Buying a block of fees vs building client acquisition: which route actually suits your firm
One route gives you revenue on day one and a transition to manage. The other gives you an asset that keeps producing once it is working. We think most firms under a few hundred clients should build first, and here is the reasoning.
Every owner of a growing practice eventually sits with the same two options on a notepad. Buying a block of fees vs building client acquisition. One is a cheque and a handover. The other is a system you have to stand up, staff and keep running.
Most of the writing on this subject treats it as a financing question. How much capital, what structure, which lender. That matters, but it skips the part that decides whether the decision was right three years later: what do you still own when the money is spent.
Our view, having worked with over 70 accounting firms in the UK and US, is that a purchased book is a one-off addition that starts shrinking the moment it lands, and an acquisition system is the thing that replaces what shrinks. If you can only fund one, build the system. Below is how we compare the two on cost per client, funding, integration and client quality.
The real comparison is cost per client
A fee block is usually priced off gross recurring fees. You pay a multiple, you get a list. The cost per client is fixed on the day you sign, and you can calculate it in a minute: price divided by the number of clients who actually stay.
That last part is where the maths moves. If you price the deal on the full list and a slice walks in year one, your real cost per client rises accordingly. A buyer who loses a meaningful share of the book has quietly paid a third more per surviving client than the deal sheet said.
Client acquisition works the other way. The first few clients are expensive because you are paying for the build: the pages, the ad creative, the booking process, the follow-up. The cost per client falls as the system matures, because the second month of search visibility costs less to produce than the first. One of our client campaigns produced 154 enquiries in a year, up from three to six a month, on a search footprint that keeps working whether or not anyone is actively managing it that week.
So the honest framing is not cheap against expensive. It is a fixed, front-loaded cost per client against a declining one.
What you own when the money is spent
This is the question we would put first if an owner only had one.
After a fee block purchase, you own a set of client relationships you did not create and cannot reproduce. If the book performs, you have bought yourself time. If it shrinks, you have no mechanism to replace what went. The only lever you have is to buy another one.
After building acquisition, you own the mechanism itself. Pages that rank. Ad accounts with spend history and audience data. A list of people who have raised a hand. A booking process that puts qualified leads into the diary. A follow-up sequence that converts a share of them. Across 11 client sites we track, that sort of search work has produced over 160 page-one Google rankings (Google UK, DataForSEO, 30 October 2026). None of that disappears when a client leaves.
There is a second-order effect that rarely gets costed. A firm with working acquisition is a better buyer later. You can integrate a book faster, you can afford a higher multiple because attrition hurts less, and you have a plan for the clients who do not stay. The system makes the acquisition safer, which is the opposite of how most owners sequence it.
A purchased book starts shrinking the day it lands. An acquisition system is the thing that replaces what shrinks. Build the one that keeps producing, then buy from a stronger position.
Funding, and what each route demands of you
A purchase needs capital or lending, and it needs it in one go. UK deals are commonly staged with an upfront payment and a balance tied to retained fees over the following year or two. US buyers often use SBA 7(a) lending, where a minimum equity injection applies and the rules were updated again on 1 October 2026, so confirm the current position with your lender before you make an offer.
Either way, you are committing money before you know what the book is worth to you. The deal structure can soften that, and a sensible clawback on first-year losses is worth negotiating, but it cannot remove the risk.
Building asks for something different. Less capital, more attention, spread over months. That is a harder sell to a practice owner in January, because the cost is visible immediately and the return is not.
The way we handle that is to put the target in writing before anyone signs. We work on one small monthly fee, plus a share of the fees from clients we sign. Guaranteed to work, or a full refund. If the target is missed at day 90, every fee comes back and you keep everything we built. That changes the funding question, because the downside is bounded in a way a purchase price never is.
Integration and client quality decide the outcome
Nobody buys a fee block because they want a project. You get one anyway.
Every transferring client needs fresh agent authorisation, a new engagement letter, and an AML file rebuilt under your firm. Dozens of those at once is a real workload, and it lands on the same people who are already delivering. The acquisitions that go well tend to look the same: the outgoing accountant stays visible for a few months, a joint letter goes out in the first week, and engagements are re-signed inside two months. The ones that go badly are the quiet ones.
Then there is fit. A purchased book is somebody else's selection. It will contain clients outside your niche, clients on fees that have not moved in years, and clients who only ever wanted the person who sold them. You inherit the mix as it is.
A built pipeline is selected by you. You choose the niche, the message, and the qualification criteria, and you decline what does not fit. Onboarding is handled by automation that runs the same way every time rather than by a scramble. That is the quality argument, and over several years it tends to outweigh the speed argument.
When buying is the right call
We are not against acquisition. There are three situations where it is clearly the better use of money.
- You have capacity you cannot fill fast enough. Qualified staff sitting idle is an expensive problem, and a book fills seats in weeks rather than months.
- The book is genuinely adjacent. Same niche, same software, same fee level, same working style. Integration cost drops and attrition drops with it.
- The seller is staying for a real handover and the structure protects you if clients leave. A deal with the seller gone on completion day is a different product entirely.
Outside those cases, the cheque buys a result that decays. Buying a block of fees vs building client acquisition is really a question about what you want to be holding in year three, and acquisitions bought without a working pipeline tend to leave the owner back where they started, just with less cash.
If you are weighing both and the capital is finite, build the system, then buy from a stronger position.
Our take
If you can fund both, do both, in that order. If you can fund one, build the acquisition system first. A fee block adds revenue once; a working pipeline adds it every month and makes any future purchase less risky.
The nuance is capacity. A firm with people sitting idle has a different problem from a firm with a full diary and no inbound, and a well-matched book solves the first one faster than marketing will.
We run the whole acquisition function as one system: digital marketing, appointment setting, fractional sales and technical AI onboarding agents, measured in pipeline value. Pipeline value is modelled, qualified leads multiplied by your average annual fee per client, so it measures opportunity rather than booked revenue. If you are comparing the two routes this quarter, we are happy to talk it through.
Common questions
Is buying a block of fees faster than building a pipeline?
Faster to revenue, yes. A book bills from the first month. A pipeline takes time to produce its first signed client, usually a quarter before the figures look sensible. The difference narrows after year one, because the book stops growing on its own while the pipeline keeps producing.
How do I work out my real cost per acquired client?
Take the price you paid and divide it by the number of clients still with you after twelve months, not the number on the list at completion. Add the staff hours spent on re-authorisations, engagement letters and AML files. That figure is the one to compare against what a built pipeline costs you per signed client.
Can a firm run an acquisition build and an acquisition at the same time?
Yes, and it works better than either alone, provided the integration work is resourced separately. The risk is that the same senior people own both. Transition admin is time-sensitive and marketing is not, so marketing gets dropped. Keep the two workstreams on different people.
What happens to a purchased book if clients were loyal to the seller?
Some will leave regardless of how the handover is run. You reduce that with a joint announcement in the first week, a personal introduction from the outgoing accountant, a visible seller for the first few months, and no fee increases in year one. You cannot remove it, which is why the deal structure should account for it.
Does the guarantee apply if we are also buying a practice?
It applies to the work we do. Your target is written into the agreement before you sign. If we miss it at day 90, every fee comes back and you keep everything we built. What happens with a separate acquisition sits outside that, though a working pipeline usually makes the integration easier.