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IUL Calculator — see how the floor & cap work

Indexed universal life credits your cash value based on a market index, but with an annual floor (no losses) and a cap (limited upside). This tool shows what that crediting rule does to a bumpy market — so you can understand the mechanic before you ever see a policy.

Read this first. This is an educational demonstrator of the crediting mechanic only — not an insurance illustration or a quote. It ignores the cost of insurance, premium loads, and fees, and uses fixed illustrative index returns (not a forecast). Real IUL illustrations are regulated (NAIC AG 49-A) and must come from the insurer for your specific policy. A floor protects crediting in a down year — it does not mean the policy is risk-free.

The crediting rule

$
%
%
%
IUL credited value
$0
Full index exposure
$0
Difference
$0

Crediting vs full index exposure

Year-by-year breakdown
YearIndex returnIUL creditedIUL valueIndex value

What this shows — and what it doesn’t

Watch the two lines: in a down year the full-index line falls, while the IUL line flattens (the floor credits no loss). In a strong year the IUL line rises less (the cap clips it). Over a bumpy sequence, avoiding the down years can offset giving up some of the up years — that’s the trade IUL makes. This is the same sequence-of-returns idea that matters most near retirement, and one reason IUL appears in a tax-free bucket strategy.

What this demonstrator leaves out is exactly what makes a real policy a real policy: the cost of insurance, premium loads, and administrative fees (which reduce cash value, especially early), the fact that caps and participation rates can change over time, and the risk a policy lapses if underfunded. So treat this as a way to understand the mechanic — not as what any policy would actually do. For real numbers, you need a personalized, AG 49-A-compliant illustration from the insurer. See types of life insurance for where IUL fits.

Frequently asked questions

What do the floor and cap mean?
The floor (often 0%) means a down index year credits no loss; the cap limits how much of a strong year you receive. A participation rate can scale the index move before the cap and floor apply.
Is this an IUL illustration?
No — it’s an educational demonstrator of the crediting mechanic only. It ignores costs and fees and uses fixed illustrative returns, not a forecast. A real illustration is regulated (AG 49-A) and comes from the insurer.
Does the floor make IUL risk-free?
No. Policy costs can still reduce cash value, caps and participation rates can change, and a policy can lapse if underfunded. Downside protection on crediting is not the same as no risk.

Educational only; not financial, tax, or insurance advice, and not an insurance illustration or quote. Illustrative index returns shown are not a forecast and exclude all policy costs and fees.