Interest tied to an index, not invested in it.
Indexed universal life credits interest through a formula linked to a market index, inside limits the company sets. Here's how those limits work and what an illustration can and can't promise.
Quick answer Indexed universal life insurance is universal life whose cash value earns interest based on how an outside market index changes over a set period, without your money being placed in the index or the stock market.
- In indexed universal life, a participation rate sets the share of the index change that counts, a cap sets the most that can be credited, and some designs subtract a spread.
- An IUL floor protects the interest credit, not the account: policy charges keep coming out of the cash value, so the cash value can shrink in a flat or down year.
- IUL caps and participation rates are usually set for a period and can change afterward, within any minimums the contract guarantees.
- AG 49-A is an NAIC actuarial guideline that limits how insurance companies illustrate life policies with index-based interest.
- IUL policy loans that aren't repaid are subtracted from the death benefit, and a lapse or surrender with loans may be taxable.
By Sam Alishahi · CA Insurance License #4348151 · Reviewed October 2026 · How this page is researched
Caps, floors and participation rates
Indexed universal life is universal life whose cash value earns interest based on how an outside index changes over a set period. Your money isn't placed in the index or the stock market. The company applies a formula that usually passes along only part of the index change: a participation rate sets the share that counts, a cap sets the most that can be credited, and some designs subtract a spread. A floor, written into the contract, sets the lowest index credit for a period when the index falls.
A floor protects the interest credit, not the account. Universal life charges keep coming out of the cash value, so in a flat or down year the value can shrink, and an underfunded policy can lapse. Caps and participation rates are usually set for a period and can change afterward, within any minimums the contract guarantees. The illustration you see is limited by NAIC's actuarial guideline for indexed products, AG 49-A, but it remains a projection, not a promise.
- Participation rateThe share of the index increase used to figure your interest credit.
- Cap rateThe most interest the account can be credited for an index period.
- FloorThe lowest index credit for a period. Policy charges are still deducted.
- SpreadA percentage some designs subtract from the index change before crediting.
What underwriters will ask
Having these ready means I can go to market on the first call. The quote form asks for the same things, and anything you don’t know yet can wait.
- Goal: a lifetime death benefit, cash value, or both, and which matters more.
- Premium: what you can pay each year, and for how many years.
- Time horizon: how long you expect to hold the policy before touching the cash value.
- Ages: the insured's date of birth.
- Existing coverage: term, permanent or group policies, plus any IUL illustration you've been shown.
- Advisors: your tax advisor or financial planner, if you'd like them in the conversation.
Indexed universal life, answered
Is indexed universal life a stock market investment?
No. The cash value isn't invested in the index. The insurance company credits interest using a formula tied to the index's change over a period, and that formula usually counts only part of the change. You don't own shares, and you aren't credited the index's full gain.
How do caps and participation rates work together?
The participation rate decides how much of the index increase counts, and the cap limits the total credit. With a 100% participation rate and a cap, any gain above the cap is credited at the cap. With a participation rate below 100%, only that share of the gain counts. These rates are usually set for a period and can change, within any minimums the contract guarantees.
Can an IUL policy lose value?
Yes. The floor keeps the index credit from dropping below its minimum, but the cost of insurance and other charges are still deducted from the cash value. In a year with no index credit, the cash value can go down, and you may need to pay more to keep the policy in force.
What is AG 49-A?
An NAIC actuarial guideline that limits how companies illustrate life policies with index-based interest. It applies to policies sold on or after December 14, 2020, and was revised in 2023 to tighten illustration limits and in 2026 to add consumer disclosures. It limits the projection; it doesn't guarantee the result.
Can I borrow from the cash value?
Yes, at the loan rate in the policy. Loans that aren't repaid are subtracted from the death benefit, and if the policy lapses or is surrendered the result may be taxable. Talk to a tax advisor before relying on loans for income.
How is IUL different from a fixed indexed annuity?
Both credit index-linked interest using participation rates, caps or spreads. IUL is life insurance, with a death benefit and ongoing charges for it. A fixed indexed annuity is a contract built to accumulate money and pay you income, which can last for life.
Do you offer indexed universal life insurance outside California?
Yes. Clients across the country send the same quote form. California policies are placed directly; outside California the request is handled together with a partner agency in your state, and the shopping across carriers works the same way. Rules, minimums and markets differ by state — see insurance requirements by state.
Official sources
- NAIC: life insurance illustrations, AG 49 and AG 49-A for index-based policies
- NAIC: Buyer's Guide for Deferred Annuities (participation rates, caps, spreads and index crediting)
- California Department of Insurance: Life Insurance and Annuities guide (universal life, loans, surrender)
- New York Department of Financial Services: consumer alert on universal life policies (2019)
Bring the illustration. I'll walk through it.
If you've already been shown an IUL proposal, send it. Otherwise, your goal and a yearly budget are enough to start.
Alishahi Insurance · Saman Alishahi, independent insurance broker, California License #4348151. General information, not a quote or a promise of coverage; coverage depends on underwriting and the terms, conditions and exclusions of the policy actually issued.
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