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 What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government.