Business Broker: What They Do and What Buyers Should Know

By Charlie Brennan • Published June 22, 2026 • Updated June 27, 2026 • Educational content only — not financial, legal, or tax advice.

A business broker is an intermediary who facilitates the sale of small businesses — typically those under $5 million in enterprise value. Brokers market the business for sale, qualify potential buyers, manage the information flow during due diligence, and help coordinate the closing process. They are almost always hired by and represent the seller, not the buyer.

How Brokers Are Paid

Business brokers work on commission — typically 8% to 12% of the final sale price, paid at closing by the seller. Some use the "Lehman formula" or variations, where the percentage decreases as deal size increases. For deals under $1 million, 10% is common; for deals in the $1M–$5M range, 8–10% is typical.

Because brokers are paid on sale price, they have a natural incentive to maximize that price — which aligns with the seller's interest and runs counter to the buyer's interest. This is not a criticism of brokers; it's just the structure. Knowing it protects you as a buyer.

What Brokers Do for Sellers

What Buyers Should Understand About Brokers

The CIM is a marketing document. The Confidential Information Memorandum is prepared to present the business favorably. The add-backs will be maximized. The narrative will emphasize opportunity. Treat it as a starting point, not verified fact — everything significant requires independent verification in due diligence.

The broker is not your advisor. If a broker gives you advice, it may be genuinely helpful, or it may be designed to keep the deal together and the commission intact. Buyers handling deals above $500K should consider working with their own M&A advisor or attorney who is explicitly representing buyer interests.

Brokers do know the market. Despite the conflict, brokers who work in a specific market or industry can provide genuinely valuable market color — what similar businesses have sold for, what terms are normal, which issues are deal-killers in their experience. This institutional knowledge has real value.

M&A Advisors vs. Business Brokers

The term "M&A advisor" is used for intermediaries handling larger deals — typically $5 million and above. The sell-side M&A advisor performs the same fundamental role as a business broker but may work on a retainer-plus-success-fee structure and may have more sophisticated financial modeling capability. The IBBA (International Business Brokers Association) is the primary professional organization for business brokers; investment banks and boutique M&A firms handle larger transactions.

Finding a Broker-Listed Business

Most broker-listed businesses are found on BizBuySell, BizQuest, DealStream, or through direct broker networks (like those affiliated with IBBA). Off-market deals — businesses not listed with brokers — are sourced through direct outreach to business owners, referrals, or through search fund networks.

Deal-Model Context

A business broker can be useful for sourcing listed deals, coordinating seller communication, and organizing documents, but the buyer should remember who the broker represents. In most small-business transactions, the broker is paid by the seller and is motivated to close at the highest supportable price.

In the model, broker-provided numbers should be treated as a starting point. Rebuild SDE, verify add-backs, test the asking multiple, and independently assess whether seller financing, transition support, and working capital are realistic.

Buyer Diligence Questions

Good brokers can explain the seller's motivation, help gather tax returns and P&Ls, and keep the process moving. Weak brokers may resist diligence, overstate normalized earnings, or frame every objection as a negotiating tactic rather than a real risk.

This term connects to LOIs, due diligence, seller financing, and reps and warranties. Ask whether the broker has verified the financials, what documents are available before an LOI, and whether the broker will support a financing-contingent offer.

Practical Review Checklist

Before relying on Business Broker: What They Do and What Buyers Should Know in an acquisition model, turn the term into a written assumption. State what source document proves it, what dollar amount or risk category it changes, and whether it affects purchase price, cash at closing, debt service, working capital, legal exposure, or post-close operations. That step makes the concept auditable instead of merely descriptive.

For buyer diligence, collect at least one primary source document, one seller explanation, and one downside case. If the source document is missing, keep the assumption out of the base case. If the downside case changes DSCR, working capital, customer retention, or transition risk enough to threaten closing, address it through price, seller financing, escrow, earnout, indemnity, or a closing condition.

When using AcquireCalc, enter the verified number first, then test the seller's number and a conservative number. The spread between those cases shows whether Business Broker: What They Do and What Buyers Should Know is a minor definition, a negotiation point, or a risk that should change the structure of the deal.

Related Terms

Sources & Further Reading

C
Charlie Brennan

Studied M&A deal structures by analyzing 50+ business acquisition opportunities, with a focus on valuation, financing terms, seller motivations, and operational risk. Built practical acquisition tools for business buyers.