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Indexed Universal Life (IUL) Explained — Caps, Costs and Real Returns

Indexed universal life is permanent insurance with a cash value credited from the movement of an index such as the S&P 500, subject to a floor of 0% and a cap or participation rate. It is the most oversold and the most misunderstood product in the business — and in the right hands, a legitimate tax-advantaged accumulation tool.

The mechanics in one pass

  1. You pay premium. Policy charges and the cost of insurance come out first.
  2. What remains goes into an index account with a stated segment term, usually 12 months.
  3. At segment maturity the index change is measured and credited, floored at 0% and limited by a cap (say 9.5%) or a participation rate.
  4. Cash value can be accessed later through withdrawals to basis and policy loans, which are not taxable while the policy stays in force.

Why funding level decides everything

The same policy design can be a sound accumulation vehicle or a lapse waiting to happen. A minimum-funded IUL sold on a large death benefit spends most of its premium on insurance charges that rise every year. A max-funded design buys the smallest death benefit the IRS allows for the premium, which minimizes charges and leaves more dollars indexed.

What to stress test before you sign

  • Re-run the illustration at 5% and at the guaranteed rate, not just at the illustrated rate.
  • Ask for the cost-of-insurance schedule at ages 75, 80 and 85.
  • Confirm the cap is not guaranteed and check the minimum guaranteed cap in the contract.
  • Check whether loans are fixed or participating, and what the loan charge rate is.

Guides in this section

Frequently asked questions

Is an IUL better than a 401(k) or Roth IRA?
No. Tax-qualified accounts with an employer match or Roth treatment generally come first because they have no insurance charges. IUL is usually considered after those are funded, for people who want more tax-advantaged room plus a death benefit.
What return should I expect from an IUL?
Long-term illustrated rates in the 5%-6.5% range on the index account are realistic under current caps, before policy charges. Net internal rates of return on cash value in a well-funded policy commonly land in the 3%-5.5% range over 20-30 years.
Can an IUL lose money?
The index credit cannot be negative, but cash value can still fall because policy charges are deducted in years with 0% credits. A 0% year is not a break-even year.