The Control Test: How a Deal Can End Your Audit Registration

General information for practice owners, current to September 2026. Regulation numbers refer to the UK Audit Regulations and Guidance effective 1 June 2025. Rules and deadlines change — take your own advice, and speak to your registering Institute, before acting on any of this.

Most conversations about selling a practice are about price, structure and staff. If your firm is audit registered, there is a fourth conversation that almost nobody has early enough, and it is the one that can quietly destroy value on completion day: whether the firm still qualifies to be a registered auditor once the shares have moved.

Audit registration is not an asset that transfers with the company. It is a status the firm holds only while it keeps meeting an eligibility test, and that test is about control — specifically, about who holds the votes. Sell the wrong percentage to the wrong person and the firm fails the test the moment the transfer completes. Not in a year, when someone notices. That day.

Why the ownership question got sharper this year

Two things have changed the temperature. The first is the consolidation wave itself: outside money has been buying into UK accountancy at pace, and a great deal of it is not audit qualified. The second is that the regulators have responded by tightening their sightlines on exactly this.

From 20 April 2026, firms on the FRC's register to audit public interest entities must notify the FRC as early as reasonably possible ahead of planned governance or ownership changes, including restructuring and private capital investment. That replaced an allowance to notify within ten working days after the changes had completed. Anthony Barrett, the FRC's Executive Director of Supervision, framed the reason plainly: the audit market is changing, with increasing restructuring activity and private capital investment across the sector, and the FRC wants visibility during periods of significant change.

Most owner-managed firms are not on that register. But the direction of travel is unmistakable, and it lands on smaller firms through their recognised supervisory body instead. ICAEW's own position is that any audit registered firm considering a change of ownership to introduce private capital should engage with the FRC and its supervisory body as early as possible — and that those discussions are held in confidence.

The control test, in plain English

For any firm that is not an unincorporated sole practice — so partnerships, LLPs and limited company practices, including incorporated sole practices — regulation 2.03 sets the additional eligibility requirements. Two limbs do the heavy lifting:

• Regulation 2.03b — the firm. Individuals who hold an appropriate qualification, together with registered auditors, must hold at least a majority of the voting rights that enable them to direct the firm's overall policy or alter its constitution.
• Regulation 2.03c — the board. The same group must hold at least a majority of the voting rights in the management board, on the same basis.

Both limbs have to hold. Passing the shareholder test and failing the board test is still a failure. And note what the test is measuring: not economic ownership, but the right to direct policy or change the constitution. A shareholder with 40% of the equity and no votes on constitutional matters is invisible to this test; a 10% holder with a veto over the articles is not.

There is a related trap in regulation 2.10. Where one registered auditor is a principal or shareholder in another registered auditor — which happens more often than you would think in group structures — its interests at meetings of principals, the management board or shareholders must be represented by an individual who holds an appropriate qualification. Sending the finance director to the board meeting will not do.

When “majority” is not 50% — and the even-numbered board

This is where well-run firms come unstuck, because the word is not used loosely. The regulations define majority as more than 50% — unless the firm's constitution specifies a higher percentage of those rights is required for decision-making, in which case majority means that specified percentage or more. Decision-making here covers all management or ownership decisions that direct overall policy or alter the constitution.

Read that twice if you have a well-drafted shareholders' agreement. Partners routinely insert a 75% threshold for constitutional changes precisely because it protects minorities. That protective clause silently raises the audit control bar from 51% to 75%.

The second trap is simple arithmetic. If all principals or shareholders have equal voting rights, at least a majority of them must hold an appropriate qualification. On a four-director board with one vote each, two audit-qualified directors hold exactly 50% — and 50% is not more than 50%.

The clock: ten business days, then ninety that cannot be extended

Suppose the test does fail. The regulations are not merciless, but they are fast.

Regulation 2.11 requires a registered auditor to tell its registering Institute in writing as soon as practicable, and not later than ten business days after the event, about a long list of changes — including new or departing principals and responsible individuals, changes to the management board, and, for a corporate practice, any change in the name or address of a shareholder or anyone with an interest in the shares, and any change in the number of shares held or in which anyone has an interest. Deals trigger most of that list at once.

Regulation 2.17 is the sharper one. If the firm ceases to meet the eligibility requirements of regulation 2.02 or 2.03, it must notify the Registration Committee in writing within ten business days of the situation arising, setting out what has happened and the action it proposes to take. The committee may then grant a dispensation under regulation 2.18 if it is satisfied the firm is taking all practical steps that will remedy the position, and only if continued registration during that period would not adversely affect an audit client or anyone else.

Then regulation 2.19 closes the door. For eligibility matters the dispensation will not last more than 90 days, starting from the date the situation first arose — not from the date you noticed, and not from the date you asked. The guidance states in terms that the 90 days cannot be extended, and that if the situation is not put right in the time allowed, the firm's registration will end.

What a limited company practice's articles must actually say

Regulation 2.03d is easy to overlook because it is not about people at all — it is about drafting. Where the firm is a corporate practice, the articles of association must:

• require shareholders to notify the company of any change in the number of shares they hold, whether held directly or indirectly;
• enable the board to require shareholders to supply information about their shareholdings over the previous three years;
• enable the board to require any non-shareholder the directors know or reasonably believe has, or had, an interest in the shares to supply information about that interest over the previous three years;
• enable the board to strip a shareholder of the right to vote if that information is not supplied in the time specified;
• enable the board to strip voting rights where registration is refused or withdrawn on grounds relating to the ownership of a shareholding; and
• require board approval of any share transfer that would result in a shareholder holding an interest representing more than 3% of the aggregate nominal value of the issued share capital.

That last one is the practical bite. A 3% threshold is low, and it means the board must formally approve essentially any meaningful movement in the share register. If your articles were adopted from a generic model years ago, or amended during a reorganisation without anyone rereading regulation 2.03d, this is worth a look before a buyer's solicitor finds it in due diligence. An articles defect is cheap to fix in advance and expensive to fix at exchange.

Sole practitioners: the alternate you should already have

If the firm is a sole practice, regulation 2.02A applies. The sole practitioner must put in place formal arrangements with an alternate, to take effect in the event of their incapacity or death, and must confirm to the Registration Committee that those arrangements exist. The requirement took effect on 1 June 2025, with a six-month transition, so the deadline to have an alternate appointed was 1 December 2025.

The bar is lower than most sole practitioners assume. The alternate must be a member of ICAEW, ICAS or Chartered Accountants Ireland, or of ACCA — they do not need to be a registered auditor, and they do not need a practising certificate. There is no expectation that they take on the business. The policy aim is continuity of service for clients and staff, and the alternate could instead effect an orderly transition of clients to a new auditor.

Two cautions from the guidance itself. First, if your alternate is a responsible individual in their own firm, that status does not permit them to act as RI on behalf of your sole practice — a common and expensive misunderstanding. Second, choose on capacity, ability to act quickly, skills and conflicts of interest, not on who owes you a favour. And under regulation 2.11d, any change in the alternate's name or address, including if the arrangement ceases, is itself a ten-business-day notification.

For a sole practitioner this is really succession planning wearing a regulatory hat. If you have not thought past the alternate to what actually happens to the firm, our guide to succession planning for your practice is the fuller conversation.

Private capital, and why the buyer's identity is now a technical question

The consolidation story has been told mainly as a story about price. The control test turns it into a structural one. An outside investor that takes a controlling economic stake in a firm with audit clients has to be structured so that audit-qualified individuals still control the votes that direct policy and alter the constitution — at firm level and at board level. That is achievable, and it is being achieved, but it is deliberate work rather than something that falls out of a normal share purchase agreement.

It also changes the calculus of who you sell to. A buyer who already understands audit eligibility will raise it at heads of terms. A buyer who does not may discover it in the final fortnight, at which point the audit block becomes a problem to be discounted rather than an asset to be paid for. That is one of the quieter reasons the identity of the buyer matters as much as the multiple — a theme we have written about in PE roll-ups versus selling direct.

What to do before you go to market

1. Write down the voting position. Not the shareholding — the votes that direct overall policy and alter the constitution, at firm level and on the management board separately.
2. Read your constitution for thresholds. Any clause requiring more than a simple majority for constitutional or ownership decisions raises the audit control bar to that same number.
3. Count the board. An even board split evenly on qualification does not pass. Fix it with a casting vote, a change of composition, or a weighting.
4. Check the articles against regulation 2.03d, including the 3% transfer-approval clause.
5. Sole practice? Confirm the alternate is appointed and that the Registration Committee has been told.
6. Model the post-completion position before you sign anything. Run the test on the day-after cap table, not the day-before one.
7. Raise it at heads of terms. If audit registration is meant to survive, that belongs in the heads of terms, not in the disclosure letter.

None of this makes an audit block harder to sell. It makes it easier — because the alternative is discovering at exchange that a chunk of your recurring fees has a ninety-day fuse attached to it. Firms that have already done this work simply present a cleaner asset, which is the same principle that runs through increasing the value of your practice generally.

Frequently asked questions

Can I sell my audit-registered practice to a buyer who is not a registered auditor?

You can sell the firm, but the registration does not necessarily survive the sale. Audit regulation 2.03b requires that individuals holding an appropriate qualification, together with registered auditors, hold at least a majority of the voting rights that direct the firm's overall policy or alter its constitution. Regulation 2.03c applies the same test to the management board. If the incoming owner is not audit qualified and takes a holding that pushes the qualified group below that majority, the firm stops being eligible on completion day. That is survivable if it is planned for — by structuring voting rights, retaining a qualified principal, or transferring the audit clients deliberately — and painful if it is discovered afterwards.

What happens if my firm fails the audit control test after a deal completes?

Two clocks start. Under regulation 2.17 the firm must notify the Registration Committee in writing within ten business days of the situation arising, saying what has happened and what it proposes to do about it. The committee can then grant a dispensation under regulation 2.18 if it is satisfied the firm is taking all practical steps to put things right. For eligibility matters the dispensation cannot last more than 90 days, starting from the date the situation first arose, and the guidance is explicit that this period cannot be extended. If the position is not corrected inside the 90 days, the firm's registration ends.

Does majority always mean 51% for audit firm control?

No, and this is where firms get caught. The regulations define majority as more than 50%, unless the firm's constitution requires a higher percentage of voting rights for decision-making — in which case majority means that higher percentage. So if your articles or partnership agreement require 75% to alter the constitution, audit-qualified individuals need 75% of the votes, not 51%. The other trap is arithmetic: on a four-person management board with one vote each, two qualified directors hold exactly 50%, which is not more than 50%. An even-numbered board split evenly on qualification fails the test as it stands.

I am a sole practitioner auditor. Do I really need an alternate?

Yes. Regulation 2.02A requires a registered auditor that is a sole practice to put formal arrangements in place with an alternate, to take effect on the incapacity or death of the sole practitioner, and to confirm to the Registration Committee that this has been done. The requirement took effect on 1 June 2025 with a transition period to 1 December 2025, so it is already live. The alternate must be a member of ICAEW, ICAS, Chartered Accountants Ireland or ACCA, but need not be a registered auditor and is not expected to take on the audit work — the role is to keep things moving and, if needed, hand clients to a new auditor in an orderly way.

Do the FRC's private capital rules apply to a small practice?

The specific advance-notification duty applies to firms on the FRC's register to audit public interest entities, which most owner-managed practices are not. From 20 April 2026 those firms must tell the FRC as early as reasonably possible ahead of planned governance or ownership changes, including restructuring and private capital investment, rather than within ten working days afterwards. Smaller firms sit with their recognised supervisory body instead, but the expectation runs the same way: ICAEW's guidance is that any audit registered firm considering a change of ownership to introduce private capital should engage with the FRC and its supervisory body as early as possible, in confidence.