Decreasing term life insurance reduces the sum assured over time, roughly tracking a repayment mortgage. It is often cheaper — and sometimes too narrow.
When decreasing cover fits
If your only goal is clearing the outstanding loan on death, decreasing cover can match the balance schedule. Confirm the insurer’s decrease curve against your lender’s amortisation — they are not always identical.
When level cover is safer
Families still need living costs, childcare, and school fees after the mortgage is gone. Level cover (or a mix) leaves money for life after the loan. Overpayments or rate changes can also leave decreasing cover misaligned.
| Mortgage type | Often better fit |
|---|---|
| Repayment, stable | Decreasing or mix |
| Repayment + young children | Level or FIB + decreasing |
| Interest-only | Level cover |
| Nearly paid off | Review — maybe reduce |
Interest-only and offset quirks
Interest-only mortgages do not shrink the same way. Decreasing cover is usually the wrong shape; level cover sized to the full balance is the typical starting point.
Practical next steps
Treat this topic as a decision with paperwork attached. Write down the household facts that matter — who depends on income, which debts must clear, and which workplace benefits already exist — before you compare products. A clear brief stops glossy quotes from steering the plan.
When you speak to an insurer or adviser, ask for definitions and exclusions in writing, and keep PDFs of every illustration you rely on. Markets and underwriting change; your notes are the audit trail.
- Confirm what cover you already hold (personal and workplace).
- Size need against obligations, not round marketing numbers.
- Align wills, trusts, and nominations with the policy.
- Never cancel old cover until replacement is on risk.
Mistakes families make here
The common failure mode is optimising for the cheapest monthly figure while ignoring structure: joint versus single policies, accelerated versus additional benefits, and whether a trust exists at all. Another is letting group benefits create false confidence until a resignation removes them overnight.
Build a short annual review habit. An hour with schedules and nomination forms prevents most emergency weekends after a diagnosis or redundancy.
Revisit after remortgaging or large overpayments.
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