How does a named-storm deductible affect CRE financing?

Why named-storm deductibles became a sizing input

Through the 2010s, named-storm deductibles on coastal commercial property typically sat at 2% to 3% of insured value. Following the 2017 to 2024 catastrophe loss cycle (Harvey, Irma, Michael, Ida, Ian, Helene, Milton), reinsurance retrenchment pushed coastal named-storm deductibles to a 3% to 10% range, with 5% common for Florida tier-one and 5% to 10% for high-risk Louisiana parishes per Louisiana Department of Insurance market data.

On a $50M coastal asset, a 5% named-storm deductible is $2.5M of out-of-pocket exposure per event. Lenders treat this as a contingent borrower liquidity claim: the loan documents typically require either a funded deductible reserve, a sponsor-level liquidity covenant sized to cover the deductible, or both.

Some debt funds and life-co lenders accept a parametric wind supplement (a separate, index-triggered policy that pays based on measured wind speed at a defined location, regardless of property damage) to bridge the per-event deductible gap. Parametric coverage settles in days rather than the months typical of an indemnity claim, useful for working capital after a storm.

Debt-yield floors on coastal assets are often 25 to 75 basis points higher than inland. Minimum DSCR is set higher as well. A $50M loan that would size at 65% LTV inland may size at 60% to 62% LTV in coastal Florida or Louisiana on the same NOI.