Selling a business is one of the largest financial transactions most owners will ever go through, and broker commissions can easily run into six figures.
Yet most sellers walk into their first broker meeting with no idea what a fair rate looks like, what fee structures even exist, or which line items in a listing agreement are negotiable. This guide breaks all of that down so you go in prepared.
Key Takeaways
- Most business brokers charge between 8% and 12% commission on deals under $1 million, with rates dropping as the sale price rises.
- Retainer fees, minimum commissions, and monthly marketing charges can add tens of thousands of dollars beyond the headline percentage.
- The Lehman Formula and its modern variant (the Double Lehman) are the dominant tiered commission structures used for deals above $1 million.
What Is a Business Broker Commission?
A business broker commission, sometimes called a “success fee,” is a percentage of the final sale price paid to the broker at closing. The broker earns nothing until the deal closes, which is why this model is described as performance-based.
The commission compensates the broker for valuing the business, marketing it to qualified buyers, managing due diligence, and getting the transaction across the finish line.
The U.S. business brokerage industry was valued at $1.8 billion in 2024, with the majority of revenue coming from these commissions (IBISWorld, 2024). Given those numbers, it is a significant industry, and the fees reflect it.
The Standard Commission Ranges by Deal Size
There is no universal rate. What you pay depends heavily on how much your business sells for. Here is how the market generally breaks down:
| Sale Price Range | Typical Commission Rate | Common Structure |
|---|---|---|
| Under $1 million | 8% to 12% | Flat percentage |
| $1 million to $5 million | 5% to 10% (tiered) | Double Lehman Formula |
| $5 million to $25 million | 3% to 6% | Double Lehman or flat rate |
| $25 million and above | 1% to 4% | Flat percentage or Reverse Lehman |
For businesses under $1 million, a 10% commission is the most common rate by a wide margin. On a $500,000 sale, that is $50,000 going to the broker. On a $900,000 deal, you are looking at $90,000. Those numbers surprise a lot of first-time sellers.
How the Lehman Formula Works
Once a business gets into the seven-figure range, most brokers and M&A advisors use a tiered structure originally developed by Lehman Brothers. The original formula applied a declining percentage to each million-dollar tranche of the sale price.
The version used today is typically the Double Lehman (also called the Modified Lehman), which doubles each tier.
Here is how the Double Lehman breaks down on a $5 million sale:
- 10% on the first $1 million = $100,000
- 8% on the second $1 million = $80,000
- 6% on the third $1 million = $60,000
- 4% on the fourth $1 million = $40,000
- 2% on the fifth $1 million = $20,000
- Total commission: $300,000
Some brokers skip the formula altogether for deals above $5 million and propose a flat percentage instead. A 4% flat rate on a $10 million sale produces the same $400,000 result as running the Double Lehman math, so the two approaches often converge at higher deal sizes (MidStreet, 2022).
Beyond the Commission: Other Fees to Watch For
The commission percentage is the headline number, but it is rarely the only cost. Sellers routinely encounter additional charges that can add $5,000 to $50,000 or more to the total.
Retainer Fees
Many brokers, especially at the lower middle market level and above, charge an upfront retainer before work begins. This is non-refundable and typically ranges from $5,000 to $25,000. Some firms credit the retainer against the final commission; others keep it in addition to it. Ask which applies before signing anything.
Minimum Commission Clauses
Most brokers set a floor on what they will earn regardless of the sale price. For Main Street deals, that minimum is usually $10,000 to $15,000. At the lower middle market level, minimum commissions of $35,000 to $50,000 are common (MidStreet, 2022).
If your business sells at the low end of its expected range, the minimum can result in an effective commission rate well above what was quoted as a percentage.
Monthly Marketing Fees
Some brokers charge monthly fees to cover listing costs, marketing materials, and buyer outreach. These typically run $500 to $2,500 per month. Across a 6 to 12-month sale timeline, that adds $3,000 to $30,000 on top of everything else. Not every broker uses this model, but it is worth asking upfront.
What Affects the Rate You’ll Be Quoted
Rates are not random. Several factors push them higher or lower:
- Business size: Larger businesses generate bigger dollar commissions at lower percentages. A broker earning 5% of a $3 million sale takes home $150,000. There is less pressure to charge 10%.
- Transaction complexity: Businesses with messy financials, multiple entities, or real estate attached to the deal require more work and often command higher rates.
- Broker experience: More experienced brokers tend to charge more and are also more likely to require retainers. The rate often reflects their track record in closing deals at or above asking price.
- Market conditions: In high-demand seller markets, brokers may reduce their rates slightly to win listings. In slower periods, they are less likely to budge.
- Industry: Certain industries with fewer qualified buyers require more active marketing, which can influence how a broker prices their time.
Exclusivity Agreements and Tail Clauses
Almost every broker will require an exclusive listing agreement before they start marketing your business. This locks you into working with that broker for a set period, typically 6 to 12 months, and sometimes up to 18.
During that window, you generally cannot sell through another broker or independently without still owing the commission.
Pay attention to the tail clause. Most agreements include a period after expiration, usually 6 to 12 months, during which the broker can still claim their commission if a buyer they introduced ends up purchasing the business.
This is easy to overlook and can create significant liability if you switch brokers or try to close a deal independently after the agreement ends.
Can You Negotiate the Commission?
Yes, and you should try. The commission rates brokers quote are a starting point, not a fixed number. A few things give you negotiating leverage:
- A larger sale price with a straightforward deal structure
- Detailed, clean financials that reduce the broker’s preparation work
- Competing broker proposals (get more than one quote)
- Agreeing to a longer exclusivity period in exchange for a lower rate
What you are unlikely to negotiate away entirely is the minimum commission clause or the retainer, especially with established firms. Focus your negotiation energy on the percentage and what happens if the deal falls through.
How These Fees Compare to Selling Without a Broker
Some sellers explore going to market without a broker to avoid the commission entirely. This is possible, particularly for smaller businesses, and platforms like BizBuySell allow sellers to list directly. The tradeoff is time, deal exposure, and negotiation expertise.
Brokers maintain buyer databases that private sellers simply do not have access to, and an experienced broker can often justify their fee by achieving a higher sale price than a seller would reach on their own.
That said, for businesses under $200,000 in value, a 10% commission combined with a $10,000 minimum can be difficult to justify. Flat-fee listing services are worth considering at that end of the market.
Conclusion
Understanding how broker commissions work before you sign a listing agreement is the difference between a deal that feels fair and one that leaves you wondering where the money went.
Get multiple quotes, read the full fee schedule, and ask specifically about minimums, retainers, tail clauses, and what happens to fees if the deal does not close.
Sources: IBISWorld Business Brokerage Industry Report (2024); MidStreet, “Business Broker Fees When Selling a Business” (2022); Morgan & Westfield, “Business Broker and M&A Advisor Fees: A Comprehensive Guide” (2026); Rejigg, “How Much Do Business Brokers Charge?” (2026); BizBuySell, “Understanding Business Broker Fees” (2022).
