The Complete Guide to Buying an Insurance Book of Business
What to evaluate, what to pay, and what to watch out for when buying someone else's book.
Buying a book of business is the fastest way to skip the years of cold calling and relationship building that come with starting from scratch. It's also the fastest way to waste six figures if you don't know what you're looking at.
I've seen agents buy books that evaporated within two years and agents who bought books that became the foundation of a seven-figure agency. The difference wasn't luck — it was due diligence.
The SBA reports that roughly 20% of small businesses fail in the first year and about 50% by year five — but acquisition-based entries have significantly higher survival rates due to existing cash flow and client relationships.
Retention Is Everything
Before you look at revenue, commission splits, or carrier mix, ask one question: what's the retention rate? Ask for three years of carrier-reported data, not the seller's internal tracking. MarshBerry identifies carrier-reported retention as the authoritative data source for valuation, as internal estimates tend to be less conservative.
Per MarshBerry, best-in-class agency retention runs above 93-94 percent — books in this range renew predictably with minimal effort. A book at 85 percent retention means replacing 15 percent of the book annually just to stay even. At that churn rate, you haven't bought a book. You've bought a pipeline that needs constant feeding.
Carrier Mix and Appetite
Verify which carriers the book is placed with and whether those carriers are still actively writing in your market. Carrier appetites change. A book that was great three years ago might be sitting on a carrier that's pulling back from your state or restricting new business in your ZIP code.
Also check commission rates. Some books come with legacy commission agreements that won't transfer to a new owner. You might be looking at $300,000 in revenue under the seller's contract and $240,000 under yours because the carrier resets the commission schedule for new agents.
Carrier transfer complications are one of the most common deal-killers. Sica Fletcher, the #1 S&P-ranked insurance M&A advisor, emphasizes that getting written confirmation of appointment transferability should happen before any letter of intent is signed.
"We could likely be approaching a 'normal' level of deal-making, similar to what we saw around 2017-2019." — Steve Germundson, Partner, OPTIS Partners (Insurance Business Magazine)
Customer Concentration
Pull a list of the top 20 clients by premium. Per MarshBerry, single-client exposure above 5-10 percent consistently suppresses multiples. If the top 10 clients represent a disproportionate share of revenue, that concentration is a valuation risk. One defection in a concentrated book can blow up your acquisition economics.
The best books are diversified across hundreds of policies with no client dominant enough to matter individually. That's what predictable cash flow looks like.
Producer Dependency
Who has the relationships? If the seller is a solo agent who personally handles every client, you're buying their Rolodex — and Rolodexes don't transfer well. Insurance Business Magazine reports that books dependent on a single producer commonly experience elevated attrition during ownership transitions — clients with deep personal ties to their former agent are more likely to shop.
If the book has been serviced by a team, the transition is smoother. Clients are attached to the phone number and the service experience, not one individual's cell phone. Ask who handles renewals, who handles claims, and whether those people are staying post-acquisition.
Financing the Deal
Most agency acquisitions under $1 million are financed through a combination of seller financing and SBA 7(a) loans. Lenders that specialize in insurance agency acquisitions — such as Live Oak Bank — understand the industry's economics in ways general commercial lenders may not. Deal structures vary, but commonly involve a combination of buyer down payment, seller financing, and SBA lending. Per SBA.gov, SBA 7(a) loans support business acquisitions with government-backed guarantees.
Earnout provisions are common — the seller's final payout depends on retention hitting certain targets post-close. This is actually good for you as a buyer. It aligns incentives and protects against the book shrinking after the seller walks away. See our deep dive on earnout structures in agency sales for how to structure them so they actually protect you, and our financing an agency acquisition guide for how these pieces fit together.
The Due Diligence Minimum
At minimum, verify retention rates from carrier reports, loss ratios by line, carrier appetite and commission schedules, customer concentration, E&O claims history, lease terms and obligations, staff contracts and non-competes, and technology systems. If the seller pushes back on any of these, walk away. Transparency in due diligence isn't optional — it's a signal of what kind of business you're buying.
Pricing the Book
Per Peak Business Valuation and Sica Fletcher, personal lines books generally trade at lower multiples than commercial lines books — reflecting the difference in client retention, revenue per account, and relationship depth. Mixed books fall somewhere in between, with the commercial percentage pushing the multiple up.
This premium is well-documented: Peak Business Valuation reports insurance brokerage EBITDA multiples of 4.28x-5.24x, with commercial-focused books consistently at the higher end of the range.
Don't pay revenue multiples on a book with declining retention, aging carriers, or concentrated clients. Those discounts exist for a reason, and no amount of "I'll work harder" overcomes structural problems in the book you're buying. For benchmarking against current transaction data, see our roundup of insurance agency revenue multiples in 2026 and how to value a P&C insurance agency.
The right book at the right price, with the right financing, can significantly accelerate your growth timeline. The wrong one can set you back. The difference is in the due diligence.
This post is informational only. Consult a CPA, an M&A attorney, and a professional valuator before making any acquisition decisions.
Frequently Asked Questions
Q: Has anyone bought an insurance book of business? What did you wish you'd known?
A: The most common regret is accepting seller-reported retention instead of demanding carrier-reported data. The second is assuming commission rates automatically transfer — many carriers reset new agents to a lower schedule. Verify both in writing before signing an LOI.
Q: How do I correctly valuate a book of business for purchase?
A: Personal lines books typically price at 1.5x-2x annual commission; commercial lines at 2x-3x. Where a book lands in that range depends on retention, carrier mix, customer concentration, and producer dependency. A book with 95% retention and a diversified commercial mix prices at the top of the range.
Q: Do carrier contracts move with the book?
A: Not automatically. Every carrier has its own appointment transfer rules, and some require full reappointment of the new owner before renewals will pay commissions. Per Sica Fletcher's guidance, get written confirmation of appointment transferability from every carrier before the LOI is signed — carrier issues are one of the most common deal-killers.
Q: How do I verify the seller's retention numbers?
A: Ask each carrier directly for the agency's renewal retention over the last three years. Carrier reports show actual policy renewals versus non-renewals; the seller's internal tracking often conflates rewrites as "retained." If the seller resists, treat it as a walkaway signal.
Q: How do most people finance a book of business purchase?
A: The typical stack is a 20-30% buyer down payment, SBA 7(a) lending (often through insurance specialists like Live Oak Bank), and a seller carryback note for 10-40% of the price. See the financing an insurance agency acquisition guide for structures that pencil.
Sources & References
- SBA — How Long Do Small Businesses Last? — Business survival statistics
- Peak Business Valuation — Insurance Brokerage Multiples — EBITDA and revenue multiple benchmarks
- Sica Fletcher — Valuation Rule of Thumb — #1 ranked M&A advisor data
- OPTIS Partners H1 2024 Report — Deal pace and buyer trends