Controls Before Congratulations: A Day-One Entity Checklist for UK Bolt-On Acquisitions

When a UK group completes a bolt-on acquisition, board attention tends to move immediately to the commercial case: the cross-sell, the retained customer base, the synergies written into the integration plan. The entity-level mechanics that allow the new subsidiary to function as a controlled part of the group are often left to a small finance team to work through in the weeks that follow.

That sequencing is understandable, and frequently expensive. The value case for a bolt-on usually rests on a handful of operating assumptions — shared back office, group procurement, consolidated banking, a common reporting calendar. Each of those depends on the acquired company being properly wired into the group's control framework. Where that wiring is deferred, the assumptions quietly stop being true, and the first board review of the acquisition arrives with a variance nobody can explain.

The checklist below is deliberately unglamorous. It is also the difference between an acquisition that is integrated and one that is merely owned.

The integration value sits in unglamorous places

Most failed integration narratives begin with a systems problem. In practice, the earlier failure is usually one of authority: nobody at the acquired entity can approve a payment, sign a contract or release payroll without reference to a seller who has already left the building. A bank mandate that takes eleven weeks to transfer does more damage to day-one confidence than a delayed ERP migration ever will.

Treat entity controls as a completion condition rather than a post-completion clean-up task. The test is simple: on the first working day after completion, could the acquired finance manager pay a supplier, onboard a new starter and produce a reliable cash position without asking anyone outside the group for permission?

Before completion: the register that must be closed

The following items are best settled in the four to six weeks before signing, while the seller still has every incentive to cooperate:

• Board composition. Agreed resignations and appointments, drafted written resolutions, and the articles checked for any provision that constrains the group's ability to appoint or remove directors.
• Bank mandate and KYC. Named signatories, authority limits, dual authorisation rules and the bank's own onboarding timetable. This is consistently the longest lead item and should be opened at exchange, not at completion.
• Delegated authority matrix. A single document mapping spend, contract, payroll and banking limits to named roles, aligned to the parent's matrix rather than copied from the seller's.
• Statutory filings. Companies House updates for director and secretary changes, the PSC register reconciled to the new ownership chain, and confirmation statements diarised.
• Insurance. Notification to the group's broker, D&O cover extended or replaced, and any policy that lapses on change of control identified early.
• Change-of-control clauses. Key customer, supplier, lease and licence agreements reviewed for consent requirements that could be triggered by completion.

The first fortnight: signatures that unlock everything

Completion day itself should produce a short, dated pack: board minutes appointing the new subsidiary directors, the sealed authority matrix, the bank mandate instruction acknowledged by the bank, and a named integration lead with a written remit. Nothing in that pack should require interpretation.

Where the bank cannot move quickly, agree an interim arrangement in writing — typically a transitional period in which one former signatory retains a limited, time-boxed authority. Informal workarounds are the item most likely to be discovered later by an auditor, and the hardest to evidence after the fact.

Weeks two to six: money moving between entities

Once the entity can pay its own bills, the next question is how it will be funded and charged. This is where intercompany arrangements earn their place.

Agree, in writing and before the first management charge is raised: the basis for shared services and central function recharges; any intra-group loan, its term and interest basis; the group treasury policy as it applies to the subsidiary; and the transfer pricing documentation that supports the recharge methodology. Groups with cross-border subsidiaries should confirm the position early enough for the local adviser to review it in the same quarter.

A subsidiary funded informally through ad hoc parent transfers is not a controlled entity. It is a suspense account with employees.

People and payroll: the cycle that cannot slip

Payroll is the item with the least tolerance for error. Confirm the cut-over date and who runs the first cycle; the RTI submission and PAYE scheme position; pension auto-enrolment arrangements and staging dates; holiday and benefits carried across; and any TUPE obligations arising from the transaction. A missed payday in month one is remembered by the workforce long after the integration slide deck is forgotten.

Reporting lines and the management information spine

Integration is not complete until the subsidiary reports on the group's calendar, in the group's format, through a named individual. Set out who the subsidiary managing director reports to, who attends the group board, which consolidation pack is used, and when the first full monthly submission is due. Covenant reporting obligations should be mapped at the same time, particularly where the acquired entity sits inside a borrowing group whose covenants are tested on combined figures.

A hundred-day register

A workable structure is three gates:

• Day one: directors appointed, bank mandate instruction live or interim authority documented, authority matrix approved, insurance confirmed, integration lead named.
• Day thirty: intercompany agreements signed, first payroll cycle completed under group control, reporting calendar adopted, statutory filings made.
• Day one hundred: first full monthly pack reviewed by the group board, delegated authorities tested, covenant reporting confirmed, integration risks closed or escalated.

Assign an owner, then test the controls

The register needs a single accountable owner — usually the group finance director with the integration lead — and a standing item at the parent board until day one hundred. Then test it. Ask the acquired finance manager to raise a payment, engage a supplier and hire a starter, and observe where the process stalls. The stalls are the integration risk, and they are always cheaper to find in week three than at the first-year audit.

Haslett Group advises mid-market groups on entity governance and post-acquisition integration. This article is general commentary and not a substitute for advice on a specific transaction.