An M&A advisor retainer is paid before closing, while a success fee is paid when the transaction completes. For owners selling a business, the difference matters because retainers shift process cost to the seller before buyer value is proven. Lyndon Advisory charges a success fee only: 2% of enterprise value, capped at US$300,000, with no retainer, monthly fee, upfront fee, or expense recharge.
Retainers are not always wrong, but sellers should understand the economics before signing.
Retainer vs Success Fee
| Feature | Retainer | Success fee |
|---|---|---|
| Timing | Paid before or during process | Paid at closing |
| Seller risk | Pay even if no deal closes | Pay only if value is realized |
| Advisor alignment | Can reduce closing pressure | More tied to completion |
| Key protection | Cap and credit against success fee | Clear trigger and fee cap |
| Main danger | Open-ended monthly cost | Uncapped percentage or broad tail |
Axial’s 2025-2026 M&A Fee Guide shows that retainers, engagement fees, minimum fees, expense policies, and success fees can vary widely. Sellers should ask how every dollar is treated if no transaction closes.
When a Retainer Is More Defensible
| Retainer feature | Better version |
|---|---|
| Purpose | Funds named preparation work |
| Duration | Fixed period, not open-ended |
| Credit | Fully credited against success fee |
| Expenses | No recharge or written cap |
| Deliverables | Teaser, CIM, financial model, buyer map, data-room plan |
| Termination | Clear rights and narrow tail |
If a retainer funds only availability or generic listing work, the seller should be cautious. If it funds real preparation and is credited against the success fee, the economics may be more reasonable.
Corporate Finance Institute’s CIM overview describes the CIM as a core sell-side marketing document. If an advisor asks for pre-closing fees, sellers should confirm those fees are tied to concrete materials and process work.
“The cleanest seller alignment is success-fee-only at closing. If a retainer exists, it should be capped, credited, and tied to real work that improves buyer readiness.”
— Daniel Bae, Founder & CEO, Lyndon Advisory
Lyndon Approach
| Item | Lyndon structure |
|---|---|
| Retainer | None |
| Monthly fee | None |
| Upfront fee | None |
| Expense recharge | None |
| Success fee | 2% of enterprise value |
| Fee cap | US$300,000 |
| Payment trigger | Closing only |
For related pages, read No-Upfront-Fee M&A Advisor, Success-Fee-Only M&A Advisor, and Transparent M&A Advisor Fees.
Practical Next Step
| Situation | Best next step |
|---|---|
| You have a retainer proposal | Compare M&A advisor fee proposals |
| You want to model retainer drag | Use the fee calculator |
| You want a closing-only model | Review Lyndon fees |
About the Author
Daniel Bae
Co-founder & CEO, Lyndon Advisory
Daniel is an investment banker with 15+ years of experience in M&A, having advised on deals worth over US$30 billion. His career spans Citi, Moelis, Nomura, and ANZ across London, Hong Kong, and Sydney. He holds a combined Commerce/Law degree from the University of New South Wales. Daniel founded Lyndon Advisory to solve the pain points in M&A, enabling bankers to focus on what matters most — delivering trusted advice to clients.
About Lyndon Advisory
Lyndon Advisory is an M&A advisory firm built for Asia Pacific. We help business owners sell their companies and investors make strategic acquisitions with senior-led execution, disciplined process management, and structured buyer research. For owners, the first step is a confidential review of valuation range, likely buyer universe, and whether a structured sell-side process is justified.
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