Outlook: The Evolution of the MGA Model in the United States

The managing general agent (MGA) model has become one of the most powerful growth engines in the global insurance industry, and its evolution is particularly evident in the United States.

The numbers tell their own story. US MGA premiums exceeded $114bn in 2024, the latest full year for which data is available, growing 16% year-on-year, significantly faster than the broader P&C market. More than 850 MGAs are now identified in U.S. statutory filings, with many additional smaller MGAs below reporting threshold. 

From our vantage point, we are also seeing rising demand for high-quality incubation support and operational infrastructure as fast-scaling MGAs look to build sustainable platforms across the US market – creating a sophisticated and highly powerful ecosystem supporting the growth and development of MGAs in the US. 

A Niche No More

For a model once seen primarily as a niche distribution channel, this scale is remarkable. Yet the growth of MGAs is not simply about premium expansion. What we are witnessing in the US is a structural shift in how underwriting expertise is organised and deployed.

At its core, the US remains the most dynamic MGA market globally because it combines three powerful drivers: risk capital flexibility, specialist underwriting talent and broker demand for speed and expertise.

MGAs are much more than simply extensions of insurer distribution. Increasingly they function as specialist underwriting platforms, bringing deep, entrepreneurial class expertise, technology-enabled underwriting and access to diversified capacity sources including insurers, reinsurers and alternative capital providers.

This is particularly visible in specialty commercial lines and emerging risk classes such as cyber and climate-related exposures. In these areas, underwriting expertise and speed to market are critical, and MGAs are often better positioned than large carriers to respond quickly.

Seeking Out Specialist Partners

At the same time, insurers are becoming more deliberate about how they deploy underwriting resources. Rather than building internal capability across every niche class of business, many carriers are choosing to partner with specialist MGAs. As a result, MGAs are playing an increasingly strategic role in the underwriting value chain.

Alongside this growth, the MGA model itself is evolving. At its core, the sector is still driven by individual underwriting talent, where a recognised name and broker following can form the foundation of a new venture. For many brokers, it is the individual underwriter, rather than the brand, that builds trust and drives placement.

However, while that individual expertise remains the entry point, sustainable MGA businesses now require a broader institutional framework around it. The most successful platforms are those that can wrap strong underwriting talent with the infrastructure, governance, and scalability needed to support long-term growth.

This includes robust governance structures, strong regulatory oversight, embedded service capabilities and sophisticated data and technology infrastructure. Operational capability is critical. As MGAs scale, the ability to manage policy administration, claims, reporting and compliance efficiently becomes essential.

The MGA Ecosystem is Developing

Increasingly, MGAs are operating within coordinated support structures that provide the operational backbone needed to scale. This allows underwriting teams to focus on what they do best, developing specialist products and managing risk, while relying on integrated services for the surrounding operational complexity.

For capacity providers, this infrastructure is also becoming a key factor in determining which platforms are able to grow sustainably in the next phase of market maturity.

Looking ahead to the rest of 2026 and beyond, growth in the US MGA market is likely to be defined not only the number of MGAs entering the market but also by the quality of the platforms supporting them. Three structural trends are already shaping this next stage.

The first is the continued institutionalisation of MGA platforms themselves. Successful MGAs are integrating underwriting expertise with claims management, regulatory frameworks and digital operating models that allow them to scale efficiently across multiple lines and territories.

The second trend is greater bifurcation within the market. The sector is increasingly separating into true specialist underwriting leaders on one side and efficient capacity-following models on the other. The middle ground, where platforms duplicate costs without establishing clear underwriting leadership, will face increasing pressure.

The third trend is deeper capital partnerships. Insurers and reinsurers are becoming more strategic about how they allocate capacity, prioritising platforms with strong governance, claims oversight and transparent reporting.

Reshaping How Underwriting Expertise is Organised

What we are seeing in the US is a gradual reorganisation of how underwriting expertise sits within the insurance market.

Carriers continue to provide the capital and balance sheet strength that underpin the industry. MGAs, meanwhile, are increasingly acting as specialist underwriting hubs – bringing deep class knowledge, speed to market and the ability to develop products around emerging risks. By combining underwriting talent with strong governance, operational capability and close alignment with their capacity partners, MGAs are harnessing the ecosystem around them to improve the strength of their underwriting proposition, improve their scalability and, ultimately, their valuation.

Over time, this is creating something more coordinated than the traditional delegated authority model. Underwriting expertise, operational infrastructure and capital support are becoming more tightly integrated, and more highly valued by the wider industry. 

That shift is quietly redefining how insurance capacity is deployed – and it is likely to shape the next phase of MGA growth in the United States.