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    Life insurance

    Level vs decreasing term life insurance: what’s the difference?

    Written by Ilana Eldad, Corporate PMI Specialist, PremierPMI
    Reviewed by Muhammad Junaid, Digital Marketing Executive, PremierPMI

    Published 15 September 2026 · Last reviewed 15 September 2026 · Next review 15 December 2026 · 4 min read

    The short answer

    Both are term policies, but a level term sum assured stays fixed for the whole term, while a decreasing term sum falls over the years, broadly tracking a repayment mortgage balance. Because the insurer’s potential liability shrinks each year, decreasing term costs less for the same starting figure.

    PremierPMI is an insurance broker, authorised and regulated by the FCA (FRN 1029667). We may receive commission if you take out a policy. How we are funded.

    In this guide2 sections

    What to know about the difference between level and decreasing term cover

    1. Level term pays the same sum throughout the term, suiting needs that do not shrink over time. Read more
    2. Decreasing term’s sum assured falls on a set schedule, broadly shadowing a repayment mortgage balance. Read more
    3. The insurer’s shrinking liability each year is why decreasing term costs less than level cover. Read more
    4. A policy’s assumed decrease rate may not match your actual mortgage rate, leaving a cover gap. Read more

    Thinking about the difference between level and decreasing term cover

    What works well

    • Decreasing term matches a repayment mortgage cheaply.
    • Level term suits needs that do not shrink, like family income.
    • The structure choice is visible in the illustration before you buy.

    What to watch

    • The decrease rate may not match your actual mortgage rate.
    • Decreasing cover leaves nothing over once the mortgage is cleared.
    • A level sum loses real value to inflation over long terms.

    A fixed promise versus a shrinking one

    A level term policy promises the same sum in year one as in the final year, which suits obligations that do not shrink: family income, childcare costs, an interest-only mortgage. A decreasing term policy promises a sum that falls on a set schedule, designed to shadow a repayment mortgage as monthly payments erode the balance.[2][3] The design assumption matters: the policy’s decrease rate assumes a mortgage interest rate, and if your actual mortgage rate runs higher, the cover can fall faster than the debt — a gap worth checking on the policy illustration.[2] For anything other than a repayment mortgage, level cover is usually the honest structure, because most family needs do not shrink on a schedule. Inflation also works on a level sum over a long term, which is why some policies offer an increasing or index-linked option at higher cost. The assumed decrease rate appears on the insurer’s own policy illustration, not in any published market table.

    If the cover is for a repayment mortgage, ask for the policy’s assumed decrease rate and compare it with your actual mortgage rate before buying. The FCA’s conduct rules require the seller to give you appropriate information about the policy before you buy, so ask for the illustration then.[1] Whatever the specifics of the difference between level and decreasing term cover, the discipline that protects your family is always the same: get the insurer’s position in writing, keep the documents with the policy, and make sure the people who would claim know the policy exists and where the paperwork lives.

    Related guides

    Looking at cover with PremierPMI

    PremierPMI is a specialist private medical insurance broker and the publisher of The Health Guide. If you want to talk through what this means for your own cover, you can start there.

    Or, if you would rather start here, send an enquiry and PremierPMI will contact you.

    PremierPMI is an insurance broker, authorised and regulated by the FCA (FRN 1029667). We may receive commission if you take out a policy. How we are funded.

    Common questions

    When does level term cover make more sense than decreasing term cover?
    Level term suits obligations that do not shrink over time, such as replacing family income, covering ongoing childcare costs, or protecting an interest-only mortgage where the balance stays the same until it is repaid in full. Because the sum assured stays fixed throughout the term, it can also cover needs beyond a single debt. Decreasing term, by contrast, is designed around a shrinking obligation, so using it for a need that does not shrink can leave a gap in later years. The type of obligation, not habit, should decide the structure.
    Why is decreasing term life insurance usually cheaper than level term?
    The insurer’s potential liability under a decreasing term policy falls every year on a set schedule, so the amount it might eventually have to pay shrinks steadily over the term. Pricing a shrinking eventual liability costs less than pricing a sum that stays the same throughout, which is why decreasing term is cheaper for the same starting figure. This is also why it is commonly sold alongside repayment mortgages, where the outstanding debt itself falls in a broadly similar pattern as monthly payments are made.
    How can a decreasing term policy end up leaving a shortfall against a mortgage?
    A decreasing term policy’s schedule assumes a particular interest rate, which is set out in the policy illustration rather than tied to your actual mortgage. If your real mortgage rate runs higher than that assumption, the outstanding balance can fall more slowly than the cover does, opening a gap between what is owed and what the policy would pay. Checking the assumed decrease rate against your current mortgage rate before buying, and again if your rate changes, is the only way to catch this early.

    Sources and methodology

    1. [1] Financial Conduct Authority. “ICOBS: Insurance Conduct of Business (FCA Handbook)”. Published Accessed 15 September 2026. View source(opens in a new tab)Primary source
    2. [2] Aviva. “Level term vs decreasing term life insurance”. Published Accessed 8 October 2026. View source(opens in a new tab)Primary source
    3. [3] Which? Money. “Term life insurance explained”. Published Accessed 8 October 2026. View source(opens in a new tab)Primary source

    We cite primary sources wherever possible. Read about our sourcing methodology.

    Written by

    Ilana Eldad

    Corporate PMI Specialist, PremierPMI

    • ACCA-qualified
    • Corporate and SME scheme specialist

    Ilana oversees business health insurance schemes for the corporate and SME team, guiding employers from initial quotes through claims and renewal. ACCA-qualified, she applies that financial background to reducing premiums and advising on tax-deductibility, and runs the largest corporate portfolio at PremierPMI.

    Read full profile

    Reviewed by

    Muhammad Junaid

    Digital Marketing Executive, PremierPMI

    • Digital marketing and search
    • Financial promotions compliance review

    Junaid leads digital marketing — search, content distribution and measurement — working with the editorial and advisory teams so that every campaign points to real, compliant guidance. He reviews anything published under the brand against the same fair, clear and not-misleading standard as the rest of the site.

    Read full profile

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