Income protection and critical illness cover sound similar, but they pay out on completely different triggers and at completely different times. Most UK families with dependants need at least one; many need both. This guide shows how to decide.
Side-by-side comparison
| Feature | Income Protection | Critical Illness Cover |
|---|---|---|
| Payout type | Monthly income | Lump sum |
| Trigger | Unable to work due to any illness / injury | Diagnosis of a listed condition |
| Typical benefit | 50–70% of gross income | Chosen sum — typically 1–2× annual salary or mortgage balance |
| Payout duration | Until you return to work, retirement, or policy end | One-time lump sum |
| Typical cost (age 35, healthy) | £18–35/month | £20–40/month for £100k cover |
| Conditions covered | Any — even conditions not listed in any illness schedule | Listed conditions only (typically 30–60 named illnesses) |
| Claim likelihood (pre-65) | Higher — covers back pain, mental health, any long-term sickness | Lower — requires named serious diagnosis |
| Deferred period | 4/8/13/26/52 weeks before payments start | Payable on confirmed diagnosis (typically 14–28 days) |
Scenario: you're diagnosed with cancer at 42
- Critical illness cover: pays your lump sum (£100k–£200k) within 4–6 weeks of diagnosis confirmation. You use it to clear the mortgage, fund private treatment, or bridge income.
- Income protection: begins paying monthly income after your chosen deferred period (e.g. 13 weeks). Continues as long as you're unable to work, even if that's years. Stops when you return to work or reach the policy end age.
- Both together: lump sum at diagnosis deals with one-off costs; monthly income protects household bills for the duration. This combination is what most advisers recommend.
Scenario: you slip a disc at 38 and can't work for 9 months
- Critical illness cover: no payout. Spinal injury isn't a named condition on most CIC schedules unless it meets the severity threshold (typically paralysis).
- Income protection: pays 50–70% of your income from the end of your deferred period until you're back at work. This is exactly what IP is designed for.
Scenario: you develop long-term depression
- Critical illness cover: no payout. Mental health is not on CIC schedules.
- Income protection: pays monthly benefit while the condition keeps you off work, subject to meeting the policy's inability-to-work criteria.
So which do I need?
Most UK adults with a mortgage and dependants should have income protection as a minimum.
It covers the broadest range of claim events — any long-term illness or injury — and it's the one type of cover that's hardest to self-insure against.
Critical illness cover is most valuable as an addition to income protection.
It provides a lump sum on top of your monthly IP benefit — useful for clearing debts, funding treatment, or making major life adjustments following a diagnosis. On its own, CIC has a significant coverage gap: back pain, mental health, neurological conditions and many autoimmune illnesses aren't covered by most CIC policies.
If you can only afford one, pick income protection.
More comprehensive trigger, higher probability of claim between ages 30 and 60.
If you can afford both, a combined policy is usually cheaper than two separate policies.
Most insurers (LV=, Aviva, Royal London, Vitality) offer combined life + CIC + IP with a discount.
Cost of both together — real UK pricing
For a healthy 35-year-old, non-smoker, £30,000 income, £250k mortgage:
- Income protection (65% benefit, 13-week deferred, age 68): £22/month
- Critical illness (£100k decreasing 25-year term): £18/month
- Both together (combined policy): £36–40/month (vs £40 bought separately)
Tax treatment
- Income protection payouts are tax-free when the policy is held personally.
- Critical illness payouts are tax-free when the policy is held personally.
- Group income protection / group CIC (employer-provided) is typically paid gross and taxed as earnings in the UK.
- Executive income protection (for directors / contractors via limited company) is tax-deductible for the company and typically not a benefit in kind — a valuable structure for self-employed directors.
Decision tree for UK families
- Do you have dependants? → Yes: keep reading. No: life insurance / savings are usually sufficient.
- Do you have more than 6 months of essential-expense savings? → Yes: consider a longer IP deferred period or skip CIC. No: keep reading.
- Does your employer provide comprehensive sick pay + CIC? → Yes: you may only need personal top-up. No: keep reading.
- Can you afford both IP and CIC? → Yes: get a combined policy. No: get IP first, add CIC when your budget permits.
Frequently Asked Questions
Ideally yes, if your budget allows. They cover different risks: critical illness pays a lump sum on diagnosis of one of the listed conditions, income protection pays a monthly income for as long as you're unable to work due to any illness. Together they give you both a cash cushion for one-off costs and ongoing income replacement.
Income protection is usually more important for most UK working adults. It covers a broader range of claim events (back pain, mental health, any long-term illness) and pays monthly income for as long as you can't work. Critical illness cover has narrower triggers — it only pays on diagnosis of specific listed conditions.
For the same level of financial protection, they're usually similar in cost. A £100,000 critical illness policy at age 35 costs around £18/month; a typical income protection policy protecting £20,000/year of income costs £18–25/month. Combined policies are usually cheaper than buying both separately.
Yes, when the policy is held personally — payouts are income-tax-free. Group income protection (employer-provided) is taxed as earnings. Executive income protection (policy held by a limited company for a director) has specific tax treatment — worth specialist advice.
Varies by insurer but typically 30–60 named conditions: cancer, heart attack, stroke, multiple sclerosis, Parkinson's, major organ transplant, kidney failure, motor neurone disease, dementia (over-55). Compare each insurer's definitions — 'severe' vs 'early stage' vs 'partial payout' wording materially affects which claims pay.
Yes. Most major UK insurers (LV=, Aviva, Royal London, Vitality, Guardian) offer combined policies. The advantage is a bundled discount, single underwriting, one monthly payment. The disadvantage is less flexibility if your needs change — unbundling a combined policy means starting again.