In an indexed universal life (IUL) policy, the cap rate is the maximum index-linked interest the insurer will credit to your cash value for a given segment and period, no matter how much the tracked index actually gains.
How the ceiling works inside a policy
Money allocated to an indexed strategy inside an IUL is not invested in the index itself. At the end of a crediting segment, usually 12 months, the insurer measures how the chosen index performed and credits interest to that portion of your cash value based on a formula, up to the cap. Say a segment carries a hypothetical 9% cap and the tracked index gains 16% over that period. The policy is credited 9%, not 16%. The gain above the cap is simply not credited: the cap is what keeps the cost of the options behind the crediting formula within the budget the insurer sets aside for them.
The cap is not the whole story
A policy usually offers more than one indexed strategy, each with its own cap, its own participation rate, and sometimes a spread instead of a cap. A strategy with no cap at all typically carries a lower participation rate to compensate. Caps reset on a schedule set by the contract, most often each segment anniversary, and the new cap can be higher or lower than the one you started with. Nothing in the contract guarantees today's cap will still be offered next year, only that it will not fall below the policy's contractual minimum cap, if one applies.
What the cap does not cover
Even in a year when the cap is fully earned, an IUL still deducts its own charges, cost of insurance, a per-thousand charge, a policy fee, and any rider costs, directly from cash value. The floor keeps the index credit itself from going negative, but it does not stop those charges from coming out. A strong index year can still be partly offset by policy costs once you look at the net change in cash value.
Why illustrations do not just use the current cap
Because caps move, an illustration cannot simply project today's cap forward for 30 years. Actuarial Guideline 49-A sets the most an illustration may assume by running a benchmark S&P 500 account's current cap through 25-year stretches of past index history, with a further limit tied to the insurer's own investment earnings. Every other index account is held to that benchmark result. When a carrier lowers its current cap, the maximum illustrated rate usually comes down with it.
In short: a cap rate is the most an IUL segment will credit in a period, not a promise of what the policy will actually earn. Compare the current cap, the cap's history, and the guaranteed minimum cap in the contract, not just the number you were quoted once.
Frequently asked questions
What is a cap rate in an IUL policy?
It is the highest interest an indexed universal life policy will credit to a given index segment in a crediting period, regardless of how much the underlying index gains that period.
Does a higher cap rate always mean a better policy?
Not by itself. A carrier that offers a high cap on one index strategy often applies a lower participation rate or higher policy charges elsewhere, and cap rates can move at each segment's renewal, so today's number is not locked in for the life of the policy.
Why do IUL cap rates change over time?
Insurers set caps based on the cost of the options they buy to fund the index credit, plus their own margin and the policy's other charges. When option costs fall or rates rise, caps tend to move up; when the opposite happens, caps tend to come down at the next segment renewal.
Written and reviewed by
James Forren Warren
Licensed Retirement Income Strategist · License #20551202
James Forren Warren is a licensed Retirement Income Strategist with Tax Free Wealth Plan. For the past five years he has helped individuals and families turn their savings into retirement income they can count on. He writes and reviews the annuity research on this site and keeps it plain: what a product does, what it costs you, and who it actually fits.
Sources
Educational only, not investment, tax or legal advice. Tax Free Wealth Plan LLC is a licensed insurance agency, not a registered investment adviser or broker-dealer. Indexed universal life is permanent life insurance. It is not an investment in the stock market or in any index. Caps, participation rates, charges and other non-guaranteed elements can change. Policy loans and withdrawals reduce the cash value and death benefit, and a policy that lapses with a loan outstanding can create taxable income. Illustrations are hypothetical and not guaranteed. Coverage is subject to underwriting. Guarantees are backed solely by the claims-paying ability of the issuing insurance company. Features, costs and availability vary by state and change over time; the policy and its disclosure documents govern.