Is Mortgage-Only Life Insurance Enough? What Decreasing Term Cover Doesn't Protect
By Matthew Horan CeMAP, Head of Protection at Hug Life and Principal of Clarity Mortgages and Protection.
If you took out a mortgage and were offered just one protection policy, it was probably decreasing term life insurance. It pays off your mortgage if you die during the term — and nothing else.
That is a sensible starting point. It is usually the cheapest cover available and the simplest for a mortgage adviser to arrange alongside your application. But it only answers one question: what happens to the mortgage if I die?
It doesn't answer the questions most homeowners are far more likely to face. What if you're alive but can't work? What if a serious illness stops your income for a year? What if you're self-employed, you break your leg, and the money simply stops coming in — but the mortgage payment doesn't?
In this guide, I'll explain what decreasing term cover does well, where it leaves gaps, and how a modest increase in your monthly budget could protect you in the situations you're most likely to need it.
What is decreasing term life insurance?
Decreasing term life insurance is designed to match a repayment mortgage. As you pay your mortgage down, the amount of cover reduces roughly in line with it. If you die during the policy term, it pays out a lump sum intended to clear the remaining balance.
Because the payout shrinks over time, premiums are typically lower than for level term cover, where the sum assured stays the same throughout.
Where it works well:
It's affordable, which matters when you've just stretched to buy a home
It's simple — one job, clearly defined
It means your family wouldn't have to sell the house or take on the mortgage if you died
There is absolutely a place for it. If your budget is genuinely tight, mortgage-only cover is far better than no cover at all. The issue is when it's treated as the whole answer rather than the first step.
The gaps: what mortgage-only cover doesn't protect
Decreasing term cover only pays out on death. But your mortgage depends on your income — and there are plenty of ways to lose your income without dying. Here are three real-world scenarios we see regularly.
1. You can't work due to illness or injury
A bad back, a mental health condition, a long recovery from surgery. None of these would trigger a life insurance claim, but any of them could stop you working for months.
If you're employed, your sick pay may run out sooner than you think — many employers only pay Statutory Sick Pay, which is £123.25 a week in the 2026/27 tax year and unlikely to cover a mortgage payment on its own. Your lender will still expect payment every month.
What could help: Income protection, which pays a monthly benefit (usually a percentage of your income) if you can't work due to illness or injury, until you return to work or the policy ends.
2. You're diagnosed with a critical illness
Cancer, heart attack and stroke are among the most common reasons people claim on protection policies. Thanks to medical advances, many people survive these illnesses — but treatment and recovery can mean a long time off work, plus extra costs for adapting your home, travel to appointments or a partner reducing their hours to care for you.
Your decreasing term policy would pay nothing, because you're still alive.
What could help: Critical illness cover, which pays a tax-free lump sum on diagnosis of a specified serious illness. That money could clear or reduce the mortgage, or give you breathing space while you recover. It can often be added to your life policy.
3. You're self-employed and work with your hands
This is the scenario that worries me most. Think of a self-employed plasterer, electrician, builder or mechanic. They break a leg, or injure a wrist. It's not life-threatening and it's not a critical illness — but they physically cannot do their job for six to twelve weeks.
There's no employer sick pay and no Statutory Sick Pay for the self-employed. The income stops immediately. The mortgage payment doesn't.
What could help: Income protection with a short deferred period (the time before payments start), or accident, sickness and unemployment-style cover designed for shorter-term absences. Some policies are built specifically for manual and trade occupations and pay out on a day-one or week-one basis, depending on the plan.
Mortgage-only cover vs a wider protection plan
| Scenario | Decreasing term life only | Life + critical illness | Life + income protection |
|---|---|---|---|
| You die during the mortgage term | Mortgage cleared | Mortgage cleared | Mortgage cleared |
| Diagnosed with cancer, heart attack or stroke | Nothing paid | Lump sum paid on diagnosis | Monthly income if you can't work |
| Off work for months with illness or a bad back | Nothing paid | Only if a listed critical illness | Monthly income after deferred period |
| Self-employed tradesperson breaks a leg | Nothing paid | Nothing paid | Monthly income after deferred period |
| Mental health condition stops you working | Nothing paid | Usually nothing paid | Monthly income after deferred period |
Exact cover depends on the policy, insurer and terms. This table is a general illustration, not a guarantee of what any specific policy will pay.
A small increase in budget, a big difference in protection
Most people assume wider protection is expensive. In reality, a modest increase on top of a mortgage-only policy can open up a lot more options — and a good adviser will tailor them to what you can afford.
Some of the ways we keep costs manageable:
Adjusting the deferred period on income protection to match your sick pay or savings, so you're not paying for cover you don't need
Covering part of the mortgage with critical illness rather than the full balance
Choosing shorter-term income protection that pays for one or two years per claim, rather than until retirement
Combining policies with one insurer where it offers better value
Reviewing what you already have through work, so you don't double up
The aim isn't to sell you every product. It's to make sure the cover you pay for actually matches the risks you face. For a self-employed tradesperson, that might be income protection first. For a family with young children, it might be critical illness alongside life cover.
Your mortgage is likely the biggest financial commitment you'll ever make. Protecting it against just one outcome leaves a lot to chance.
Frequently asked questions
Is decreasing term life insurance a bad policy?
No. It's a cost-effective way to make sure your mortgage is repaid if you die. The risk is relying on it alone, because it doesn't pay out if you're ill or injured and still alive.
Is critical illness cover the same as income protection?
No. Critical illness cover pays a one-off lump sum if you're diagnosed with a specified serious illness. Income protection pays a monthly amount if any illness or injury stops you working, subject to the policy terms.
I'm self-employed — can I still get income protection?
Yes. Self-employed people are often the ones who need it most, as there's no employer sick pay to fall back on. Your premium will depend on your occupation, age, health and the deferred period you choose.
Can I add cover to the policy my mortgage adviser set up?
Often you can take out an additional policy alongside your existing one. In some cases it may be better value to review and restructure your cover. An adviser can compare both options for you.
Does it cost anything to speak to us?
No. We don't charge a fee for our advice.
If your only cover is the policy set up with your mortgage, it's worth checking what would happen if you couldn't work. Our free Protection Gap Assessment shows where you might be exposed — no obligation, no fee.
About the author
Matthew Horan CeMAP is Head of Protection at Hug Life and Principal of Clarity Mortgages and Protection, with over 10 years' experience helping individuals, families and business owners protect their income, homes and businesses. He specialises in making protection simple and affordable, and in finding cover that fits real lives rather than off-the-shelf assumptions.
