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 Question Thank you! Oops! Related Content Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Retirement Traps to Avoid Beware of these traps that could upend your retirement. Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio.