Critical illness cover (CIC) for mortgage protection pays a tax-free lump sum on diagnosis of a defined serious illness. The lump sum can be used to repay your mortgage, clear unsecured debts, or replace lost income — your choice, no strings.
Why Life Insurance Alone Isn't Enough
Life insurance only pays out if you die. The unfortunate reality is most serious illnesses don't kill you immediately — modern cancer survival rates exceed 50%, and most heart attack patients survive too.
You survive. You're off work for 6–18 months. The mortgage still wants paying. Your income protection covers part of your salary but doesn't address the £180,000 mortgage hanging over your head.
That's the gap critical illness cover fills.
Calculating the Right Sum Assured
For mortgage and debt protection, a sensible starting point is:
- Outstanding mortgage balance
- + Credit card balances (often £5k–£15k)
- + Personal loans
- + Car finance
- + 6 months of household bills (£10k–£20k buffer)
For a typical UK home with a £200,000 mortgage and £15,000 of unsecured debt, you'd target around £225,000–£235,000 of cover. Use our calculators to model your mortgage balance.
Decreasing vs Level CIC
Like life insurance, CIC comes in two structures:
- Decreasing CIC — payout reduces over the term, matching your repayment mortgage. Cheapest option for pure mortgage clearance. See decreasing vs level term.
- Level CIC — payout stays fixed. Better if you also want to clear unsecured debts, fund treatment, or have an interest-only mortgage.
Most clients we set up choose level for the flexibility — the extra cost is typically £8–£15/month.
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What Conditions Are Covered?
Modern policies cover 50–100+ defined conditions. The big-money claim categories are:
- Cancer (around 60% of all claims)
- Heart attack
- Stroke
- Multiple sclerosis
- Major organ transplant
- Loss of limbs / blindness / deafness
- Parkinson's, Alzheimer's, motor neurone disease
Severity-based policies (e.g. Vitality, Royal London) also pay partial sums for less severe diagnoses — often 25%, 50% or 75% of the full sum. See our full conditions list.
Joint or Single Cover for Couples?
For homeowners, two single policies almost always beat one joint policy:
- Two single policies = two possible claims (one each)
- Joint policy = one claim only, then policy ends
- Cost difference is usually £5–£10/month — worth it
- Easier to keep one if you split up
Setting It Up
- Add up your mortgage + unsecured debts to set a target sum
- Choose level vs decreasing based on whether you want extra capital
- Decide on standalone CIC or combined life + CIC (combined is usually 15–20% cheaper)
- Have a specialist broker compare insurers — definitions and severity matter more than headline price
- Write in trust if also taking life cover, so payout is fast and IHT-free on death
Book a free protection review — we'll model exactly what your mortgage and debts need.
Frequently Asked Questions
- Can I use the lump sum however I want?
- Yes — completely. The policy pays you, not the lender. You can clear the mortgage, pay off debts, fund private treatment, take time off work — it's your money.
- Does the policy end after a claim?
- Usually yes for the full sum. Severity-based policies that pay partial amounts can continue until full sum is reached.
- What about pre-existing conditions?
- See our dedicated guide on <Link to='/blog/critical-illness-pre-existing-conditions'>critical illness with pre-existing conditions</Link> — most are insurable.
- Will my employer's death-in-service cover this?
- No. Death-in-service only pays on death — typically 4x salary, taxable above the lifetime allowance limit. It doesn't help if you survive a serious illness.
- Is critical illness cover tax-deductible?
- Personal policies aren't tax-deductible, but the payout is tax-free. Relevant Life Plans for company directors can be a tax-efficient route.
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