This is a type of permanent life insurance that provides a death benefit as well as a savings component. The savings component builds cash value over time. Once a substantial cash value accumulates, policyholders can borrow against it tax-free. These loans can provide supplemental income. However, it's essential to note that any outstanding loan amount (plus interest) will reduce the death benefit if not repaid.

Like whole life insurance, universal life insurance also has a savings component that builds cash value. However, it offers more flexibility in premium payments and death benefit amounts. Some universal life policies even provide potential for higher returns because their cash value can be tied to a stock market index. As with whole life insurance, you can borrow against the cash value for supplemental income.

These policies allow the policyholder to invest the cash value into various investment options, similar to mutual funds. While this offers potential for higher returns, it also comes with higher risk. The cash value can be used to supplement income, either by taking out loans or, in some cases, making partial withdrawals.

While not life insurance in the traditional sense, annuities are often sold by life insurance companies. They're contracts that can provide a guaranteed stream of income either immediately or at a future date. You can use annuities to supplement income, especially during retirement

Some life insurance policies, especially participating whole life policies issued by mutual insurance companies, might pay out dividends. These dividends can either be reinvested into the policy, used to reduce premiums, or taken as cash. When taken as cash, they can supplement your income.