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Having a pre-existing condition isn't necessarily a barrier to buying life insurance. You can still access level term, decreasing term, increasing term or whole-of-life cover.
The main issue for many customers is usually price. Insurers may consider you high risk, which could mean your premium is more expensive, and they may require a medical exam before covering you.
Providers will also usually push up costs for policyholders with a history of smoking or vaping, even though they don't count as pre-existing conditions.
Here, we focus on two common pre-existing conditions that can affect life cover: cancer and diabetes. We also explain what to do if you're a smoker.
Whether someone already diagnosed with cancer can get life insurance depends on their specific circumstances, including the severity, treatment and prognosis provided by the doctors treating them.
Life insurers cover the risk of you dying during the term of the policy. If the medical prognosis is that you will die in that time, then there's no longer a risk, only a certainty. Insurers can't cover certainties, so they're legally entitled to refuse you cover in those circumstances.
People who have recovered from cancer may be asked to provide detailed medical information and attend a medical examination before taking out a new policy. You may also have higher premiums and restrictions on the maximum sum insured.
While there are some specialist, non-medically screened policies that offer guaranteed cover for anyone, these are often more expensive. The term length or the total sum insured may also be limited.
If you already have an existing policy, however, there’s often no need to tell your life insurer if you develop cancer. Once a policy is in place, the premiums can't be increased. And, as long as you make full and honest disclosures on your application and continue paying the premiums, the policy can't be cancelled.
Life insurance usually pays out only when you die. So if you're diagnosed with cancer, your policy won’t automatically pay you anything.
If you want cover that pays out while you're still alive, consider taking out critical illness cover. This is separate from life insurance. It pays you a lump sum if you're diagnosed with a serious illness, including many types of cancer. You can use this money to pay your mortgage, cover bills or pay for treatment. Our guide to critical illness cover explains more.
Many life insurance policies also include terminal illness benefit. This means the policy could pay out early if a doctor says you have less than 12 months to live. This is different from critical illness cover, and not all policies include it, so it’s worth checking your documents or asking your insurer.

Find the right life insurance policy using the service provided by LifeSearch.
Get a quotePeople with diabetes are more likely to die at an early age, which makes getting life insurance more of a challenge. You should seek professional advice, and you will likely need to buy a policy from a specialist provider. Also, it may take longer and require more information from your doctor, or even a medical examination, so make sure you apply in plenty of time.
You’ll also face higher premiums because of the increased risk of premature death, but the price will depend on the severity of your condition, how you're responding to treatment and your doctor’s prognosis for your future. Some life insurers know that many people with diabetes live long and fulfilling lives, so they will quote competitively.
When applying for a new life insurance policy, you will need to provide full details of when you were first diagnosed with diabetes, your medical history plus the specifics of your treatment and medication.
You must tell the insurer:
You can also explain significant lifestyle changes you've made, such as losing weight. That can help to lower your premiums.
If you already have life insurance and are subsequently diagnosed with diabetes, you don't have to tell your insurer or pay higher premiums.
People with diabetes can buy most forms of life insurance. The two main types are level term and decreasing term.
It's possible to get both these policies on your own or in joint names, either paying out when the first person dies (joint life insurance) or once both have died (called either dual life insurance or joint second-death life insurance).
It should be possible to get lump-sum policies and family income policies, in which a monthly payment is made to replace the deceased's income.
Although it may also be possible to get whole-of-life cover – which guarantees to pay out at whatever age the insured person dies – the price may be prohibitive.
Diabetes is not considered a critical illness, as treatment and condition management mean many people with diabetes live long and fulfilling lives. As a result, critical illness insurance doesn't typically cover it.
That doesn't mean you will denied cover outright. It all depends on the individual and the type of diabetes you're diagnosed with.
People with Type 2 diabetes, particularly if it’s well controlled, will often be able to get cover – though typically with higher premiums, and sometimes with exclusions. People with Type 1 diabetes can also get cover, but the policy may come with extra restrictions.
Some people with cancer or diabetes can buy life insurance like everyone else. Many providers, such as Aviva, Legal & General and Vitality, offer it directly from their websites.
You can also get life insurance from most price comparison websites, such as MoneySuperMarket, Compare the Market and Uswitch.
To find out what your options are, you can use an independent financial adviser. They might already be providing you with other financial advice and products, such as savings, pensions and mortgages.
Or you can turn to a specialist life insurance broker such as LifeSearch, which focuses exclusively on this product and has direct contact with underwriters. It will know which insurers are more favourable towards people who have had cancer.
The more severe or complex your cancer or diabetes, the more likely a specialist will be best placed to help.
Smokers and vapers can still buy life insurance. But because it increases the risk of dying early, the habit will push up the price of premiums.
You must tell your life insurer if you smoke or vape using nicotine products, even if you do so only occasionally. You will be asked to detail how much and how often you smoke. This will be verified when requesting medical information from your GP.
If you lie about your smoking and get a cheaper premium as a result, you will have committed fraud. If your family later needs to claim, your policy may be declared void, and any payout refused.
Note that insurers weight premiums for people who use vapes, gum and patches the same as for those who smoke cigarettes.
In most cases, life insurance costs significantly more if you smoke.
To show how much more, we went to Legal & General’s website on 19 May 2026 and ran a quote for a 35-year-old applying for £300,000 of level-term life insurance over 34 years.
| Status | Monthly premium | Total cost over 34 years | How to take out a policy |
|---|---|---|---|
| Non-smoker | £17.78 | £7,254.24 | Visit LifeSearch |
| Smoker | £31.97 | £13,043.76 | Visit LifeSearch |
In this scenario, a smoker would pay almost double the monthly premiums of a non-smoker and almost £6,000 more over the life of the policy.
It's possible to get cheaper life insurance if you quit smoking, either by applying for a new policy or amending your existing insurance.
Some insurers only require you to have quit for a year (others for two, five or even 10 years).
A few insurers enable you to sign a declaration that you have given up smoking after this period, and will reduce your premiums. However, most insurers won’t discount an existing policy.
Instead, you can get quotes again as a non-smoker to see whether the premiums are lower for the same policies.
However, if you gave up smoking 10 years into a 25-year life insurance term, by the time you applied for new life insurance you would be 10 years older, and age is a significant factor in raising premiums.
You may also have developed other medical conditions, such as high blood pressure, weight problems or heart disease. These added factors may make a new non-smoking policy more expensive than sticking with your existing cover.

Matthew Jenkin, insurance expert, says: 'Insurers will request a medical report from your doctor. It's best to opt to see this first, because in some practices, the person completing these forms may not be the GP treating you and may have missed something important.
'Make sure your GP’s medical report is accurate before it's sent to the insurer. Correcting errors afterwards can take months or years and may require you to complain to the Financial Ombudsman Service about the insurer. In the meantime, you will have paid over the odds in higher premiums.
'Full transparency is the best policy. In complex cases, you may be required to have a medical examination. These days, insurers will often send a specialist nurse to your home for this.'
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