Inside every IUL is a charge most owners never look at. It's the cost of insurance, it comes out monthly, and it's priced like one-year term that renews every year. That structure means the price per dollar of coverage goes up every year you age. This isn't a defect and it isn't a trick buried in the fine print. It's the design. Whether it ever becomes a problem comes down to one thing you control: how well you fund the policy.
Here's the mechanism. The charge applies to the net amount at risk, the gap between your death benefit and your cash value. In a well-funded policy, cash value grows year after year, the gap narrows, and the shrinking coverage amount offsets the rising price per unit. The two curves roughly cancel, and the policy carries its costs comfortably into old age. That's the version the illustration assumed.
In a thinly funded policy, the curves compound against each other instead. Small cash value means a wide gap, charged at prices that rise every birthday. The charges eat the cash value, which widens the gap further, which raises the charges again. Left alone long enough, the policy eats itself. That usually happens in the owner's seventies or eighties, right when replacing coverage is impossible or brutally expensive. A lapse at that point can even leave a tax bill behind if loans were outstanding. Most IUL horror stories trace back to this loop: minimum premiums, maximum death benefit, and twenty years of nobody checking.
The defense is regular maintenance. Fund the policy properly, closer to the maximum the MEC rules allow than the minimum the contract accepts. Review it annually: compare actual cash value against what the illustration projected for that year, and check what the company has done to your cap since last year. Ask for an in-force illustration every few years. Read it the way we practiced in How to Read a Policy Illustration Without Getting Fooled. Our sister site keeps a practical checklist in What to Review on Your Policy Anniversary, and it covers this in ten minutes a year.
An IUL illustration is a projection built on levers the company can move and charges that only go up. That doesn't make the product bad. It makes the product a machine that needs an operator. Whole life handles the same problem a different way. The contract levels those charges from day one. The comparison between the two engines is laid out in IUL vs. Whole Life. Pick either, but pick with your eyes on the charge column, and never buy an IUL you intend to ignore.