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. Related Content Women on the Rise Explore the growing influence women wield over the economy with this handy infographic. Managing an Inheritance A windfall from a loved one can be both rewarding and complicated. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes.