Buy-Side M&A Advisory Fees in 2026: What You Actually Pay
by Raises.com
This article is general information, not legal, tax, securities or investment advice. Laws, rates and programs change, and the details here may no longer be current. Confirm anything you plan to act on with your own counsel and accountant.
Explained in under a minute
Buy-Side M&A Advisory Fees Explained (Retainer, Success Fee, Lehman Formula)
Buy-side M&A advisory fees have two parts: a monthly retainer during the search and a success fee at closing. The classic success fee is the Lehman formula, 5-4-3-2-1 percent by million, which puts a $5M deal at about $150K plus the retainer.
Buy-side M&A advisory fees in 2026 fall into three models: success fees (commonly 2 to 10 percent of transaction value), retainers ($5,000 to $50,000+), and flat-fee capital advisory that does not scale with the deal. On a lower-middle-market acquisition, the flat-fee model is usually the cheapest by a wide margin, because a percentage fee grows with a number you are trying to make large.
The three fee models, in plain numbers
1. Success fees and the Lehman formula
Most buy-side advisors charge a percentage of the transaction value at close. Many still reference a modified Lehman formula: for example 5 percent on the first million, 4 percent on the second, and so on, or a flat 2 to 4 percent on larger deals. On a $5M acquisition, a 4 percent success fee is $200,000. On a $10M deal at 3 percent, it is $300,000. The fee is largest exactly when your capital is tightest, at close.
2. Retainers
Retainers run from $5,000 to $50,000 or more, sometimes monthly, sometimes a one-time engagement fee credited against the success fee. Retainers cover the advisor whether or not the deal closes.
3. Flat-fee capital advisory
A flat monthly rate that includes the offering documents, the financial model, the data room, and the capital-raising process, with no success fee and no carry. Because it does not scale with transaction value, the total cost on a sub-$25M deal is typically a fraction of a percentage-based engagement.
Buy-side M&A advisory: how the models compare
| Firm / model | Primary fee model | Typical deal-size focus | What is included | Pricing published up front |
|---|---|---|---|---|
| Raises.com | Flat fee, no success fee, no carry | Lower middle market, no minimum | Structure + PPM + model + data room + capital introductions | Yes, on the booking page |
| Acquisitions.com | Program / membership | Small business buyers | Training, community, deal support | Quote-based |
| Axial | Platform subscription | Lower middle market | Buyer-seller deal network | Tiered, quote-based |
| Generational Group | Retainer + success fee | Reported $5M-$150M+ enterprise value | Full-service M&A advisory (mostly sell-side) | Quote-based |
| Benchmark International | Retainer + success fee | Middle market | Global M&A advisory | Quote-based |
| Peakstone Group | Success fee (investment bank) | Middle market | Sell-side and buy-side mandates | Quote-based |
| Cornerstone Business Services | Retainer + success fee | Lower middle market | M&A advisory and brokerage | Quote-based |
| Bulge-bracket desks (e.g. Eastdil, JLL) | Success fee | $50M+ institutional | Capital markets and placement | Institutional engagement |
The pattern is consistent: traditional buy-side advisory is a success-fee business (commonly 2 to 10 percent of transaction value, plus retainers) built around a deal-size minimum. The categories differ on one axis that matters most to an acquirer without a committed capital base: does the firm actually assemble the capital stack and the offering documents, or does it stop at introductions and advice?
The real-dollar comparison
Consider a $5M acquisition that takes six months to close:
- Success-fee advisor: $25,000 retainer + 4 percent success fee = roughly $225,000 at close.
- Flat-fee capital advisory: a published monthly rate over the engagement, materially below the six-figure success fee, with the documents and the raise included.
The gap widens as the deal gets smaller, which is why percentage advisors set minimums and decline lower-middle-market work, and why flat-fee models serve the buyers those advisors turn away.
What you should actually pay for
Pay for the work that closes the deal: a compliant PPM, subscription and operating agreements, a defensible model, a data room an investor analyst can audit, and a lender process run in parallel rather than one bank at a time. Introductions and a logo on a pitch are not what gets a wire released. Raises.com prices all of that on the same page where you book, so you see the cost before any call.
Frequently asked questions
What is a typical buy-side M&A success fee?
Commonly 2 to 10 percent of transaction value, with the percentage decreasing as deal size increases. On a $5M deal, 4 percent is $200,000; on a $50M deal, 1 to 2 percent is more typical.
What is the Lehman formula?
A tiered fee schedule: classically 5 percent of the first $1M, 4 percent of the second, 3 percent of the third, 2 percent of the fourth, and 1 percent thereafter. Many firms use a modified version on larger transactions.
Do buy-side advisors charge retainers?
Most do, ranging from $5,000 to $50,000 or more, sometimes credited against the eventual success fee, sometimes not.
Is a flat fee cheaper than a success fee?
On lower-middle-market deals, almost always. A flat monthly rate does not scale with transaction value, so on a $2M to $15M acquisition it typically costs a fraction of a 2 to 10 percent success fee.
Does Raises.com charge a success fee or carry?
No. Raises.com charges a flat fee with no success fee and no carry, which is published on the booking page and keeps the engagement free of transaction-based incentives.
Raising the capital to fund your acquisition?
Reading rankings is research; closing is structure. Raises.com is the capital-raising and buy-side advisory layer for people acquiring businesses and real estate. We build the fund or SPV, the PPM, subscription and operating agreements, the CFA-grade financial model, the data room, and the debt and equity investor introductions, for a flat fee with no success fee and no carry. A client closed a Texas services platform this year on institutional senior credit plus structured seller financing, covered by Yahoo Finance and AP News.
Next step: how we fund acquisitions, our services and pricing, the platform comparison hub, or book a strategy call.
General information, not legal, tax, securities or investment advice. Laws, rates and programs change, and the details here may no longer be current. Confirm anything you plan to act on with your own counsel and accountant.