It is likely you already have a preliminary understanding of life insurance; you pay premiums, and if you die, your family gets a payout. That answer describes the death-cover end of a protection market selling about two million new policies a year, UK life insurance is two different businesses trading under one label, and the death cover makes up a far smaller share of the money within the industry.
Business one: protection
Protection is the business of products that pay out when something goes wrong with a human body.
- pays a lump sum if you die within a fixed term, say the 25 years of your mortgage. Survive the term and it pays nothing.
- pays whenever you die. Kept up, it always ends in a claim.
- pays a lump sum on diagnosis of a specified serious illness, while you are alive to use it.
- pays a replacement income while illness or injury stops you working.
According to Swiss Re's Term & Health Watch (2026 edition): new protection sales fell 1.8% in 2025, and , the biggest seller, fell 2.9%. The one bright spot was , up 11.9% to about 260,000 policies. That is a mature market, drifting gently downwards, with a single growth product.
Business two: long-term savings and retirement
The second business barely mentions death to the customer. It is about money and time: annuities, pensions and bonds, and the legacy savings of an earlier era.
The product to start with is the : you hand an insurer a lump sum, and it pays you an income for as long as you live. That is insurance against outliving your money/savings. When yields (the return on UK government bonds) rose sharply in 2022, the income an insurer could offer per pound of premium rose with them, and individual annuity sales revived; the Association of British Insurers (ABI) reported sales reaching ten-year highs. The exact figures move every year, so check the current ones at abi.org.uk before you quote one. However, the direction is stable: yields up, rates up, sales up.
The other two families get one line each here. A policy invests the customer's money in funds, so the policy value rises and falls with those investments and the policyholder, not the insurer, carries the market risk; is the legacy savings product of the twentieth century, now largely closed to new customers.
And the idea scales: the defining growth engine of the whole UK life market is insurers taking on the pension obligations of schemes through (the first module of our pensions course can help if these are unfamiliar to you).
By assets and by actuarial headcount, this second business now dominates the UK life industry.
Dying too soon, living too long
The two businesses carry opposite risks, and the distinction organises everything else in this course.
- Protection's death cover carries : the insurer loses if customers die sooner than expected.
- Retirement business carries : the insurer loses if customers live longer than expected, because every extra year of life is another year of payments.
It is the same mortality science, pointing in opposite directions. An insurer writing both holds a partial : if deaths come in lighter than assumed, the book gains and the book loses.
Where this course goes
This module finishes the market map: the protection products one at a time, then the savings and retirement products, then the firms and which type each is. Module 2 covers the boom properly. Module 3 teaches the and maths that prices everything you have just read about. Modules 4 and 5 cover the balance sheet, reinsurance and the job itself. By the end, you should be able to answer "so what does a life insurer actually do?" from the inside.
Check your understanding
A graduate tells a life interviewer that the industry is mainly in the business of paying out when someone dies. Why does that misread the UK market?
Gilt yields have risen sharply over the past year. A saver about to buy an annuity asks what that does to her quote. What should she expect, and why?