Whole life is the conservative chassis: a level premium, a death benefit that stays in force for life as long as premiums are paid, and a cash value schedule printed in the contract. A participating policy may also pay dividends, but dividends are never guaranteed.
Indexed universal life (IUL) credits its cash value based on the movement of a market index, subject to a cap, a participation rate or a spread, with a floor that is commonly 0%. Your premiums are not placed in stocks or bonds. Policy charges come out whether the index year was good or flat.
The real question is how much of the outcome you want written into the contract.
I compare both from the guaranteed column first, and let upside be upside.
On whole life, the guaranteed column is the contract. On IUL, it shows what the policy does if credits sit at the floor and charges run at their contractual maximums. Start there, then read the projected column.
The floor means a negative index year credits nothing rather than a loss. The cap, participation rate or spread limits how much of a good year you keep, and the carrier can lower them. IUL illustrations follow AG 49-B, in effect since May 2023.
IUL deducts cost-of-insurance and other charges from the cash value, and cost of insurance climbs with age. In a zero-credit year those charges still come out, so cash value can fall. Whole life's costs are built into its fixed premium.
Both let you borrow against cash value. A loan that grows too large can lapse the policy and create a tax bill. On IUL, underfunding is the other common road to a lapse.
General information, not tax or legal advice; your contract and the carrier's disclosures control. The products in depth: Whole life → Indexed universal life → Meeting in the Sacramento area? How I work locally →
Neither is better for everyone. If contractual certainty matters more to you than upside, whole life is usually the better fit. If you need premium flexibility and will fund the policy steadily for many years, IUL can fit.
In IUL the index credit cannot go below its floor, but policy charges come out regardless, so cash value can fall in a zero-credit year and an underfunded policy can lapse. In whole life the cash value follows a guaranteed schedule as long as premiums are paid. In both, surrendering in the early years can return less than you paid in, and every guarantee rests on the issuing carrier's claims-paying ability.
No. A participating whole life policy may pay dividends when the company's results beat its own assumptions, but the company decides each year. An IUL does not receive the dividends of the stocks in its index; its credit comes only from the index formula.
Both let you borrow against the cash value. Loans accrue interest and reduce the cash value and death benefit until repaid, and a lapse with a loan outstanding can create a tax bill. Funding either policy past the seven-pay limit makes it a modified endowment contract, which changes how loans are taxed.
Ask for both at the same premium and read the guaranteed columns side by side before the projected ones. Illustrated values are not guaranteed. If an IUL design only works at the highest rate the carrier allows, it does not work.
Send me your age, health picture and what you could fund each year. I will bring a whole life and an IUL illustration at the same premium, from more than one carrier, so you can read the guaranteed columns side by side.