Term life insurance is the simplest—and typically least expensive—type of coverage. Term policies are purchased for a set period of time (the term), and if you die during that time, your beneficiary is paid the death benefit.

Terms can vary widely—10, 15, 25, 30 years or longer—and if it’s a Level Term policy, the premium and death benefit remain the same throughout the duration. If you survive the term and want to retain coverage, you must re-qualify for a policy at your new age and health status.

In addition to Level Term, other variations include “Annual Renewable Term,” in which the death benefit is unchanged throughout the term, but the insurance is renewed annually, often with an increase in premiums. With a “Decreasing Term” policy, the death benefits decrease each year until they reach zero, but the premium remains the same.

Decreasing Term life insurance is often used to cover a mortgage, student loan, or other long-term debt, so the policy expires at the time the mortgage/debt is paid off.

Whole life, or permanent, insurance pays a death benefit whenever you die, no matter how long you live. With a whole life policy, both the death benefit and premium stay the same for your entire life span.

However, depending on when you purchase coverage, the premium can vary widely depending on how much the policy’s death benefit is worth. So, for example, purchasing whole life in your senior years can be extremely expensive and possibly not even available at all.

What’s more, your whole life policy premiums will be much higher than your term life insurance premiums because the insurance company knows the policy will pay out when you die, no matter how long you live.

Indeed, the premium for whole life policies can be among the most costly of all types of life insurance coverage, including similar types of “permanent” policies discussed below. This is simply the price paid for the guaranteed death benefit and a level premium.

Universal life is a variation on whole life—it covers you for your entire lifespan, but also contains a “cash-value” component. Rather than putting 100% of your premium toward your death benefit, part of your premium is put into a separate cash-value account that earns interest and is tax-deferred.

The insurance company invests the cash-value funds in various investment vehicles of its choice, and provided the market performs well, you can access those extra funds for things like paying the policy’s premiums, paying off debt, or supplementing your later-in-life fixed income. Some insurance companies will even let you take tax-free loans against the policy’s cash value.