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💰 '''Float (insurance)''' refers to the pool of money an [[Definition:Insurance carrier | insurance carrier]] holds between the time it collects [[Definition:Premium | premiums]] from [[Definition:Policyholder | policyholders]] and the time it pays out [[Definition:Claim | claims]]. Because premiums are received upfront while claims are settled weeks, months, or even years later, the insurer temporarily controls a substantial reservoir of capital that it can invest to generate [[Definition:Investment income | investment income]]. This float is not the insurer's own money — it represents future obligations — but the ability to invest it profitably is one of the defining economic advantages of the insurance business model.

📈 The mechanics of float vary dramatically by line of business. Short-tail lines like [[Definition:Property insurance | property insurance]] or [[Definition:Auto insurance | auto insurance]] produce float that turns over relatively quickly because claims are reported and paid within months. Long-tail lines such as [[Definition:Workers' compensation insurance | workers' compensation]], [[Definition:General liability insurance | general liability]], and [[Definition:Medical malpractice insurance | medical malpractice]] generate float that can persist for years or even decades, as claims involving bodily injury or latent disease take far longer to develop and resolve. Carriers invest float across a range of asset classes — primarily [[Definition:Fixed income | fixed-income securities]] for regulatory and liquidity reasons — and the [[Definition:Investment yield | yield]] earned on these assets directly impacts the company's overall profitability. Warren Buffett has famously described Berkshire Hathaway's insurance operations as a vehicle for generating "cost-free float" when [[Definition:Underwriting profit | underwriting results]] break even or better, effectively giving the company an interest-free loan from policyholders.

🧮 Float matters strategically because it shapes how insurers price products and compete. In a low-interest-rate environment, the investment income earned on float shrinks, forcing carriers to demand higher [[Definition:Underwriting margin | underwriting margins]] and tighten [[Definition:Rate adequacy | rate adequacy]]. Conversely, rising rates make float more valuable and can enable more competitive pricing, sometimes contributing to a softening [[Definition:Underwriting cycle | underwriting cycle]]. For [[Definition:Insurtech | insurtech]] startups and [[Definition:Managing general agent (MGA) | MGAs]] that do not hold their own float — because premiums flow to the [[Definition:Risk-bearing entity | risk-bearing carrier]] or [[Definition:Reinsurer | reinsurer]] — this economic lever is unavailable, which fundamentally changes their path to profitability and explains why some insurtechs eventually seek their own [[Definition:Insurance license | carrier license]].

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Investment income]]
* [[Definition:Underwriting profit]]
* [[Definition:Loss reserve]]
* [[Definition:Combined ratio]]
* [[Definition:Underwriting cycle]]
* [[Definition:Asset-liability management]]
{{Div col end}}

Definition:Float (insurance) - Revision history

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