A · Planning & eligibility
Buying an Accountancy Practice or Fee Block: A UK Buyer's Guide
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Quick answer
Accountancy practices and fee blocks typically sell for a multiple of gross recurring fees, often in the region of 0.8x to 1.3x [VERIFY], adjusted for client mix, retention risk and staff. Buyers should carry out due diligence on client contracts, fee history, staff and AML records before agreeing a deal structure, which is commonly staged with deferred consideration linked to retention.
Key takeaways
- Practices and fee blocks are usually valued on a multiple of gross recurring fees, not profit.
- Retention risk after transfer is the single biggest driver of price and deal structure.
- Due diligence should cover client contracts, fee history, staff, leases, AML files and professional indemnity claims history.
- Deferred and earn-out structures protect the buyer against client attrition post-completion.
- Professional clearance and clean client communication are essential during transition.
- Bulk onboarding into your systems quickly reduces the risk of losing acquired clients in the first year.
How are accountancy practices and fee blocks valued?
Most deals are priced as a multiple of gross recurring annual fees rather than profit, because buyers are really purchasing the client relationships and recurring revenue stream.
Unlike many businesses valued on EBITDA multiples, small accountancy practices are commonly valued on turnover, specifically gross recurring fees (compliance and repeat advisory work), because that is what a buyer is actually acquiring: the right to serve an existing client base.
| Factor | Effect on multiple |
|---|---|
| Long-tenured, loyal clients | Increases multiple |
| High client concentration (few large clients) | Decreases multiple |
| Modern, cloud-based clients (MTD ready) | Increases multiple |
| Fee arrears or write-offs | Decreases multiple |
| Seller staying on to support transition | Increases multiple |
| Ageing client bank, paper-based records | Decreases multiple |
Any specific multiple you see quoted should be treated as indicative only [VERIFY] since deals vary widely by region, sector mix and structure.
What due diligence should I do before buying?
Review client contracts, fee history and recoverability, staff terms, AML files, PI claims history, lease obligations and the reasons for sale before agreeing a price.
- Client-by-client fee schedule with billing history for at least the last two to three years.
- Engagement letters and evidence they are current and signed for each client.
- AML client due diligence files: are they complete, current and would you be comfortable inheriting them as-is?
- Staff contracts, TUPE implications if employees transfer with the deal, and any restrictive covenants in staff contracts.
- Professional indemnity insurance history and any outstanding or historic claims or complaints.
- Reason for sale: retirement, ill health, merger, or declining client base, each carries different retention risk.
- Lease terms if premises are included, and any tie-ins to software or referral arrangements.
How should the deal be structured?
Most fee block sales use a staged structure with an initial payment on completion and deferred consideration tied to client retention over the following one to three years.
Because the biggest risk to the buyer is clients leaving after the change of ownership, sellers are often paid partly upfront and partly based on fees actually retained and billed over a defined retention period. This aligns incentives: the seller is motivated to support a smooth handover, and the buyer isn't left overpaying for clients who disappear.
- Agree an initial multiple based on due diligence findings.
- Set an upfront payment, commonly 40-60% [VERIFY] of the agreed price on completion.
- Structure the balance as deferred payments linked to retained gross fees at 12 and 24 months.
- Document warranties covering accuracy of client lists, fee data and absence of undisclosed liabilities.
- Agree the seller's role during transition: introductions, joint client meetings, and availability for queries.
How do I transfer clients smoothly after completion?
Communicate early with a joint letter from buyer and seller, seek professional clearance where relevant, and prioritise re-signing engagement letters and re-authorising HMRC agent access quickly.
Client attrition happens most often when the transition feels sudden or poorly explained. A joint announcement, ideally including a personal introduction from the outgoing accountant, reassures clients and reduces the temptation to shop around.
Operationally, you will need to re-authorise HMRC agent access for each client, issue new engagement letters, and rebuild each client's AML risk assessment and CDD file under your own firm rather than simply relying on the seller's paperwork.
How do I onboard a large block of clients at once without losing control?
Batch onboarding with a checklist and clear task ownership prevents details being missed when dozens of clients transfer at once.
The volume of admin in a fee block acquisition, engagement letters, AML checks, agent authorisations, service setup, is far higher than onboarding one new client at a time. Treating it as a project with a standard checklist per client, tracked centrally, avoids clients falling through the cracks in the first few months.
What are common mistakes when buying a practice?
Overpaying for a concentrated or ageing client bank, skipping AML due diligence, and underestimating the admin burden of a bulk transition are the most frequent issues.
- Assuming quoted fee levels are still being billed and collected in full.
- Not checking whether key clients are personally loyal to the departing accountant rather than the firm.
- Failing to budget time and staff capacity for the transition period.
- Inheriting incomplete AML files without a plan to refresh them promptly.
How Remindoo helps
A fee block acquisition means bringing many clients into your systems at once, which is exactly where a structured onboarding process earns its keep. Remindoo's client onboarding automation lets you apply the same checklist, engagement letter and first-task setup to every acquired client, so nothing gets missed in the rush of a bulk transition. Each client then sits in Remindoo's client management area as one searchable record, with Companies House sync, notes and a timeline, giving you and any staff who transfer with the deal a single source of truth from day one, rather than relying on the previous firm's paper files or spreadsheets.
Frequently asked questions
What multiple do accountancy fee blocks sell for?
There is no fixed rate; deals reflect client quality, retention risk and terms. Any multiple you see quoted should be treated as indicative only and verified against current market data before relying on it.
Do I need to re-do AML checks on inherited clients?
Yes. You should carry out your own client due diligence and risk assessment under your firm's AML supervision rather than relying solely on the seller's historic files.
What is a fee block versus a full practice sale?
A fee block is a subset of clients or a service line sold separately, while a full practice sale transfers the whole business, often including staff, premises and the trading entity.
Should I use deferred consideration?
In most deals, yes. Tying part of the price to client retention protects you if clients leave after completion and gives the seller an incentive to support the transition.
Do I need professional clearance when buying a practice?
Formal clearance is more relevant to individual client moves, but where clients or partners have prior professional relationships, following your body's ethical requirements is good practice.
Can I finance the purchase?
Many buyers use a mix of savings, bank finance and deferred consideration funded from the fees generated by the acquired clients themselves.
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Sources
Last updated 23 September 2026. General guidance, not legal or regulatory advice. Check with your professional body.
