Retirement savings are a finite amount of money that you will need to withdraw money from to support your retirement. Unless you’ve amassed a very significant amount of wealth, you risk running out of money in retirement for many reasons, like:   you wound up living longer than you expected or markets didn’t do as well as you expected. Retirement income, on the other hand, is infinite. It comes in the form of Social Security, pensions, and annuities, all of which are not dependent on the market and are guaranteed to last as long as you do.