Fee Block Finance: How Accountancy and Advisory Practices Fund Buying a Client Book

What a fee block is, and why practices buy them

A fee block is a portfolio of client relationships, and the recurring fees attached to them, bought from another practice without acquiring the seller’s whole business. Sellers are often sole practitioners approaching retirement, firms refocusing on a narrower service line, or partners exiting a larger practice. Buyers are typically established accountancy, bookkeeping, payroll, tax or advisory firms that want to grow faster than organic marketing allows.

The attraction for a buyer is straightforward: an established client base with a record of paying for compliance and advisory work, which can be absorbed into existing systems and staff capacity. The risk is equally clear. Clients are not assets that can be fenced in. They choose to stay or leave, and the value of the purchase depends on how many remain once the relationship moves to a new firm. Everything about how fee blocks are priced, structured and financed flows from that single point.

Fee block purchases sit alongside whole-practice acquisitions within practice acquisition finance. If you are buying a limited company or partnership with staff, premises and contracts, our guide to buying a professional practice covers the wider picture. This guide concentrates on the narrower transaction of buying a client book.

How fee blocks are typically priced

Fee blocks are commonly priced as a multiple of the recurring annual fees they generate. There is no fixed market multiple, and anyone quoting one without seeing the book should be treated with caution. The multiple agreed in any given deal reflects a range of qualitative factors, and it is worth understanding each one because they are also the factors a lender will examine.

• Recurring versus one-off fees. Annual accounts, tax returns, payroll and bookkeeping retainers are valued more highly than project work or one-off advisory fees, because they are expected to repeat.
• Client concentration. A book where a handful of clients make up much of the income carries more risk than one spread across many smaller clients.
• Fee levels and profitability. Clients billed at fees below the buyer’s own pricing may need repricing, which can prompt departures. Clients who require heavy partner time may be less profitable than their fees suggest.
• Relationship dependency. Where clients are loyal to an individual rather than a firm, retention after transfer is harder to predict, and a handover period with the seller becomes more important.
• Service fit. A book that matches the buyer’s existing services and software transfers more easily than one requiring new specialisms.
• Geography and sector. Local books suit practices that value face-to-face relationships; sector-concentrated books can be valuable to a specialist but more exposed to a downturn in that sector.

The headline price is only half the story. The same nominal multiple can mean very different things depending on whether it is paid upfront, spread over time, or linked to the fees actually retained. That is where retention, clawback and deferred consideration come in.

Retention, clawback and deferred consideration

Because client retention is uncertain, fee block agreements usually include a mechanism to adjust the price according to what is actually retained. The terminology varies, but the principles are consistent.

• Retention-based pricing. The final price is calculated by reference to the fees billed to transferred clients over an agreed period after completion, rather than the fees billed before the sale.
• Clawback. Where some of the price is paid upfront, the seller agrees to repay part of it if clients leave within a set period.
• Deferred consideration. Part of the price is paid in instalments after completion, often out of the fees generated by the acquired clients. This spreads the cost and aligns the seller’s interest with a smooth handover.
• Earn-out elements. Less common in pure fee block deals, but some agreements tie part of the price to the seller’s continued involvement or to cross-selling targets.

From a funding perspective, these mechanisms matter because they change how much cash the buyer needs on day one and how much risk remains with the seller. A lender will usually read the sale agreement closely. A deal with a sensible deferred element and a credible clawback is generally easier to finance than one where the full price is paid upfront, because the seller has shared the downside of client losses. Conversely, deferred consideration is itself a liability, and lenders will factor those future payments into their assessment of affordability.

The legal drafting of these clauses, and their tax treatment for both buyer and seller, is specialist territory. Take advice from your solicitor and accountant before agreeing heads of terms.

Due diligence on the book

Due diligence on a fee block is lighter than on a whole practice, but it should still be thorough. The aim is to confirm that the fees are real, recurring and transferable, and to identify anything that would affect retention or create liabilities.

• Fee analysis by client. Several years of billing by client and service line, showing which fees recur and whether they have been rising, stable or declining.
• Debtor and WIP position. Whether clients pay promptly, and whether any unbilled work or old debts are included or excluded from the sale.
• Engagement letters and terms. Whether engagement letters are current, what services are covered, and how fees are agreed.
• Client profile. Sector mix, entity types, complexity and any clients that fall outside the buyer’s risk appetite or anti-money laundering procedures.
• Complaints and claims. Any history of complaints, disputes or matters that might give rise to a professional indemnity claim, and how the seller’s run-off cover will respond.
• Staff. Whether any employees transfer with the book, which may bring employment protections into play.
• Data and confidentiality. How client information will be shared during diligence and transferred on completion, consistent with professional ethics and data protection obligations.

ICAEW publishes a helpsheet on buying and selling fees that covers the ethical and client confidentiality issues involved, and a wider hub on buying or selling an accountancy practice. Where staff move with the book, the TUPE rules on GOV.UK explain how employees’ terms and continuity of employment can transfer to the new employer. Client data handling should follow the data protection obligations for businesses. Your solicitor will advise on how these apply to your transaction.

Funding structures for a fee block purchase

Most fee block purchases are funded from a combination of sources. The right blend depends on the size of the deal, the buyer’s existing borrowing, the strength of the combined practice and how much of the price is deferred.

• Term loan. A loan repaid over an agreed term, sized against the recurring fees acquired and the combined practice’s cash flow. This is the most common external funding route and is often described as fee block finance or goodwill finance.
• Deferred consideration from the seller. Effectively seller finance. It reduces the external borrowing needed but must be serviced alongside it.
• Buyer’s own funds. Retained profits or partner capital. Lenders generally look more favourably on a buyer who is contributing to the deal.
• Working capital facility. An overdraft, revolving facility or working capital line to cover integration costs and the lag before acquired clients are billed.
• Refinancing existing debt. Sometimes the cleanest structure is to refinance existing borrowing and the new purchase into a single facility with one repayment profile.

Security requirements vary. Some lenders in the professions market will consider fee block purchases on an unsecured basis supported by personal guarantees from the principals, while others may take a debenture over the practice or look for additional security for larger transactions. Lenders set these terms case by case, and all finance is subject to status, lender criteria and approval.

Where the buyer is a sole trader or a small partnership, finance of £25,000 or less can be regulated consumer credit. We will say at the outset if that applies to your case. Our guide to consumer credit and practice finance explains the distinction.

What lenders assess

Specialist professions lenders and high-street and challenger banks that understand practice finance tend to look at a fee block purchase through three lenses: the quality of what is being bought, the capability of the buyer, and the affordability of the combined practice.

• Quality of the fees. The recurring proportion, client concentration, sector mix and billing history. Lenders are more comfortable where fees are predictable and spread across many clients.
• Deal structure. How the price is calculated, what is deferred, and whether clawback or retention-based pricing protects the buyer if clients leave.
• Buyer’s track record. Experience in the relevant services, any previous acquisitions and how well they were integrated, and the depth of the team.
• Capacity. Whether the buyer has the staff, systems and management time to service the new clients without losing existing ones.
• Serviceability. Whether the combined practice’s cash flow comfortably covers existing commitments, the new loan and any deferred consideration, including under a cautious view of retention.
• Financial management. Lock-up, debtor collection, tax position and whether there are arrears with HMRC or other creditors.

Lenders will usually ask for the buyer’s recent accounts and management information, a schedule of the fees being acquired, the draft sale agreement and a short explanation of how the clients will be integrated. Our guide to preparing a practice finance application sets out what to gather and how to present it.

Integration and cash flow in the first year

The period immediately after completion is when fee block acquisitions most often run into cash flow pressure, even when the deal is sound. The reasons are predictable, which means they can be planned for.

First, there is often a lag between taking on clients and billing them. Compliance work follows year-ends and filing deadlines, so fees from acquired clients may arrive unevenly, while loan repayments start on a fixed schedule. Second, integration has a cost: engagement letters, onboarding and anti-money laundering checks, data migration, software licences and possibly additional staff. Third, some clients will need repricing or a change in service, and that conversation can take time.

A cash flow forecast built month by month for the first year, showing when acquired fees are expected to be billed and collected alongside all repayments and deferred consideration, is one of the most useful documents a buyer can prepare. It helps set the loan’s repayment profile, shows whether a working capital facility is needed, and gives lenders confidence that the buyer has thought beyond completion. If lock-up is already a challenge in your practice, our guide to reducing lock-up is worth reading before you take on more clients.

Mistakes to avoid

• Paying for fees that are not recurring. One-off projects and irregular advisory work inflate the apparent value of a book.
• Underestimating client attrition. Some clients will leave when their accountant changes. Price and structure the deal so that a cautious retention outcome is still affordable.
• Relying solely on upfront payment. Without deferred consideration or clawback, all retention risk sits with the buyer and, indirectly, with the lender.
• Ignoring capacity. A book that stretches the team too far can damage service to existing clients.
• Arranging finance too late. Leaving funding until heads of terms are signed can create avoidable pressure. Speaking to a broker early helps you understand what is achievable before you commit.
• Forgetting working capital. Funding the purchase price but not the integration period is a common cause of strain.
• Overlooking professional obligations. Confidentiality, professional clearance, data handling and anti-money laundering checks all need to be addressed properly.

How we can help

We are a whole-of-market commercial finance broker with access to 300+ lenders, including specialist professions lenders that understand how accountancy and advisory practices are valued. We review the proposed deal, help you think through the structure, and approach suitable lenders with a clear presentation of the fees being acquired, the retention protections and the combined practice’s cash flow. We then manage the process through to completion.

To discuss a fee block purchase, see how it works, read more about fee block finance and our work with accountancy practices and financial advisory firms, or make an enquiry.

Common questions

This guide is for general information only and should not be treated as legal, tax, accounting or financial advice. Funding availability and lender requirements depend on individual circumstances.