IUL · 9 min read
IUL Calculator Walkthrough: What the Numbers Mean and What They Hide
Easy to use, easy to over-trust. Learn what an IUL calculator assumes, which rates to stress-test, and what no chart will show you.
What an indexed universal life calculator actually does
It projects cash value, death benefit, and sometimes loan income from age, health class, premium, funding years, and an assumed crediting rate — not future markets.
Website calculators use generic assumptions. Carrier illustration software uses real charges under NAIC rules (AG 49).
Inputs that move the result
Assumed rate matters most — run illustrated rate, ~4%, and ~0%. Then premium, funding years, age, health class, loan interest, and death benefit option.
IUL doesn’t compound at a steady rate; caps and zero-credit years matter. A smooth 6% line hides bad sequences.
Stress testing and what calculators hide
Ask for guaranteed, midpoint, and illustrated columns. Test skipping premiums. Check if the policy lapses at 80 in a low case.
No calculator shows cap changes after issue, tax law changes, moving loan interest, or behavior in down markets.
Frequently asked questions
- How accurate is an IUL calculator?
- Only as good as assumptions — useful for direction, not final decisions.
- What does the guaranteed column mean?
- Outcome if the insurer credits minimums and charges maximums — your contractual floor.
- What interest rate should I use?
- Run several: illustrated (high), ~4% (mid), and ~0% (stress).
Educational information only. This article is not financial, tax, or legal advice and does not recommend any product.
