How Indexed Universal Life Insurance Works
Pending compliance review · Last reviewed October 11, 2026
Short answer: IUL is permanent life insurance with flexible premiums and cash value that earns interest based partly on a market index, within a cap and usually a floor.
The basic structure
Your premium pays the cost of insurance and policy charges. What remains goes into cash value.
Interest is credited to cash value using an index-linked formula. Your money is not invested in the market.
Caps, participation rates, and floors
A cap limits the maximum credited rate. A participation rate determines how much of the index gain counts. A floor, often 0%, limits index-related losses.
These factors vary by insurer and can change over time.
Keeping it healthy
Charges are deducted every month, even in 0% years. Underfunding, loans, and withdrawals can reduce cash value and cause the policy to lapse. Annual reviews matter.
Key terms
Frequently asked questions
Is IUL risk-free?
No. While a floor limits index-related losses, charges, loans, and underfunding can reduce value and cause lapse.
Related guides
Indexed universal life is life insurance, not a stock market investment. Illustrations are hypothetical and not guaranteed; caps, participation rates, and charges can change. Loans and withdrawals reduce values and may cause lapse and taxes. Guarantees depend on the issuing insurer’s claims-paying ability. Not tax or legal advice.