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 A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss. It Was the Best of Times, It Was the Worst of Times All about how missing the best market days (or the worst!) might affect your portfolio.