How Does an IUL Actually Work?

An IUL policy is not directly invested in the stock index it references. Instead, the insurer credits interest to your cash value based on that index's performance over a set period, subject to a cap, a participation rate, and a floor -- you never actually own shares of the index or receive dividends from it.

A cap limits the maximum interest that can be credited in a given period, even if the index performed better. A participation rate determines what percentage of the index's gain counts toward crediting. A floor (commonly 0%) limits how much you can lose from a negative index period -- but the floor protects against losing credited interest to a bad index year, not against policy charges reducing your cash value regardless of index performance.

• Caps and participation rates are set by the insurer and can change over time, within contractual limits
• A 0% floor means the index-linked crediting itself won't go negative -- it does not mean your account balance can never decrease

Cost of insurance and other policy charges are deducted from cash value on an ongoing basis, regardless of how much interest is credited. In a year with little or no index-linked crediting, these charges can still reduce your cash value.

A policy illustration typically shows both a guaranteed column (the contractual minimum) and a non-guaranteed, current-assumption column (a projection based on current caps, rates, and charges, which are not locked in for the life of the policy). The non-guaranteed numbers are not a promise.

If cash value becomes insufficient to cover ongoing policy charges -- because of low crediting, withdrawals, loans, or reduced premium payments -- the policy can lapse, ending coverage. A lapse with an outstanding loan can also create an unexpected tax consequence (see how IUL policy loans work).