12.5% of US P&C premium now flows through MGAs and programs. $125 billion, more than double from seven years ago. Carriers that once owned the full insurance value chain are receding, increasingly providing just paper and capital to an ecosystem that someone else is assembling.
This is a structural shift in where value is created in insurance. Depending on where you sit, it looks different. I spent several years on the carrier side, in strategy, technology and operations. I built two MGAs. More recently, I work with commercial insurance buyers and see this assembled ecosystem from the policyholder’s perspective.
What gets lost?
What gets lost is accountability for the assembled product. An integrated carrier underwrites, prices, issues the policy, and pays the claim. The entity closest to the policyholder is the same one bearing the risk. Separate capital from distribution, and this alignment breaks. The MGA closest to the risk does not bear it. The reinsurer that bears it has no relationship with the policyholder. The fronting carrier on the declarations page may do neither. Each party owns its piece. Nobody owns the whole.
Why do carriers hand over underwriting authority?
The standard answer is niche expertise and speed to market. Carriers cannot build the required specialist underwriting capabilities fast enough, especially in newer lines that demand domain knowledge, fast product iteration, and specialist distribution: cyber, environmental, construction, to name a few. The MGA delivers the expertise, the carrier earns fee income without building out the overhead. Everybody is happy. So far.
MGAs are also pulling entrepreneurial underwriting talent out of carriers with modern analytics, less overhead, and equity. That talent drain is part of why carriers struggle to build the capabilities in-house.
But MGAs do not stop at specialty lines. They span traditional lines too: commercial auto, property, workers’ comp. They compete on distribution efficiency and pricing models as much as domain expertise. Over half of the delegated business is now non-exclusive, meaning MGAs can move their book when a fronting carrier offers better economics. Carriers are losing power.
What brokers and customers see
Brokers want access to the best insurance products, especially in lines where standard carriers struggle to compete. A growing share of retail brokers route their business through wholesalers and MGAs. The MGA channel offers them capacity, specialization, and speed that the traditional carrier appointment does not.
Customers notice almost none of this structural change. They interact with the broker. The declarations page shows the fronting carrier’s name, and most policyholders assume that is the company that evaluated and priced their risk. The MGA is invisible to them. So is the reinsurer that bears the actual loss exposure.
When something goes wrong, the policyholder discovers that the coverage was assembled by parties they never knew about, through a chain where no single party was responsible for making sure the assembled product works as a whole. The customer also carries counterparty risk they cannot evaluate: if the capital behind the program shifts or withdraws, the strength of the promise on the declarations page may not be what it appears.
Fronting carriers and risk capital
Fronting carriers are the infrastructure: admitted licenses, regulatory compliance, paper. They cede some, most, or all of the risk to reinsurers. Their economics run on fees. State National, MS Transverse, Obsidian, and Clear Blue are among the largest, with a growing list behind them.
Behind the fronting carriers sits a deepening pool of risk capital. Traditional reinsurers participate alongside ILS funds, sidecars, and collateralized structures, each with different risk appetites and time horizons. Lloyd’s remains a major market for program business, combining delegated underwriting authority with a centralized capital and regulatory framework.
The reinsurance broker as assembler
As the ecosystem fragments, the reinsurance broker’s role has shifted. Increasingly, the reinsurance broker acts as the architect of the capital stack behind program business — deciding which MGAs get capacity, on what terms, and with what collateral requirements. Aon Re, Guy Carpenter, and Gallagher Re are all building out their program and MGA practices. New players are entering the space — marketplaces like Accelerant are offering MGAs a different path to capacity. The work now resembles financial engineering as much as traditional reinsurance placement.
Friction in the machine
A challenge in this model is the volatility of capital. After the ransomware surge in 2020 and 2021, several major reinsurers pulled back from cyber programs. Capacity tightened, rates spiked. As loss ratios improved, capital returned. Swiss Re sharply reduced its share of fronting-related premiums between 2022 and 2024. I know several MGAs who lost their capacity partner in a difficult market and could not replace it. For an MGA without its own balance sheet, losing capacity is a death sentence.
The assembled model also breaks feedback loops that integrated carriers take for granted. When the MGA underwrites, a separate TPA handles claims, and the data connecting them flows through delayed bordereaux reports, the link between claims experience and underwriting decisions fractures.
And then there is outright fraud. In mid-2023, Vesttoo, an ILS marketplace startup, was found to have used fabricated letters of credit to back collateralized reinsurance — roughly $4 billion in exposure across multiple fronting carriers. The collateral that was supposed to back the reinsurance didn’t exist. Multiple fronting carriers were left holding exposure they thought was ceded.
Who is accountable?
Insurance is a promise to pay a claim. That basic value often gets lost in discussions about the MGA model. Fronting carriers remain the regulated entity — the state insurance department holds them responsible for every program they front. But can a capital-light operation earning fee income maintain real oversight of dozens of programs it does not actually underwrite? AM Best’s Delegated Underwriting Authority Enterprise assessment tries to impose discipline. The next MGA program is always waiting to be onboarded.
When I was building an MGA, the carrier’s oversight was a monthly bordereaux review and a quarterly call. That was it.
More than a quarter of the premium backing fronting and program carriers now comes from reinsurers with no AM Best rating. The E&S market approached $100 billion in 2024, roughly 2.5 times its 2018 volume — a lot of premium flowing through a regulatory channel that was designed as an exception.
Misaligned incentives
Every player in this value chain optimizes for its own economics. MGAs optimize for premium volume (their commission is tied to it). Fronting carriers optimize for fee income on gross written premium. Reinsurers want diversified risk at adequate pricing, and capital providers want uncorrelated return. Brokers want speed and market access. None of these are wrong. None of them add up to “make sure the policyholder’s coverage works.”
MGAs that bring genuine domain expertise create real value — better underwriting, faster products, risks covered that wouldn’t be otherwise. But the assembled model has coordination costs that nobody is yet compensated to solve. The complexity adds cost and opacity for everyone, from the general counsel reviewing program agreements to the examiner trying to understand the capital behind the policy.
Reinsurance brokers see more of the full picture than most participants. Whether they, or marketplace models, or someone else takes on the role of true assembler is an open question. Until someone does, the gaps between the pieces will keep surprising the people who discover them last: the ones filing the claims.
