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 Should You Tap Retirement Savings to Fund College? There are three things to consider before dipping into retirement savings to pay for college. Retirement Traps to Avoid Beware of these traps that could upend your retirement. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions.