What is premium?

What Determines an Insurance Premium?

Insurance premiums are calculated using actuarial models that assess risk across multiple dimensions:

• Property characteristics: Construction type, age, square footage, roof material and age, electrical/plumbing systems, proximity to fire hydrants and fire stations
• Location risk: Natural disaster exposure (hurricane, wildfire, tornado, hail, flood zone proximity), crime rates, and distance to coast or wildland-urban interface
• Coverage choices: Dwelling coverage limit, deductible amount, endorsements (water backup, jewelry, home office), liability limits
• Claims history: Prior claims on the property (tracked via CLUE report) and the policyholder's personal claims history
• Credit-based insurance score: In most states (California, Maryland, and Massachusetts prohibit this), insurers use credit-related data to price policies — creating a correlation between financial distress and higher insurance costs

Why Are Homeowner's Insurance Premiums Surging?

Multiple converging factors are driving premium increases well above general inflation:

• Climate-driven losses: The frequency and severity of catastrophic weather events has increased. Severe convective storms (hail, tornadoes) now cause as much insured loss as hurricanes in many years.
• Reinsurance repricing: The global reinsurance market (insurance for insurance companies) raised rates 20-40% in 2023-2024, and these costs are passed through to policyholders
• Replacement cost inflation: Rebuilding a damaged home costs 30-40% more than in 2020 due to construction material and labor cost increases
• Carrier withdrawals: As major insurers exit high-risk states (State Farm in California, multiple carriers in Florida and Louisiana), reduced competition allows remaining carriers to raise prices
• Social inflation: Rising litigation costs and larger jury awards in insurance liability cases increase the cost component of premiums

Premiums, Escrow, and Payment Shock

For most mortgage borrowers, insurance premiums are paid through the escrow account. When premiums increase, the servicer adjusts the escrow payment — increasing the total monthly mortgage payment:

• Annual escrow analysis: Servicers review the escrow account annually and adjust monthly payments to cover projected tax and insurance costs. A significant premium increase triggers a payment increase.
• Shortage vs. deficiency: If the escrow account is short (not enough collected) and the borrower is current, the servicer may leave the shortage alone or require repayment in equal monthly payments over at least 12 months, or, if the shortage is less than one monthly escrow payment, require repayment within 30 days. For current borrowers, a deficiency (negative balance) may be left alone or repaid in two or more equal monthly payments, or, if it is less than one monthly escrow payment, the servicer may require repayment within 30 days.
• Payment shock: For a household already at the edge of affordability, a $50-$200/month escrow increase can push them from current to delinquent — especially if combined with property tax increases

Insurance Premiums and the American Distress Index

Insurance premium inflation is contextual evidence of the same household stress the ADI's domains capture through their own members. The Debt Burden domain measures the total household debt service ratio, which rises as housing costs climb. The Safety Net & Buffer domain measures the personal saving rate, which falls as households draw down savings to cover increased costs. The Delinquency domain measures loan delinquency rates, which climb as premium-driven payment shock leads to delinquency. The insurance cost crisis is particularly acute in states that also have high foreclosure risk — Florida, Louisiana, and the Carolinas.