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 Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy. How Stocks Work Understanding how a stock works is key to understanding your investments.