Indexed Universal Life: How Caps, Participation Rates, and Floors Shape Returns
Indexed universal life credits interest based on a market index, limited by caps and floors and reduced by policy charges. Here's a 10-year example showing how a cap trims upside and a floor protects downside.
Indexed universal life (IUL) is permanent life insurance whose cash value is credited based on the performance of a market index, within limits. You're not invested in the index directly. The policy's cap, participation rate, and floor, along with its charges, determine what actually reaches your cash value.
The short version
- Floor: the minimum credit in a period, often 0%, so index losses don't reduce the credit below that.
- Cap: the maximum credit in a period, such as 9%.
- Participation rate: the share of index gains credited, such as 100%.
- Index performance is usually measured without dividends.
- Insurers can generally change caps and participation rates within contract guarantees.
- Policy charges still come out every month, even in 0% years.
How crediting works
A hypothetical 10-year sequence of index changes, with a 9% cap, 0% floor, and 100% participation:
| Year | Index change | Credited |
|---|---|---|
| 1 | +25% | 9% |
| 2 | −18% | 0% |
| 3 | +12% | 9% |
| 4 | +8% | 8% |
| 5 | −5% | 0% |
| 6 | +30% | 9% |
| 7 | +2% | 2% |
| 8 | +15% | 9% |
| 9 | −10% | 0% |
| 10 | +20% | 9% |
$100,000 compounded under each, before policy charges:
Show the numbers behind this chart
| Year | Full index change | Credited with 9% cap, 0% floor |
|---|---|---|
| 1 | $125,000 | $109,000 |
| 2 | $102,500 | $109,000 |
| 3 | $114,800 | $118,810 |
| 4 | $123,984 | $128,315 |
| 5 | $117,785 | $128,315 |
| 6 | $153,120 | $139,863 |
| 7 | $156,183 | $142,660 |
| 8 | $179,610 | $155,500 |
| 9 | $161,649 | $155,500 |
| 10 | $193,979 | $169,495 |
In this example, the floor protected the account in the down years, but the cap trimmed the big up years. Over 10 years, the index path compounded at about 6.9% a year and the credited path at about 5.4%, before cost of insurance and other charges.
What illustrations assume
IUL illustrations project future values using an assumed crediting rate, within limits set by industry rules. Real crediting depends on actual index performance and on caps and participation rates, which can change. Ask for illustrations at lower assumed rates to see how the policy behaves if crediting disappoints; see universal life and why policies lapse.
Charges matter
Cost of insurance, premium loads, administrative fees, and rider charges are deducted regardless of crediting. In a 0% year, the account value can fall because charges continue.
Questions to ask
- What are the current and guaranteed minimum caps and participation rates?
- How is the index change measured, and over what period?
- What crediting rate does the illustration assume, and what happens at lower rates?
- What are all the charges, including riders?
- How do policy loans interact with crediting?
The takeaway
IUL trades some upside for downside protection, then subtracts policy charges. Understand the cap, floor, and participation rate, review illustrations at conservative rates, and compare with alternatives before buying.
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