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. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. Tax-Loss Harvesting: A Tax Strategy to Consider Not every investment will be a winner, but a strategy called tax-loss harvesting can potentially lower your tax bill.