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 | Related Content 18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? 7 Ways to Show Your Appreciation for Mom this May For the unsung heroes who raised us, protected us, encouraged us and cleaned up after us, now is the chance to express our gratitude. Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal.