Indexed Universal Life as a Retirement Plan: What the Illustration Does Not Show

Key takeaways

An IUL is life insurance first; the "retirement income" is a series of policy loans against cash value that must stay in force for life to remain tax-free.
Returns are capped, dividends are excluded, participation rates and caps can be lowered by the insurer, and the illustrated rate is a marketing assumption.
Cost of insurance charges rise every year and can consume the cash value in later life, causing the policy to lapse and the loans to become taxable.
For most people, a maxed 401(k), a Roth IRA, a backdoor Roth, and a taxable account do the same job with less cost and no lapse risk.

Few products generate as many questions from new clients as indexed universal life insurance. The pitch is genuinely compelling: stock market upside with no downside, tax-free growth, tax-free income in retirement, no contribution limits. It shows up in a glossy illustration with a policy funded for fifteen years and then paying out six figures a year, tax-free, for life.

We're fee-only and don't sell insurance, so our only interest is whether the product does what the illustration says. Usually it doesn't, and the reasons are baked into the structure.

What an IUL actually is

An indexed universal life policy is permanent life insurance. Premiums go into a cash value account after the insurer takes out expense charges and the cost of insurance for the death benefit. The cash value earns interest credited according to the performance of a stock index, typically the S&P 500, subject to a floor (often 0%) and a cap (often somewhere between 8% and 11%, and adjustable by the insurer). Dividends, which have historically been a meaningful share of the S&P 500's total return, are left out.

"Retirement income" from an IUL isn't a withdrawal. It's a policy loan against the cash value. Loans aren't taxable as long as the policy stays in force. If the policy lapses with loans outstanding, the entire gain becomes taxable income in that year, usually at the worst possible time.

What the illustration assumes

An illustration is a projection under assumptions chosen by the seller within limits set by regulators. The things to check are the ones that actually drive the outcome.

The illustrated rate. Illustrations commonly assume 6% to 7% credited every year. With a 0% floor and a 9% cap, the long-run credited rate on an S&P 500 index without dividends has been meaningfully lower in most independent analyses, and it isn't smooth. Ask to see the illustration at 4% and at the guaranteed minimum.

The cap. The insurer can cut caps and participation rates on existing policies, and many have. A policy bought with an 11% cap can find itself at 8% a decade later, and now the illustration can't be reached.

Cost of insurance. The monthly charge for the death benefit is based on age and rises every year. In a policy's later decades, those charges can outrun the interest credited, and the cash value starts to fall. Add an outstanding loan balance that's compounding, and that's how IULs sold for "tax-free income" lapse in the policyholder's eighties.

Loan interest. Policy loans charge interest, often 5% to 6%, sometimes offset by continued index crediting on the borrowed amount ("wash" or "participating" loans). When the credited rate is below the loan rate, the loan grows faster than the account backing it.

Surrender charges. Most IULs impose surrender charges for ten to fifteen years. The cash value shown in the early years isn't what you'd walk away with if you left.

The commission

An IUL pays the agent a commission that's typically a large percentage of the first year's target premium, often in the range of 50% to 100% or more, with smaller renewals. That doesn't make the product bad on its own. But it explains why it gets recommended so often, why it's pitched to people who haven't maxed their 401(k) yet, and why the illustrations assume the most favorable inputs allowed.

The comparison that matters

The right comparison isn't IUL versus doing nothing. It's IUL versus the accounts that do the same job.

A 401(k) with a $24,500 deferral limit in 2026 ($8,000 more at 50, $11,250 at 60 to 63). A Roth IRA at $7,500 (or a backdoor Roth above the income limits). An HSA at $4,400 or $8,750. After-tax 401(k) contributions converted through the mega backdoor Roth, which can shelter tens of thousands more per year. And a taxable brokerage account holding index funds, which is taxed at capital gains rates, gets a step-up at death, and has no lapse risk, no caps, no cost of insurance, and no surrender charges.

Someone who has genuinely filled all of those and still has money left to invest is rare. For that person, an IUL is at best a modest, expensive complement. For everyone else, it crowds out better accounts.

When permanent insurance does make sense

Permanent life insurance has legitimate uses, and we'd rather be precise about them than dismissive. A dependent with lifelong special needs. An estate above the $15 million exemption where a policy in an irrevocable trust provides liquidity for the tax. A business buy-sell agreement. A specific legacy goal where the guaranteed death benefit is the whole point. In those cases the policy is bought for the death benefit, compared across carriers on cost, and often structured as guaranteed universal life or whole life rather than an indexed product with a story attached.

None of those cases is "I want tax-free retirement income."

If you already own one

Don't surrender it without a review. Depending on the policy's age, cash value, surrender charge, and your health, the right answer might be to keep it, reduce the death benefit to lower the cost of insurance, stop premiums and let it run, exchange it tax-free under Section 1035 into a lower-cost policy or an annuity, or surrender it. We run an in-force illustration at a realistic rate, look at the loan balance if there is one, and lay out the options. That review is part of what risk and insurance review covers, and there's no product waiting on the other side of it.

Frequently asked questions

Is the growth in an IUL really tax-free?

Interest credited inside the policy is tax-deferred, and loans against it aren't taxed while the policy is in force. If the policy lapses or is surrendered with a gain, the gain is taxable as ordinary income. "Tax-free" depends entirely on the policy outliving you.

Can I lose money in an IUL?

The index crediting has a floor, but the policy charges don't. Cost of insurance, expense loads, and rider charges come out regardless of index performance, so the cash value can decline in a flat or capped year, and can go to zero in later life.

What is the difference between IUL and whole life?

Whole life has fixed premiums, a guaranteed cash value schedule, and dividends from a mutual insurer; it's more expensive but more predictable. IUL has flexible premiums and index-linked crediting with caps; it's cheaper up front and carries more risk that the policy underperforms and lapses.

What should I ask an agent proposing one?

Show me the illustration at the guaranteed rate and at 4%. What's the current cap, and how many times has this carrier lowered caps in the last ten years? What's the loan rate? What's the surrender charge schedule? What's your commission? And why should I fund this before my 401(k) is maxed?

Joseph G. Valerio, CFP®, EAFounder and Lead Advisor at Valerio Wealth Management, a fee-only, fiduciary virtual family office in Miami, Florida. One advisor, credentialed in both financial planning and federal tax. About Joseph

This article is general education, not individualized advice, and it is not tax, legal, or accounting advice. Figures reflect federal law for the year stated and can change. Valerio Wealth Management does not prepare or file tax returns. Speak with a qualified professional about your own situation before acting.