My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content The Power of Tax-Deferred Growth Why are 401(k) plans, annuities, and IRAs so popular? Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.