Definition:Gross written premium (GWP)
💰 Gross written premium (GWP) is the total premium an insurer or reinsurer records on all policies issued during a given period, before any deductions for reinsurance ceded, commissions, or other adjustments. It is the top-line revenue measure of an insurance business and the single most-cited metric for gauging an insurer's market size, growth trajectory, and competitive position. When an industry report states that a carrier "writes $5 billion in premium," it is almost always referencing GWP.
⚙️ GWP captures every dollar of premium that appears on bound policies, whether the coverage period has begun or not and regardless of whether the premium has actually been collected. It includes new business, renewals, and mid-term endorsements. From GWP, the insurer subtracts premiums ceded to reinsurers to arrive at net written premium, which represents the premium the carrier retains and must support with its own capital and reserves. Further down the income statement, earned premium is recognized ratably as coverage is provided over time. A fast-growing carrier can show impressive GWP figures while its earned premium lags behind, which is why analysts scrutinize the relationship between written and earned numbers alongside the loss ratio and combined ratio.
📈 Beyond its role on financial statements, GWP drives critical operational and strategic decisions. Rating agencies like AM Best evaluate premium volume relative to policyholder surplus to assess leverage risk — rapid GWP growth without corresponding capital support is a red flag. MGAs and program administrators report GWP to their capacity providers as a key performance indicator under binding authority agreements, and falling short of or exceeding projected GWP can trigger contract renegotiations. For insurtechs seeking funding, GWP growth rate is often the headline metric investors evaluate first, though savvy backers quickly look beneath it at loss ratios and unit economics to determine whether growth is profitable or simply buying market share at unsustainable cost.
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