The short answer: Underwriting is how an insurer assesses your health and lifestyle to decide whether to offer you cover, and on what terms. If you have a pre-existing medical condition, underwriting usually leads to one of five outcomes; standard terms, a higher premium, an exclusion for the related condition, a postponed decision, or a decline. A condition rarely makes you uninsurable, it more often changes the price or the terms, and the outcome can differ widely from one insurer to the next.
For people living with a medical condition, understanding underwriting is the single most useful thing you can do before applying. It explains why two insurers can quote completely different prices for the same person, and why how an application is presented matters as much as the condition itself.
What is underwriting in protection insurance?
Underwriting is the risk assessment process an insurer uses to price your policy. When you apply for life insurance, critical illness cover or income protection, you answer questions about your health, family medical history, occupation, lifestyle or any hobbies. The underwriter considers that information and decides whether to offer cover, how much to charge, and whether to add any conditions.
For someone in good health with no medical history, this is often automatic and instant. For someone with a pre-existing condition, the process can involve more detail, and that is where the right guidance makes a real difference.
How does underwriting work when you have a pre-existing condition?
The process generally follows these stages:
- You disclose your medical history – This is done through health questions on the application, and you have a legal duty to answer them honestly and carefully (more on that below).
- The underwriter assesses the risk – They look at the type and severity of your condition, how recently it was diagnosed, how well it’s controlled, your current treatment, and whether it’s stable, improving or worsening.
- They may request further evidence – Depending on the condition, this can include a report from your GP, access to a summary of your medical records, or a short telephone health interview or nurse screening.
- They reach a decision – This is communicated as one of the five outcomes below.
The same condition can be viewed very differently by different insurers, because each one sets its own underwriting rules. One provider might decline an application that another accepts at a competitive rate, which is exactly why comparing insurers is so important.
The five possible underwriting outcomes
| Outcome | What it means | When it tends to happen |
| Standard terms | You pay the same premium as someone without the condition. | Mild, well-controlled or historic conditions that pose little extra risk. |
| Rated terms (a “loading”) | Cover is offered, but at a higher premium to reflect the added risk. | The most common outcome. A loading might add anywhere from around +25% to +200% or more, depending on the condition. |
| An exclusion | You’re covered, but claims relating to your specific condition (and closely related conditions) are excluded. | More common on critical illness cover and income protection. |
| Postponement (deferral) | The insurer delays its decision, often by 6–24 months, until your health is more stable. | Recent diagnoses, ongoing treatment, surgery, or an unstable condition. |
| Decline | The insurer is unable to offer cover. | Severe, complex or very recent conditions. A decline from one insurer does not mean every insurer will say no. |
A few important points about these outcomes:
- A loading means you pay more, but you remain fully covered for all causes, including your pre-existing condition.
- An exclusion keeps the premium lower but means that one specific area won’t be covered, so you need to weigh price against protection.
- A decline does not appear on your credit file, and there’s no single public “blacklist” of declined applicants. However, many application forms ask whether you’ve previously been declined, loaded or excluded, and you must answer honestly.
Common examples by condition
These are illustrative of how underwriting typically responds, your own outcome depends on your full medical picture and the insurer.
- Type 2 diabetes (well controlled): Often a premium loading rather than a decline. Good control, stable HbA1c readings and no complications usually mean more favourable terms.
- History of cancer (in remission): Outcomes depend heavily on the type, stage, and how long ago treatment finished. Some insurers apply a temporary “per mille” loading (an extra cost per £1,000 of cover for a set number of years); others may postpone until you’ve been clear for longer.
- Mental health conditions: Mild, well-managed anxiety or depression is frequently accepted on standard or lightly loaded terms. More significant or recurrent histories may attract a loading or, on income protection, an exclusion.
- High BMI: Often results in a loading. A very high BMI, particularly alongside high blood pressure or diabetes, can lead to postponement or decline with some insurers.
- Heart conditions: Treated more cautiously, with the outcome shaped by the specific diagnosis, treatment, and how stable things have been since.
How underwriting differs across product types
The same condition can be assessed differently depending on which type of cover you apply for.
- Life insurance pays out on death (or terminal illness). Underwriting focuses on anything affecting life expectancy, so a loading is the most common adjustment.
- Critical illness cover pays a lump sum if you’re diagnosed with a defined serious illness. Because the condition itself can be the thing you claim for, exclusions are more common here.
- Income protection replaces part of your income if illness or injury stops you working. Underwriters often apply an exclusion for claims related to your specific condition, while still covering you for everything else.
Because of these differences, an applicant might secure life cover easily but face an exclusion on income protection, which is worth knowing before you decide which policies to prioritise.
Why honest disclosure matters
Under the Consumer Insurance (Disclosure and Representations) Act 2012, you have a duty to take reasonable care to not make a misrepresentation when you apply. In plain terms; answer the questions fully and accurately.
This matters because a protection policy is paid out at claim time, often years after you applied. If an insurer later discovers a relevant condition that wasn’t disclosed, it may reduce the payout, refuse the claim, or void the policy entirely. That’s the worst possible outcome: paying premiums for years and finding the cover doesn’t respond when your family needs it.
It is always better to disclose a borderline condition and accept a small loading or exclusion than to leave it off and risk the whole policy. Underwriters aren’t looking for reasons to refuse you, they’re trying to price the risk accurately.
What you can do to improve your chances
- Disclose everything clearly and accurately. Full, well presented information helps an underwriter assess you fairly rather than cautiously.
- Gather the supporting details. Knowing your diagnosis date, current medication, recent test results and treatment history helps your application move smoothly.
- Don’t blindly apply to lots of insurers. Each application is a separate assessment, and scattering applications can work against you. A targeted approach is far more effective.
- Get indicative terms first. A specialist broker can approach underwriters anonymously to gauge the likely outcome before a formal application, which avoids unnecessary declines on your record.
- Improve what you can. For some conditions, high BMI being the clearest example, positive changes before applying can meaningfully reduce a loading.
- Consider specialist insurers. Some UK providers, such as The Insurance Surgery, specialise in “impaired life” cases and have underwriting teams used to assess complex or multiple conditions. They’re often more flexible where mainstream brands are cautious.
Why a broker helps with medical underwriting
When you have a pre-existing condition, the difference between insurers can be enormous, and you can’t see those differences from a price comparison site alone. A broker works for you, not the insurer.
A specialist broker knows which insurers are more sympathetic to which conditions, which exclusions to watch for, and how to present your application so it stands the best chance of acceptance at a fair price. For complex cases, they can broke the application across both specialist and mainstream insurers, then compare the actual offers, both price and exclusions, so you can choose one that genuinely fits your situation.
Being declined once does not mean you’re uninsurable. In fact, it’s a common starting point for people who go on to secure good cover with the right guidance.
Frequently Asked Questions
Can I get life insurance with a pre-existing medical condition?
In most cases, yes. A pre-existing condition usually changes the price or terms of cover rather than ruling it out altogether. The outcome depends on the condition, how well it’s controlled, and which insurer you apply to.
What is a premium loading?
A loading is an increase to your standard premium that reflects the additional risk. You pay more, but you remain fully covered for all causes, including your condition.
What’s the difference between a loading and an exclusion?
A loading means a higher price with full cover. An exclusion means a lower price but no cover for claims relating to your specific condition. Loadings are more common on life insurance; exclusions are more common on critical illness and income protection.
Does a declined application affect my credit score or go on a permanent record?
No. A decline doesn’t appear on your credit file, and there’s no single public register of declined applicants. However, many applications ask whether you’ve previously been declined, loaded or excluded, and you must answer honestly.
Why do insurers quote such different prices for the same condition?
Because each insurer sets its own underwriting rules and risk appetite. One provider may load or decline a case that another accepts on competitive terms, which is why comparing insurers, ideally through a specialist broker, matters so much.
Should I disclose a minor condition?
Yes. You have a legal duty to take reasonable care not to make a misrepresentation. Disclosing fully protects your policy and your family’s claim. A small loading or exclusion is far better than a refused claim later.
The Insurance Surgery is an award-winning, FCA-regulated life and protection insurance broker specialising in cover for people with medical conditions and high-risk occupations. For free, impartial advice on protection insurance for pre-existing medical conditions, speak to a specialist adviser on 0800 083 2829.
This guide is for general information and is not personal financial advice.
