Indexed Universal Life (IUL)

Indexed universal life is universal life insurance in which the interest credited to the policy value is determined by the movement of an external index, most commonly a broad stock index, rather than by a rate the insurer declares outright. The index is a measuring stick, not an investment: the policyholder owns no shares and receives no dividends, and the insurer credits an amount derived from the index's change over a defined segment period, limited on the upside and floored on the downside.

The naming deserves a note, because the market name and the regulatory names are different and a reader who searches for one will not find the other. Consumers, agents and insurers say indexed universal life, or IUL. NAIC's Universal Life Insurance Model Regulation does not use that phrase in its definitions; section 3.E defines an "interest-indexed universal life insurance policy" as "any universal life insurance policy where the interest credits are linked to an external referent." The guideline that actually governs how these policies are illustrated, Actuarial Guideline XLIX-A, is titled "The Application of the Life Illustrations Model Regulation to Policies with Index-Based Interest" and regulates defined terms called Indexed Credits and Index Accounts. The market name does appear in NAIC material: the guideline's own project history explains that its 2023 revisions "intend to improve illustrations for indexed universal life (IUL) products with uncapped volatility-controlled funds and a fixed bonus." So there are three vocabularies for one product, and the definitions to read are the regulatory ones.

The crediting mechanism is where the product lives, and it is worth understanding as a sequence rather than as a rate. Money allocated to an index account sits there for a segment, often a year. At the end of the segment the insurer measures the index's change, applies whatever limits the contract specifies, and credits the result as interest. A cap sets a maximum credited rate. A participation rate credits a stated percentage of the index change. A spread or margin subtracts a fixed amount from the index change before crediting. A floor, almost always zero, means a negative index change credits nothing rather than a loss. Contracts commonly combine these, and most reserve the right to change the cap, participation rate or spread on future segments within stated guaranteed limits. A page like this one should not quote a typical cap or participation rate, because those numbers are set product-by-product and change month to month; the mechanism is stable and the numbers are not.

The floor is the most misread feature in the product. It is a floor on credited interest, not on the policy value. Cost of insurance, expense loads and rider charges are deducted from the account whatever the index does, so a year in which the index falls and the policy credits zero is a year in which the account goes down by the amount of the charges. Over a long flat stretch that compounds, and the policy behaves like a universal life contract earning nothing, which is exactly what it is.

On regulatory classification: an indexed universal life policy is generally treated as insurance under state law rather than as a security registered with the SEC, and it is sold by state-licensed insurance agents. The registered sibling is variable universal life, whose subaccounts are securities and which is sold by prospectus. The same split exists on the annuity side of the business, between a fixed indexed annuity and a registered index-linked annuity, and the classification decides both who may sell the contract and what disclosure the buyer receives.

The illustration problem is a documented regulatory finding, not an editorial one, and NAIC states it in the guideline's own background section: before uniform guidance existed, "two illustrations that use the same index and crediting method often illustrated different credited rates," which "can be confusing to potential buyers." Actuarial Guideline 49-A, effective for policies sold on or after December 14, 2020, responds by capping the illustrated crediting rate, limiting the loan leverage an illustration may show, and requiring extra disclosure. Section 7 requires the basic illustration to show a more conservative alternate-scale ledger "alongside the ledger using the illustrated scale with equal prominence," plus a table of the minimum and maximum geometric average annual credited rates and, for each index account illustrated, "a table showing actual historical index changes and corresponding hypothetical Indexed Credits using current index parameters for the most recent 20-year period." Section 6 limits the illustrated policy loan credited rate to no more than 50 basis points above the illustrated loan interest rate, which exists because illustrations had been showing policies that borrowed from themselves at a profit. Reading the alternate-scale column first is the single most useful thing a buyer can do with an IUL illustration.

Money allocated to an index account is tracked as a segment with a start date, an index level at that date, and a set of crediting parameters. At the end of the segment the insurer compares the index level then with the level at the start, applies the cap, participation rate or spread, applies the floor if the change was negative, and credits the resulting interest to the policy value. Policy charges are deducted on their own schedule, independent of all of this.

A hypothetical, using round numbers rather than any real product's terms. Suppose $50,000 sits in an annual point-to-point index account with a 9% cap, a 100% participation rate and a 0% floor.

In year one the index rises 14%. The participation rate credits all of it, but the cap stops the credited rate at 9%, so interest of $4,500 is added. The five points of index gain above the cap are simply not credited. Cost of insurance and expense charges for the year, say $1,800, come out on their own schedule, so the account ends the year at $52,700.

In year two the index falls 12%. The floor means the credited interest is zero rather than negative. The same $1,800 of charges is still deducted, so $52,700 becomes $50,900. The account fell in a year the product is often described as protecting, and it fell by exactly the charges.

Now change one parameter and re-run year one. Suppose the account has no cap but a 60% participation rate. The same 14% index gain credits 8.4%, or $4,200 on the opening $50,000, rather than the $4,500 the capped version credited. Neither structure is inherently better; the pairing of cap, participation rate and spread is the whole bargain, and comparing two policies means comparing all three together rather than the headline number.

Pros

• The floor removes the risk of the index itself producing a negative credit, which is a genuine difference from a variable policy whose subaccounts can lose value directly.
• It keeps the universal life chassis, so premium timing and the death benefit remain adjustable within the contract's limits.
• Cash value accumulates without current income tax while it stays inside the contract, and the death benefit is generally received free of income tax.
• Because it is not a registered security, it can be bought through an insurance agent without a brokerage relationship, which some buyers prefer.
• Since December 2020, illustrations have had to show a conservative alternate scale with equal prominence, which gives a buyer a second number to judge the first one against.

Cons

• A zero floor protects the credited interest, not the account. Policy charges come out in every year, so a run of flat index years reduces the value.
• The insurer generally controls the cap, participation rate and spread on future segments, so the terms that decide your return can be reset within guaranteed limits after you have bought.
• Comparing two policies is genuinely hard, which is the problem regulators named: the same index and crediting method could produce different illustrated rates before AG 49-A imposed uniform assumptions.
• Dividends on the underlying index are not credited, so the index change the policy measures is smaller than the total return the index actually produced.
• It carries every universal life failure mode as well, including rising cost of insurance charges and lapse risk on an underfunded contract.