is the insurance of things going wrong this year: crashed cars, flooded kitchens, sued companies, grounded aircraft. Life insurance makes promises that can run for decades; general insurance usually writes twelve-month contracts and reprices them at renewal, though some commercial policies run two years or more.
First, a naming problem that trips up a lot of applicants' research. The UK says (GI). The US says property and casualty (P&C). Much of the rest of the world says non-life. Three names, one industry: everything that is not life insurance or pensions. Most of the internet's actuarial content is American, so when a video or textbook says P&C, it means GI. And "general" does not mean the work is general: pricing and funds are life and pensions work, a different practice area from GI.
Personal lines and commercial lines
The market splits by who is buying.
| Aspect | Personal lines | Commercial lines |
|---|---|---|
| Sold to | Individuals | Businesses |
| Products | Motor, home, travel, pet | Property, liability, marine, aviation, energy, cyber |
| Shape | Millions of near-identical annual policies | Fewer, larger, often individually negotiated risks |
is a volume business: huge numbers of similar policies, priced statistically, mostly on annual contracts. runs from a corner shop's liability cover all the way up to risks so large, unusual or international that no single insurer wants to hold them alone.
The London Market
The is the cluster of insurers and brokers around Lime Street in the City: Lloyd's of London and the company-market firms alongside it. Its business is large, complex and international commercial and speciality risk: container ships, airline fleets, energy platforms, cyber attacks on multinationals. If a risk will not fit on a price-comparison site, there is a decent chance it ends up priced here. Lloyd's gets the next lesson to itself.
What cover costs right now
Two anchor numbers from the Association of British Insurers' quarterly premium trackers, both for Q1 2026:
- Average paid comprehensive motor premium: £560, which is £20 (3.4%) lower than a year earlier.
- Average combined buildings-and-contents home premium: £375, 5% below the £396 of Q1 2025, and the fourth consecutive quarterly fall.
Two things to know about these figures. First, they are paid prices, not the quote-based indices that headlines prefer. A quote index measures prices offered; a paid tracker measures prices actually transacted, and because shoppers buy at the cheap end of what they are shown, quote indices sit higher. Both kinds cover new business and renewals.
Second, premiums are falling while claims costs keep rising. Insurers paid £2.9bn of motor claims in Q1 2026 alone, £1.9bn of it on vehicle repairs, with the average accidental damage claim at £3,699, up 8% in a single quarter. The repair inflation is structural: modern cars carry sensors and cameras in every bumper, parts cost more, and repairs take longer.
Falling prices against rising costs is the at work: the industry competes prices down while risk capital is plentiful, then pushes them back up once capital grows scarce, so premiums and claims costs can move apart for years at a time. The lesson covers the cycle properly. The trackers are quarterly, so check the ABI's latest release before you quote either figure.
Who regulates it all
UK insurers are dual-regulated. The (Prudential Regulation Authority, part of the Bank of England) handles prudential supervision: does this insurer hold enough capital to pay every valid claim, even in a bad year? The (Financial Conduct Authority) handles conduct: are customers being treated, and priced, fairly? Actuarial work feeds answers to both.
Where actuaries come in
Every product in the table shares one awkward feature: the seller must name a price before knowing what the product will cost. Someone has to estimate that cost, defend the estimate, and keep checking it as claims arrive. That someone is usually the actuary. The rest of this module maps the market's stranger corners: Lloyd's, and , then . The modules after that teach the actual jobs, starting with pricing.
Check your understanding
A candidate in a general insurance interview says the work they are most excited about is annuity pricing. Why does that answer misfire?
Two pricing teams work on very different books: one holds millions of near-identical annual motor policies, the other a few dozen individually negotiated energy contracts. Which team can lean hardest on statistical pricing of its own past claims?
An actuary is asked to model whether their insurer could still pay every valid claim after an exceptionally bad year. Which regulator's question is that work answering?
For the same quarter, the ABI's paid-premium tracker reports a lower average motor premium than the quote-based indices. Why?