An accepted offer is not a sale. Between heads of terms and completion sits months of due diligence, legal drafting, regulatory process and ordinary human wobble, and a meaningful proportion of deals that start that journey never finish it. The frustrating part is that most collapses are predictable. They come from a short list of causes, each with an early-warning sign that shows up well before the deal dies, and each with a prevention that costs far less than a failed sale.
A failed deal is not a neutral event you can shrug off and rerun. You have spent professional fees, burned six months of management attention, told at least some people more than you intended, and, if word travels, your firm re-enters the market carrying the question every buyer will ask: why did the last one fall over? So it is worth knowing the list. Here it is, honestly, with what to watch for and what to do about each.
1. Due diligence surprises
The single biggest killer. The buyer's diligence process exists to test whether the firm they offered for is the firm that actually exists, and when it finds something the seller did not disclose, two things happen at once. The finding itself gets priced, and the seller's credibility gets repriced with it. A complaint you mentioned upfront is a fact; a complaint the buyer's team discovers is a reason to wonder what else they have not been told.
The usual surprises in advice firm deals are complaints history, defined benefit transfer advice, and gaps in the client file record. DB transfer history deserves particular respect: buyers treat it as a long-tail liability question, it drives the run-off cover conversation, and discovering it late can stall a deal entirely while the buyer's compliance function works out its exposure. The FCA has also been explicit, in its expectations of firms selling client banks, that it will act where client banks are sold with redress liabilities left behind, so a buyer who finds undisclosed liability is not just negotiating, they are managing their own regulatory position.
The early-warning sign is your own hesitation. If there is anything in the firm's history you are hoping will not come up, it will come up, and the hope itself is the signal. The prevention is disclosure before diligence: run your own review first, list every complaint, every piece of DB advice, every client file you know is thin, and put it in front of the buyer with your explanation attached. Bad news you deliver is context; bad news they find is a price chip or an exit. The state of your back book records matters here too, because data quality is itself a price factor, and a clean, complete record set is the cheapest credibility you will ever buy.
2. The price gap
Plenty of deals die before diligence even starts, because the seller's number and the market's number were never going to meet. Owners anchor on a figure heard at a conference, a rumour about what a rival got, or simply the number their retirement plan needs. Buyers anchor on recurring income, client demographics and risk. When those two anchors sit a full turn of recurring income apart, no amount of negotiation closes the gap; the deal just erodes until one side walks.
The market data is public enough that there is no excuse for a fantasy number. Gunner & Co reported average recurring-income multiples of 4.2x in the first half of 2025, up from a stable level of around 3.5x across 2023 and 2024, and noted that the premium goes to well-prepared firms. That is a range, not a promise, and where your firm sits inside it depends on the things covered in what raises your multiple.
The early-warning sign is that you cannot explain your asking price from your own numbers. If the only justification is what you have heard someone else got, the price is a wish. The prevention is to build the valuation from your recurring income and your firm's actual characteristics before you speak to anyone, and to stress-test it against more than one source. A seller who can show the working behind their number negotiates; a seller who cannot, defends.
3. Client attrition during a long deal
Deals take months, and a firm under offer is a firm slightly distracted. Reviews slip, proactive contact drops, and clients notice. If the deal then completes against a client bank that has visibly shrunk since the offer was made, the buyer either reprices or walks, because the asset they offered for has changed underneath them. Where consideration is deferred or earned out, attrition during the deal also eats directly into what you eventually receive.
The early-warning sign is internal, not external: review completion rates and client contact activity dipping in your own management information. Clients rarely announce they are drifting; they just stop responding, and then a competitor calls them. The prevention is to run the firm through the deal as though there were no deal. Ring-fence the transaction work to specific people and specific hours, keep the review calendar sacrosanct, and measure client activity monthly during the process exactly as a buyer will measure it at completion. This is also an argument for keeping the process as short as your preparation allows, and preparation is most of it, which is what the 24-month plan exists to front-load.
4. Key staff leaving
In a people business, the advisers and the senior administrator who actually knows where everything is are part of what the buyer is paying for. An adviser resigning mid-deal, particularly one with strong personal relationships with a segment of the client bank, changes the buyer's attrition assumptions overnight. Worse, staff who feel deceived when they eventually find out about the sale are staff with one foot out of the door at precisely the moment the buyer is assessing them.
The early-warning sign is secrecy curdling into rumour. If people are whispering about closed-door meetings and unexplained visitors, you have lost control of the narrative without gaining the benefit of disclosure. The prevention is a deliberate communication plan: decide early who needs to know, when, and what is in it for them. Retention arrangements for genuinely key people, agreed with the buyer, are normal and cheap relative to the value they protect. The timing and mechanics deserve their own thought, and telling your staff covers them properly.
5. Buyer funding falling through
Not every collapse is the seller's fault. Plenty of buyers in this market are acquisitive because they are backed by external capital, and that capital comes with conditions. The FCA's multi-firm review of consolidation, published on Fri 31st Oct 2025, raised specific concerns about debt-funded acquisitions and the pressure on regulated firms required to move cash upstream to service external debt. A buyer whose funding model is stretched is a buyer whose next deal, possibly yours, is the one that does not complete.
The early-warning sign is a buyer who is vague about where the money comes from, or whose timeline keeps slipping for reasons attributed to "the funders". Slippage blamed on people you have never met is a funding problem wearing a scheduling costume. The prevention is to run diligence both ways. Ask directly how the acquisition is financed, whether funds are committed or conditional, and what happens to deferred consideration if the buyer's group hits trouble. A serious buyer answers these questions without offence; a defensive answer is itself the answer. If part of your price is deferred, the buyer's financial strength is your problem for years after completion, which is why protecting deferred consideration matters as much as agreeing it.
6. Regulatory approval delays
A share sale of a directly authorised firm involves the regulator approving the change in control, and that process runs on the FCA's clock, not the deal's. The FCA also expects to be told about transactions that could affect a firm's risk profile, value or resources through a SUP 15 notification, as set out in its client bank sale expectations. Approval processes that start late, or that surface questions the buyer's application did not anticipate, add months. Deals do not usually die of the delay itself; they die of what the delay gives time for: attrition, staff drift, market movement, and cold feet on either side.
The early-warning sign is a transaction timetable with no regulatory workstream on it. If nobody has named the person responsible for the change in control application by the time heads of terms are signed, the delay is already booked. The prevention is to treat the regulatory process as a workstream from day one, with the application prepared early and the notification obligations mapped. Structure matters here too: an asset sale and a share sale carry different regulatory mechanics, and that difference belongs in the structure decision, not discovered after it.
7. Seller cold feet
The quietest deal-killer, and the one nobody budgets for. Somewhere around the exchange of contracts, the reality lands: the firm you built, your name, your clients, your reason for getting up on a Monday, actually transferring to someone else. Sellers who have not done the personal work stall. They slow down on documents, reopen settled points, find new conditions. Buyers read this accurately, and buyers who conclude the seller does not really want to sell stop spending money on the process.
The early-warning sign is your own behaviour: if you notice yourself relitigating terms you already agreed, the problem is not the terms. The prevention is to answer the after question before you start, not during diligence. What does the first year after completion look like for you, financially, professionally and personally? What are you retiring to, rather than from? An owner with a real answer negotiates calmly and completes on time. The shape of the first year after completion is worth thinking through in detail long before anyone signs anything.
The pattern behind the list
Read the seven causes again and one pattern emerges: almost every collapse is a preparation failure surfacing late. Undisclosed history, an unsupported price, fragile client relationships, uninformed staff, an unexamined buyer, an unplanned regulatory workstream, an unexamined seller. Each is cheap to fix eighteen months out and expensive or fatal to fix mid-deal. That is the core argument of the whole getting sale ready discipline: the work is the same either way, and the only choice is whether you do it calmly in advance or under pressure with a buyer watching.
The place to start is with an honest view of what the firm is worth today, built from your own recurring income rather than conference-bar folklore, because a realistic number prevents the second collapse cause outright and softens most of the others. If you want a figure of your own to react to, the free IFA valuation calculator gives you a range and explains the factors affecting it.