The Internal Revenue Service announced the following annual limits for retirement plans and health Flexible Spending Accounts (FSAs) for 2021. Many, but not all, of the 2021 limits remain unchanged. This includes the employee elective deferral limit to 401(k), 403(b), and 457(b) plans, which remains unchanged at $19,500, and voluntary employee salary reduction contributions to a health FSA, which remains unchanged at $2,750.