Life Insurance vs Critical Illness Cover: Do You Need Both?
Life insurance and critical illness cover protect against different financial risks.
Life insurance is primarily designed to protect the people who depend on you if you die during the policy term. Critical illness cover is designed to provide money to you if you are diagnosed with a serious condition that meets the policy definition.
You can buy them separately or, with some insurers, combine them within the same protection arrangement.
The important question is not simply whether one is “better”. It is which financial problems would arise if you died, became seriously ill, or both at different points in your life.
What does life insurance cover?
Life insurance normally pays a lump sum if the person insured dies during the policy term, subject to the policy conditions.
Some policies also include a terminal illness benefit, although the definition and conditions vary between insurers.
The money could help your family:
- repay or reduce a mortgage;
- replace income that is no longer coming into the household;
- meet everyday living costs;
- support children or other dependants; or
- maintain greater financial stability after your death.
For personally owned policies, the death benefit is not normally treated as taxable income when it is paid to the beneficiary. However, inheritance-tax considerations can depend on the ownership of the policy and how the benefit is paid.
Read our Life Insurance Explained guides
What does critical illness cover do?
Critical illness cover can pay a lump sum if you are diagnosed with a condition included in the policy and the diagnosis meets the insurer's definition.
Common areas of cover can include conditions such as:
- cancer of specified severity;
- heart attack of specified severity;
- stroke of specified severity;
- multiple sclerosis;
- specified neurological conditions; and
- certain major operations or organ failure.
The exact list differs between policies.
A diagnosis does not automatically mean a claim will be paid. The medical condition normally needs to satisfy the wording and severity criteria set out in the policy.
The payment is made while you are alive and can generally be used as you choose.
That could mean reducing the mortgage, covering household bills, paying for adaptations or simply creating financial breathing space during treatment and recovery.
Learn what critical illness policies can cover
What is the main difference?
The simplest distinction is:
Life insurance protects against the financial consequences of your death.
Critical illness cover protects against the financial consequences of certain serious diagnoses while you are alive.
But there is an important extra point. Critical illness insurance is not the same as cover for being unable to work.
You could be unable to work because of an illness that does not meet a critical illness definition. That is one reason income protection is a separate type of insurance.
What happens if you only have life insurance?
Suppose you survive a serious illness but cannot work for several months.
Ordinary life insurance would not normally pay simply because you had become ill.
You could therefore still have:
- mortgage payments;
- household expenses;
- childcare costs;
- debts; and
- a reduced income.
Your savings, employer sick pay or other insurance might be enough to manage that situation. If they are not, there could be a protection gap.
What happens if you only have critical illness cover?
Critical illness insurance is also not a substitute for life insurance. If you die without first having a qualifying critical illness claim, a standalone critical illness policy would not normally provide the death benefit that life insurance is designed to provide.
That could leave your partner or family dealing with the loss of your income alongside the mortgage and other household commitments. So the two products solve different problems.
When might having both make sense?
Having both can be worth considering where death and serious illness could each cause significant financial damage.
For example, that may be relevant if:
- you have a mortgage;
- you have children or other dependants;
- your household relies heavily on your income;
- your savings would not last long after a major financial shock;
- your employer provides limited sick pay; or
- you are self-employed.
That does not mean everyone needs both. The amount and type of protection should reflect the risks your household would struggle to absorb.
When might life insurance be the priority?
Life insurance may be the more immediate priority if your biggest concern is what would happen to other people financially if you died.
That could apply if:
- you have children;
- your partner relies on your income;
- you have a substantial mortgage;
- you want to leave enough money to clear debts; or
- your budget means you cannot insure every risk at once.
Life insurance can also be less expensive than adding substantial critical illness protection, although premiums depend on factors such as age, health, smoking status, term and cover amount.
When might critical illness cover be particularly important?
Critical illness cover may deserve greater consideration where surviving a serious illness would create a substantial financial problem.
For example:
- you have a mortgage on your own;
- you have little long-term sick pay;
- you are self-employed;
- you have limited savings;
- you would want money available to reduce your mortgage; or
- you would struggle to maintain household costs during a long recovery.
The important distinction is that the claim depends on the medical definition, not simply whether the illness stops you working.
Do you need the same amount of each?
Not necessarily. Protection does not have to be an all-or-nothing decision. Someone might choose enough life insurance to repay the entire mortgage but a smaller amount of critical illness cover designed to reduce the loan and provide a financial buffer. Another household might need a larger critical illness amount because it has limited savings and weak employer benefits.
Think about the job each policy needs to do rather than automatically choosing identical sums.
For life insurance, you might consider:
- mortgage debt;
- family income needs;
- childcare;
- other debts; and
- how long dependants may require support.
For critical illness cover, you might consider:
- how much of the mortgage you would want to reduce;
- lost earnings;
- sick pay;
- savings;
- household expenditure; and
- additional costs that could arise during illness.
Can life insurance and critical illness cover be combined?
Yes. Some insurers allow critical illness cover to be added to a life insurance policy. That can make the arrangement simpler, but it is important to understand how claims work. Some combined arrangements may pay following the first qualifying event and then reduce or end some or all of the remaining cover.
Others may be structured differently.
Before choosing a combined policy, check:
- what conditions are covered;
- whether partial payments are available;
- what happens to the life cover after a critical illness claim;
- whether the cover amounts are the same;
- whether the cover is level or decreasing; and
- whether the policy can be changed later.
Read more about combining life and critical illness cover
What about income protection?
Income protection is worth considering separately because it addresses another risk.
Critical illness cover generally pays because you have experienced a qualifying diagnosis.
Income protection is designed to provide a regular income when illness or injury prevents you from working, subject to the policy terms.
You could therefore have:
- a condition that qualifies for critical illness cover but does not prevent you from working permanently;
- an illness that prevents you from working but does not qualify for a critical illness payment; or
- circumstances where both forms of protection could be relevant.
That is why simply asking “life insurance or critical illness?” can sometimes be too narrow.
A simple example
Imagine a couple with children and a £250,000 mortgage.
One parent's income is important to meeting the mortgage and household bills. If that parent dies, life insurance could provide money for the surviving family to reduce or repay the mortgage and replace some of the lost financial support.
If the same parent instead survives a serious illness that meets the critical illness definition, critical illness cover could provide money while they are still alive to reduce the mortgage or deal with the financial impact of treatment and recovery. The household is exposed to two different financial risks. Having both forms of cover can address both — but the amount of each should still be based on the family's actual needs and budget.
Common mistakes when comparing the two
One mistake is assuming critical illness insurance replaces life insurance. It does not.
Another is assuming life insurance will help simply because you become seriously ill. Ordinary life cover generally will not. It is also easy to focus on buying the maximum possible critical illness amount without considering affordability. A policy only provides long-term protection if you can continue paying the premium. Finally, do not assume employer sick pay or workplace benefits provide more protection than they actually do. Check the amount, duration and conditions of any benefits you already have.
Which should you choose?
Start with the financial consequence rather than the product.
Ask:
If I died, who would lose money or struggle financially?
Then ask:
If I survived a serious illness, what would happen to my income, mortgage and household costs?
If the first scenario creates the biggest risk, life insurance may deserve priority. If the second creates a serious financial problem too, critical illness cover may be worth adding. And if being unable to work is the main concern regardless of the diagnosis, income protection should also be considered.
The bottom line
Life insurance and critical illness cover are related, but they do different jobs.
Life insurance can protect the people who depend on you if you die.
Critical illness cover can provide money to you if you survive a serious illness that meets the policy definition.
You do not automatically need both.
But if either death or serious illness would seriously damage your household finances, it is worth considering whether your existing savings, workplace benefits and insurance are enough to deal with both risks.
