Most participants in insurance distribution move risk toward a carrier; an MGA is trusted to act as the carrier within defined limits. That single fact — delegated binding authority — shapes everything about the MGA's position in the market and the quality of the commission a retail agency earns through one. This piece defines the MGA, places it in the distribution chain, and explains the financial architecture that makes the sector a magnet for institutional capital.
§ 01 · What an MGA isDelegated binding authority.
A managing general agent is an independent entity a carrier authorizes to underwrite, manage, and bind policies on its behalf — typically across many states and concentrated in complex or emerging lines (cyber, professional liability, niche personal lines) where the carrier lacks internal underwriting depth. An MGA can quote, bind, and issue within agreed risk parameters without per-risk carrier sign-off, and often appoints producers, arranges reinsurance, and handles claims — functions usually reserved for the carrier itself.
Two distinctions matter. A surplus-lines broker also operates wholesale and places hard-to-place risk with non-admitted carriers, but generally holds no binding authority — the formal delegation is what makes an MGA an MGA. And a managing general underwriter (MGU) is the functional equivalent in life and health rather than property and casualty.
§ 02 · The value chainWhat the MGA delivers to each side.
The MGA sits between carriers and retail agents and delivers distinct value to each. To the carrier: low-cost, low-execution-risk entry into a specialty or geographic segment without building internal underwriting infrastructure, plus profitable risk selection in niches the carrier can't efficiently underwrite. To the retail agent: access to specialty products and markets unavailable through standard admitted appointments, the MGA's underwriting expertise on complex risks, and a competitive edge in niche lines. Much of this runs in or adjacent to the excess-and-surplus (E&S) market — the specialty sector for risks admitted carriers decline — which is itself a key capability MGAs extend to agents lacking direct E&S appointments.
§ 03 · The economicsHigh margins, three revenue streams.
A well-run MGA is capital-efficient: as an intermediary that doesn't assume balance-sheet risk, its costs are mostly people and technology, producing EBITDA margins in the high-20s to low-30s and strong free-cash-flow conversion. Revenue arrives in three channels.
| Revenue stream | Share of total | What it is |
|---|---|---|
| Overrides (commissions) | 60–80% | Commissions from carriers on all placed business — the recurring core |
| Profitability contingents | 20–30% | Carrier bonuses when the placed book meets loss-ratio targets |
| Service fees | 5–10% | Claims administration, inspections, and other services |
The override is the retail agent's hidden cost. Business placed through an MGA nets a lower commission than a direct carrier appointment would — because the MGA's fee comes out of the same commission stack. Convenience and access have a price, and it is paid in margin.
§ 04 · The regulatory weightAuthority cuts both ways.
Binding authority is power, and it carries a demanding compliance burden. MGAs face stringent state-by-state licensing, fiduciary obligations on premium funds held in trust, and the NAIC's MGA model framework; those operating in the Lloyd's market as coverholders absorb an additional layer of oversight. And because the MGA holds the authority, it is the first line of accountability for any bind outside the agreed guidelines — an errors-and-omissions exposure that sits on the MGA before it reaches the retail agent. For an agency owner, the takeaway is that MGA-sourced revenue is a different animal in a valuation: lower net commission, distinct risk profile, and a quality lens a buyer will apply. The companion pieces cover how the sector trades in M&A and how agencies operate through wholesale channels.
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Terminology on this shelf
- Managing general agent (MGA)
- An independent entity with carrier-delegated binding authority that underwrites, manages, and binds policies on the carrier's behalf.
- Binding authority
- Delegated permission to quote, bind, and issue policies without prior per-risk carrier approval.
- Surplus-lines broker
- A wholesale participant placing risk with non-admitted carriers — but, unlike an MGA, without binding authority.
- E&S market
- The excess-and-surplus specialty market for complex risks that standard admitted carriers decline.
- Overrides
- The MGA's core revenue (60–80%) — commissions from carriers on placed business, taken from the same commission stack the retail agent shares.
- Profitability contingents
- Carrier performance bonuses (20–30%) paid when the placed portfolio meets loss-ratio targets.