Corporate Finance Insights · March 2026 · 11 min read
When a business owner begins exploring the sale of their company, one of the first practical questions they ask is straightforward enough: what does a corporate finance adviser actually cost? It is a reasonable question, and one that surprisingly few advisory firms answer transparently on their websites.
This post does exactly that. It sets out the typical fee structures you will encounter, the percentage ranges and retainer figures you should expect to see, and what those fees should include. But it goes further than that, because the cost of appointing a corporate finance adviser is only half the question worth asking. The other half is what you are actually getting for that cost, and whether the firm presenting you with a fee proposal has the qualifications, experience, and depth to deliver what they are charging for.
In a market where advisory fees are broadly similar across firms of very different quality levels, understanding the difference between what you pay and what you receive is the most commercially important thing a business owner can do before signing a mandate.
How Corporate Finance Advisers Charge: The Three Main Fee Structures
Corporate finance advisory fees for business sales are typically structured around three components, either individually or in combination. Understanding each one helps you evaluate any proposal you receive on a like for like basis.
The Retainer Fee
A retainer is an upfront or monthly fee charged to commence and maintain the advisory engagement. It covers the work done before a transaction completes, including preparation of your financial information, construction of your adjusted EBITDA schedule, drafting of your information memorandum, buyer research, and the initial phases of outreach and process management.
Retainer fees for mid-market business sales in the UK typically range from £2,000 to £10,000 per month, or as a fixed upfront payment of between £5,000 and £25,000 depending on the complexity of the business and the scope of the preparation work involved. Some firms charge a single upfront preparation fee rather than an ongoing monthly retainer, which is common where the preparation phase is intensive and time bounded.
The retainer serves an important function beyond simply generating early revenue for the adviser. It aligns incentives by ensuring the adviser is compensated for the substantial work that happens before any deal is signed, and it filters out sellers who are not genuinely committed to a process. An adviser who works entirely on a no retainer, success fee only basis has a strong financial incentive to move quickly toward any deal rather than to invest time in preparation and process quality.
It is highly unlikely a corporate finance firm will turn a profit from the retainer fee – assuming adequate work has been undertaken.
The Success Fee
The success fee, sometimes called a completion fee, transaction fee, success fee or commission, is the primary component of corporate finance advisory remuneration. It is typically calculated as a percentage of the enterprise value of the transaction and is payable on completion.
For UK mid-market business sales, success fees typically fall within the following ranges depending on transaction size. For transactions valued below £5 million, success fees commonly range from 3% to 5% of enterprise value. For transactions between £5 million and £20 million, the range typically sits between 2% and 4%. For transactions above £20 million, fees are often negotiated individually but commonly fall between 1% and 2.5%.
Some advisory firms apply a minimum success fee regardless of transaction value, typically between £50,000 and £100,000, to ensure the engagement is commercially viable for smaller transactions. Others use a tiered or Lehman-based structure where a higher percentage applies to the first tranche of value and a lower percentage to subsequent tranches.
The success fee structure is fundamentally aligned with the seller’s interests in that the adviser only receives their primary payment when the transaction completes. However, the percentage alone tells you very little about the value you will receive. A 3% success fee from a highly qualified, well-connected adviser who runs a genuinely competitive process and achieves a valuation 20% above your expectation is exceptional value. A 3% success fee from an underqualified practitioner who runs a passive process and achieves a mediocre outcome is an expensive disappointment.
The Abort or Break Fee
Some advisory mandates include a provision for a partial fee in the event that a transaction does not complete, particularly where significant work has been completed and a buyer has been identified but the deal fails for reasons outside the adviser’s control. Abort fees are typically a fraction of the success fee and are not universal, but they are worth understanding before you sign a mandate.
What the Fee Should Include: A Comprehensive Scope of Work
Understanding what a corporate finance advisory fee covers in a properly scoped engagement is the foundation for evaluating whether any specific proposal represents genuine value.
A full scope corporate finance advisory engagement for a business sale should include every element of the following.
Financial Analysis and Adjusted EBITDA Construction
The adviser should conduct a thorough review of your financial statements, typically covering three years of accounts, and construct a fully documented adjusted EBITDA schedule. This includes identifying and evidencing all legitimate addbacks, assessing and addressing potential takebacks, and building a normalised earnings bridge that is designed to withstand a buyer’s quality of earnings scrutiny. There are many unqualified practitioners that purport to undertake this role, but a fully comprehensive exercise is technically demanding work that requires qualified financial analysis skills.
Remember, the business sale advisory market is full of low or limited experienced personnel and it is imperative you choose carefully.
Information Memorandum Preparation
The information memorandum is the primary marketing document presented to potential buyers. A well-crafted information memorandum covers the business overview, market positioning, financial history and projections, operational structure, management team, growth opportunities, and the investment case for acquisition. It is a substantial document requiring genuine sector knowledge, financial literacy, and commercial writing ability. The quality of this document directly affects the quality and quantity of buyer interest generated.
Buyer Research and Identification
The adviser should conduct structured research to identify the full universe of potential buyers, including trade buyers, financial buyers, and strategic acquirers, ranked by their likely motivation and ability to pay a premium for your specific business. This is not a database search. It is analytical work that draws on sector knowledge, current market intelligence, and an understanding of which buyers are actively acquiring and why.
Confidential Buyer Outreach and Process Management
The adviser manages all buyer contact throughout the process, including preparation and execution of non-disclosure agreements, controlled distribution of the information memorandum, management of buyer questions and site visits, and coordination of the offer process. This phase requires commercial judgment, relationship management skills, and the ability to maintain competitive tension among multiple buyers simultaneously.
Offer Evaluation and Negotiation
When offers are received, the adviser evaluates them across all dimensions including headline price, deal structure, deferred consideration, working capital treatment, and conditions. They lead the negotiation on your behalf, drawing on comparable transaction data and an understanding of what is achievable in the current market. This is where the difference between an experienced negotiator and an enthusiastic generalist is most immediately visible and most financially consequential.
Due Diligence Management
The adviser coordinates the due diligence process, managing the flow of information to buyers, responding to their advisers’ requests, and ensuring the process does not become an opportunity for post-offer price renegotiation. Experienced advisers anticipate the areas buyers will focus on and prepare clients accordingly, preventing surprises that erode value.
Legal Process Coordination
While the adviser is not a solicitor and does not draft legal documents, they work closely with your legal team throughout the transaction to ensure commercial terms are reflected correctly in the legal documentation, that the wording matches the essence of the transaction, that warranty exposure is appropriately managed, and that the transaction timetable is maintained.
A corporate finance adviser will ensure that the words tied to the numbers accurately reflect what the numbers demonstrate.
Why Fees Can Be Similar Across Firms of Very Different Quality
This is the question that every business owner deserves an honest answer to, and it is one that the advisory market has little incentive to address transparently.
The fee structures described above are broadly consistent across the corporate finance advisory market regardless of the quality of the firm or the individual adviser. A highly qualified, experienced practitioner with a track record of completed transactions in your sector will charge a retainer and success fee structure that looks, on paper, very similar to the fee proposal from a recently established firm staffed by practitioners with limited qualifications and no verifiable transaction history.
The market does not price quality differences effectively because most sellers do not know what questions to ask, and because the consequences of appointing the wrong adviser only become fully apparent deep into a process when it is very difficult to change course.
This creates a specific and largely unacknowledged risk for business owners. You can pay the same fee to two advisers and receive outcomes that differ by hundreds of thousands of pounds, or more, depending on the quality and experience of the person managing your transaction.
It is entirely likely that your low qualified, limited experienced business sale adviser is quoting the same amount as your seasoned practitioner with 20+ years of transactional track record.
The Qualification Gap Behind the Fee Proposal
A significant proportion of advisory firms operating in the UK SME M&A market are run by or staffed with individuals who do not hold recognised professional qualifications in corporate finance or accountancy. They may have a background in business development, sales, or a tangentially related field.
Oddly, the business broker market seems to be overcrowded with ex-estate agents; and the role of progressing a house-sale whereby the conveyancer takes all of the commercial and legal risk is substantially different to running a multi-million pound corporate transaction!
They may have been involved in transactions in a supporting or administrative capacity and have extrapolated that into an advisory proposition. They present well. Their websites are professional. Their fee proposals are structured identically to those of genuinely qualified practitioners as this provides a level of cover – hiding in plain sight, so to speak.
What they cannot replicate is the technical depth that qualified advisers bring to the work that actually determines your outcome. Adjusted EBITDA construction requires financial accounting knowledge. Quality of earnings preparation requires an understanding of how buyers will stress-test every adjustment. Deal structuring requires tax knowledge. Warranty negotiation requires transactional experience. These are not skills that can be acquired through enthusiasm or replicated through surface level familiarity with the terminology.
The practical consequence is that an unqualified adviser managing your transaction will produce a lower quality information memorandum, a less defensible adjusted EBITDA schedule, a less competitive buyer process, and a less effective negotiation. None of this will be visible in the fee proposal. All of it will be visible in the outcome, though sadly, you will never know what you could have achieved with a well experienced adviser.
The Experience Gap Behind the Fee Proposal
Separate from qualifications, transactional experience is a critical differentiator that fee proposals do not reflect. An adviser who has personally managed multiple completed transactions in your sector has pattern recognition, buyer relationships, and negotiating experience that an adviser on their second or third deal simply does not possess.
They know which buyers are most active right now and what they are paying. They know how buyers behave in due diligence and where they typically apply pressure. They know how to structure an offer comparison that goes beyond headline price. They know when to hold firm in a negotiation and when to be flexible. This knowledge is accumulated through years of transactional experience and it directly affects the quality of the outcome you achieve.
When you receive a fee proposal, the percentage on the page tells you nothing about the depth of experience behind it.
We strongly recommend you check out our article on How to Avoid Unqualified M&A Advisers When Selling Your Business.
For further supplementary reading, it’s also worth checking out our article on Corporate finance adviser or business broker?
The Questions That Reveal What a Fee Proposal Actually Represents
Before you sign any advisory mandate, these questions will tell you whether the fee you are being asked to pay reflects genuine expertise or a professional presentation wrapped around a thin capability.
How many transactions have you personally advised on through to completion in the last three years, and in which sectors? Ask for specifics, not generalities. An experienced adviser will answer with detail. An adviser with limited experience will speak in broad terms.
What professional qualifications do you hold and with which body are you registered? ACA, ACCA, CFA, and the ICAEW Corporate Finance qualification are the relevant benchmarks. These are all verifiable through public registers. If the adviser cannot point you to a verifiable professional qualification, that is a material consideration.
Who specifically will be working on my transaction on a day to day basis, and what are their qualifications and experience? Some firms pitch senior qualified partners and then assign the work to junior or unqualified staff. Understanding who will actually be doing the work is as important as understanding who is presenting the proposal.
Can you provide references from clients whose transactions you have completed in the last 24 months? A confident, experienced adviser will provide these without hesitation. An adviser whose track record is thinner than their presentation suggests will find reasons to deflect.
What is your current active client load, and how many transactions are you personally managing at the moment? An adviser managing thirty active clients simultaneously is not in a position to give your transaction the attention it requires. Understanding their capacity is a legitimate and important question.
The True Cost of Appointing the Wrong Adviser
The advisory fee you pay is not the true cost of your advisory engagement. The true cost is the difference between the outcome you achieve and the outcome you could have achieved with the right adviser.
Consider a business with an adjusted EBITDA of £1.5 million. At a 6x multiple, the enterprise value is £9 million. A well-qualified adviser with strong buyer relationships, running a genuinely competitive process among motivated strategic buyers, might achieve a 7.5x multiple, producing an enterprise value of £11.25 million. The difference is £2.25 million.
The advisory success fee on a £11.25 million transaction at 3% is £337,500. On a £9 million transaction at the same rate it is £270,000. The fee difference is £67,500. The outcome difference is £2.25 million.
The question is never really about the cost of good advice. It is about the cost of anything less.
What Our Fees Include and What You Can Expect
Our corporate finance advisory fees follow the market standard structures described above, with a retainer covering the preparation and process phases and a success fee on completion. What differentiates our engagement is not the fee structure but what sits behind it.
Every transaction is managed by a qualified corporate finance professional with recognised academic credentials and a verifiable track record of completed transactions. We work with a focused client load that allows us to give every transaction the individual attention it deserves. And we measure our success not by the number of transactions we process but by the outcomes we achieve for the business owners who trust us with the most important financial transaction of their lives.
We are transparent about our fees from the first conversation because we believe that transparency is the foundation of a trustworthy advisory relationship. If you would like to understand what our fees would look like for your specific transaction, and what a well-structured sale process could realistically achieve for your business, we would welcome the conversation.
Frequently Asked Questions
Are corporate finance advisory fees tax deductible? Advisory fees incurred in connection with the sale of a business are generally treated as a deduction against the capital gain arising on the transaction, reducing your overall tax liability. The precise treatment depends on the structure of the transaction and your personal tax position. Taking specialist tax advice alongside your corporate finance advice is strongly recommended.
Is a no sale no fee arrangement always in my best interests? Not necessarily. A no sale no fee structure sounds attractive but creates an incentive for the adviser to close any deal rather than the best deal. It is also typically financed through higher success fee percentages or upfront fees described as something other than a retainer. Understanding the full economics of any fee proposal, including what happens if the transaction does not complete, is important before you sign. It is also worth considering that no sale, no fee arrangements can sometimes have extremely restrictive termination clauses. For example, “by withdrawing from the marketing exercise, you restricted our opportunity to sell, therefore £x is due and payable”. Be careful!
What is a Lehman fee structure? The Lehman formula is a tiered success fee structure originally developed by Lehman Brothers for M&A transactions. It applies a higher percentage to the first tranche of transaction value and a lower percentage to subsequent tranches. A typical modern variant might apply 5% to the first £1 million of value, 4% to the next £1 million, 3% to the next, and so on. It is more commonly used in larger transactions where a flat percentage would produce a very large absolute fee.
Should I get multiple fee proposals before appointing an adviser? Yes, and you should evaluate them not just on the fee percentage but on the qualifications and experience of the team, the scope of work included, and the quality of the adviser’s understanding of your business and sector. Two proposals at identical percentages can represent very different value depending on what sits behind them.
How long is a typical advisory mandate? Most advisory mandates run for an initial period of six to twelve months with provisions for extension. It is reasonable to expect an exclusivity period during which you agree not to engage other advisers, though this should be balanced with provisions for what happens if the process stalls or the adviser fails to generate credible buyer interest within a reasonable timeframe.
Can I negotiate the fee? Yes, fees are negotiable, particularly on larger transactions or where there are specific circumstances that affect the scope of work. However, negotiating the fee down should never be the primary objective. The primary objective is appointing the adviser most likely to maximise your outcome, and then ensuring the fee reflects a fair exchange for genuinely expert work.