My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. 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 The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Choices for Your 401(k) at a Former Employer Individuals have four basic choices with the 401(k) account they accrued at a previous employer. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.