The Advisory Fee Conversation: What Boutique Firms Should Know About Pricing in 2025

Fee conversations are uncomfortable for a reason: they surface the tension between advisory value and advisory economics that most boutique firms would rather leave implicit. The partner pitching a mandate wants to win the business; the fee structure negotiation is the moment that tests whether the client genuinely values the service or is shopping for the cheapest process. Getting this conversation right — or wrong — shapes not just the economics of the mandate, but whether the engagement dynamic is healthy from day one.

The 2025 market context for advisory fees is modestly favourable for advisors. Deal activity is rebounding, mandates are more competitive, and advisors with genuine sector expertise and proven execution records are in a position to hold pricing. Industry data from sources including Axial and M&A Community surveys shows that fees are generally rising in the current environment, and that success-only fee structures — which were more common when advisors were competing aggressively for mandates in a thin market — are being replaced by retainer-plus-success combinations.

The anatomy of a typical boutique fee structure

Most boutique M&A advisory mandates are structured around two components. A retainer — paid monthly throughout the engagement — covers the firm's ongoing work and filters for client commitment. A success fee — typically calculated as a percentage of enterprise value, often using a modified Lehman or double-Lehman formula — is the primary economics driver and aligns the firm's incentive with transaction completion.

The percentage applied to the success fee varies significantly by deal size. On transactions below £5 million, fees can reach 5 to 7 percent of deal value. On transactions in the £20–50 million range, success fees typically fall between 2 and 4 percent. For transactions above £100 million, the percentage compresses toward 1 to 2 percent, with minimums providing a floor. Industry benchmarks should inform but not dictate individual fee negotiations — quality, complexity, and the advisor's track record all affect what the market will bear.

The retainer conversation

The retainer is not just an economics mechanism — it's a commitment test. Advisors who waive retainers to win mandates frequently find themselves working with clients who are not fully committed to a transaction: testing the market without genuine intention to transact, or unwilling to invest in a process that requires their active engagement. A modest but real retainer is a signal that both parties are serious.

The best clients pay the retainer without negotiating it. The ones who fight hardest on the retainer are usually the ones who will be hardest to work with throughout the process.

Protecting the fee arrangement

Fee protection — the tail provision that entitles the advisor to a success fee if a transaction is completed within a defined period after mandate termination — is standard practice but frequently under-documented. Clear, specific language around which counterparties are covered, what the tail period is, and under what circumstances the fee is triggered is essential. Disputes over fees are disproportionately concentrated in situations where mandate termination language was vague or the tail provision was poorly defined.

Announcement fees and process protection

A growing practice in the current market is the inclusion of announcement or signing fees — a smaller fee triggered at transaction signing rather than waiting for completion. This provides partial economics in transactions that sign but take extended periods to close, or in transactions that fail to complete after signing for reasons outside the advisory firm's control. As deal complexity increases and completion timelines extend, this protection is worth including as a standard term rather than an exception.

Source: Understanding Investment Banking Fee Structures — Axial.