Guides
Excess and surplus lines insurance explained
What E&S insurance is, why risks go to non-admitted insurers, what you give up in guaranty fund protection, and how surplus lines taxes and filings work.
Excess and surplus lines (E&S) insurance is coverage issued by a non-admitted insurer, one not licensed in your state, for risks the standard market declines or cannot write on its approved forms and rates. It is placed through a licensed surplus lines broker, usually working with a wholesale broker or managing general agent, and it is regulated differently: freedom on rates and forms, state premium tax, and generally no guaranty fund behind the policy. "Excess" in the name has nothing to do with excess liability coverage; it is an older term for the same non-admitted market.
How big the E&S market is
According to AM Best's annual surplus lines report, as reported by Insurance Business in 2026, surplus lines direct premiums written reached $143.3 billion in 2025, up 10.4% from $129.8 billion in 2024. That is 12.9% of total U.S. property and casualty premiums and 27.5% of commercial lines premiums, up from 3.6% and 7.1% in 2000. General liability was more than $51 billion of the total. AM Best also said wholesale brokers without binding authority wrote 45% of the premium and managing general agents and program managers nearly 25%. Growth has been slowing for domestic surplus lines insurers, but E&S remains the home for exposures the standard market treats with caution. Insurance Journal's coverage of the 2024 rankings put Berkshire Hathaway and AIG at the top of E&S premium. Lloyd's is another large presence, and Kinsale Insurance focuses on the E&S market. See Berkshire Hathaway and AIG for the group profiles.
Why a risk lands in E&S
Admitted insurers file their forms and rates with the state department of insurance and have to follow them, which makes them predictable and limits their appetite for unusual risks. A non-admitted insurer can write manuscript wording and price the exposure without a filing. Typical E&S business:
- Catastrophe-exposed property: coastal, wildfire or earthquake locations where admitted capacity is thin. AM Best says cat-exposed property, large construction, environmental and professional liability will probably stay in the E&S market.
- Liability for risks with claim histories or severity: habitational and contractors' work, bars and nightclubs (liquor liability insurance and dram shop laws), assault and battery exposures, security firms, cannabis (Cannabis business insurance).
- New or unusual operations, businesses with heavy loss runs and anything the carrier calls "no appetite."
- Excess and umbrella layers above a primary program (umbrella vs excess liability).
- Specialty lines such as cyber: AM Best noted that surplus lines carriers write most primary and excess cyber policies.
Entry to E&S usually follows the cycle. When admitted carriers tighten, business flows to E&S; when they loosen, some comes back. See hard and soft insurance markets: what the cycle means for buyers.
The legal framework
Each state regulates its own surplus lines market, but the federal Nonadmitted and Reinsurance Reform Act of 2010 (NRRA) set the national rules.
- Home state controls. Only the insured's home state, the state of its principal place of business, may require premium tax on a nonadmitted policy (15 U.S.C. 8201). If a risk is in several states, the home state collects and states may allocate the tax among themselves.
- Broker licensing. A surplus lines broker licensed in the home state places the coverage. The state's rules govern the broker's duties.
- Eligibility. States generally may not impose their own eligibility rules on a U.S.-domiciled nonadmitted insurer except as the Non-Admitted Insurance Model Act provides, and they cannot block placement with a non-U.S. insurer listed on the NAIC's Quarterly Listing of Alien Insurers (15 U.S.C. 8204).
- Diligent search. Most states require the broker to try the admitted market first and document declinations, commonly from a set number of admitted insurers. The NRRA excuses the search for an "exempt commercial purchaser" if the broker disclosed that the coverage may be available from the admitted market and the buyer then requested the nonadmitted placement in writing (15 U.S.C. 8205).
- Exempt commercial purchaser. Under 15 U.S.C. 8206, a buyer qualifies only if it employs or retains a qualified risk manager, has paid more than $100,000 in nationwide commercial property and casualty premiums in the prior 12 months and meets at least one size test. The statutory base figures are net worth over $20 million, revenue over $50 million, more than 500 employees, or a nonprofit or public entity with a budget of at least $30 million. Some dollar amounts are adjusted for inflation every fifth January 1. Small businesses are rarely exempt.
What you give up, and what you get
| Admitted insurer | Non-admitted (E&S) insurer | |
|---|---|---|
| Rates and forms | Filed with the state | Not filed; manuscript wording and negotiated pricing |
| Guaranty fund protection | Yes, subject to the state's cap | Generally no |
| Cancellation and nonrenewal | State statutes apply | The policy's conditions govern; many states exempt E&S from these notice rules |
| Premium tax | Paid by the insurer in the state | Paid by the insured through the broker; home state rate |
| Typical terms | Standard ISO or carrier forms | Higher retentions, claims-made forms, defense inside limits, minimum earned premium |
| Placed by | Agent or broker | Surplus lines broker, often through a wholesale broker or MGA |
The guaranty fund point matters. State property and casualty guaranty funds are financed by assessments on licensed insurers, and most states cap claim payments at $300,000, according to the National Conference of Insurance Guaranty Funds. A non-admitted insurer is not a licensed member, so if it fails there is typically no fund to pay your claim. Financial strength is therefore the control you have: check the insurer's AM Best rating (AM Best ratings explained for business buyers). AM Best reported no surplus lines impairments in 2025 or the first half of 2026.
Read the policy, not the label. The wording may exclude things the admitted form covers, or limit them by endorsement. how to read a commercial policy: declarations, forms and endorsements explains the layout.
How the money works: a hypothetical
Say a Texas nightclub pays a $50,000 annual premium for a surplus lines liability policy. This is an illustration using the 2026 rates published in Troutman Pepper Locke's Surplus Lines Manual, which you should confirm with the stamping office before relying on them.
| Item | Rate | Amount |
|---|---|---|
| Premium | $50,000 | |
| Texas surplus lines tax | 4.85% | $2,425 |
| Stamping fee | 0.04% | $20 |
| Total before broker or policy fees | $52,445 |
Tax rates differ by home state. The same manual lists California at 3%, New York at 3.6% plus a 0.15% stamping fee, Illinois at 3.5% plus a fire marshal tax of up to 1%, and Florida at 4.94% plus a service fee; Florida's Surplus Lines Service Office cut its fee in half for policies incepting on or after July 1, 2026. State tax and filing rules are in surplus lines taxes, stamping fees and diligent search, and workers' comp and benefits requirements by state and the state guides (Texas, California, Florida, New York, Illinois) cover regional differences.
How a surplus lines placement works
- Your retail agent submits the account to admitted carriers first and records declinations.
- If none will write it, the agent goes to a wholesale broker, MGA or a surplus lines broker with access to E&S markets (wholesale brokers and surplus lines placement: how hard risks get insured, Managing general agents (MGAs): what they are and what they mean for buyers).
- The surplus lines broker obtains quotes, discloses the non-admitted status, and issues a binder.
- The broker files the policy with the stamping office or state, if the state requires it, and remits the tax.
- You receive a policy with a surplus lines notice stating that it is issued under the state's surplus lines law and is not protected by the guaranty fund.
Questions to ask your agent
- Which admitted carriers declined, and why?
- What is the insurer's AM Best rating and domicile?
- How do the forms differ from a standard ISO form, for example on exclusions, defense costs and notice conditions?
- What are the taxes, fees, minimum earned premium and cancellation terms?
- Can this move back to the admitted market, and what would it take?
Key takeaways
- E&S is non-admitted coverage placed by a licensed surplus lines broker after the admitted market declines the risk.
- You trade filed forms, filed rates and guaranty fund protection for flexibility; check the insurer's financial strength.
- The home state collects the premium tax, which you pay on top of the premium, and rates vary by state.
- The NRRA's exemption from the diligent search is for large buyers with a risk manager; most small businesses go through the full process.
- Read E&S wording closely: exclusions, defense inside limits and notice conditions often differ from the standard form.