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 My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Preparing for the Expected You can plan ahead to protect yourself and your family against the financial consequences of deteriorating health. Understanding the Alternate Valuation Date Executors can value the estate on the date of death, or on its six-month anniversary —the “Alternate Valuation Date."