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 Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. Retiring Wild: National Parks and You Get ready to enjoy America’s national park system with this helpful article. Immediate vs. Deferred Annuities Looking forward to retirement? It's critical to understand the difference between immediate and deferred annuities.