Climate change is already pushing up the cost of UK insurance. Warmer, wetter, and more volatile weather means more claims from flooding, storms, and heat, and insurers price that rising cost into the premiums everyone pays. The effect is uneven: households in high-risk areas feel it most, but the market-wide claims bill reaches every policyholder.
How weather becomes a premium
An insurer prices a policy from the expected cost of claims. When storms and floods grow more frequent and severe, the expected cost rises, and so does the price. The mechanism is direct: more paid out in claims means more charged in premiums at the next renewal. Our guide to how insurers calculate risk and price cover explains the maths behind this.
The change is not only about big events. A slow shift in average weather, such as heavier winter rainfall, raises the everyday claim count and the baseline price even in years without a headline disaster.
Where the pressure shows up
Climate risk bites hardest on property cover, because buildings sit still while the weather moves over them.
- Flood: repeated inundation in at-risk towns lifts premiums and, in the worst cases, makes cover hard to find.
- Storm: heavier winds and rainfall drive more escaped-water and structural claims.
- Heat: prolonged dry spells trigger subsidence, a slow and costly form of damage.
Our analysis of home insurance claims data shows how weather already dominates the claim mix, and our guide to why home insurance premiums are moving tracks the trend.
Why some households are hit harder
Two households with identical homes can face very different prices if one sits in a flood zone and the other on high ground. The insurer prices the location, not the person, so the climate signal is sharp at the postcode level. That is why Flood Re exists: a scheme to keep affordable cover available for households at high flood risk. Our explainer on how Flood Re works sets out the mechanism.
What you can do
You cannot change the weather, but you can reduce your own exposure and your price.
- Check your flood and subsidence risk before you buy, not after.
- Add resilience measures such as flood gates or improved drainage where practical.
- Shop around at renewal, because climate loading varies between insurers.
- Read your policy’s weather cover so you know what is included before an event.
The Financial Conduct Authority expects firms to price climate risk fairly and to explain it, and the Consumer Duty reinforces that vulnerable customers should not be priced out without reason. Read how the Consumer Duty changes what firms owe you.
Sources
- Insurers — how climate risk is priced.
- Financial Conduct Authority (FCA) — fair pricing and climate risk.
- Association of British Insurers (ABI) — weather and climate claims data.
- Existing guide: why home insurance premiums are moving.