PI insurance in practice acquisitions — buyer-side due diligence and cover structuring

A professional firm acquisition brings a book of clients, revenue and files — but also a tail of potential liability that outlives the completion date. This page covers what a buyer's specialist broker looks at in a practice acquisition: run-off due diligence on the seller, successor-practice rules under the profession's regulator, and how PII is restructured post-completion.

The buyer's risk in a professional-firm acquisition

The buyer inherits either the shell (share purchase) or the goodwill and specified assets (asset purchase). Either way, past-act liability can attach to the buyer if the transaction is structured as a ‘successor practice’ under the relevant regulator's rules.

1. Share purchase — the buyer acquires the shares of an existing entity; the entity carries its own historic liabilities and PII record.
2. Asset purchase — the buyer acquires named assets and takes on named liabilities; successor-practice rules may still deem the buyer a successor for regulatory purposes.
3. Merger — the two firms combine; the combined entity is typically a successor to both.

Successor-practice rules by profession

1. SRA (solicitors) — SRA Handbook and MTC clause on successor practice; a firm can be a successor by carrying on the same or substantially similar business.
2. ARB (architects) — ARB Standard 8 and the ARB Framework treat successor practices under general PII adequacy standards.
3. ICAEW (accountants) — ICAEW Bye-law 61 continues to apply; run-off obligations of the ceased firm transfer or remain with the ceded entity depending on structure.
4. RICS (surveyors) — RICS Rules of Conduct Rule 9 requires adequate PII; successor treatment follows RICS guidance.
5. FCA-authorised firms — regulator-specific treatment under SMCR / SUP 15 / individual permissions.

Buyer-side due diligence checklist

1. Full claims and notification history from seller's PII policies for the last 6-10 years, including quantum, reserves and status.
2. Copies of seller's PII policies for the past three years to review terms and any exclusions.
3. Confirmation of seller's run-off cover arrangements — who provides it, for how long, for what limit.
4. Insurer's consent to any transfer of cover or novation of policy.
5. Notifications given by seller in the six months pre-completion — typically these attach to the outgoing policy.
6. Complaint records under DISP or the profession's complaints framework.
7. Any regulator engagement or supervisory correspondence.
8. Financial resilience of the seller against a claim tail — solvency of the ceded entity.

Structuring the buyer's PII

1. Extend buyer's existing PII to include the acquired book's prior acts — requires insurer consent, usually attracts a premium loading.
2. Alternatively, seller carries run-off cover for pre-completion acts; buyer's PII only responds to post-completion acts.
3. Layered approach — seller run-off as the primary for pre-completion, buyer's policy as excess.
4. Successor-practice provisions in the SRA MTC or equivalent trigger regulatory treatment even where insurance is structured on the seller-carries-run-off basis.

Common pitfalls

1. Buyer discovers post-completion that seller failed to maintain run-off — buyer left carrying uncovered tail.
2. Buyer's PII policy declines to cover acquired book's prior acts because inheritor risk was not disclosed at renewal.
3. Successor-practice status triggers regulator obligations the buyer did not anticipate.
4. Fair-presentation duty at buyer's next renewal — acquisition and its history must be disclosed.
5. Consumer Duty implications for acquired client relationships.

Timing

1. 6-12 months pre-completion — engage buyer's specialist broker to structure the PII conversation into the SPA.
2. 3-6 months pre-completion — PII due diligence run on seller.
3. 1-2 months pre-completion — buyer's new-firm PII quotes or extension quotes obtained.
4. Completion day — buyer's PII incepts (or extended existing policy takes effect); seller's run-off begins.
5. Post-completion — monitor for claims emerging from acquired book; notify per policy.

Frequently asked

Related reading

• Run-off cover on practice sale — the seller's playbook
• Successor practice PII — regulatory framework
• Run-off UK umbrella pillar
• SRA Handbook and MTC deep dive