Indexed Universal Life (IUL) is permanent life insurance with a cash value account whose growth is linked to a market index, such as the S&P 500. You are not invested in the market itself. Instead, the insurance company credits interest to your cash value based on how the index performs, subject to limits the policy defines.
The three numbers that matter
- Floor — the minimum credited rate, often 0%. In a year the index falls 20%, your credited interest is 0% rather than a loss.
- Cap — the maximum credited rate. If the cap is 10% and the index gains 18%, you are credited 10%.
- Participation rate — the share of index growth you receive. A 50% participation rate on a 12% index gain credits 6%.
These levers are how the carrier funds the downside protection. They can usually be adjusted by the carrier within contractual limits, which is why two illustrations of the "same" product can look very different.
What the floor does not protect
A 0% floor protects the credited interest, not the whole policy. Cost of insurance charges, premium loads, and policy fees are deducted every year regardless of index performance. In a string of 0% years, cash value can decline. Understanding the fee schedule is as important as understanding the crediting method.
Who tends to look at IUL
People with a long horizon (often 15+ years), a genuine need for a death benefit, and a preference for limited downside often explore IUL as a complement — not a replacement — to retirement accounts. Whether it fits your situation depends on funding level, policy design, and your alternatives.
This material is educational only and is not financial, legal, or tax advice. IUL policies involve fees, charges, and surrender periods. Review carrier materials and consult a licensed professional before making decisions.