MGA Premiums Hit $108.7B as AM Best Flags Capacity Scrutiny

Managing general agents and other delegated underwriting authority enterprises wrote $108.7 billion in US direct premium in 2025, up 17.8% from $92.3 billion in 2024, versus roughly 5% growth for the broader P&C industry (AM Best, June 30, 2026). It is the fifth straight year of double-digit MGA premium growth, and AM Best's own framing of that milestone is not celebratory: the report is titled "Managing General Agents Adapt to Changing Demands and Added Scrutiny."

17.8%

MGA direct premium growth in 2025, versus about 5% for the broader US P&C industry.

5th

Consecutive year of double-digit direct premium growth for the MGA channel.

75%+

Share of delegated authority agreements in 2025 where MGAs hold underwriting authority, up from the prior year.

A Growth Rate the Industry Cannot Match

The gap is the story. MGA premium grew 17.8% in 2025 while the broader US P&C industry grew about 5%, meaning delegated authority added roughly $16.4 billion in new direct premium in a single year, on top of an already-large base. Three-quarters of the way through a decade of double-digit MGA growth, the channel is no longer a niche distribution alternative; it is absorbing a disproportionate share of the industry's incremental volume. AM Best also found that more than three-quarters of delegated authority agreements in 2025 gave the MGA underwriting authority, not just binding or claims-handling authority, a higher share than the prior year (AM Best, June 30, 2026).

David Blades, associate director at AM Best, put the shift in blunt terms: "It's not limited to capacity producers being more selective. There is also a sense of heightened oversight" (AM Best, via Reinsurance News, July 2, 2026). Helen Andersen, an AM Best industry research analyst, framed the same data as a maturity problem rather than a growth problem: "The maturing MGA market will need greater discipline in building portfolios along with successfully adopting newer technologies" (AM Best, via Reinsurance News, July 2, 2026). Read together, the two quotes describe a channel where the volume story and the discipline story have started to diverge, and AM Best is naming that divergence in its own report title before a single loss ratio has deteriorated enough to force the point.

Why Delegated Authority Creates an Actuarial Blind Spot

An MGA does not hold the paper. A carrier or reinsurer sits behind it as the capacity provider, taking the underwriting risk while the MGA handles distribution, binding, and often claims. That structure works well when loss experience flows back to the capacity provider quickly and cleanly. It works badly when it does not, and bordereau reporting, the periodic summary of policies bound and claims incurred that an MGA sends its capacity provider, has never matched the granularity or timeliness of a carrier's own policy administration system. A capacity provider fronting for ten MGAs across different lines is, in effect, running ten separate reserving problems through ten different data pipelines, each with its own reporting lag and its own definition of what counts as an open claim.

That lag matters most for exactly the risk categories where MGAs have grown fastest: specialty and hard-to-place coverage, where loss development patterns are inherently longer-tailed and less standardized than personal auto or homeowners. A capacity provider that only sees six months of bordereau data before deciding whether to renew a program is pricing next year's risk on a truncated view of this year's losses. AM Best's own framing (E&S-adjacent MGA activity has eased over the past 12 to 18 months even as total MGA premium kept climbing) suggests capacity providers are already starting to correct for that blind spot by pulling back from the segments where the reporting lag is worst, rather than waiting for a program to blow up first.

Period	Approximate MGA direct premium	Source
2014 to 2020	Roughly $40 billion to $50 billion, flat	Aon
2023	$92.3 billion direct premium (AM Best); issuing-carrier capacity $23.8 billion (Aon)	AM Best, Aon
2024	$92.3 billion (AM Best) versus $109.2 billion including unreported business (Aon); issuing-carrier capacity $29.1 billion (Aon)	AM Best, Aon
2025	$108.7 billion direct premium, up 17.8% year over year	AM Best

What "Added Scrutiny" Actually Means in Practice

Scrutiny in a delegated authority relationship is not a single lever. It shows up as tighter loss ratio caps written into the binding agreement, more aggressive profit commission clawback provisions, shorter contract terms that let a capacity provider exit a program faster if early loss indications look wrong, and increasingly, direct data feeds that bypass the traditional bordereau altogether in favor of near-real-time claims and bound-policy extracts. Some capacity providers are also pushing MGAs toward algorithmic underwriting platforms specifically because a model produces an audit trail a human underwriter's judgment does not, which is a different kind of scrutiny than a loss ratio cap but serves the same purpose: making the MGA's risk selection legible to the party ultimately paying the claims.

That last point connects directly to a parallel regulatory track. The NAIC's third-party data and model vendor framework, still moving toward adoption, would require state registration and governance disclosure before a vendor's model output can reach a carrier's rate filing. AM Best's capacity-side scrutiny and the NAIC's regulatory-side scrutiny are converging on the same target from different directions: both want the analytics feeding a delegated underwriting decision to be visible and auditable, not a black box the capacity provider or the regulator has to take on faith.

Excess and surplus lines explain a large share of why MGA growth concentrated where it did. Non-admitted carriers can adjust rate and form without the filing delay and public disclosure an admitted-market rate change requires, which is also why MGAs writing E&S business have had the most room to move fastest on both pricing and technology. AM Best's report notes that E&S-adjacent MGA activity specifically has eased over the past 12 to 18 months even as the channel's total premium kept compounding, which reads less like a slowdown in specialty risk demand and more like capacity providers redirecting fresh capital toward newer, less-tested MGA programs in other lines while trimming exposure to E&S books whose early growth is now old enough to have generated a real loss history to judge.

A Decade of Compounding, and a Measurement Problem

AM Best's $108.7 billion figure is not the only estimate in circulation, and the gap between competing counts is itself informative. Aon's 2025 MGA market study put 2024 delegated authority premium at $109.2 billion (Aon, August 2025), roughly $17 billion above AM Best's $92.3 billion figure for the same year, because Aon layered an $18.8 billion estimate for business that never shows up in a statutory filing on top of the $90.4 billion it could trace through regulatory data. Two credible sources measuring the same market a year apart landed nearly $17 billion apart on a base year, which is a direct illustration of the reporting-visibility problem this article is about: if two data-rich analytics shops disagree by that much counting from the outside, a single capacity provider relying on one MGA's bordereau has considerably less certainty than a loss ratio on a filed schedule would suggest.

The trajectory underneath both estimates is unambiguous even if the exact levels differ. Aon's data shows MGA premium sitting in the $40 billion to $50 billion range for most of 2014 through 2020, then compounding roughly 90% cumulatively from 2020 through 2024 and doubling over the full decade. The capacity-provider side has grown alongside it: Aon's report profiled 30 dedicated issuing carriers that collectively held $29.1 billion in direct written premium backing MGA programs at year-end 2024, up from $23.8 billion in 2023, a 22% single-year increase in exactly the balance-sheet capacity AM Best now says is getting harder to access without added oversight. Much of that issuing-carrier capital is, per Aon, "predominately funded by private equity," which adds a third layer of scrutiny beyond AM Best's underwriting discipline and the NAIC's model-vendor framework: private-equity owners of fronting carriers have their own return-on-capital timelines that can push for faster program approval even as the rating agency covering that capital argues for slower, more disciplined growth.

The Agentic Underwriting Wrinkle

The added-scrutiny dynamic lands at an awkward moment for the MGA channel's own technology bet. A cohort of MGAs, particularly in excess and surplus lines, have moved toward agentic AI underwriting engines that can take a submission from intake to bind with minimal human review, precisely the kind of program where a capacity provider's traditional oversight tools (a periodic bordereau review, a human program manager's judgment call) are least equipped to catch a drifting risk appetite early. An MGA that can bind faster than its capacity provider can review the binding logic is, structurally, asking for more trust at the exact moment AM Best says capacity providers are extending less of it. The MGAs that will keep growing through this scrutiny cycle are the ones that can show their capacity partners the model's decision logic and its live loss experience, not just its bind-to-quote speed.

Why This Matters for Actuaries

For actuaries on the capacity-provider side, the practical task is treating delegated authority loss experience with a wider confidence interval than admitted-market direct business carries, until the reporting infrastructure closes the gap AM Best is describing. That means loading MGA program pricing for reporting lag explicitly, not just for expected loss cost, and treating a program's early-duration loss ratio as less credible evidence than the same duration would be on a book the carrier underwrites and reserves itself. A program actuary reviewing a renewal should ask for the same claims-level detail a direct-writer reserving actuary would expect from an internal line of business, not the summarized bordereau an MGA relationship has historically defaulted to, and should treat the Aon-versus-AM-Best measurement gap as a reminder that even the industry-level baseline is an estimate, not a fact.

For actuaries embedded inside MGAs, the report is a signal to get ahead of the scrutiny rather than wait for a capacity partner to impose it: building the data feed, the model documentation, and the loss-triangle transparency a skeptical capacity provider will eventually demand is cheaper before a renewal negotiation than during one. The channel's growth rate is not in question. Whether that growth keeps outpacing the underlying discipline to manage it is now the question AM Best has put a name to, and the private-equity capital sitting behind many issuing carriers means the pressure to keep growing will not ease on its own.