What IUL is
IUL stands for indexed universal life. It is a type of universal life insurance, and universal life is a type of permanent life insurance — cover designed to last for your lifetime, as opposed to term cover for a set number of years. The site’s comparison data lists indexed universal life as a universal life product: Pacific Life’s row describes a permanent focus on universal life including indexed universal and variable universal life, and Lincoln Financial’s row lists universal life in variable and indexed forms.
The name carries the definition. “Universal” is the policy family; “indexed” is the crediting method — the cash value is credited by reference to a market index. That is the whole of the definition this guide states: the mechanics of the credit, and the figures that go with them, live in the policy wording, and this guide does not reproduce them.
Two things this guide deliberately does not do. It does not quote any cap, floor, participation rate, credited rate or return figure for any IUL product, because none is verified on any source this site cites. And it does not rank carriers or recommend a policy: the site does not publish carrier rankings, and the comparison page at compare life insurance lays out what each company itself publishes instead. For the official starting point on life insurance types, see the NAIC life insurance pages named in the sources below, and for the term and whole life sides of the comparison, the guide to term vs whole life insurance.
How the cash value works
Three terms decide how the cash value is credited, and they are worth learning as words before any figure is discussed. A cap is the maximum credit applied in a period. A floor is the minimum credit applied in a period. A participation rate is the share of the index’s movement that is credited. Those are what the words mean; the figures themselves — the size of the cap, the level of the floor, the participation percentage — are set per policy and are not quoted here.
Because the credit is tied to an index, it varies from period to period, and that variability is the point of the product and the main thing to understand before buying. Ask the insurer in writing how the credit is calculated in a period when the index rises, in a period when it falls, and in a period when it stays flat — and what happens to the cash value in each of those three cases. An answer that covers only the rising case has not answered the question.
Do not transfer whole life’s cash-value description to IUL. Whole life’s cash value builds gradually and can usually be borrowed against, although loans and withdrawals reduce the death benefit — that is the whole-life side, as the term vs whole guide states it. IUL’s cash value is credited by reference to an index through the cap, floor and participation rate above, and the two should not be described as if they worked the same way.
IUL vs term life, and vs whole life
Against term life the difference is the job. Term life is protection for a set number of years with no cash-value component: it is protection only, which is why it is often described as “pure” life insurance, and it lets you buy a large death benefit for a limited period at a lower starting premium than whole life for the same benefit. It fits needs that shrink or end — replacing income while children depend on you, or covering a mortgage until it is paid off. IUL is permanent cover with a cash value, built for a need that does not end. The life needs calculator sizes the need first, then its term-vs-whole section tests the same cover amount both ways.
Against whole life the difference is the crediting method, not the permanence: both are permanent cover. Whole life’s cash value builds on a schedule set by the carrier and the contract. IUL’s cash value is credited by reference to an index, through a cap, a floor and a participation rate. Universal life is the parent type of IUL; whole life is a different permanent type, and the term vs whole guide compares term and whole only — universal life, including indexed universal life, is the third permanent type it does not cover. The parent type is explained in full in the site’s guide to universal life insurance.
Costs and risks — what to check in writing
Three things vary, and each one is a question to ask in writing rather than a figure to assume. First, the index credit: it varies by period, so ask what the credit would be in a flat year and in a falling year, not only in a rising year. Second, the cost of insurance: ask whether it can change over the life of the policy, and what happens to the policy if it does. Third, the premium needed to keep the policy in force: ask what happens if the crediting is low for several years in a row, and how much more would have to be paid to keep the cover.
Apply the same discipline to the lapse conditions: read the cost-of-insurance schedule, the crediting method and the lapse conditions in the policy itself, not in the sales illustration. Ask under what conditions the policy can lapse, what warning is given before it does, and what happens to the cash value and the death benefit if it does.
None of this is a reason to buy or not to buy. It is the checklist that decides whether the policy you are considering does the job you are buying it for, at a premium you can still be paying in twenty years. A policy whose terms you have not read is not a policy you have compared.
Who it may suit, and who it may not suit
It may suit someone who wants permanent cover, understands that the credit varies with the index, and is willing to read the cap, the floor and the participation rate in the policy wording before deciding. That is a decision rule, not a recommendation: the fit depends on the policy in front of you, not on the product type in general.
It may not suit someone who wants the lowest starting premium for a temporary need — that is term life’s job, and the life needs calculator shows the size of that need first. And it may not suit someone who wants a cash value that does not depend on an index — that is whole life’s shape, as the term vs whole guide describes it. If neither of those descriptions fits, the question is not which permanent type to buy but whether permanent cover is the need at all.
Worked example
Consider two ILLUSTRATIVE buyers who both want permanent cover. The first buys whole life: the cash value builds gradually on the carrier’s schedule, and can usually be borrowed against, with loans and withdrawals reducing the death benefit. The second buys IUL: the cash value is credited by reference to an index, through a cap, a floor and a participation rate set out in the policy wording. If the index rises strongly, the second buyer’s credit may be higher than the first’s build; if the index is flat or falls, it may be lower — and the cap limits the upside in the strong period just as the floor sets the minimum in the weak one. These are ILLUSTRATIVE contrasts to explain how the two crediting methods differ; they predict no real person’s cash value, and no cap, floor, participation rate or return figure is asserted for either buyer.
Illustrative example only — not a fact about any real policy.