Smartasset approximately 20 per cent less approximately 20 percent less $35,592 per year. smartasset.com average millennial salary approximately 20 percent less the average salary of a millennial The average millennial makes just shy of $36,000 per year millennial 20 percent less according to a SmartAsset study average salary of millennials millennial relatively poorer by 20% compared to to baby boomers, lower according to a SmartAsset study SmartAsset According to SmartAsset salary of a millennial