Definition:Acquisition ratio
📊 Acquisition ratio is a key expense metric in the insurance industry that measures the proportion of net earned premiums consumed by the costs of acquiring new business — including commissions, brokerage fees, and other direct costs associated with selling and onboarding policies. Unlike the broader expense ratio, which captures all operational overhead, the acquisition ratio isolates the cost of getting business onto the books. Insurers, reinsurers, and analysts across all major markets track this metric closely, though its precise composition can vary depending on the accounting framework in use — US GAAP, IFRS 17, or local statutory standards each treat certain acquisition-related costs differently in terms of timing and capitalization.
⚙️ The ratio is calculated by dividing total acquisition expenses by net earned premiums over a given period. What counts as an acquisition expense typically includes agent and broker commissions, contingent commissions, premium taxes, and costs directly tied to the underwriting and issuance of new policies. Under IFRS 17, certain acquisition costs are capitalized as part of the contractual service margin and amortized over the coverage period, which can smooth the ratio's impact on reported earnings compared to regimes where such costs are expensed immediately. In Lloyd's and London market reporting, acquisition costs are a prominent line item in syndicate accounts, often scrutinized by managing agents and capital providers alike. A personal lines direct writer will generally report a lower acquisition ratio than a company heavily reliant on independent brokers or MGAs, because it avoids paying intermediary commissions.
💡 Keeping the acquisition ratio in check is fundamental to an insurer's long-term profitability and competitive positioning. When acquisition costs rise faster than premium growth — a common challenge during soft market cycles or when entering new distribution partnerships — the combined ratio deteriorates even if loss experience remains favorable. Investors and rating agencies such as AM Best and S&P Global Ratings pay particular attention to trends in this ratio when assessing an insurer's operational efficiency and distribution strategy. In fast-growing insurtech ventures, high acquisition ratios are sometimes tolerated in early years as the cost of building market share, but sustained elevation raises questions about the scalability of the distribution model.
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