The Short Answer: Expect to Pay 3-10% of Transaction Value

Selling a business typically costs between 3% and 10% of the final transaction value in advisory fees, depending on the size of your deal, the complexity of the transaction, and whether you hire a business broker or an M&A advisor. For a business selling in the $3M to $50M range, professional advisory fees usually run between $150,000 and $500,000 — and the right advisor will more than pay for themselves by driving a higher sale price.

Here is what you need to know about the real costs of selling a business, how different fee structures work, and why the cheapest option almost always costs you the most.

How M&A Advisory Fees Are Structured

Most M&A advisory firms — including Icon Business Advisors — use a combination of two fee components: a retainer and a success fee.

The retainer is a monthly or upfront fee that covers the advisory firm’s time building your Confidential Information Memorandum (CIM), conducting buyer research, marketing the business, and managing the process. Retainers typically range from $2,500 to $10,000 per month, or $15,000 to $50,000 as an upfront engagement fee. This retainer is almost always credited against the success fee at closing.

The success fee is the larger component — a percentage of the total transaction value paid at closing. For deals in the $3M to $50M range, success fees generally range from 3% to 6%, often on a tiered or declining scale where the percentage decreases as the deal value increases.

This structure aligns your advisor’s incentive directly with yours: the more they sell your business for, the more they earn. That alignment matters.

The Lehman Formula: What It Is and Why It’s Outdated

You may have heard of the Lehman Formula — a fee structure originally developed by investment bank Lehman Brothers for large corporate transactions. The original formula works like this: 5% of the first $1M, 4% of the second $1M, 3% of the third $1M, 2% of the fourth $1M, and 1% of everything above $4M.

For deals above $50M, this formula can work. But for lower middle-market transactions in the $3M to $25M range, the Lehman Formula often produces fees that are too low to justify the level of work required. Running a full M&A process for a $10M company takes nearly the same effort as running one for a $50M company — the same CIM, the same buyer outreach, the same negotiation complexity.

Many modern M&A advisory firms use a modified or "Double Lehman" structure, or simply negotiate a flat success fee percentage that reflects the actual work involved.

Business Broker Commissions vs. M&A Advisory Fees

Business brokers and M&A advisors operate on fundamentally different models, and understanding the distinction matters when evaluating cost.

Business brokers typically charge a straight commission of 8% to 12% of the sale price, similar to a real estate agent. They list your business, respond to inquiries, and facilitate the transaction. For businesses under $2M in revenue, this model can work fine.

M&A advisors charge lower percentages (3-6%) but provide a fundamentally different service: they actively create competition among buyers, manage a structured auction process, negotiate deal terms beyond just price (working capital, earnouts, reps and warranties, non-competes), and quarterback the entire transaction through due diligence and closing.

A $12M manufacturing company in Middle Tennessee we advised was originally considering listing with a broker at 10% commission. We ran a competitive process that generated seven qualified offers and closed the deal at $14.8M — $3M above the owner’s initial expectations. Even after our advisory fee, the owner walked away with significantly more than he would have netted through a broker.

The math almost always favors professional M&A advisory for businesses above $3M in revenue.

What You Actually Get for the Fee

When you engage an M&A advisor for a sell-side transaction, your fee covers a comprehensive set of deliverables and services that most business owners cannot replicate on their own:

Pre-Market Preparation includes a detailed business valuation, quality of earnings analysis coordination, a 40-60 page Confidential Information Memorandum, financial restatement and normalization, and identification of value drivers and risk factors.

Buyer Identification and Outreach involves building a target list of 100-300 potential buyers (strategic, private equity, and independent), confidential outreach and screening, managing NDAs and information flow, and coordinating management presentations.

Deal Negotiation and Execution covers managing a competitive bid process, LOI negotiation and comparison, due diligence management and data room coordination, purchase agreement review support, and working capital and closing adjustment negotiation.

At Icon, we maintain relationships with over 400 boutique investment banks and PE firms — a network that takes years to build and would be impossible for an individual seller to replicate.

Why “Cheap” Almost Always Costs You More

The most expensive mistake business owners make is trying to save money on advisory fees by going it alone or hiring the cheapest option available.

The data tells the story. According to multiple industry studies, businesses sold with professional M&A advisory close at purchase prices 20-40% higher than businesses sold without representation. For a $10M business, that is $2M to $4M in additional value — far exceeding any advisory fee.

A healthcare services company we worked with had initially attempted a direct sale to a single buyer who had approached them unsolicited. The offer was $8M. The owner thought it was fair. We ran a competitive process with 40+ targeted outreach contacts, generated five offers, and closed at $11.2M — a $3.2M improvement over what the owner was about to accept.

The reasons advisors consistently deliver higher values are straightforward. Competition creates urgency. Professional marketing materials present your business in its best light. Experienced negotiators protect your interests on dozens of deal points beyond just headline price. And confidentiality management prevents employees, customers, and competitors from learning about the sale prematurely.

How Icon Structures Fees for Alignment

At Icon Business Advisors, we structure every engagement so our incentives are completely aligned with yours. Here is how that works in practice.

We charge a reasonable upfront engagement fee that covers the real cost of preparing your business for market — the valuation work, CIM creation, and initial buyer research. This fee is credited against the success fee at closing, so it is not an additional cost — it is an advance.

Our success fee is structured so that we earn more when you sell for more. We do not charge the same percentage whether your business sells for $5M or $15M. Our tiered structure means we are financially motivated to push for every dollar of value.

We do not take listings. If we do not believe we can sell your business for a price that makes the process worthwhile for you, we will tell you directly — and help you understand what needs to change before going to market.

Hidden Costs to Plan For

Advisory fees are the largest cost of selling your business, but they are not the only expense. Smart sellers budget for several additional items.

Legal counsel will typically run $30,000 to $75,000 for a transaction in the $5M to $25M range. This covers purchase agreement review, disclosure schedules, and closing mechanics. Do not use your family attorney for this — hire an M&A attorney who has closed dozens of deals.

Accounting and tax advisory costs of $10,000 to $40,000 cover quality of earnings analysis, tax structure optimization, and transaction accounting. The tax planning alone can save you hundreds of thousands of dollars.

A quality of earnings report, often requested by buyers, costs $15,000 to $40,000 depending on complexity. Having this done proactively, rather than reactively, puts you in a stronger negotiating position.

Environmental, insurance, and other specialized diligence costs vary by industry but should be budgeted at $5,000 to $20,000.

All in, plan for total transaction costs of 6-12% of the deal value. This is an investment, not an expense — and for most owners, selling their business is the largest financial transaction of their lives.

Is It Worth It? The ROI of Professional Advisory

Every business owner has to answer this question for themselves. But here is how we think about it.

If you built a business worth $10M, you spent 10, 15, maybe 20 years of your life creating that value. The difference between a $10M exit and a $13M exit is $3M — enough to change the trajectory of your family’s financial future. That difference is almost always the delta between going it alone and hiring the right advisor.

The question is not "can I afford M&A advisory fees?" The question is "can I afford not to have the right team in my corner for the biggest financial decision I will ever make?"

If you are a business owner with $3M to $50M in revenue and you are thinking about selling in the next one to five years, we would welcome a confidential conversation about your situation. No pitch, no pressure — just an honest assessment of where you stand and what the process looks like.

Schedule a Confidential Discovery Call

Icon Business Advisors is a Nashville-based M&A advisory firm serving business owners with $3M to $50M in revenue. We help you sell your business, raise capital, or plan your exit — with the sophistication of an investment bank and the credibility of someone who has been in your chair. Learn more about our sell-side advisory services.