Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. Financial Hacks for Millennials: Don’t Get Burnt With FIRE Financial Independence, Retire Early (FIRE), also known as radical savings, encourages aggressive saving to retire by age 40.