Why Isn't All Earned Income Subject to Social Security's Payroll Tax? September 6, 2018 admin Trading Ideas Comments Off on Why Isn't All Earned Income Subject to Social Security's Payroll Tax? In 2018, earned income above $128,400 is exempt. …read more Source:: Yahoo Finance Discover Tomorrow’s Winning Stocks! Thank you for subscribing. Something went wrong. Get our latest stock reports before everyone else! Actionable news, and breakout stocks w multi-bagger upside potential — delivered directly to your inbox. Your privacy is our priority. Your email address will never be sold or shared with anyone else.