repeatedly, and they get harder under the FCA standard rather than easier. The expectation under FCA supervision will be that BOOM checks are documented, refreshed, and linked to an auditable risk register. Firms that have been treating these as a tick-box renewed annually will find that standard tightens materially.
A slight head start on digital isn’t the same as being ready.
For accountancy firms planning well for 2027, three specific moves distinguish the firms getting ahead from the firms waiting to be told.
Audit current AML controls against the FCA standard, not the ICAEW standard. The step-change in supervisory expectation matters more than any single control weakness. A firm that was comfortable with its ICAEW monitoring position in 2025 is not necessarily comfortable with its position under FCA supervision in 2027. An internal audit, or a specialist external one, against the FCA’s expected standard is the single most useful 2027 planning exercise accountancy compliance leaders can commission now.
Fix the specific operational gaps that have been showing up in ICAEW monitoring. Firm-wide risk assessments, customer due diligence on complex corporate structures, source of funds evidence trails, and BOOM checks are the four areas ICAEW has been flagging. The FCA will inherit the same expectations and push harder on each of them. Investing in integrated technology that automates identity verification, standardises CDD, and holds BOOM evidence trails in a single defensible system is precisely the move that closes these gaps at operational scale.
Build for the EU AMLR if cross-border exposure applies. For accountancy firms with EU-based clients, EU corporate structures or cross-border transaction exposure, the July 2027 AMLR commencement date is already shaping compliance investment decisions. The firms building their 2027 roadmap now, with EU-specific requirements factored in, will be the ones who absorb the AMLA supervisory transition from 2028 without a step-change in cost or risk. The firms treating EU AMLR as a 2028 problem will be rebuilding under live supervisory pressure.
The accountancy sector heads into 2027 with a specific advantage and a specific risk. The advantage is that it has already been through a meaningful round of AML enforcement, which means the sector’s compliance leaders know what gaps look like in practice. The risk is that the enforcement standard the sector has been preparing for is about to be replaced by a sharper one.
The firms that treat 2027 as the year to lift their compliance infrastructure to FCA-grade will be the ones best positioned for the 2028 supervisory environment that follows. The firms that don’t will find themselves navigating a new supervisor, a new enforcement standard and a new European dimension at the same time.
Accountancy has been warned once already. The direction of travel is clear. The firms that act on that warning now will be the ones still in the strongest position in 2028.