Beneficial ownership changes: When should accountants revisit AML?
Last updated: May 15, 2026
Beneficial ownership changes can affect an accountancy firm’s AML position because the earlier CDD may no longer describe the client as it is now.
For a company or other legal entity, AML is concerned with the person with ultimate ownership, control, or benefit from the business. This is sometimes referred to as the ultimate beneficial owner, or UBO.
If that position changes, the previous understanding may need to be revisited before it is relied on again.
Importantly, the initial task is to identify what changed and decide whether the existing AML basis remains sound.
Contents
Key takeaways
- Beneficial ownership changes can make earlier CDD unreliable where the firm no longer understands the current control position.
- The response should be proportionate to the facts. A narrow update may be enough when the change is clear.
- Companies House and PSC information can help, but AML checks still require the firm’s own judgement.
- Escalation is more likely where the change cannot be explained clearly, or the firm cannot obtain enough CDD evidence.
- Serious outcomes are separate decisions, including EDD or a SAR. They depend on the facts, the level of risk, and whether the firm can complete the checks it needs.
Why beneficial ownership changes can affect AML
For AML purposes, beneficial ownership is concerned with substance. The focus is the person or people behind the client, rather than simply whose name appears in a particular public register or who is formally described as a director.
This change in circumstances is material for existing clients. The Money Laundering Regulations require customer due diligence to be applied to existing customers at appropriate times on a risk-sensitive basis.
Per Regulation 5, firms dealing with legal entities must identify beneficial owners and take reasonable measures to verify them. The firm must also understand the structure through which ownership or control is exercised.
HMRC and accountancy sector guidance recognises that a change in beneficial ownership can be one of the events that prompts a firm to revisit its AML position.
The legal concern is more precise than restarting the entire onboarding process every time there is a change. If the accountant’s AML understanding was based on one ownership or control position, and that position has changed, the firm may no longer know who is behind the business.
This uncertainty can affect risk. In some instances, a new owner or controller may be familiar, low-risk, and easy to understand. Yet, in others, the development may introduce a more complex structure in a different jurisdiction, or control arrangements that are harder to explain. The AML response depends on those facts.
What accountants should understand before relying on the previous AML position
Accountancy firms must understand what has actually changed. A share transfer may be simple on its face, but the AML significance depends on whether it changes practical influence over the client.
The enquiry should not be limited to a direct percentage on a share register, since control may also arise through:
- Indirect ownership through another entity
- Voting rights agreements between shareholders
- Another arrangement that gives a person influence over the client
In a small owner-managed company, even a relatively straightforward share movement can alter who benefits from the business and who can direct its affairs.
For example, a long-standing company client may tell the practice that a new individual has acquired 30% of the shares. This discovery does not automatically make the client high risk.
It does, however, mean the firm needs to understand who the new shareholder is. The firm also needs to consider whether that person now has control or significant influence, and whether the previous beneficial ownership information still reflects the business.
The review process should also consider whether the explanation is consistent with what is already known about the client. A routine succession arrangement within a familiar trading company is different from an unexplained transfer to an unknown party.
Practical takeaway: Public information may show that something has changed, but it is only a starting point. The firm still needs enough understanding to decide whether earlier CDD remains usable and whether risk has altered. If ultimate control remains unclear, the matter should not be treated as routine.
How far should the AML response go after a beneficial ownership change?
Once the change is understood, the next question is how much AML work is needed.
Some cases need only a limited amendment to the client record and a fresh view of whether their profile has changed. Others justify more enquiry before the practice relies on the relationship as it now stands.
For example, shares might move between two already-known family shareholders in a familiar company. The explanation may fit the accountant’s knowledge of succession planning, so in that situation, a focused update to the client AML record may be enough. A short risk reconsideration may reach the same overall client rating.
Focused work still needs enough information to support reliance on existing evidence. Extra verification may be appropriate if the change creates uncertainty, but a share register change alone does not require it. If the firm cannot complete the required CDD, that becomes a separate issue under Regulation 31.
If the share movement reveals other stale information, the issue may be better addressed under a CDD refresh.
| Situation | What the accountant is trying to decide | Possible measured response | What should not be assumed |
|---|---|---|---|
| New owner or controller is clear | Can current information still be used? | Update details and reconsider risk | Full re-onboarding |
| Shares move within a known family group | Does the explanation fit? | Focused update and short rationale | New ID evidence in every case |
| New corporate shareholder | Is the ultimate controller understood? | Further enquiry; verify where needed | Acceptance based on a company name |
| Public register and client account align | Is the AML record still current? | Use as supporting evidence | Register entry decides the AML outcome |
| Required CDD cannot be completed | Can the practice continue or carry out the work? | Pause and consider whether work can continue | That the issue can be handled as a routine update |
How Companies House and PSC information fit into AML checks
Companies House records can help an accountant see whether the public position has changed. PSC entries can also prompt a CDD trigger event where the register shows a new person with significant control. Treat those records as evidence to test against the AML understanding.
The PSC position may overlap with the firm’s AML assessment, or point elsewhere. The question is whether the firm can support its own conclusion on ownership and control.
When the register and the client’s account differ, the first step is usually clarification. The issue needs closer attention if the difference cannot be explained, or if the answer still leaves the firm unsure who is really in charge.
When unclear beneficial ownership needs closer attention
The matter moves beyond a file amendment when a reasonable enquiry has not resolved who the beneficial owner is.
In practice, this can happen where the structure makes control challenging to understand. It is also a concern if the client’s explanation keeps changing or does not match the information available.
This lack of clarity matters because it can prevent the practice from completing its AML duties. Further enquiry may be needed where the structure passes through another entity. The same may be true where influence appears to sit outside the formal shareholding.
While those features do not prove wrongdoing, the firm should avoid relying on an incomplete picture.
Refusal is different from ordinary delay, as the client may need time to gather papers or explain a reorganisation. The concern increases where the client will not provide information needed for CDD, or where the answers appear to obscure the real controller. Any facts suggesting concealment should be escalated.
If the practice still cannot obtain the evidence needed to complete CDD, Regulation 31 becomes relevant.
Regulation 31
“Where, in relation to any customer, a relevant person is unable to apply customer due diligence measures as required by regulation 28, the relevant person—
(a) must not establish a business relationship or carry out a transaction with the customer;
(b) must terminate any existing business relationship with the customer;
(c) must consider whether the relevant person is required to make a disclosure…”
Source: Regulation 31 of the Money Laundering Regulations 2017.
Regulation 31 is about being unable to apply required CDD. A beneficial ownership change does not trigger this by itself. It becomes relevant where the firm cannot complete the CDD it needs to continue acting.
That said, EDD does not automatically follow from the change, although it may be needed where the revised structure raises the client’s risk profile or where the evidence required is greater than before.
A SAR consideration should be kept separate again. It arises only if the information available gives rise to suspicion, such as an apparent attempt to hide the beneficial owner.
In summary
Accountancy firms do not need to treat every beneficial ownership change as a full restart. The practical question is whether the practice still has a sound view of the controlling party.
If that position is clear, the firm can consider whether the client’s risk profile has changed and record the basis for its decision.
However, if important CDD remains missing, that gap should be resolved before the relationship is relied on again. When the required evidence cannot be obtained, the firm may need to consider Regulation 31 and its internal reporting process.
FAQs
No. Accountancy firms should first decide whether the change affects their understanding of the client or its risk profile.
A new PSC should prompt the firm to check whether its AML records still reflect the client. PSC information can help, but it does not replace the firm’s own CDD judgement.
Companies House records can support AML checks, but they are not enough on their own. The firm should compare them with the client’s explanation and the information already held.
AML concern increases when the firm cannot clearly identify the person exercising control. It may also increase if explanations keep changing or the structure becomes difficult to understand.
No. EDD depends on the risk now presented by the client. A SAR depends on whether the available information gives rise to suspicion.
The firm should avoid relying on an AML position it can no longer support. If the missing information prevents the required CDD from being completed, Regulation 31 and internal reporting steps may need to be considered.
References and Source Material
- Money Laundering Regulations 2017 (Regulation 5, 27, 28, 30A, 31, 33, 40)
- HMRC, Economic Crime Supervision Handbook (ECSH33310, ECSH33320, ECSH33390 )
- HMRC, Risks common to accountancy service providers
- HMRC, Accountancy sector guidance for money laundering supervision
- CCAB, Anti-Money Laundering Guidance for the Accountancy Sector
- Companies House, People with significant control (PSCs)
- ICAEW, AML Supervision Report 2024/25
