What is a typical M&A advisor success fee structure?
M&A advisor success fees are typically structured as a percentage of the transaction value, paid only when a deal closes.
Success Fee Basics
Success fees are calculated on enterprise value, which includes both equity value and assumed debt. Most advisors set minimum fees ranging from $25,000 to $100,000 to ensure compensation on smaller transactions. Among Advisor Standard profiles with disclosed fee information in Ontario, 55% list minimum fees of $50,000 or higher.
Success fees are subject to GST/HST as they constitute a taxable professional service under the Canada Revenue Agency Excise Tax Act section 165.
The Lehman Formula and Common Variants
The traditional Lehman Formula uses declining percentages: 5% on the first $1 million, 4% on the second million, 3% on the third million, 2% on the fourth million, and 1% on amounts above $4 million.
The Double Lehman Formula doubles these percentages to 10% on the first million, 8% on the second million, 6% on the third million, 4% on the fourth million, and 2% on amounts above $4 million. This variant is commonly used for smaller transactions where the advisor's fixed costs represent a larger proportion of the deal economics.
How Deal Size Affects Fee Structure
For deals above $10 million, advisors commonly negotiate flat percentage fees rather than tiered structures, with rates typically between 1% and 3%. The shift reflects economies of scale — while larger deals require more sophisticated structuring, they don't proportionally increase the advisor's workload compared to the fee generated under a tiered model.
Among Advisor Standard profiles with disclosed fee information in the manufacturing vertical, the median success fee percentage is 8.5% for deals under $5 million.
Additional Fee Components
Among Advisor Standard profiles with disclosed fee information, 42% charge a separate monthly retainer in addition to success fees. Retainer fees for middle-market deals typically range from $5,000 to $25,000 per month and may be credited against the success fee at closing.
Some advisors include tail provisions in engagement letters that entitle them to fees if a transaction closes within 6 to 12 months after the engagement ends with a buyer they introduced — with some advisors, particularly for larger transactions or where significant buyer development work was involved, extending this to 18 to 24 months. This protects the advisor's compensation if a seller terminates the engagement to avoid paying a success fee on a deal already in progress.
Success fee agreements typically define transaction value to exclude seller financing, earnouts, and contingent payments unless they convert to cash within a specified period. This prevents disputes over how to value deferred or contingent consideration.
Regional and Vertical Variations
Fee structures vary by vertical and deal complexity. According to a credible M&A advisor interview from a Toronto-based tech-focused practice, in technology and SaaS verticals, advisors may structure fees based on ARR multiples rather than traditional transaction value, though this remains less common in the broader market.
This article is for informational purposes only and does not constitute financial, legal, or business advice. Every business sale is different. Before making decisions about valuation, pricing, or engaging an advisor, consult a qualified professional familiar with your specific situation.
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