What is an MGA in insurance: the company that underwrites but does not hold the risk.

TL;DR

• An MGA — managing general agent — is a company a carrier authorises to underwrite, quote, and bind policies on its behalf. The carrier still holds the risk; the MGA does the technical work.
• A regular agent sells policies that a carrier designed. An MGA can design the policy itself, set the rates, and decide whether a risk is acceptable — all under a delegated authority agreement with the carrier.
• Carriers use MGAs because they bring specialist knowledge in narrow lines of business that the carrier does not want to run in-house.
• MGAs are distributors, not carriers. They do not collect or hold premium reserves. If claims exceed what the carrier anticipated, the carrier absorbs it.
• MGAs are the backbone of the US specialty and programme insurance market. Lines like excess and surplus, professional liability, and newer areas like cyber rely heavily on the MGA model.

What an MGA actually does

Start with what a normal insurance agent does. An agent sells you a policy. The carrier designed the product, set the rates, and decided what it will and will not cover. The agent's job is to match you with that pre-built product and handle the sale.

An MGA goes much further. A carrier grants it something called delegated underwriting authority. That means the MGA can:

• Design the policy form — what is covered, what is excluded, how the policy reads.
• Set the rates — the premium you pay for a given level of risk.
• Decide whether to accept or decline a risk — this is underwriting, and it is normally the carrier's job.
• Bind coverage — confirm that the policy is in force, without needing approval from the carrier on each individual case.

Some MGAs also handle claims on the carrier's behalf, though many carriers keep that function themselves or use a third-party administrator.

The MGA does all of this under a formal agreement with the carrier. That agreement sets limits: how much authority the MGA has, what kinds of risk it can bind, how much it can write in a given period, and what it must report back to the carrier. The carrier is always in the picture. It is just delegating the technical work.

The difference between an MGA, a regular agent, and a carrier

Three parties, three different jobs.

A carrier writes the policy, collects the premium, holds the reserves, and pays claims. Progressive, Travelers, and Zurich are carriers. The risk sits with them.

A regular agent or broker finds customers and matches them to policies the carrier has already built. The agent earns a commission. It does not design products or set rates. (The full picture of how these channels fit together is in our piece on how insurance reaches you in the US.)

An MGA sits between those two. It has more authority than a regular agent — it can underwrite — but it does not hold the risk. It takes a cut of the premium it writes, typically a percentage built into the rate. It does not sit on reserves. If there are more claims than expected, the carrier that provided the paper absorbs the shortfall.

One useful way to think about it: the carrier is the balance sheet behind the policy. The MGA is the specialist brain that designed the policy and decided whether to write it.

Why carriers use MGAs

Carriers are large organisations. They have broad books of business — auto, home, commercial property — and they are good at managing risk at scale across lines they know well.

But some insurance markets are too small or too technical for a carrier to run efficiently in-house. Think of a carrier trying to underwrite professional liability for veterinarians, or cyber liability for small municipalities. These are specialist areas. The underwriter needs deep knowledge of the specific risks, the right pricing model, and connections to the small community of brokers who place that business.

Rather than build that expertise from scratch, a carrier can find an MGA that already has it. The MGA brings the knowledge and the distribution relationships. The carrier provides the paper — the licensed entity and the balance sheet that backs the policy.

The carrier pays for this by sharing premium. The MGA earns a percentage of the premium it writes and may also share in profit if claims come in better than expected — a structure called a profit commission.

Where MGAs sit in the distribution chain

In the standard distribution chain, an MGA typically sits between a wholesale broker and a carrier.

A retail broker or agent finds the customer and places the risk. If the risk is unusual or hard to place, the retail agent sends it to a wholesale broker — a specialist who knows the right markets. The wholesale broker takes it to an MGA that has authority to write that kind of risk. The MGA underwrites it and binds the policy on the carrier's paper.

Not every transaction goes through every layer. Some MGAs work directly with retail agents. Some deal directly with large commercial buyers. But the wholesale channel — retail agent, wholesale broker, MGA, carrier — is the backbone of how specialty risk gets placed in the US.

This is also the channel that feeds the excess and surplus (E&S) market. E&S is the part of the US insurance market that covers risks that admitted carriers will not take on standard terms. MGAs are central to how E&S business gets underwritten and distributed.

What the MGA market looks like in practice

MGAs vary widely in size and focus. Some are large, well-capitalised businesses that look almost like insurers in their operating model. Some are small, run by a handful of specialists writing one niche line.

Technology platforms have made it easier to launch an MGA. A new MGA can use a purpose-built policy administration system to handle the operational side, find a fronting carrier willing to provide paper, and focus on the underwriting expertise itself. Platforms like Socotra and Insurity Programs are built specifically for MGA and programme business workflows.

The result is that the MGA category has grown substantially over the last decade, particularly in specialty lines and in the insurtech segment, where new insurance brands have often been structured as MGAs backed by a carrier rather than as carriers themselves.

What it means for you as a buyer

If you are buying a specialty insurance product — professional liability, cyber, inland marine, or anything that is not standard personal auto or home — there is a reasonable chance an MGA is involved in the underwriting. You will not always see its name. The policy may carry the carrier's brand. But the pricing decisions and coverage terms may have been made by an MGA acting under delegated authority.

This matters in two situations. First, if you need to challenge a pricing decision or a coverage exclusion, the carrier's underwriting desk may not have made that decision — the MGA did, and understanding that can point you to the right conversation. Second, when an MGA exits a market or loses its authority from a carrier, the products it was writing can disappear or be repriced sharply. Specialty lines buyers who renew through the same broker year after year sometimes get a surprise when the underlying MGA relationship changes.

The MGA model is not a hidden layer or a source of risk in itself. It is an efficient way to bring specialist underwriting to lines that large carriers cannot serve as well. Knowing it exists, and knowing roughly how it works, gives you a clearer view of who actually made the decisions behind the policy you are buying.