People ask me whether whole life or an IUL is better. I usually ask what the money is for, because the two policies are good at different jobs. Whole life credits a guaranteed rate, with dividends on top. An IUL, which means indexed universal life, earns credits based on a market index, with a floor that keeps a bad year from crediting a loss. I laid out how I decide in a video on choosing between whole life and an IUL, and IUL vs. whole life: how the two growth engines differ covers the mechanics.
Whole life fits money that has to be there. An emergency fund is the clearest example. If you keep three to six months of expenses on hand, you'll rarely need all of it at once. A lot of that money can sit in a whole life policy, where it grows at a guaranteed rate and the cash value doesn't fall because the market did. Rental owners have a second pile like it, a capital expense account for the roof, the water heater, the driveway, and the next paint job. That money can't come up short on the day the roof starts leaking.
Why not an IUL for that job? An IUL could credit 0% several years in a row, and the cost of insurance still comes out every month. In the designs I build, that cost is small, so the risk of having less than you put in after the first few years is low. But low isn't zero, and money for emergencies needs guarantees more than it needs upside.
Whole life also works well for a set amount of money you want to move. Say you have $60,000 sitting in savings that you want working. We can move it into a whole life policy over about seven years, because the MEC rules look at the first seven years of premiums, and a modified endowment contract, or MEC, loses the tax-free treatment of loans and withdrawals. Once the money is in, the policy can be set up so no more premium is due. You're not stuck with a bill for the rest of your life.
An IUL fits money you'd otherwise put in a retirement account. I like to fund an IUL the way you'd fund an IRA or a 401(k), with a regular amount every year until retirement. Done that way, it builds money you can reach before age 59 and a half through policy loans, without the early withdrawal penalty a retirement account charges. And it has more room to grow than whole life, as long as it has the years to do it.
Two more things decide it. The first is how you feel about risk. Plenty of my clients want nothing to do with the stock market, and whole life suits them fine. Others want the chance at bigger credits and are comfortable with a zero year now and then. The second is your age and your goal. For a couple in their 60s whose main goal is leaving money to their family, I'd usually lean toward whole life, because you can fund it and then stop, while an IUL keeps charging for insurance every year you own it.
A lot of my clients own both, sometimes several of each across one family. Both are part of an overall portfolio, and I think of whole life as the conservative part and the IUL as the part with more upside and a floor under it. Dividends and index credits aren't guaranteed, and policy loans reduce your cash value and death benefit while they're outstanding.
Before you pick, sort your money by job. Put the dollars that have to be there on a specific bad day in one column, and the dollars that have fifteen or twenty years to grow in another. The first column points toward whole life, and the second points toward an IUL. Bring both columns to your next policy review, and ask to see each one illustrated in the policy that fits it.