Surplus Lines Insurance: What It Is and When You Need It

Surplus lines insurance is coverage bought from a non-admitted insurer, one that is not licensed in your state, because no licensed (admitted) insurer will write your risk. It lets hard-to-insure businesses, such as new ventures, companies with a poor claims history or high-hazard operations, buy coverage instead of going without. Two trade-offs come with it: the policy is not backed by the state guaranty fund, and its rates and forms are not approved by the state.

Being placed in surplus lines rarely means you did something wrong. It usually means the standard market changed its appetite, not that your business is a bad risk. Surplus lines is the normal market for hard-to-place coverage, and Menlo places it through the excess and surplus lines market when admitted carriers say no.

What is surplus lines insurance?

Surplus lines insurance is coverage placed with a non-admitted carrier, an insurer that is not licensed in your state. Every state has two markets. Admitted carriers are licensed there, file their rates and policy forms with the state insurance department, and are backed by a state guaranty fund if they fail. The surplus lines (non-admitted) market is where a risk goes when admitted carriers say no. Lloyd's of London is the best-known non-admitted insurer writing American business this way.

The difference is freedom. A surplus lines insurer does not file its rates and forms with the state, so it can price a roofer with two past losses, or write wording for a risk the standard forms never anticipated. You cannot buy from the E&S market directly: you reach it through a licensed surplus lines broker. Our guide to admitted vs non-admitted carriers compares the two markets. "E&S," "excess and surplus" and "surplus lines" all mean the same market.

Why was my business placed in surplus lines?

Your business was placed in surplus lines because your broker could not find a licensed (admitted) insurer to write it on acceptable terms. That is common. Your type of business may be one admitted carriers avoid, such as demolition or nightclubs. Your claims history may be past a carrier's limit, so review your loss runs before renewal. You may be a new business with no track record. Or your property may be in a high-risk wildfire area or on the coast, where many admitted carriers have pulled back. That pullback has pushed the California FAIR Plan to 696,562 policies in force as of June 2026.^[1]

The move from admitted to E&S insurers is often temporary. In a hard market, admitted carriers tighten underwriting and push many ordinary businesses into E&S, then take them back when the market eases. The E&S market keeps growing either way. According to the Wholesale & Specialty Insurance Association, premium reported to the surplus lines stamping offices reached $72.7 billion in 2023, up 14.6% from the year before,^[2] and $90.3 billion in 2025.^[6] What matters for you is that your broker explains what changed in the policy wording, because a surplus lines form does not have to match the one you had before.

What are examples of surplus lines insurance?

The E&S market is easiest to understand through the businesses that buy there. These are classes brokers commonly place in surplus lines, with the reason the admitted market declines each:

How does a surplus lines placement work?

A surplus lines placement follows set steps that a broker cannot skip for convenience. The first is the diligent search: your broker submits your risk to licensed insurers that write that type of coverage, and state law requires proof that they declined. In California, declinations from three admitted insurers that actually write the coverage, reported on the SL-2 form, are the accepted proof.^[4][7] Some coverages skip this step because the state publishes an export list of risks regulators have already found the admitted market will not write.

The submission then goes to a wholesaler. A retail broker rarely has a direct account with an E&S carrier, so a wholesale broker or managing general agent (MGA) with those relationships places the risk and takes its own commission or fee. The licensed surplus lines broker then files the placement and pays the state premium tax and stamping fee. Since the federal Nonadmitted and Reinsurance Reform Act took effect in July 2011, only your home state's tax and licensing rules apply, however many states your business operates in.

Is surplus lines insurance more expensive?

Surplus lines insurance usually costs more, but not because anyone is padding the bill. The premium prices a risk the standard market refused, without a state-filed rate to anchor it, and each placement adds state charges. In California that is a 3.0% surplus lines premium tax plus a 0.18% stamping fee paid to the Surplus Line Association of California, the rate in place since January 1, 2023.^[5] On a $20,000 premium that adds $636. Other states' rates are in our surplus lines tax rates by state table.

Compare total costs, not bare premiums. An admitted quote has taxes built into the filed rate, while a surplus lines quote adds them separately, so the two are not comparable until those charges are included. Your quote should list the premium, any wholesaler fee and each state charge on its own line.

What are the risks of a surplus lines policy?

The main risk is that there is no safety net. An admitted insurer pays into a state guaranty fund that covers claims, up to a legal limit, if the insurer becomes insolvent. Surplus lines insurers do not. California requires every surplus lines policy to say so in bold type on its front page: the insurer "does not participate in any of the insurance guarantee funds created by California law."^[8] If your E&S carrier fails in the middle of a claim, no state fund steps in. That is why financial strength ratings matter so much in the E&S market, and why a careful broker places with insurers holding a strong AM Best rating and tells you the rating before you bind.

The second risk is the policy wording. Because these forms are not filed with the state, E&S carriers often use manuscript forms, wording the carrier drafts itself, instead of standard ISO language. Check for added exclusions, whether defense costs reduce your limit, and whether any definitions are narrower. The third risk comes if you cancel early. E&S policies commonly carry a 25% minimum earned premium, so however soon you cancel, the carrier keeps at least a quarter of the annual premium. Ask about each of these terms before you bind, not after.

This guide is for educational purposes and summarizes standard ISO policy language. Your policy's specific terms, conditions, and endorsements control. Talk to a licensed broker about your actual exposures.

Three things to get before you bind a surplus lines policy

Surplus lines insurance comes from an insurer that is not licensed in your state, used because licensed insurers declined your risk. Ending up there is normal for a hard-to-place business, not a black mark. Before you bind, get three things from your broker: an all-in quote showing premium plus taxes and fees, the insurer's AM Best rating, and a clear comparison of the new policy's exclusions with those in your previous policy.