
When you purchase life insurance, you are buying peace of mind. You are securing a financial safety net to protect your loved ones should the worst happen. But have you considered how the rising cost of living could affect that safety net over time? A lump sum that seems substantial today might be worth significantly less in 10, 20, or 30 years.
This is where index-linked life insurance comes in. It's a powerful feature designed to "inflation-proof" your policy, ensuring the payout your family receives has the same purchasing power in the future as it does today. In this comprehensive guide, we'll explore exactly how indexation works, who it's for, and whether it's the right choice for your financial protection needs.
Inflation is the rate at which the general level of prices for goods and services is rising, and subsequently, purchasing power is falling. A pint of milk, a loaf of bread, energy bills, and school uniforms all cost more than they did a decade ago. According to the Office for National Statistics (ONS), the Consumer Prices Index including owner occupiers’ housing costs (CPIH) rose by 3.8% in the 12 months to April 2024.
While this might not sound like a huge amount in a single year, the cumulative effect over the long term can be dramatic. Let's imagine a £200,000 level life insurance policy taken out today.
Index-linked cover directly combats this erosion of value. It works through a simple, yet effective mechanism:
By automatically increasing your cover amount, an index-linked policy ensures your financial protection grows alongside the cost of living, providing a consistent and meaningful benefit for your family, no matter when they might need it.
Understanding the practical details of how indexation works is key to deciding if it's right for you. It’s not just a case of everything increasing by the rate of inflation.
Once a year, your insurance provider will write to you ahead of your policy anniversary. This letter will outline:
You are then given a choice. You can either accept the increase or decline it.
This is a crucial feature of index-linked policies. You are never forced to accept an increase. If your financial circumstances have changed or you feel the premium is becoming too high, you can simply say "no" to that year's increase.
What happens if you decline?
This is the most misunderstood aspect of indexation. Your premium does not simply increase by the rate of inflation. The increase is typically much higher.
This is because the new premium is calculated based on two factors:
Insurers use a multiplier to calculate the premium increase. A common formula looks like this:
Premium Increase % = Inflation Rate % x Age-Related Multiplier
This multiplier is often around 1.5, but it varies between insurers. So, if inflation (CPI) is 4%, your premium might increase by approximately 6% (4% x 1.5). The logic is that you are buying more cover at an older age than when you first took out the policy, and the risk of a claim increases with age.
Let’s look at a practical example. Sarah, a 35-year-old non-smoker, takes out a life insurance policy with a £300,000 sum assured for a monthly premium of £25. She opts for indexation linked to CPI.
Over many years, the difference becomes stark.
The table below illustrates the power of indexation over a 25-year policy term, assuming an average annual inflation rate of 3%.
| Year | Level Cover Payout | Real Value (at 3% inflation) | Indexed Cover Payout |
|---|---|---|---|
| 1 | £250,000 | £250,000 | £250,000 |
| 5 | £250,000 | £215,500 | £290,000 |
| 10 | £250,000 | £186,000 | £336,000 |
| 15 | £250,000 | £160,500 | £389,000 |
| 20 | £250,000 | £138,400 | £450,000 |
| 25 | £250,000 | £119,700 | £521,000 |
As you can see, after 25 years, the level cover policy has lost over half its purchasing power. The indexed policy, however, has maintained its real value, ensuring the financial support intended for your family is not diminished by time.
The inflation measure your policy is linked to has a direct impact on how much your cover and premiums increase each year. The two main indices used in the UK are the Retail Prices Index (RPI) and the Consumer Prices Index (CPI).
Historically, RPI has typically been higher than CPI. The government and regulators have been phasing out the use of RPI, and it is set to be fully aligned with CPIH from 2030.
For new life insurance policies today, the vast majority will offer indexation linked to CPI. If you have an older policy, it may be linked to RPI. It's crucial to check your policy documents to understand which measure is being used.
| Feature | Retail Prices Index (RPI) | Consumer Prices Index (CPI) |
|---|---|---|
| Main Use | Historically used for policies, some contracts | Official UK inflation measure, state benefits |
| Housing Costs | Includes mortgage interest, council tax | Excludes most owner-occupier housing costs |
| Typical Rate | Generally higher and more volatile | Generally lower and more stable |
| Current Status | Being phased out | Standard for most new policies |
Choosing indexation is a significant decision. It's essential to weigh the benefits against the potential drawbacks.
| Pros | Cons |
|---|---|
| Protects the real value of your payout | Premiums increase every year |
| Increases are automatic | Premiums rise faster than inflation |
| No new medical questions for increases | Can make long-term budgeting harder |
| Essential for very long-term policies | May become unaffordable in later years |
Indexation isn't necessary for everyone, but for certain individuals and situations, it is almost essential.
Indexation is not just for standard life insurance. It is an available and highly recommended feature on several other types of protection policies.
Critical Illness Cover: A critical illness diagnosis can bring significant unforeseen costs, from private medical treatments and home adaptations to specialist equipment. These costs will all rise with inflation. Indexing your critical illness cover ensures you have a lump sum that is sufficient to cover these expenses, whenever you might need to claim.
Income Protection: This is arguably where indexation is most important. Income Protection pays a regular monthly income if you're unable to work due to illness or injury.
Family Income Benefit: This type of policy pays out a regular, tax-free income rather than a lump sum. Indexing it ensures that the annual income your family receives doesn't shrink in real terms, allowing them to maintain their standard of living.
At WeCovr, our expert advisers can help you compare policies from across the market, explaining the specific indexation options available for life, critical illness, and income protection cover.
If you are concerned about the rising cost of index-linked premiums, there are other ways to manage your cover levels over time.
Level Cover: This is the simplest option. The sum assured and the premium are fixed for the entire policy term. It is cheaper and more predictable, but as we've seen, the real-terms value of the payout will decrease over time. It can be suitable for covering a fixed debt, like a repayment mortgage, where the amount you owe is also decreasing.
Guaranteed Insurability Options (GIOs): Many policies come with GIOs. These allow you to increase your sum assured without further medical underwriting at specific major life events, such as:
GIOs are a great feature, but they are reactive, not proactive. You have to remember to exercise the option, and the increases are capped at a certain amount. They don't provide the same automatic, inflation-matching protection as indexation.
Regular Manual Reviews: You could take out a level policy and commit to reviewing it every 3-5 years. If you feel you need more cover, you can apply for a new policy to top up your existing one. The major risk here is that your health may have changed, making new cover much more expensive or even unavailable.
| Feature | Indexation | Level Cover | Guaranteed Insurability Options |
|---|---|---|---|
| Sum Assured | Increases annually with inflation | Stays fixed | Can be increased at life events |
| Premiums | Increase annually | Stay fixed | Increase when you add cover |
| Medical Evidence | Not required for increases | N/A | Not required for increases |
| Main Benefit | Protects against inflation | Predictable and affordable | Flexible increases when needed |
| Main Drawback | Rising cost over time | Value erodes over time | Relies on you taking action |
For company directors and business owners, protecting the financial health of the business is paramount. Indexation plays a crucial role in ensuring business protection policies remain fit for purpose.
Key Person Insurance: This covers the financial loss a business would suffer if a key employee died or became critically ill. The cost of recruiting and training a replacement, along with the lost profits and disruption, will increase over time. Indexing the sum assured ensures the payout truly reflects the cost to the business when a claim is made.
Relevant Life Plans: These are tax-efficient, company-paid death-in-service policies for directors and employees. As an employee's salary and the general cost of living rise, a level benefit can quickly become inadequate. Indexing a Relevant Life Plan ensures the benefit paid to the employee's family remains a substantial and meaningful amount, reflecting their value to the business.
Executive Income Protection: If a director is unable to work long-term, this policy pays a replacement income via the business. Indexing this benefit is vital to ensure that the income replacement keeps up with personal and business inflation, protecting the director's financial stability throughout their absence.
Shareholder Protection: This provides funds for the remaining shareholders to buy out a deceased or critically ill shareholder's stake in the company. As a successful business grows, the value of its shares will increase. While standard CPI/RPI indexation might not keep pace with rapid business growth, it provides a crucial baseline of protection. This type of cover should be reviewed regularly alongside business valuations.
Deciding whether to add indexation to your policy depends on a careful assessment of your personal circumstances, long-term goals, and budget.
Ask yourself these key questions:
Choosing the right protection isn't just about getting the cheapest quote today; it's about securing a policy that will deliver on its promise when it matters most. At WeCovr, we specialise in helping our clients understand these nuances. We can provide detailed illustrations showing the projected future premiums and cover amounts for both level and indexed policies, allowing you to make a truly informed decision.
We believe in a holistic approach to your wellbeing. That's why, in addition to finding you the right protection, all WeCovr customers get complimentary access to our AI-powered calorie and nutrition tracker, CalorieHero, helping you stay on top of your health goals. A healthier life is not only more fulfilling but can also lead to lower insurance premiums.
Ultimately, indexation is a trade-off between a higher long-term cost and the certainty of a future-proofed payout. For most people taking out long-term protection, it's a price well worth paying for true peace of mind.






