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 When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio. Tax Rules When Selling Your Home The tax rules governing profits you realize from the sale of your home have changed in recent years.