A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals. 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 Message Thank you! Oops! Related Content Important Birthdays Over 50 Here's a look at several birthdays and “half-birthdays” that have implications regarding your retirement income. Choosing a Business Structure Entrepreneurs all face the same question, “Which business structure should I adopt?” What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement.