M&A brokers (business brokers) and investment bankers both act as a seller's agent in a sell-side process, but they serve different ends of the market and work quite differently. The practical question for an owner is not which title is better but which is matched to the size and complexity of their business.
The core difference: deal size
The cleanest dividing line is enterprise value:
| Business broker | Investment bank | |
|---|---|---|
| Typical deal size | Under ~$5–10M EV | ~$10M EV and up |
| Buyer type | Individuals, searchers, small strategics | PE, platforms, strategics |
| Process | Often listing-style, one buyer at a time | Competitive IOI/LOI auction |
| Materials | Short CBR / profile | Full CIM + teaser |
| Reach | Local/regional, listing sites | National/global, curated buyer lists |
The middle — roughly $5–50M EV, the lower-middle market — is served by boutique "M&A advisers" who run banker-style processes for smaller companies and blur the distinction.
How they differ in practice
- Process design. A banker's value is the competitive process — running many buyers in parallel to manufacture tension and lift price. A traditional broker more often markets a business semi-publicly and negotiates with buyers as they appear.
- Buyer reach. Bankers maintain proprietary relationships with PE funds and corporate acquirers; brokers rely more on listing marketplaces (BizBuySell and similar) and local networks.
- Materials and analysis. Bankers produce a full CIM, detailed add-back analysis and often a sell-side QoE; broker materials are typically lighter.
- Negotiation and structuring. Bankers add the most value on complex structure — earnouts, rollover, escrow, financing — where a few negotiated points dwarf the fee.
Fees
- Brokers often charge a higher flat percentage (commonly ~8–12% on small deals) and a smaller retainer.
- Bankers charge a monthly retainer plus a success fee that scales with size — historically a "Lehman" or "double-Lehman" formula, often with an incentive tier that pays a higher rate on value above a threshold, aligning the banker with pushing price up.
Licensing
Both must respect securities law. A sale structured as a stock transaction can implicate broker-dealer registration; the U.S. has a limited "M&A broker" exemption for privately negotiated sales of smaller businesses, but advisers and owners should confirm the adviser's standing. (See M&A adviser / business broker.)
Choosing
For a sub-$5M owner-operated business, a competent broker with the right buyer network is usually the right, cost-effective choice. Above ~$10M — and especially where there is institutional buyer interest, complex structure or regulatory exposure — the price and terms a banker's process produces typically more than cover the higher fee.
See also
- Investment banking in M&A — The advisory role banks play in originating, valuing and executing deals.
- Sell-side M&A process — The deal cycle from the seller's perspective: preparation, marketing materials, buyer outreach, IOIs, LOIs, exclusivity, due diligence, definitive agreement and closing.
- M&A advisor / business broker — Sell-side advisor focused on the lower-middle market and main-street segment, typically for deal sizes from sub-$1M up to ~$25M. Distinct from investment bankers in scale, fee structure and process style.
- Deal sourcing — The activity of identifying and engaging acquisition targets — through bankers, broker networks, proprietary outreach, conferences, screened lists and inbound referrals.
- Search fund — An entrepreneurial vehicle in which one or two operators raise modest investor capital to search for, acquire and operate a single small or lower-mid-market company.
External resources
Practitioner guides from Main Street Wealth, the M&A advisory firm that sponsors M&Apedia (how this works):
- Sell a business — Sell-side advisory process, timelines and seller resources.
- Buy a business — Buy-side process for strategic and financial buyers.