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 Why Everyone Needs an Estate Strategy Do you have an estate strategy? You should. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.